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  • 1
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    Structural dynamic testing of composite propfan blades for a cruise missile wind tunnel model (1993)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The Naval Weapons Center at China Lake, California is currently evaluating a counter rotating propfan system as a means of propulsion for the next generation of cruise missiles. The details and results of a structural dynamic test program are presented for scale model graphite-epoxy composite propfan blades. These blades are intended for use on a cruise missile wind tunnel model. Both dynamic characteristics and strain operating limits of the blades are presented. Complications associated with high strain level fatigue testing methods are also discussed.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-TM-105272 , E-6663 , NAS 1.15:105272
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Combustion Research Aboard the ISS Utilizing the Combustion Integrated Rack and Microgravity Science Glovebox (2002)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The Physical Sciences Research Program of NASA sponsors a broad suite of peer-reviewed research investigating fundamental combustion phenomena and applied combustion research topics. This research is performed through both ground-based and on-orbit research capabilities. The International Space Station (ISS) and two facilities, the Combustion Integrated Rack and the Microgravity Science Glovebox, are key elements in the execution of microgravity combustion flight research planned for the foreseeable future. This paper reviews the Microgravity Combustion Science research planned for the International Space Station implemented from 2003 through 2012. Examples of selected research topics, expected outcomes, and potential benefits will be provided. This paper also summarizes a multi-user hardware development approach, recapping the progress made in preparing these research hardware systems. Within the description of this approach, an operational strategy is presented that illustrates how utilization of constrained ISS resources may be maximized dynamically to increase science through design decisions made during hardware development.
    Keywords: Propellants and Fuels
    Type: NASA/TM-2002-211998 , NAS 1.15:211998 , E-13670 , IAC-02-T.4.05 , 53rd International Astronautical Congress; Oct 10, 2002 - Oct 19, 2002; Houston, TX; United States
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  • 3
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    NASA RPS Program Overview: A Focus on RPS Users (2016)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The goal of NASA's Radioisotope Power Systems (RPS) Program is to make RPS ready and available to support the exploration of the solar system in environments where the use of conventional solar or chemical power generation is impractical or impossible to meet the needs of the missions. To meet this goal, the RPS Program, working closely with the Department of Energy, performs mission and system studies (such as the recently released Nuclear Power Assessment Study), assesses the readiness of promising technologies to infuse in future generators, assesses the sustainment of key RPS capabilities and knowledge, forecasts and tracks the Programs budgetary needs, and disseminates current information about RPS to the community of potential users. This process has been refined and used to determine the current content of the RPS Programs portfolio. This portfolio currently includes an effort to mature advanced thermoelectric technology for possible integration into an enhanced Multi-Mission Radioisotope Generator (eMMRTG), sustainment and production of the currently deployed MMRTG, and technology investments that could lead to a future Stirling Radioisotope Generator (SRG). This paper describes the program planning processes that have been used, the currently available MMRTG, and one of the potential future systems, the eMMRTG.
    Keywords: Lunar and Planetary Science and Exploration; Electronics and Electrical Engineering
    Type: GRC-E-DAA-TN30400 , 2016 IEEE Aerospace Conference; Mar 05, 2016 - Mar 12, 2016; Big Sky, MT; United States
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  • 4
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    NASA's Radioisotope Power Systems Program Status (2013)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: NASA's Radioisotope Power Systems (RPS) Program began formal implementation in December 2010. The RPS Program's goal is to make available RPS for the exploration of the solar system in environments where conventional solar or chemical power generation is impractical or impossible to meet mission needs. To meet this goal, the RPS Program manages investments in RPS system development and RPS technologies. The current keystone of the RPS Program is the development of the Advanced Stirling Radioisotope Generator (ASRG). This generator will be about four times more efficient than the more traditional thermoelectric generators, while providing a similar amount of power. This paper provides the status of the RPS Program and its related projects. Opportunities for RPS generator development and targeted research into RPS component performance enhancements, as well as constraints dealing with the supply of radioisotope fuel, are also discussed in the context of the next ten years of planetary science mission plans.
    Keywords: Spacecraft Propulsion and Power; Nuclear Physics; Energy Production and Conversion
    Type: GRC-E-DAA-TN10177 , International Energy Conversion Engineering Conference (IECEC); Jul 14, 2013 - Jul 17, 2013; San Jose, California; United States
    Format: application/pdf
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  • 5
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    NASA Microgravity Combustion Science Research Plans for the ISS (2003)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A peer-reviewed research program in Microgravity Combustion Science has been chartered by the Physical Sciences Research Division of the NASA Office of Biological and Physical Research. The scope of these investigations address both fundamental combustion phenomena and applied combustion research topics of interest to NASA. From this pool of research, flight investigations are selected which benefit from access to a microgravity environment. Fundamental research provides insights to develop accurate simulations of complex combustion processes and allows developers to improve the efficiency of combustion devices, to reduce the production of harmful emissions, and to reduce the incidence of accidental uncontrolled combustion (fires, explosions). Through its spacecraft fire safety program, applied research is conducted to decrease risks to humans living and working in space. The Microgravity Combustion Science program implements a structured flight research process utilizing the International Space Station (ISS) and two of its premier facilities- the Combustion Integrated Rack of the Fluids and Combustion Facility and the Microgravity Science Glovebox - to conduct space-based research investigations. This paper reviews the current plans for Microgravity Combustion Science research on the International Space Station from 2003 through 2012.
    Keywords: Space Sciences (General)
    Type: 2nd International Symposium on Physical Sciences in Space/Spacebound 2003; May 04, 2003 - May 08, 2003; Toronto, Ontario; Canada
    Format: text
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  • 6
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    Transitioning a Fundamental Research Program to Align with the NASA Exploration Initiative-Perspectives from Microgravity Combustion Science and Fluid Physics (2004)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A new Vision for Space Exploration was announced earlier this year by U.S. President George W. Bush. NASA has evaluated on-going programs for strategic alignment with this vision. The evaluation proceeded at a rapid pace and is resulting in changes to the scope and focus of experimental research that will be conducted in support of the new vision. The existing network of researchers in the physical sciences - a highly capable, independent, and loosely knitted community - typically have shared conclusions derived from their work within appropriate discipline-specific peer reviewed journals and publications. The initial result of introducing this Vision for Space Exploration has been to shift research focus from a broad coverage of numerous, widely varying topics into a research program focused on a nearly-singular set of supporting research objectives to enable advances in space exploration. Two of these traditional physical science research disciplines, Combustion Science and Fluid Physics, are implementing a course adjustment from a portfolio dominated by "Fundamental Science Research" to one focused nearly exclusively on supporting the Exploration Vision. Underlying scientific and engineering competencies and infrastructure of the Microgravity Combustion Science and Fluid Physics disciplines do provide essential research capabilities to support the contemporary thrusts of human life support, radiation countermeasures, human health, low gravity research for propulsion and materials and, ultimately, research conducted on the Moon and Mars. A perspective on how these two research disciplines responded to the course change will be presented. The relevance to the new NASA direction is provided, while demonstrating through two examples how the prior investment in fundamental research is being brought to bear on solving the issues confronting the successful implementation of the exploration goals.
    Keywords: Space Processing
    Type: IAC-04-Q.6/T.5.06 , E-14913 , 55th International Astronautical Congress; Oct 04, 2004 - Oct 09, 2004; Vancouver, British Columbia; Canada
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  • 7
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    Requirements and Development of an Acceleration Measurement System for International Space Station Microgravity Science Payloads (1997)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The International Space Station is being developed by NASA and international partners as a versatile user platform to allow long term on-orbit investigations of a variety of scientific and technology arenas. In particular, scientific studies are planned within a research class known as microgravity science in areas such as biotechnology, combustion, fluid physics, and materials sciences. An acceleration measurement system is in development to aid such research conducted in the on-orbit conditions of apparent weightlessness. This system provides a general purpose acceleration measurement capability in support of these payloads and investigators. Such capability allows for systematic study of scientific phenomena by obtaining information regarding the local accelerations present during experiment operations. Preparations for implementing this flight measurement system involves two distinct stages: requirements development prior to initiating the design activity, and the design activity itself. This paper defines the requirements definition approach taken, provides an overview of the results of the requirements phase, and outlines the initial design considerations being addressed for this measurement system. Some preliminary engineering approaches are also described.
    Keywords: Spacecraft Instrumentation
    Type: NASA-TM-107484 , NAS 1.15:107484 , E-10779 , International Instrumentation Symposium; May 04, 1997 - May 08, 1997; Orlando, FL; United States
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  • 8
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    Space Acceleration Measurement System-II: Microgravity Instrumentation for the International Space Station Research Community (1999)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The International Space Station opens for business in the year 2000, and with the opening, science investigations will take advantage of the unique conditions it provides as an on-orbit laboratory for research. With initiation of scientific studies comes a need to understand the environment present during research. The Space Acceleration Measurement System-II provides researchers a consistent means to understand the vibratory conditions present during experimentation on the International Space Station. The Space Acceleration Measurement System-II, or SAMS-II, detects vibrations present while the space station is operating. SAMS-II on-orbit hardware is comprised of two basic building block elements: a centralized control unit and multiple Remote Triaxial Sensors deployed to measure the acceleration environment at the point of scientific research, generally within a research rack. Ground Operations Equipment is deployed to complete the command, control and data telemetry elements of the SAMS-II implementation. Initially, operations consist of user requirements development, measurement sensor deployment and use, and data recovery on the ground. Future system enhancements will provide additional user functionality and support more simultaneous users.
    Keywords: Spacecraft Instrumentation
    Type: NASA/TM-1999-209047 , NAS 1.15:209047 , E-11578 , Instrumentation and Measurement Technology; May 24, 1999 - May 26, 1999; Venice; Italy
    Format: application/pdf
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  • 9
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    NASA's Radioisotope Power Systems - Plans (2015)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: NASA's Radioisotope Power Systems (RPS) Program continues to plan and implement content to enable planetary exploration where such systems could be needed, and to prepare more advanced RPS technology for possible infusion into future power systems. The 2014-2015 period saw significant changes, and strong progress. Achievements of near-term objectives have enabled definition of a clear path forward in which payoffs from research investments and other sustaining efforts can be applied. The future implementation path is expected to yield a higher-performing thermoelectric generator design, a more isotope-fuel efficient system concept design, and a robust RPS infrastructure maintained effectively within both NASA and the Department of Energy. This paper describes recent work with an eye towards the future plans that result from these achievements.
    Keywords: Energy Production and Conversion; Nuclear Physics; Spacecraft Propulsion and Power
    Type: GRC-E-DAA-TN24182 , Propulsion and Energy Forum 2015; Jul 27, 2015 - Jul 29, 2015; Orlando, FL; United States
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  • 10
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    NASA's Radioisotope Power Systems Program Overview - A Focus on RPS Users (2016)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The goal of NASA's Radioisotope Power Systems (RPS) Program is to make RPS ready and available to support the exploration of the solar system in environments where the use of conventional solar or chemical power generation is impractical or impossible to meet potential future mission needs. To meet this goal, the RPS Program manages investments in RPS technologies and RPS system development, working closely with the Department of Energy. This paper provides an overview of the RPS Program content and status, its collaborations with potential RPS users, and the approach employed to maintain the readiness of RPS to support future NASA mission concepts.
    Keywords: Spacecraft Propulsion and Power; Energy Production and Conversion
    Type: GRC-E-DAA-TN27647 , IEEE Aerospace Conference; Mar 05, 2016 - Mar 12, 2016; Big Sky, MT; United States
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