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  • Aircraft Propulsion and Power
  • Industrial Chemistry
  • Inorganic Chemistry
  • Organic Chemistry
  • 2020-2024
  • 2010-2014  (43)
  • 1950-1954  (1,063)
  • 2013  (43)
  • 1954  (1,063)
  • 1
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    Session 6: Dynamic Modeling and Systems Analysis (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: These presentations cover some of the ongoing work in dynamic modeling and dynamic systems analysis. The first presentation discusses dynamic systems analysis and how to integrate dynamic performance information into the systems analysis. The ability to evaluate the dynamic performance of an engine design may allow tradeoffs between the dynamic performance and operability of a design resulting in a more efficient engine design. The second presentation discusses the Toolbox for Modeling and Analysis of Thermodynamic Systems (T-MATS). T-MATS is a Simulation system with a library containing the basic building blocks that can be used to create dynamic Thermodynamic Systems. Some of the key features include Turbo machinery components, such as turbines, compressors, etc., and basic control system blocks. T-MAT is written in the Matlab-Simulink environment and is open source software. The third presentation focuses on getting additional performance from the engine by allowing the limit regulators only to be active when a limit is danger of being violated. Typical aircraft engine control architecture is based on MINMAX scheme, which is designed to keep engine operating within prescribed mechanical/operational safety limits. Using a conditionally active min-max limit regulator scheme, additional performance can be gained by disabling non-relevant limit regulators
    Keywords: Aircraft Propulsion and Power
    Type: GRC-E-DAA-TN12088 , Propulsion, Control, and Diagnostic Workshop; Dec 11, 2013 - Dec 12, 2013; Cleveland, OH; United States
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  • 2
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    Computational Study of the CC3 Impeller and Vaneless Diffuser Experiment (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Centrifugal compressors are compatible with the low exit corrected flows found in the high pressure compressor of turboshaft engines and may play an increasing role in turbofan engines as engine overall pressure ratios increase. Centrifugal compressor stages are difficult to model accurately with RANS CFD solvers. A computational study of the CC3 centrifugal impeller in its vaneless diffuser configuration was undertaken as part of an effort to understand potential causes of RANS CFD mis-prediction in these types of geometries. Three steady, periodic cases of the impeller and diffuser were modeled using the TURBO Parallel Version 4 code: (1) a k- turbulence model computation on a 6.8 million point grid using wall functions, (2) a k- turbulence model computation on a 14 million point grid integrating to the wall, and (3) a k- turbulence model computation on the 14 million point grid integrating to the wall. It was found that all three cases compared favorably to data from inlet to impeller trailing edge, but the k- and k- computations had disparate results beyond the trailing edge and into the vaneless diffuser. A large region of reversed flow was observed in the k- computations which extended from 70 to 100 percent span at the exit rating plane, whereas the k- computation had reversed flow from 95 to 100 percent span. Compared to experimental data at near-peak-efficiency, the reversed flow region in the k- case resulted in an underprediction in adiabatic efficiency of 8.3 points, whereas the k- case was 1.2 points lower in efficiency.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-216566 , AIAA Paper 2013-3631 , E-18754 , GRC-E-DAA-TN9986 , Joint Propulsion Conference and Exhibit; Jul 14, 2013 - Jul 17, 2013; San Jose, CA; United States
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  • 3
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    Computational Study of the CC3 Impeller and Vaneless Diffuser Experiment (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Centrifugal compressors are compatible with the low exit corrected flows found in the high pressure compressor of turboshaft engines and may play an increasing role in turbofan engines as engine overall pressure ratios increase. Centrifugal compressor stages are difficult to model accurately with RANS CFD solvers. A computational study of the CC3 centrifugal impeller in its vaneless diffuser configuration was undertaken as part of an effort to understand potential causes of RANS CFD mis-prediction in these types of geometries. Three steady, periodic cases of the impeller and diffuser were modeled using the TURBO Parallel Version 4 code: 1) a k-epsilon turbulence model computation on a 6.8 million point grid using wall functions, 2) a k-epsilon turbulence model computation on a 14 million point grid integrating to the wall, and 3) a k-omega turbulence model computation on the 14 million point grid integrating to the wall. It was found that all three cases compared favorably to data from inlet to impeller trailing edge, but the k-epsilon and k-omega computations had disparate results beyond the trailing edge and into the vaneless diffuser. A large region of reversed flow was observed in the k-epsilon computations which extended from 70% to 100% span at the exit rating plane, whereas the k-omega computation had reversed flow from 95% to 100% span. Compared to experimental data at near-peak-efficiency, the reversed flow region in the k-epsilon case resulted in an under-prediction in adiabatic efficiency of 8.3 points, whereas the k-omega case was 1.2 points lower in efficiency.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-216566 , E-18754 , GRC-E-DAA-TN9986 , AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit; Jul 15, 2013 - Jul 17, 2013; San Jose, CA; United States|International Energy Conversion Engineering Conference; Jul 15, 2013 - Jul 17, 2013; San Jose, CA; United States
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  • 4
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    NASA Fixed Wing Project Propulsion Research and Technology Development Activities to Reduce Thrust Specific Energy Consumption (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: This paper presents an overview of the propulsion research and technology portfolio of NASA Fundamental Aeronautics Program Fixed Wing Project. The research is aimed at significantly reducing the thrust specific fuel/energy consumption of notional advanced fixed wing aircraft (by 60 % relative to a baseline Boeing 737-800 aircraft with CFM56-7B engines) in the 2030-2035 time frame. The research investments described herein are aimed at improving propulsive efficiency through higher bypass ratio fans, improving thermal efficiency through compact high overall pressure ratio gas generators, and exploring the potential benefits of boundary layer ingestion propulsion and hybrid gas-electric propulsion concepts.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-216548 , E-18727 , GRC-E-DAA-TN10096 , International Energy Conversion Engineering Conference; Jul 15, 2013 - Jul 17, 2013; San Jose, CA; United States|AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit; Jul 15, 2013 - Jul 17, 2013; San Jose, CA; United States
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  • 5
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    Revolutionary Aeropropulsion Concept for Sustainable Aviation: Turboelectric Distributed Propulsion (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: In response to growing aviation demands and concerns about the environment and energy usage, a team at NASA proposed and examined a revolutionary aeropropulsion concept, a turboelectric distributed propulsion system, which employs multiple electric motor-driven propulsors that are distributed on a large transport vehicle. The power to drive these electric propulsors is generated by separately located gas-turbine-driven electric generators on the airframe. This arrangement enables the use of many small-distributed propulsors, allowing a very high effective bypass ratio, while retaining the superior efficiency of large core engines, which are physically separated but connected to the propulsors through electric power lines. Because of the physical separation of propulsors from power generating devices, a new class of vehicles with unprecedented performance employing such revolutionary propulsion system is possible in vehicle design. One such vehicle currently being investigated by NASA is called the "N3-X" that uses a hybrid-wing-body for an airframe and superconducting generators, motors, and transmission lines for its propulsion system. On the N3-X these new degrees of design freedom are used (1) to place two large turboshaft engines driving generators in freestream conditions to minimize total pressure losses and (2) to embed a broad continuous array of 14 motor-driven fans on the upper surface of the aircraft near the trailing edge of the hybrid-wing-body airframe to maximize propulsive efficiency by ingesting thick airframe boundary layer flow. Through a system analysis in engine cycle and weight estimation, it was determined that the N3-X would be able to achieve a reduction of 70% or 72% (depending on the cooling system) in energy usage relative to the reference aircraft, a Boeing 777-200LR. Since the high-power electric system is used in its propulsion system, a study of the electric power distribution system was performed to identify critical dynamic and safety issues. This paper presents some of the features and issues associated with the turboelectric distributed propulsion system and summarizes the recent study results, including the high electric power distribution, in the analysis of the N3-X vehicle.
    Keywords: Aircraft Propulsion and Power
    Type: ISABEý-2013-1719 , E-18689 , 2013 International Society for Air Breathing Engines; Sep 09, 2013 - Sep 13, 2013; Busan; Korea, Republic of
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  • 6
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    Integrated Tools for Future Distributed Engine Control Technologies (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Turbine engines are highly complex mechanical systems that are becoming increasingly dependent on control technologies to achieve system performance and safety metrics. However, the contribution of controls to these measurable system objectives is difficult to quantify due to a lack of tools capable of informing the decision makers. This shortcoming hinders technology insertion in the engine design process. NASA Glenn Research Center is developing a Hardware-inthe- Loop (HIL) platform and analysis tool set that will serve as a focal point for new control technologies, especially those related to the hardware development and integration of distributed engine control. The HIL platform is intended to enable rapid and detailed evaluation of new engine control applications, from conceptual design through hardware development, in order to quantify their impact on engine systems. This paper discusses the complex interactions of the control system, within the context of the larger engine system, and how new control technologies are changing that paradigm. The conceptual design of the new HIL platform is then described as a primary tool to address those interactions and how it will help feed the insertion of new technologies into future engine systems.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-217883 , E-18694 , ASME Turbo Expo 2013; Jun 03, 2013 - Jun 07, 2013; San Antonio, TX; United States
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  • 7
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    CMC Technology Advancements for Gas Turbine Engine Applications (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: CMC research at NASA Glenn is focused on aircraft propulsion applications. The objective is to enable reduced engine emissions and fuel consumption for more environmentally friendly aircraft. Engine system studies show that incorporation of ceramic composites into turbine engines will enable significant reductions in emissions and fuel burn due to increased engine efficiency resulting from reduced cooling requirements for hot section components. This presentation will describe recent progress and challenges in developing fiber and matrix constituents for 2700 F CMC turbine applications. In addition, ongoing research in the development of durable environmental barrier coatings, ceramic joining integration technologies and life prediction methods for CMC engine components will be reviewed.
    Keywords: Aircraft Propulsion and Power
    Type: GRC-E-DAA-TN9702 , Pacific Rim Conference on Ceramic and Glass; Jun 02, 2013 - Jun 07, 2013; San Diego, CA; United States
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  • 8
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    Surface Temperature Measurements from a Stator Vane Doublet in a Turbine Engine Afterburner Flame using Ultra-Bright Cr-Doped GdAlO3 Thermographic Phosphor (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Luminescence-based surface temperature measurements from an ultra-bright Cr-doped GdAlO3 perovskite (GAP:Cr) coating were successfully conducted on an air-film-cooled stator vane doublet exposed to the afterburner flame of a J85 test engine at University of Tennessee Space Institute (UTSI). The objective of the testing at UTSI was to demonstrate that reliable thermal barrier coating (TBC) surface temperatures based on luminescence decay of a thermographic phosphor could be obtained from the surface of an actual engine component in an aggressive afterburner flame environment and to address the challenges of a highly radiant background and high velocity gases. A high-pressure turbine vane doublet from a Honeywell TECH7000 turbine engine was coated with a standard electron-beam physical vapor deposited (EB-PVD) 200-m-thick TBC composed of yttria-stabilized zirconia (YSZ) onto which a 25-m-thick GAP:Cr thermographic phosphor layer was deposited by EB-PVD. The ultra-bright broadband luminescence from the GAP:Cr thermographic phosphor is shown to offer the advantage of over an order-of-magnitude greater emission intensity compared to rare-earth-doped phosphors in the engine test environment. This higher emission intensity was shown to be very desirable for overcoming the necessarily restricted probe light collection solid angle and for achieving high signal-to-background levels. Luminescence-decay-based surface temperature measurements varied from 500 to over 1000C depending on engine operating conditions and level of air film cooling.
    Keywords: Aircraft Propulsion and Power
    Type: GRC-E-DAA-TN8877 , 59th International Instrumentation Symposium; May 13, 2013 - May 17, 2013; Cleveland, OH; United States
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  • 9
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    An Approach to Detect and Mitigate Ice Particle Accretion in Aircraft Engine Compression Systems (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The accretion of ice in the compression system of commercial gas turbine engines operating in high ice water content conditions is a safety issue being studied by the aviation sector. While most of the research focuses on the underlying physics of ice accretion and the meteorological conditions in which accretion can occur, a systems-level perspective on the topic lends itself to potential near-term operational improvements. This work focuses on developing an accurate and reliable algorithm for detecting the accretion of ice in the low pressure compressor of a generic 40,000 lbf thrust class engine. The algorithm uses only the two shaft speed sensors and works regardless of engine age, operating condition, and power level. In a 10,000-case Monte Carlo simulation, the detection approach was found to have excellent capability at determining ice accretion from sensor noise with detection occurring when ice blocks an average of 6.8 percent of the low pressure compressor area. Finally, an initial study highlights a potential mitigation strategy that uses the existing engine actuators to raise the temperature in the low pressure compressor in an effort to reduce the rate at which ice accretes.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-216525 , E-18686 , GT2013-95049 , GRC-E-DAA-TN7849 , ASME Turbo Expo 2013; Jun 03, 2013 - Jun 07, 2013; San Antonio, TX; United States
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  • 10
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    Validation of Helicopter Gear Condition Indicators Using Seeded Fault Tests (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A "seeded fault test" in support of a rotorcraft condition based maintenance program (CBM), is an experiment in which a component is tested with a known fault while health monitoring data is collected. These tests are performed at operating conditions comparable to operating conditions the component would be exposed to while installed on the aircraft. Performance of seeded fault tests is one method used to provide evidence that a Health Usage Monitoring System (HUMS) can replace current maintenance practices required for aircraft airworthiness. Actual in-service experience of the HUMS detecting a component fault is another validation method. This paper will discuss a hybrid validation approach that combines in service-data with seeded fault tests. For this approach, existing in-service HUMS flight data from a naturally occurring component fault will be used to define a component seeded fault test. An example, using spiral bevel gears as the targeted component, will be presented. Since the U.S. Army has begun to develop standards for using seeded fault tests for HUMS validation, the hybrid approach will be mapped to the steps defined within their Aeronautical Design Standard Handbook for CBM. This paper will step through their defined processes, and identify additional steps that may be required when using component test rig fault tests to demonstrate helicopter CI performance. The discussion within this paper will provide the reader with a better appreciation for the challenges faced when defining a seeded fault test for HUMS validation.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM2013-217872 , E-18669 , Joint Machinery Failure Prevention Technology (MFPT) 2013; May 13, 2013 - May 17, 2013; Cleveland, OH; United States|59th International Instrumentation Symposium (IIS); May 13, 2013 - May 17, 2013; Cleveland, OH; United States
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  • 11
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    Multi-Partner Experiment to Test Volcanic-Ash Ingestion by a Jet Engine (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A research team of U.S. Government agencies and engine manufacturers are designing an experiment to test volcanic-ash ingestion by a NASA owned F117 engine that was donated by the U.S. Air Force. The experiment is being conducted under the auspices of NASA s Vehicle Integrated Propulsion Research (VIPR) Program and will take place in early 2014 at Edwards AFB in California as an on-ground, on-wing test. The primary objectives are to determine the effect on the engine of several hours of exposure to low to moderate ash concentrations, currently proposed at 1 and 10 mg/m3 and to evaluate the capability of engine health management technologies for detecting these effects. A natural volcanic ash will be used that is representative of distal ash clouds many 100's to approximately 1000 km from a volcanic source i.e., the ash should be composed of fresh glassy particles a few tens of microns in size. The glassy ash particles are expected to soften and become less viscous when exposed to the high temperatures of the combustion chamber, then stick to the nozzle guide vanes of the high-pressure turbine. Numerous observations and measurements of the engine s performance and degradation will be made during the course of the experiment, including borescope and tear-down inspections. While not intended to be sufficient for rigorous certification of engine performance when ash is ingested, the experiment should provide useful information to aircraft manufacturers, airline operators, and military and civil regulators in their efforts to evaluate the range of risks that ash hazards pose to aviation.
    Keywords: Aircraft Propulsion and Power
    Type: GRC-E-DAA-TN8284 , 6th International Workshop on Volcanic Ash; Mar 11, 2013 - Mar 15, 2013; Citeko; Indonesia
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  • 12
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    Integrating Condition Indicators and Usage Parameters for Improved Spiral Bevel Gear Health Monitoring (2013)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The objective of this study was to illustrate the importance of combining Health Usage Monitoring Systems (HUMS) data with usage monitoring system data when detecting rotorcraft transmission health. Six gear sets were tested in the NASA Glenn Spiral Bevel Gear Fatigue Rig. Damage was initiated and progressed on the gear and pinion teeth. Damage progression was measured by debris generation and documented with inspection photos at varying torque values. A contact fatigue analysis was applied to the gear design indicating the effect temperature, load and reliability had on gear life. Results of this study illustrated the benefits of combining HUMS data and actual usage data to indicate progression of damage for spiral bevel gears.
    Keywords: Aircraft Propulsion and Power
    Type: E-18665 , American Helicopter Society 69th Annual Forum; May 21, 2013 - May 23, 2013; Phoenix, AZ; United States
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  • 13
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    Gear Design Effects on the Performance of High Speed Helical Gear Trains as Used in Aerospace Drive Systems (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The performance of high-speed helical gear trains is of particular importance for tiltrotor aircraft drive systems. These drive systems are used to provide speed reduction/torque multiplication from the gas turbine output shaft and provide the necessary offset between these parallel shafts in the aircraft. Four different design configurations have been tested in the NASA Glenn Research Center, High Speed Helical Gear Train Test Facility. The design configurations included the current aircraft design, current design with isotropic superfinished gear surfaces, double helical design (inward and outward pumping), increased pitch (finer teeth), and an increased helix angle. All designs were tested at multiple input shaft speeds (up to 15,000 rpm) and applied power (up to 5,000 hp). Also two lubrication, system-related, variables were tested: oil inlet temperature (160 to 250 F) and lubricating jet pressure (60 to 80 psig). Experimental data recorded from these tests included power loss of the helical system under study, the temperature increase of the lubricant from inlet to outlet of the drive system and fling off temperatures (radially and axially). Also, all gear systems were tested with and without shrouds around the gears. The empirical data resulting from this study will be useful to the design of future helical gear train systems anticipated for next generation rotorcraft drive systems.
    Keywords: Aircraft Propulsion and Power
    Type: E-18652 , American Helicopter Society 69th Annual Forum; May 21, 2013 - May 23, 2013; Phoenix, AZ; United States
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  • 14
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    The Influence of Unsteadiness on the Analysis of Pressure Gain Combustion Devices (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Pressure gain combustion (PGC) has been the object of scientific study for over a century due to its promise of improved thermodynamic efficiency. In many recent application concepts PGC is utilized as a component in an otherwise continuous, normally steady flow system, such as a gas turbine or ram jet engine. However, PGC is inherently unsteady. Failure to account for the effects of this periodic unsteadiness can lead to misunderstanding and errors in performance calculations. This paper seeks to provide some clarity by presenting a consistent method of thermodynamic cycle analysis for a device utilizing PGC technology. The incorporation of the unsteady PGC process into the conservation equations for a continuous flow device is presented. Most importantly, the appropriate method for computing the conservation of momentum is presented. It will be shown that proper, consistent analysis of cyclic conservation principles produces representative performance predictions.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-217831 , AIAA Paper 2013-0280 , E-18582 , 51st Aerospace Science Conference; Jan 07, 2013 - Jan 10, 2013; Grapevine, TX; United States
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  • 15
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    Temperature and Species Measurements of Combustion Produced by a 9-Point Lean Direct Injector (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: This paper presents measurements of temperature and relative species concentrations in the combustion flowfield of a 9-point swirl venturi lean direct injector fueled with JP-8. The temperature and relative species concentrations of the flame produced by the injector were measured using spontaneous Raman scattering (SRS). Results of measurements taken at four flame conditions are presented. The species concentrations reported are measured relative to nitrogen and include oxygen, carbon dioxide, and water.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-217830 , AIAA Paper 2013-0562 , E-18581 , 51st Aerospace Sciences Meeting; Jan 07, 2013 - Jan 10, 2013; Grapevine, TX; United States
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  • 16
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    Propulsion Technologies for Future Commercial Aircraft (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Mr. Follen has been invited talk on subject of Greening of Aerospace and Aviation Canada-Ohio Aerospace Summit 2013, February 25-26, 2013. This two-day, bi-national aerospace and aviation conference will focus on identifying business and research opportunities providing meaningful industry updates with ample opportunity to network and scheduled business-to-business and researcher-to-researcher meetings.
    Keywords: Aircraft Propulsion and Power
    Type: GRC-E-DAA-TN8074 , Canada-Ohio Aerospace Summit 2013; Feb 25, 2013 - Feb 26, 2013; Cleveland, OH; United States
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  • 17
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    Simulating Effects of High Angle of Attack on Turbofan Engine Performance (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A method of investigating the effects of high angle of attack (AOA) flight on turbofan engine performance is presented. The methodology involves combining a suite of diverse simulation tools. Three-dimensional, steady-state computational fluid dynamics (CFD) software is used to model the change in performance of a commercial aircraft-type inlet and fan geometry due to various levels of AOA. Parallel compressor theory is then applied to assimilate the CFD data with a zero-dimensional, nonlinear, dynamic turbofan engine model. The combined model shows that high AOA operation degrades fan performance and, thus, negatively impacts compressor stability margins and engine thrust. In addition, the engine response to high AOA conditions is shown to be highly dependent upon the type of control system employed.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-217846 , AIAA Paper 2013-1075 , E-18622 , 51st Aerospace Sciences Meeting; Jan 07, 2013 - Jan 10, 2013; Grapevine, TX; United States
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  • 18
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    Simulating the Use of Alternative Fuels in a Turbofan Engine (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: The interest in alternative fuels for aviation has created a need to evaluate their effect on engine performance. The use of dynamic turbofan engine simulations enables the comparative modeling of the performance of these fuels on a realistic test bed in terms of dynamic response and control compared to traditional fuels. The analysis of overall engine performance and response characteristics can lead to a determination of the practicality of using specific alternative fuels in commercial aircraft. This paper describes a procedure to model the use of alternative fuels in a large commercial turbofan engine, and quantifies their effects on engine and vehicle performance. In addition, the modeling effort notionally demonstrates that engine performance may be maintained by modifying engine control system software parameters to account for the alternative fuel.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-216547 , E-18731 , GRC-E-DAA-TN10044
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  • 19
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    Combined Cycle Engine Large-Scale Inlet for Mode Transition Experiments: System Identification Rack Hardware Design (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: The System Identification (SysID) Rack is a real-time hardware-in-the-loop data acquisition (DAQ) and control instrument rack that was designed and built to support inlet testing in the NASA Glenn Research Center 10- by 10-Foot Supersonic Wind Tunnel. This instrument rack is used to support experiments on the Combined-Cycle Engine Large-Scale Inlet for Mode Transition Experiment (CCE LIMX). The CCELIMX is a testbed for an integrated dual flow-path inlet configuration with the two flow paths in an over-and-under arrangement such that the high-speed flow path is located below the lowspeed flow path. The CCELIMX includes multiple actuators that are designed to redirect airflow from one flow path to the other; this action is referred to as "inlet mode transition." Multiple phases of experiments have been planned to support research that investigates inlet mode transition: inlet characterization (Phase-1) and system identification (Phase-2). The SysID Rack hardware design met the following requirements to support Phase-1 and Phase-2 experiments: safely and effectively move multiple actuators individually or synchronously; sample and save effector control and position sensor feedback signals; automate control of actuator positioning based on a mode transition schedule; sample and save pressure sensor signals; and perform DAQ and control processes operating at 2.5 KHz. This document describes the hardware components used to build the SysID Rack including their function, specifications, and system interface. Furthermore, provided in this document are a SysID Rack effectors signal list (signal flow); system identification experiment setup; illustrations indicating a typical SysID Rack experiment; and a SysID Rack performance overview for Phase-1 and Phase-2 experiments. The SysID Rack described in this document was a useful tool to meet the project objectives.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-217864 , E-18657
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  • 20
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    Comprehensive Modeling and Analysis of Rotorcraft Variable Speed Propulsion System With Coupled Engine/Transmission/Rotor Dynamics (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: This project develops comprehensive modeling and simulation tools for analysis of variable rotor speed helicopter propulsion system dynamics. The Comprehensive Variable-Speed Rotorcraft Propulsion Modeling (CVSRPM) tool developed in this research is used to investigate coupled rotor/engine/fuel control/gearbox/shaft/clutch/flight control system dynamic interactions for several variable rotor speed mission scenarios. In this investigation, a prototypical two-speed Dual-Clutch Transmission (DCT) is proposed and designed to achieve 50 percent rotor speed variation. The comprehensive modeling tool developed in this study is utilized to analyze the two-speed shift response of both a conventional single rotor helicopter and a tiltrotor drive system. In the tiltrotor system, both a Parallel Shift Control (PSC) strategy and a Sequential Shift Control (SSC) strategy for constant and variable forward speed mission profiles are analyzed. Under the PSC strategy, selecting clutch shift-rate results in a design tradeoff between transient engine surge margins and clutch frictional power dissipation. In the case of SSC, clutch power dissipation is drastically reduced in exchange for the necessity to disengage one engine at a time which requires a multi-DCT drive system topology. In addition to comprehensive simulations, several sections are dedicated to detailed analysis of driveline subsystem components under variable speed operation. In particular an aeroelastic simulation of a stiff in-plane rotor using nonlinear quasi-steady blade element theory was conducted to investigate variable speed rotor dynamics. It was found that 2/rev and 4/rev flap and lag vibrations were significant during resonance crossings with 4/rev lagwise loads being directly transferred into drive-system torque disturbances. To capture the clutch engagement dynamics, a nonlinear stick-slip clutch torque model is developed. Also, a transient gas-turbine engine model based on first principles mean-line compressor and turbine approximations is developed. Finally an analysis of high frequency gear dynamics including the effect of tooth mesh stiffness variation under variable speed operation is conducted including experimental validation. Through exploring the interactions between the various subsystems, this investigation provides important insights into the continuing development of variable-speed rotorcraft propulsion systems.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/CR-2013-216502 , E-18646 , GRC-E-DAA-TN7924
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    Advanced Shock Position Control for Mode Transition in a Turbine Based Combined Cycle Engine Inlet Model (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: A dual flow-path inlet system is being tested to evaluate methodologies for a Turbine Based Combined Cycle (TBCC) propulsion system to perform a controlled inlet mode transition. Prior to experimental testing, simulation models are used to test, debug, and validate potential control algorithms. One simulation package being used for testing is the High Mach Transient Engine Cycle Code simulation, known as HiTECC. This paper discusses the closed loop control system, which utilizes a shock location sensor to improve inlet performance and operability. Even though the shock location feedback has a coarse resolution, the feedback allows for a reduction in steady state error and, in some cases, better performance than with previous proposed pressure ratio based methods. This paper demonstrates the design and benefit with the implementation of a proportional-integral controller, an H-Infinity based controller, and a disturbance observer based controller.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-216515 , E-18676 , GRC-E-DAA-TN8528
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    Jet fuel based high pressure solid oxide fuel cell system (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: A power system for an aircraft includes a solid oxide fuel cell system which generates electric power for the aircraft and an exhaust stream; and a heat exchanger for transferring heat from the exhaust stream of the solid oxide fuel cell to a heat requiring system or component of the aircraft. The heat can be transferred to fuel for the primary engine of the aircraft. Further, the same fuel can be used to power both the primary engine and the SOFC. A heat exchanger is positioned to cool reformate before feeding to the fuel cell. SOFC exhaust is treated and used as inerting gas. Finally, oxidant to the SOFC can be obtained from the aircraft cabin, or exterior, or both.
    Keywords: Aircraft Propulsion and Power
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    Aircraft Turbine Engine Control Research at NASA Glenn Research Center (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: This paper provides an overview of the aircraft turbine engine control research at the NASA Glenn Research Center (GRC). A brief introduction to the engine control problem is first provided with a description of the state-of-the-art control law structure. A historical aspect of engine control development since the 1940s is then provided with a special emphasis on the contributions of GRC. With the increased emphasis on aircraft safety, enhanced performance, and affordability, as well as the need to reduce the environmental impact of aircraft, there are many new challenges being faced by the designers of aircraft propulsion systems. The Controls and Dynamics Branch (CDB) at GRC is leading and participating in various projects to develop advanced propulsion controls and diagnostics technologies that will help meet the challenging goals of NASA Aeronautics Research Mission programs. The rest of the paper provides an overview of the various CDB technology development activities in aircraft engine control and diagnostics, both current and some accomplished in the recent past. The motivation for each of the research efforts, the research approach, technical challenges, and the key progress to date are summarized.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-217821 , E-18277-1
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    Shock Position Control for Mode Transition in a Turbine Based Combined Cycle Engine Inlet Model (2013)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: A dual flow-path inlet for a turbine based combined cycle (TBCC) propulsion system is to be tested in order to evaluate methodologies for performing a controlled inlet mode transition. Prior to experimental testing, simulation models are used to test, debug, and validate potential control algorithms which are designed to maintain shock position during inlet disturbances. One simulation package being used for testing is the High Mach Transient Engine Cycle Code simulation, known as HiTECC. This paper discusses the development of a mode transition schedule for the HiTECC simulation that is analogous to the development of inlet performance maps. Inlet performance maps, derived through experimental means, describe the performance and operability of the inlet as the splitter closes, switching power production from the turbine engine to the Dual Mode Scram Jet. With knowledge of the operability and performance tradeoffs, a closed loop system can be designed to optimize the performance of the inlet. This paper demonstrates the design of the closed loop control system and benefit with the implementation of a Proportional-Integral controller, an H-Infinity based controller, and a disturbance observer based controller; all of which avoid inlet unstart during a mode transition with a simulated disturbance that would lead to inlet unstart without closed loop control.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-217824 , E-18574 , 27th Propulsion Hazards Joint Subcommittee Meeting; Dec 03, 2012 - Dec 17, 2012; Monterey, CA; United States|33rd Exhaust Plume and Signatures Joint Subcommittee Meeting; Dec 03, 2012 - Dec 17, 2012; Monterey, CA; United States|45th Combustion/33rd Airbreathing Propulsion Joint Subcommittee Meeting; Dec 03, 2012 - Dec 07, 2012; Monterey, CA; United States|33rd Airbreathing Propulsion Joint Subcommittee Meeting; Dec 03, 2012 - Dec 07, 2012; Monterey, CA; United States
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    Optimized tuner selection for engine performance estimation (2013)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A methodology for minimizing the error in on-line Kalman filter-based aircraft engine performance estimation applications is presented. This technique specifically addresses the underdetermined estimation problem, where there are more unknown parameters than available sensor measurements. A systematic approach is applied to produce a model tuning parameter vector of appropriate dimension to enable estimation by a Kalman filter, while minimizing the estimation error in the parameters of interest. Tuning parameter selection is performed using a multi-variable iterative search routine which seeks to minimize the theoretical mean-squared estimation error. Theoretical Kalman filter estimation error bias and variance values are derived at steady-state operating conditions, and the tuner selection routine is applied to minimize these values. The new methodology yields an improvement in on-line engine performance estimation accuracy.
    Keywords: Aircraft Propulsion and Power
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    Integrating Condition Indicators and Usage Parameters for Improved Spiral Bevel Gear Health Monitoring (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The objective of this study was to illustrate the importance of combining Health Usage Monitoring Systems (HUMS) data with usage monitoring system data when detecting rotorcraft transmission health. Three gear sets were tested in the NASA Glenn Spiral Bevel Gear Fatigue Rig. Damage was initiated and progressed on the gear and pinion teeth. Damage progression was measured by debris generation and documented with inspection photos at varying torque values. A contact fatigue analysis was applied to the gear design indicating the effect temperature, load and reliability had on gear life. Results of this study illustrated the benefits of combining HUMS data and actual usage data to indicate progression of damage for spiral bevel gears.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-217896 , E-18665-1 , AHS International Annual Forum and Technology Display; May 21, 2013 - May 23, 2013; Phoenix, AZ; United States
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    Aeromechanics Analysis of a Boundary Layer Ingesting Fan (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Boundary layer ingesting propulsion systems have the potential to significantly reduce fuel burn but these systems must overcome the challe nges related to aeromechanics-fan flutter stability and forced response dynamic stresses. High-fidelity computational analysis of the fan a eromechanics is integral to the ongoing effort to design a boundary layer ingesting inlet and fan for fabrication and wind-tunnel test. A t hree-dimensional, time-accurate, Reynolds-averaged Navier Stokes computational fluid dynamics code is used to study aerothermodynamic and a eromechanical behavior of the fan in response to both clean and distorted inflows. The computational aeromechanics analyses performed in th is study show an intermediate design iteration of the fan to be flutter-free at the design conditions analyzed with both clean and distorte d in-flows. Dynamic stresses from forced response have been calculated for the design rotational speed. Additional work is ongoing to expan d the analyses to off-design conditions, and for on-resonance conditions.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-217730 , AIAA Paper 2012-3995 , E-18442 , 48th Joint Propulsion Conference and Exhibit; Jul 30, 2012 - Aug 01, 2012; Atlanta, GA; United States
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    Vehicle Integrated Propulsion Research Tests (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Overview of the Vehicle Integrated Propulsion Research Tests in the Vehicle Systems Safety Technologies project. This overview covers highlights of the completed VIPR I and VIPR II tests and also covers plans for the VIPR III test.
    Keywords: Aircraft Propulsion and Power
    Type: GRC-E-DAA-TN12327 , NASA GRC Propulsion Control and Diagnostics (PCD) Workshop; Dec 11, 2013 - Dec 12, 2013; Cleveland, Ohio; United States
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    Model-Based Control of a Nonlinear Aircraft Engine Simulation using an Optimal Tuner Kalman Filter Approach (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: This paper covers the development of a model-based engine control (MBEC) methodology featuring a self tuning on-board model applied to an aircraft turbofan engine simulation. Here, the Commercial Modular Aero-Propulsion System Simulation 40,000 (CMAPSS40k) serves as the MBEC application engine. CMAPSS40k is capable of modeling realistic engine performance, allowing for a verification of the MBEC over a wide range of operating points. The on-board model is a piece-wise linear model derived from CMAPSS40k and updated using an optimal tuner Kalman Filter (OTKF) estimation routine, which enables the on-board model to self-tune to account for engine performance variations. The focus here is on developing a methodology for MBEC with direct control of estimated parameters of interest such as thrust and stall margins. Investigations using the MBEC to provide a stall margin limit for the controller protection logic are presented that could provide benefits over a simple acceleration schedule that is currently used in traditional engine control architectures.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-216551 , E-18730 , GRC-E-DAA-TN10141 , Joint Propulsion Conference & Exhibit; Jul 14, 2013 - Jul 17, 2013; San Jose, CA; United States
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    NASA Collaborative Research on the Ultra High Bypass Engine Cycle and Potential Benefits for Noise, Performance, and Emissions (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The National Aeronautics and Space Administration has taken an active role in collaborative research with the U.S. aerospace industry to investigate technologies to minimize the impact of aviation on the environment. In December 2006, a new program, called the Fundamental Aeronautics Program, was established to enhance U.S. aeronautics technology and conduct research on energy, efficiency and the environment. A project within the overall program, the Subsonic Fixed Wing Project, was formed to focus on research related to subsonic aircraft with specific goals and time based milestones to reduce aircraft noise, emissions and fuel burn. This paper will present an overview of the Subsonic Fixed Wing Project environmental goals and describe a segment of the current research within NASA and also were worked collaboratively with partners from the U.S. aerospace industry related to the next generation of aircraft that will have lower noise, emissions and fuel burn.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-216345 , ISABE-2009-1274 , E-17282 , International Symposium on Air Breathing Engines (ISABE 2009); Sep 07, 2009 - Sep 11, 2009; Montreal, Quebec; Canada
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    Aircraft Engine Gas Path Diagnostic Methods: Public Benchmarking Results (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Recent technology reviews have identified the need for objective assessments of aircraft engine health management (EHM) technologies. To help address this issue, a gas path diagnostic benchmark problem has been created and made publicly available. This software tool, referred to as the Propulsion Diagnostic Method Evaluation Strategy (ProDiMES), has been constructed based on feedback provided by the aircraft EHM community. It provides a standard benchmark problem enabling users to develop, evaluate and compare diagnostic methods. This paper will present an overview of ProDiMES along with a description of four gas path diagnostic methods developed and applied to the problem. These methods, which include analytical and empirical diagnostic techniques, will be described and associated blind-test-case metric results will be presented and compared. Lessons learned along with recommendations for improving the public benchmarking processes will also be presented and discussed.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-218082 , GT2013-95077 , E-18768 , American Society of Mechanical Engineers (ASME) Turbo Expo 2013; Jun 03, 2013 - Jun 07, 2013; San Antonio Texas; United States
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    Aircraft Engine Technology for Green Aviation to Reduce Fuel Burn (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The NASA Fundamental Aeronautics Program Subsonic Fixed Wing Project and Integrated Systems Research Program Environmentally Responsible Aviation Project in the Aeronautics Research Mission Directorate are conducting research on advanced aircraft technology to address the environmental goals of reducing fuel burn, noise and NOx emissions for aircraft in 2020 and beyond. Both Projects, in collaborative partnerships with U.S. Industry, Academia, and other Government Agencies, have made significant progress toward reaching the N+2 (2020) and N+3 (beyond 2025) installed fuel burn goals by fundamental aircraft engine technology development, subscale component experimental investigations, full scale integrated systems validation testing, and development validation of state of the art computation design and analysis codes. Specific areas of propulsion technology research are discussed and progress to date.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-217690 , AIAA Paper 2011-3531 , E-18373 , Atmospheric and Space Environments Conference; Jun 27, 2011 - Jun 30, 2011; Honolulu, HI; United States
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    Benefits of Hybrid-Electric Propulsion to Achieve 4x Increase in Cruise Efficiency for a VTOL Aircraft (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Electric propulsion enables radical new vehicle concepts, particularly for Vertical Takeoff and Landing (VTOL) aircraft because of their significant mismatch between takeoff and cruise power conditions. However, electric propulsion does not merely provide the ability to normalize the power required across the phases of flight, in the way that automobiles also use hybrid electric technologies. The ability to distribute the thrust across the airframe, without mechanical complexity and with a scale-free propulsion system, is a new degree of freedom for aircraft designers. Electric propulsion is scale-free in terms of being able to achieve highly similar levels of motor power to weight and efficiency across a dramatic scaling range. Applying these combined principles of electric propulsion across a VTOL aircraft permits an improvement in aerodynamic efficiency that is approximately four times the state of the art of conventional helicopter configurations. Helicopters typically achieve a lift to drag ratio (L/D) of between 4 and 5, while the VTOL aircraft designed and developed in this research were designed to achieve an L/D of approximately 20. Fundamentally, the ability to eliminate the problem of advancing and retreating rotor blades is shown, without resorting to unacceptable prior solutions such as tail-sitters. This combination of concept and technology also enables a four times increase in range and endurance while maintaining the full VTOL and hover capability provided by a helicopter. Also important is the ability to achieve low disc-loading for low ground impingement velocities, low noise and hover power minimization (thus reducing energy consumption in VTOL phases). This combination of low noise and electric propulsion (i.e. zero emissions) will produce a much more community-friendly class of vehicles. This research provides a review of the concept brainstorming, configuration aerodynamic and mission analysis, as well as subscale prototype construction and flight testing that verifies transition flight control. A final down-selected vehicle is also presented.
    Keywords: Aircraft Propulsion and Power
    Type: AIAA Paper 2012-4324 , NF1676L-16092 , AIAA Aviation Technology, Integration, and Operations (ATIO) Conference; Aug 12, 2013 - Aug 14, 2013; Los Angeles, CA; United States
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    Comparing a Fischer-Tropsch Alternate Fuel to JP-8 and Their 50-50 Blend: Flow and Flame Visualization Results (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Combustion performance of a Fischer-Tropsch (FT) jet fuel manufactured by Sasol was compared to JP-8 and a 50-50 blend of the two fuels, using the NASA/Woodward 9 point Lean Direct Injector (LDI) in its baseline configuration. The baseline LDI configuration uses 60deg axial air-swirlers, whose vanes generate clockwise swirl, in the streamwise sense. For all cases, the fuel-air equivalence ratio was 0.455, and the combustor inlet pressure and pressure drop were 10-bar and 4 percent. The three inlet temperatures used were 828, 728, and 617 K. The objectives of this experiment were to visually compare JP-8 flames with FT flames for gross features. Specifically, we sought to ascertain in a simple way visible luminosity, sooting, and primary flame length of the FT compared to a standard JP grade fuel. We used color video imaging and high-speed imaging to achieve these goals. The flame color provided a way to qualitatively compare soot formation. The length of the luminous signal measured using the high speed camera allowed an assessment of primary flame length. It was determined that the shortest flames resulted from the FT fuel.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-217884 , E-18695 , 2012 Central States Section of the Combustion Institute Spring Technical Meeting; Apr 22, 2012 - Apr 24, 2012; Dayton, OH; United States
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    Evaluation of a Microwave Blade Tip Clearance Sensor for Propulsion Health Monitoring (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The NASA Glenn Research Center has investigated a microwave blade tip clearance system for the structural health monitoring of gas turbine engines. This presentation describes the sensors and the experiments that have been conducted to evaluate their performance along with future plans for their use on an engine ground test.
    Keywords: Aircraft Propulsion and Power
    Type: GRC-E-DAA-9387 , ISA International Instrumentation Symposium; May 13, 2013 - May 17, 2013; Cleveland, OH; United States
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    Temperature Measurements of Thermal Barrier Coating Surfaces Using a Cr-Doped GdAlO3 Thermographic Phosphor (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: No abstract available
    Keywords: Aircraft Propulsion and Power
    Type: GRC-E-DAA-TN13236 , International Conference on Advanced Ceramics and Composites (ICACC''14); Jan 25, 2014 - Jan 30, 2014; Daytona Beach, FL; United States
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    The Aerodynamic Performance of an Over-the-Rotor Liner With Circumferential Grooves on a High Bypass Ratio Turbofan Rotor (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: While liners have been utilized throughout turbofan ducts to attenuate fan noise, additional attenuation is obtainable by placing an acoustic liner over-the-rotor. Previous experiments have shown significant fan performance losses when acoustic liners are installed over-the-rotor. The fan blades induce an oscillating flow in the acoustic liners which results in a performance loss near the blade tip. An over-the-rotor liner was designed with circumferential grooves between the fan blade tips and the acoustic liner to reduce the oscillating flow in the acoustic liner. An experiment was conducted in the W-8 Single-Stage Axial Compressor Facility at NASA Glenn Research Center on a 1.5 pressure ratio fan to evaluate the impact of this over-the-rotor treatment design on fan aerodynamic performance. The addition of a circumferentially grooved over-the-rotor design between the fan blades and the acoustic liner reduced the performance loss, in terms of fan adiabatic efficiency, to less than 1 percent which is within the repeatability of this experiment.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-218066 , GT2013-95114 , E-18742 , ASME Turbo Expo 2013; Jun 03, 2013 - Jun 07, 2013; San Antonio, TX; United States
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    The Aerodynamic Performance of an Over-The-Rotor Liner with Circumferential Grooves on a High Bypass Ratio Turbofan Rotor (2013)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: While liners have been utilized throughout turbofan ducts to attenuate fan noise, additional attenuation is obtainable by placing an acoustic liner over-the-rotor. Previous experiments have shown significant fan performance losses when acoustic liners are installed over-the-rotor. The fan blades induce an oscillating flow in the acoustic liners which results in a performance loss near the blade tip. An over-the-rotor liner was designed with circumferential grooves between the fan blade tips and the acoustic liner to reduce the oscillating flow in the acoustic liner. An experiment was conducted in the W-8 Single-Stage Axial Compressor Facility at NASA Glenn Research Center on a 1.5 pressure ratio fan to evaluate the impact of this over-the-rotor treatment design on fan aerodynamic performance. The addition of a circumferentially grooved over-the-rotor design between the fan blades and the acoustic liner reduced the performance loss, in terms of fan adiabatic efficiency, to less than 1% which is within the repeatability of this experiment.
    Keywords: Aircraft Propulsion and Power
    Type: GT2013-95114 , E-18742-1 , ASME Turbo Exp 2013; Jun 03, 2013 - Jun 07, 2013; San Antonio, TX; United States
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    Advanced Single-Aisle Transport Propulsion Design Options Revisited (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Future propulsion options for advanced single-aisle transports have been investigated in a number of previous studies by the authors. These studies have examined the system level characteristics of aircraft incorporating ultra-high bypass ratio (UHB) turbofans (direct drive and geared) and open rotor engines. During the course of these prior studies, a number of potential refinements and enhancements to the analysis methodology and assumptions were identified. This paper revisits a previously conducted UHB turbofan fan pressure ratio trade study using updated analysis methodology and assumptions. The changes incorporated have decreased the optimum fan pressure ratio for minimum fuel consumption and reduced the engine design trade-offs between minimizing noise and minimizing fuel consumption. Nacelle drag and engine weight are found to be key drivers in determining the optimum fan pressure ratio from a fuel efficiency perspective. The revised noise analysis results in the study aircraft being 2 to 4 EPNdB (cumulative) quieter due to a variety of reasons explained in the paper. With equal core technology assumed, the geared engine architecture is found to be as good as or better than the direct drive architecture for most parameters investigated. However, the engine ultimately selected for a future advanced single-aisle aircraft will depend on factors beyond those considered here.
    Keywords: Aircraft Propulsion and Power
    Type: AIAA Paper 2013-4330 , NF1676L-16101 , AIAA Aviation Technology, Integration, and Operations (ATIO) Conference; Aug 12, 2013 - Aug 14, 2013; Los Angeles, CA; United States
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    Design and Demonstration of Emergency Control Modes for Enhanced Engine Performance (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A design concept is presented for developing control modes that enhance aircraft engine performance during emergency flight scenarios. The benefits of increased engine performance to overall vehicle survivability during these situations may outweigh the accompanied elevated risk of engine failure. The objective involves building control logic that can consistently increase engine performance beyond designed maximum levels based on an allowable heightened probability of failure. This concept is applied to two previously developed control modes: an overthrust mode that increases maximum engine thrust output and a faster response mode that improves thrust response to dynamic throttle commands. This paper describes the redesign of these control modes and presents simulation results demonstrating both enhanced engine performance and robust maintenance of the desired elevated risk level.
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-216552 , E-18729 , GRC-E-DAA-TN10088 , AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit; Jul 14, 2013 - Jul 17, 2013; San Jose, CA; United States
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    Flight Test Results of an Axisymmetric Channeled Center Body Supersonic Inlet at Off-Design Conditions (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Flight-testing of a channeled center-body axisymmetric supersonic inlet design concept was conducted at the National Aeronautics and Space Administration (NASA) Dryden Flight Research Center in collaboration with the NASA Glenn Research Center (Cleveland, Ohio) and TechLand Research, Inc. (North Olmsted, Ohio). This testing utilized the Propulsion Flight Test Fixture, flown on the NASA F-15B research test bed airplane (NASA tail number 836) at local experiment Mach numbers up to 1.50. The translating channeled center-body inlet was designed by TechLand Research, Inc. (U.S. Patent No. 6,276,632 B1) to allow for a novel method of off-design flow matching, with original test planning conducted under a NASA Small Business Innovative Research study. Data were collected in flight at various off-design Mach numbers for fixed-geometry representations of both the channeled center-body design and an equivalent area smooth center-body design for direct comparison of total pressure recovery and limited distortion measurements.
    Keywords: Aircraft Propulsion and Power
    Type: DFRC-E-DAA-TN9550 , AIAA/ASME/SAE/ASEE Joint Propulsion Conference; Jul 14, 2013 - Jul 17, 2013; San Jose, CA; United States
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    Investigation of Sideband Index Response to Prototype Gear Tooth Damage (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: The objective of this analysis was to evaluate the ability of gear condition indicators (CI) to detect contact fatigue damage on spiral bevel gear teeth. Tests were performed in the NASA Glenn Spiral Bevel Gear Fatigue Rig on eight prototype gear sets (pinion/gear). Damage was initiated and progressed on the gear and pinion teeth. Vibration data was measured during damage progression at varying torque values while varying damage modes to the gear teeth were observed and documented with inspection photos. Sideband indexes (SI) and root mean square (RMS) CIs were calculated from the time synchronous averaged vibration data. Results found that both CIs respond differently to varying torque levels, damage levels and damage modes
    Keywords: Aircraft Propulsion and Power
    Type: NASA/TM-2013-216610 , E-18805 , GRC-E-DAA-TN11557
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 43
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    System for Suppressing Vibration in Turbomachine Components (2013)
    In:  CASI
    Details
    Publication Date: 2019-08-26
    Description: Disclosed is a system for suppressing vibration and noise mitigation in structures such as blades in turbomachinery. The system includes flexible piezoelectric patches which are secured on or imbedded in turbomachinery blades which, in one embodiment, comprises eight (8) fan blades. The system further includes a capacitor plate coupler and a power transfer apparatus, which may both be arranged into one assembly, that respectively transfer data and power. Each of the capacitive plate coupler and power transfer apparatus is configured so that one part is attached to a fixed member while another part is attached to a rotatable member with an air gap there between. The system still further includes a processor that has 16 channels, eight of which serve as sensor channels, and the remaining eight, serving as actuation channels. The processor collects and analyzes the sensor signals and, in turn, outputs corrective signals for vibration/noise suppression of the turbine blades.
    Keywords: Aircraft Propulsion and Power
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    NASA TECHNICAL REPORTS
  • 44
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    Der Wärmeübergang im senkrechten VerdampferrohrGekürzte Fassung eines Vortrages, gehalten auf der Jahrestagung der VDI-Fachgruppe Verfahrenstechnik am 2. Okt. 1953 in Karlsruhe, vgl. diese Ztschr. 25, 684 [1953]. (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 25-28 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Es wird der Versuch unternommen, die Wärmeübergangszahl einer in einem senkrechten Verdampferrohr umlaufenden und siedenden Flüssigkeit in Abhängigkeit von den maßgebenden Einflüssen anzugeben. Zu diesem Zwecke wurden die Rohrwandtemperatur und die Flüssigkeitstemperatur im Rohr gemessen. Für die verwendeten Rohrabmessungen läßt sich die Wärmeübergangszahl durch eine einfache Potenzfunktion wiedergeben. Über sie wird im folgenden berichtet.Die Versuche wurden durchgeführt mit der dankenswerten Unterstützung des Vereins Deutscher Ingenieure durch Zuschüsse aus ERP-Mitteln, ferner der DECHEMA, Frankfurt a. M.; BASF, Ludwigshafen a. Rh.; B. Müller, Weidenau; C. Canzler, Düren, und Deutsche Forschungsgemeinschaft, Bad Godesberg.Meinen beiden Mitarbeitern Dipl.-Ing. R. Baumann und Dipl.-Ing. W. Busch danke ich für ihre Unterstützung bei der Durchführung und Auswertung der Versuche. Ferner waren mit den Versuchen beschäftigt die Herren cand. chem. ing. Hunke Schwarze, Boger, Canzler, Hummel, Ernst u. George.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260107
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  • 45
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    Gas- und Wasserdampf-Absorption hochsiedender Flüssigkeiten bei Drucken unter 10 TorrVortrag des erstgenannten Verfassers auf der Jahrestagung der VDI-Fachgruppe Verfahrenstechnik am 3. Okt. 1953 in Karlsruhe; vgl. diese Ztschr. 25, 685 [1953]. (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 9-13 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Die Verfahrenstechnik benutzt vielfach Methoden der Vakuumtechnik als Hilfsmittel. Ein Hauptproblem bei Verfahren im Druckgebiet unter 10 Torr ist der Transport großer Gas- und Dampfvolumina. Es wird eine Apparatur beschrieben, mit der man unter Ausnutzung dieser Tatsache sehr kleine Gasgehalte in Flüssigkeiten bestimmen kann.
    Additional Material: 10 Ill.
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    URL: http://dx.doi.org/10.1002/cite.330260104
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  • 46
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    Neue Anwendungen der ÄhnlichkeitstheorieVortrag auf der Jahrestagung der VDI-Fachgruppe für Verfahrenstechnik am 2. Oktober 1953 in Kaßlsruhe, vgl. diese Ztschr. 25, 689 [1953]. (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 18-24 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Es wird eine Auswahl neuer Anwendungen beschrieben, die sich auf die Theorie der Flammenfortpflanzung, auf rheologische Flüssigkeiten, die Strömung geschmolzenen Glases in der Schmelzwanne, die Bewegung des flüssigen Stahls im Konverter, den Einfluß pulsierender Strömung auf die Kohfenstaubverbrennung und die Heizgasströmung bei Eckenfeuerung beziehen. Am Beispiel des Gesetzes von Avogadro und des Wienschen Verschiebungsgesetzes wird schließlich gezeigt, daß die Bedeutung der Ähnlichkeitstheorie wesentlich tiefer als nur in der Anwendung liegt.
    Additional Material: 20 Ill.
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    URL: http://dx.doi.org/10.1002/cite.330260106
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  • 47
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    Umschau (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 51-55 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260113
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  • 48
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    Der Wärmetransport in flüssigen elektrischen Nichtleitern unter dem Einfluß elektrischer FelderGekürzte Fassung eines Vortrages des erstgenannten Autors auf der Jahrestagung der VDI-Fachgruppe Verfahrenstechnik am 3. Oktober 1953 in Karlsruhe, vgl. diese Ztschr. 25, 685 [1953]. Ausführliche Wiedergabe: Forsch. Geb. Ingenieurwes. 19, 65 [1953]. (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 35-38 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Es wurde die Wärmeleitzahl verschiedener Flüssigkeiten in einer näher beschriebenen Apparatur untersucht, in der gleichzeitig ein hohes elektrisches Feld angelegt werden konnte. Es zeigte sich, daß das Wärmeleitvermögen unter dem Einfluß des Gleichspannungsfeldes auf das 2- bis 5fache des normalen Wertes ansteigt. Wie Schlierenaufnahmen beweisen, wird dieser mit steigender Temperatur zunehmende Effekt durch Konvektionsbewegungen der Flüssigkeiten hervorgerufen.
    Additional Material: 15 Ill.
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    URL: http://dx.doi.org/10.1002/cite.330260109
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  • 49
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    Unfallverhütung (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 56-56 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260115
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  • 50
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    Vergleiche zwischen der Gaußschen Normalverteilung und der Verteilungsfunktion nach Rosin, Rammler und Sperling (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 72-74 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Technische Kornverteilungen werden meist mit Hilfe der Rosin-Rammler-Sperling-Gleichung in einem doppelt-logarithmisch geteilten Körnungsnetz dargestellt. Im folgenden wird gezeigt, daß diese Verteilungsfunktion unter bestimmten Bedingungen auch Normalverteilungen erfaßt. Diese Tatsache erweitert den Anwendungsbereich der RRS-Gleichung und läßt manche Darstellungen im Körnungsnetz sinnfälliger deuten.
    Additional Material: 5 Ill.
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    URL: http://dx.doi.org/10.1002/cite.330260203
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  • 51
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    Elektronische Stabilisierung der Gleichspannung zur Trennung von Substanzgemischen im elektrischen Feld (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 81-83 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Für elektrophoretische Trennungen von Substanzgemischen (Eiweißhydrolysaten, Gerbstoffgemischen) wurde ein Stromversorgungsgerät entwickelt, welches elektronisch - stabilisierte Gleichspannungen von 0 bis 1500 V liefert.
    Additional Material: 5 Ill.
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    URL: http://dx.doi.org/10.1002/cite.330260205
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  • 52
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    Der Transport von Gasen und Dämpfen in PapierVortrag auf der 8. wissenschaftlichen Arbeitstagung für Lebensmitteltechnologie und Verpackung am 23. September 1953 in München; vgl. diese Ztschr. 26, 49 [1954]. (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 90-94 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Der Transport von Gasen und Dämpfen in Papier wird unter Verwendung einer Strömungsmethode untersucht. Die für die Luftdurchlässigkeit maßgebenden Faktoren können auf bekannte Gesetze zurückgeführt werden, so daß man die Durchlässigkeit für jedes permanente Gas aus einer Messung der Luftdurchlässigkeit für einen beliebigen mittleren Druck berechnen kann.  -  Der Wasserdampftransport in Papier und Folien kann, sofern er nicht nach den bekannten Gesetzen durch das freie Porenvolumen vonstatten geht, unter Berücksichtigung von Adsorptionsisothermen quantitativ erfaßt werden. Aus den theoretischen und experimentellen Untersuchungen folgt, daß das Oberflächenkonzentrationsgefälle sowie die Oberflächenkonzentration selbst von maßgeblichem Einfluß sind. Es wird damit die Möglichkeit aufgezeigt, Aussagen über die Wasserdampfdurchlässigkeit unter allen praktisch vorkommenden klimatischen Bedingungen zu machen.
    Additional Material: 8 Ill.
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    URL: http://dx.doi.org/10.1002/cite.330260207
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  • 53
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    Gaszündpunkt und Tropfzündpunkt (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 97-100 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Außer der für die Selbstzündung von Gasen und Dämpfen maßgebenden Temperatur, dem „Gaszündpunkt“, findet man bei vielen brennbaren chemischen Substanzen noch einen  -  meist sehr viel niedriger liegenden  -  „Tropfzündpunkt“, bei dem sich die flüssige Phase der betreffenden Substanz beim Auftreffen auf eine heiße Fläche entzündet. Die Merkmale der beiden Zündpunkte werden einander gegenübergestellt und Folgerungen für explosionsgefährdete Räume gezogen; weiterhin wird eine empirische Formel für die Berechnung des Tropfzündpunktes in einzelnen chemischen Gruppen angegeben.
    Additional Material: 2 Ill.
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    URL: http://dx.doi.org/10.1002/cite.330260209
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  • 54
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    Dechema-Erfahrungsaustausch (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 113-113 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260212
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  • 55
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    Versammlungsberichte (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 101-106 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260210
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    Neue Bücher (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 114-116 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260215
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    Wirtschaftliches aus der Chemischen Technik (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 118-120 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260217
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    Masthead (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954) 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260301
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  • 59
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    Kurzweg-Fraktionierung (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 129-131 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Es wird ein Verfahren und die zugehörige Apparatur für die kontinuierliche Kurzweg-Fraktionierung beschrieben. Die Apparatur ist aus kontinuierlich abgestuften Elementen der einfachen Destillation zusammengesetzt und hat als wesentlichsten Bestandteil eine Heizwanne mit einem Temperaturgradienten. Die Leistungsfähigkeit des Verfahrens wird am Beispiel eines Zweistoffgemisches mit einer gewöhnlichen Fraktionierung aus einem Claisenkolben verglichen.
    Additional Material: 1 Ill.
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    URL: http://dx.doi.org/10.1002/cite.330260303
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    Strömungstechnische Maßnahmen im TrocknerbauIm wesentlichen nach einem Vortrag vor dem Ausschuß Trocknungstechnik der VDI-Arbeitsgruppe Verfahrenstechnik am 30. Mai 1953 in Ludwigshafen a. Rh.; vgl. diese Ztschr. 25, 738 [1953]. (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 132-140 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: An einigen Beispielen wird erläutert, wie man durch strömungstechnische Maßnahmen in Trocknern eine gleichmäßige Trocknung und geringe Verluste an Strömungsenergie erreichen kann. Ferner wird dargelegt, wie sich die Strömung vor und hinter Lüftern sowie in Querschnittsänderungen und Umlenkungen ordnen und lenken läßt, und wie man die Luft auf mehrere Kanäle genügend gleichmäßig verteilen kann.
    Additional Material: 27 Ill.
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    URL: http://dx.doi.org/10.1002/cite.330260304
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    Versammlungsberichte (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 157-163 
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    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260309
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    Die Wirkung der Magnus-Kraft in laminaren StrömungenVI. Mitteilung aus dem Laboratorium der Hauptverwaltung der Salzdetfurth AG., Hannover. I. bis V. Mitteilung: Interne Konzernmitteilungen. Vorgetragen auf der Hauptversammlung der Gesellschaft Deutscher Chemiker in Hamburg am 18. Sept. 1953.. I. Teil. Der Quertrieb in sedimentierenden Teilchenschüttungen (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 141-150 
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    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Es werden die Bedingungen für die Entstehung eines Quertriebs (Auftriebs), der von der Magnus-Kraft herrührt, beschrieben und zunächst an sedimentierenden Teilchenschüttungen verschiedener Größe und verschiedenen Materials geprüft. Dabei wird die Zahl der sedimentierenden Teilchen im wandnahen Bereich mit der im achsennahen Bereich verglichen. Es ergab sich eine Anreicherung der Teilchen im achsennahen Bereich bis zu 25%. Bei sedimentierenden Schüttungen mit Teilchen zweier Größenklassen reichern sich dagegen die größeren im Strömungsmaximum bis zu 40% an.Im II. Teil dieser Arbeit wird die Wirkung der Magnus - Kraft in strömenden Elektrolytlösungen und Gasgemischen erörtert.
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    Umschau (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 163-168 
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    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 8 Ill.
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    URL: http://dx.doi.org/10.1002/cite.330260310
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    Neue Büucher (1954)
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    Chemie Ingenieur Technik - CIT 26 (1954), S. 171-172 
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    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260313
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    Wirtschaftliches aus der Chemischen Technik (1954)
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    Chemie Ingenieur Technik - CIT 26 (1954), S. 175-176 
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    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260316
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    Neue Bücher (1954)
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    Chemie Ingenieur Technik - CIT 26 (1954), S. 236-236 
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    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
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    URL: http://dx.doi.org/10.1002/cite.330260415
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    Die neuen Benzin-„Additives“ (1954)
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    Chemie Ingenieur Technik - CIT 26 (1954), S. 237-238 
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    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260416
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    Wirtschaftsnachrichten (1954)
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    Chemie Ingenieur Technik - CIT 26 (1954), S. 239-244 
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    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260417
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    Die Flüssigkeitsdichte im Sättigungszustand. Untersuchungen über eine Erweiterung des Theorems der übereinstimmenden Zustände. Teil IITeil I: Diese Ztschr. 26, 83 [1954]. (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 259-264 
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    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Wenn man die Meßwerte für die reduzierte (d. h. auf den kritischen Zustand bezogene) Dichte aesättigter Flüssigkeiten in Abhängigkeit von der reduzierten Temperatur aufträgt, so erhält man, ähnlich wie beim Dampfdruck, keine einheitliche Kurve, wie es das Theorem der übereinstimmenden Zustände in der üblichen Fassung verlangt, sondern eine einparametrige Kurvenschar. Für diese wird eine der Erfahrung angepaßte Gleichung aufgestellt, die den auch für die Dampfdruckkurve maßgebenden „kritischen Parameter“ enthält. Durch Einführung der Nullpunktsdichte statt der kritischen Dichte ergibt sich eine vom kritischen Parameter weitgehend unabhängige Funktion, die tabellarisch wiedergegeben wird und deren Anwendungsmöglichkeiten diskutiert und an Hand von Zahlenbeispielen erläutert werden. Das auf den absoluten Nullpunkt extrapolierte Molvolumen zeigt bei Kohlenwasserstoffen präzise Zusammenhänge mit der Struktur der Molekeln. Zur Abschätzung des kritischen Volumens organischer Verbindungen wird eine Zusammenstellung der Meßwerte und ein System von Substitutionsinkrementen angegeben.
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    Berechnung der Ausmauerung stählerner, kugelförmiger Behälter (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 281-284 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Nach einer grundsätzlichen Betrachtung des Ausmauerungs-Problems werden allgemeine Formeln zur Ermittlung der Spannungen und Dehnungen angegeben, die in einer Kugelschale unter dem Einfluß des Druckes und eines Temperaturgefälles auftreten. Hieraus wird für den ausgemauerten, kugelförmigen Behälter eine Bedingung hergeleitet, deren Erfüllung gewährleistet, daß sich das Mauerwerk vom Eisenmantel nicht ablöst. Die Verwendung von quellendem Kitt bringt Vorteile. Abschließend werden die im Mauerwerk und im Eisenmantel auftretenden Spannungen ermittelt.
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    URL: http://dx.doi.org/10.1002/cite.330260509
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    Die Wirkung der Magnuskraft in laminaren StrömungenTeil I, s. diese Ztschr. 26, 141/50 [1954]. Bilder, Tabellen und Fußnoten sind für Teil I und II durchlaufend numeriert.. II. Teil. Der Quertrieb in Lösungen und Gasgemischen (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 270-278 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Im I. Teil wurde der Quertrieb in sedimentierenden Teilchenschüttungen untersucht. Nachfolgend wird gezeigt, daß auch in laminar strömenden wäßrigen Elektrolytlösungen ein Quertrieb entsteht, infolgedessen die größeren lonen bevorzugt in den Bereich höherer Strömungsgeschwindigkeit, also in den achsennahen Bereich diffundieren. Diese Versuche lassen Schlüsse auf die lonenhydratation zu. Außerdem wurde der Quertrieb in laminar strömender Luft mit sehr hoher Strömungsgeschwindigkeit, z. B. im Wirbelrohr, beobachtet. Auch dort ergibt sich für die größeren Molekeln eine Anreicherung im achsennahen Bereich, d. h. eine O2-Anreicherung im Kaltgasanteil. Abschließend werden die Ergebnisse in den einzelnen Aggregatzuständen miteinander verglichen.
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    Umschau (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 287-289 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 8 Ill.
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    URL: http://dx.doi.org/10.1002/cite.330260511
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    Unfallverhütung (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 291-291 
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    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260514
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    Neue Apparate und Meßgeräte für Betrieb und Labor (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 349-349 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 2 Ill.
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    URL: http://dx.doi.org/10.1002/cite.330260612
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    Umschau (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 413-418 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 11 Ill.
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    URL: http://dx.doi.org/10.1002/cite.330260711
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    Wirtschaftsnachrichten (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 425-428 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260717
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  • 77
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    Keramische Materialien für Temperaturen über 1500° (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 533-538 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Für verschiedene Verfahren der chemischen Technik, insbesondere bei der Glasherstellung und in der Eisenindustrie, werden Werkstoffe gebraucht, die bei Temperaturen von etwa 1500 °C und darüber beständig sind. Hierfür kommen vor allem keramische Materialien in Betracht. Es werden daher im folgenden Baustoffe und Rohstoffe behandelt, welche zur Herstellung von Silica-, Sillimanit-, Korund-, Magnesit-, Chrommagnesit-, Dolomit-, Siliciumcarbid- und Zirkon-Steinen dienen. Anwendungsgrenzen, Wärmedehnung, Temperaturwechselbeständigkeit, Wärmeleitung und die chemische Beständigkeit dieser Materialien bei Temperaturen um 1500 °C werden besprochen.
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    Kunststoff-Folien und Kunststoff-beschichtete Papiere zur Verpackung chemischer Erzeugnisse (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 548-554 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Es wird ein Überblick über die Eigenschaften und die Verwendungsmöglichkeiten von Kunststoff-Folien und kunststoffbeschichteten Papieren und Pappen als Verpackungswerkstoffe in der chemischen Industrie gegeben, wobei deren Vor- und Nachteile einander gegenübergestellt werden.
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    Aluminiumfolien zur Verpackung in der chemischen und pharmazeutischen Industrie (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 543-547 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Der Packstoffverbrauch entfällt zu einem großen Teil auf Aluminiumfolien, vor allem in der Nahrungsund Genußmittel-Industrie. In der chemischen und pharmazeutischen Industrie dagegen ist er verhältnismäßig gering. Im folgenden wird ein Überblick über die für Verpackungszwecke wichtigen Eigenschaften von Aluminiumfolien gegeben unter besonderer Berücksichtigung der Möglichkeiten zu ihrer Veredelung.
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    Bascodur, ein Konstruktionswerkstoff für die chemische Technik (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 555-561 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Die Badische Anilin- & Soda-Fabrik A.G. hat gemeinsam mit der Firma Dr. F. Raschig GmbH., Ludwigshafen am Rhein, für die chemische Technik den neuen Werkstoff BascodurEingetragenes Warenzeichen der BASF. entwickelt, der geeignet ist, Lücken innerhalb der heute bekannten nichtmetallischen Apparatebaustoffe zu schließen. Nach kurzen Angaben über Eigenschaften und Verarbeitung des Materials werden an Hand zahlreicher Bilder insbesondere Anwendungsbeispiele aus dem chemischen Apparatebau besprochen.
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    Versammlungsberichte (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 568-575 
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    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 2 Tab.
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    Normung (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 643-643 
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    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330261113
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    Wirtschaftsnachrichten (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 647-648 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330261118
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    Die Kennzahlen des Wärmeübergangs in anschaulicher Darstellung und Anwendung (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 667-669 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Im In- und Ausland nimmt die Anwendung dimensionsloser Kennzahlen auf dem Gebiet der Wärmeübertragung immer mehr zu. Diese Entwicklung läßt sich nicht durch den Einwand aufhalten, daß dimensionslose Darstellungen unanschaulich seien, denn in Wirklichkeit lassen sich alle wichtigen Kennzahlen als Verhältnisse gleichartiger Größen in anschaulicher Form darstellen und bei der Berechnung von Wärmeübertragern verwenden.
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    Automatische Zählung und Größenanalyse mikroskopischer TeilchenVorgetragen auf der Sitzung des Arbeitsausschusses „Zerkleinerungstechnik“ der VDI-Fachgruppe Verfahrenstechnik am 6. März 1954 in Marburg; vgl. diese Ztschr. 26, 342 [1954]. (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 661-667 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Das Problem der automatischen Zählung und Größenanalyse mikroskopischer Teilchen wird besonders in den USA und England seit einigen Jahren intensiv bearbeitet, während in Deutschland auf diesem Gebiet praktisch noch kein Schrifttum vorliegt. Es sollen deshalb hier der Stand der Entwicklung und die bekanntgewordenen Geräte diskutiert werden. Allen beschriebenen Methoden ist das Ziel gemeinsam, jedes Teilchen einzeln zu messen und zu zählen. Dies führt zwangsläufig zu elektronischen Mitteln, da nur diese hinreichende Zählgeschwindigkeiten ermöglichen. -  Im ersten Teil der Arbeit werden Verfahren zur automatischen Größenanalyse von Aerosolen behandeit, während im zweiten Teil automatische Methoden zur Auszählung von mikroskopischen Präparaten und Mikrophotographien beschrieben werden.
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    Temperaturverlauf und Wärmeverluste beim Anheizen und Abkühlen dickwandiger, kugelförmiger Behälter. Teil II. Der Abkühlungsvorgang. Gasgefüllte Behälter (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 673-676 
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    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Nachdem im ersten Teil das Anheizen flüssigkeitsgefüllter Behälter behandelt wurde, werden nun der Temperaturverlauf und die Wärmeverluste beim Abkühlen derartiger Behälter berechnet. Dabei wird sowohl der Abkühlungsvorgang aus dem stationären Zustand heraus behandelt als auch der Fall, daß vor Erreichen des stationären Zustands die Wärmezufuhr im Innern des Behälters aufhört. Die Resultate für den Abkühlungsvorgang lassen sich ohne neue Schwierigkeiten aus den schon in Teil I gewonnenen Ergebnissen für das Anheizen herleiten. Es wird ferner das Anheizen und die Abkühlung gasgefüllter Behälter untersucht. Zwei Beispiele zeigen die Anwendung der gewonnenen Gleichungen und der daraus entwickelten Diagramme.
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    Neue Wege der Verfahrenstechnik (1954)
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    Chemie Ingenieur Technik - CIT 26 (1954), S. 1-1 
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    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
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    URL: http://dx.doi.org/10.1002/cite.330260102
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    Masthead (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954) 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260101
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    Neue Versuche an TrockenapparatenErweiterte Fassung eines Vortrages auf der Jahrestagung der VDI-Fachgruppe Verfahrenstechnik am 2. Okt. 1953; vgl. diese Ztschr. 25, 684 [1953]. Deutsche Bearbeitung Dipl.-Ing. Fr. Hess, Karlsruhe. (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 1-9 
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    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Aus umfangreichen Untersuchungen an den verschiedensten Trocknertypen1 wird in dieser Arbeit über die Ergebnisse berichtet, die an Tunnel-, Mulden- sowie Stromtrocknern erhalten wurden. Die Versuche hatten den Zweck, rechnerische Unterlagen für den Entwurf der Trockner zu schaffen.
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    Bewertungsfragen der FeinzerkleinerungVorgetragen auf der Jahrestagung der VDI-Fachgruppe Verfahrenstechnik am 2. Okt. 1953 in Karlsruhe, vgl. diese Ztschr. 25, 684 [1953]. (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 14-18 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Die Erzeugung der technisch wichtigen spezifischen Oberflächen am Beispiel von Quarzsand bei fort-schreitender Schwingmahlung wird in weitem Feinheitsbereich verfolgt; die jeweils aus Siebanalyse bzw. Körnungsnetz erhaltenen idealisierten Oberflächen und die Oberflächen nach dem Blaine-Test werden mit der zunächst physikalish am besten definierten Oberfläche nach der Argon-Adsorptionsmethode verglichen und wesentliche zerkleinerungsphysikalische Folgerungen gezogen sowie Bewertungsfragen beantwortet.
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    Strömungstechnische Probleme der VerfahrenstechnikVorgetragen auf der Jahrestagung des VDI-Fachausschusses Verfahrenstechnik am 3. Oktober 1953 in Karlsruhe; vgl. diese Ztschr. 25, 685 [1953]. (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 29-34 
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    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: In der Verfahrenstechnik sind häufig Prozesse durchzuführen, bei denen Mehrstoffgemische mit einer flüssigen oder gasförmigen Phase behandelt werden müssen. Die bei diesen Verfahren auftretenden strömungstechnischen Probleme sind bisher von der klassischen Strömungslehre nur sehr wenig erörtert worden. Die folgenden Ausführungen zeigen, wie auf diesem Gebiete durch Anwendung strömungstechnischer Methoden praktisch wichtige Erkenntnisse gewonnen werden können.
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    Über die Bestimmung der Wärmeleitfähigkeit, der Wärmekapazität und der Wärmeeindringzahl in einem KurzzeitverfahrenGekürzte Fassung eines Vortrages auf der Jahrestagung der VDI-Fachgruppe Verfahrenstechnik am 3. Oktober 1953 in Karlsruhe, vgl. diese Ztschr. 25, 689 [1953]. (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 42-44 
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    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Beschrieben werden ein Verfahren sowie eine Meßanordnung, mit denen die Wämeleitfähigkeit λ, die Wärmekapazität cλ und die Wärmeeindringzahl \documentclass{article}\pagestyle{empty}\begin{document}$\sqrt {\lambda c\gamma } $\end{document} in einem Kurzversuch gleichzettig bestimmt werden können.
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    Versammlungsberichte (1954)
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    Chemie Ingenieur Technik - CIT 26 (1954), S. 44-51 
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    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
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    Der Regenerator als Hochleistungs-WärmeaustauscherGekürzte Fassung eines Vortrages des Verfassers auf der Tagung der VDI-Fachgruppe „Verfahrenstechnik“ am 3. Okt. 1953 in Karlsruhe. Eine ausführliche Veröffentlichung ist erst für einen späteren Zeitpunkt vorgesehen, weil die Versuche, über die in Karlsruhe berichtet wurde, noch weiter geführt werden. In dem vorliegenden Beitrag werden daher nur einige grundsätzliche Gesichtspunkte herausgestellt. (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 39-41 
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    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: In einer Versuchsanlage wurden Wärmeübergang und Druckabfall verschiedener Speichermassen gemessen. Auf Grund dieser und früherer Versuche wurden Heizflächenbedarf und Heizflächenkosten unter gleichen energetischen Bedingungen für längs durchströmte Rohre verschiedenen Durchmessers, Kugelschüttungen, Raschig-Ringfüllungen sowie Riffeleinsätze ermittelt. Am Beispiel der Regeneratoren von Linde-Fränkl-Anlagen werden die Vorteile gegenüber Röhren-Wärmeaustauschern diskutiert. Die Versuche sind noch nicht abgeschlossen.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260110
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  • 95
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    Normung (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 55-56 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260114
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  • 96
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    Electronic Resource
    Neue Bücher (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 56-56 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260116
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  • 97
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    Halbzellstoff wird interessant (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 59-60 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260119
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  • 98
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    Electronic Resource
    Masthead (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954) 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260201
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  • 99
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    Das Fünfte Überleitungsgesetz auf dem Gebiet des gewerblichen Rechtsschutzes IITeil I, s. diese Ztschr. 25, 761 [1953]. (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 57-57 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260117
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  • 100
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    Electronic Resource
    Neue Wege der Kohleveredelung (1954)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 26 (1954), S. 57-59 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330260118
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