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  • 1
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    Applied transonics at Grumman (1989)
    In:  CASI
    Details
    Publikationsdatum: 2013-08-31
    Beschreibung: A review of several applications of Computational Fluid Dynamics (CFD) to various aspects of aerodynamic design recently carried out at Grumman is presented. The emphasis is placed on project-oriented applications where the ease of use of the methods and short start-to-completion times are required. Applications cover transonic wing design/optimization, wing mounted stores load prediction, transonic buffet alleviation, fuselage loads estimation, and compact offset diffuser design for advanced aircraft configurations. Computational methods employed include extended transonic small disturbance (automatic grid embedding) formulation for analysis/design/optimization and a thin layer Navier-Stokes formulation for both external and internal flow analyses.
    Schlagwort(e): AERODYNAMICS
    Materialart: NASA, Langley Research Center, Transonic Symposium: Theory, Application, and Experiment, Volume 1, Part 1; p 133-152
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
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    Hypersonic forebody lift-induced drag (1989)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: The dominance of body-like shapes for hypersonic vehicles places emphasis on better understanding of pertinenet body flow physics. Computational methods are implemented to enhance the knowledge of drag components generated by the production of lift forces at hypersonic speeds. Three forebody shapes are examined to identify the effects related to body shape parameters. A Navier-Stokes code and classical Newtonian theory code provide predictions of the polar shapes upon which conclusions are drawn. In particular, it is noted that hypersonic body polar shapes are somewhat irregular; the result of incidence-induced form drag. Test data which supports this finding is identified. The means for reducing hypersonic body lift-induced drag are also identified, along with applied computational schemes that can reduce the cost of a configuration design program.
    Schlagwort(e): AERODYNAMICS
    Materialart: SAE PAPER 892345
    Format: text
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  • 3
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    Investigation of side inlets at supersonic speeds (1947)
    In:  CASI
    Details
    Publikationsdatum: 2016-06-07
    Schlagwort(e): AERODYNAMICS
    Materialart: NACA Conf. on Aerodyn. Probl. of Transonic Airplane Design; p 53-57
    Format: application/pdf
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  • 4
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    Aerodynamic principles for the design of jet- engine induction systems (1956)
    In:  CASI
    Details
    Publikationsdatum: 2019-05-23
    Beschreibung: Jet engine induction systems investigations and relationship of air inlets, drag, airframe, pressure recovery, flow and interferences
    Schlagwort(e): AERODYNAMICS
    Materialart: NACA-RM-A55F16
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
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    TRO-2D - A code for rational transonic aerodynamic optimization (1985)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: Features and sample applications of the transonic rational optimization (TRO-2D) code are outlined. TRO-2D includes the airfoil analysis code FLO-36, the CONMIN optimization code and a rational approach to defining aero-function shapes for geometry modification. The program is part of an effort to develop an aerodynamically smart optimizer that will simplify and shorten the design process. The user has a selection of drag minimization and associated minimum lift, moment, and the pressure distribution, a choice among 14 resident aero-function shapes, and options on aerodynamic and geometric constraints. Design variables such as the angle of attack, leading edge radius and camber, shock strength and movement, supersonic pressure plateau control, etc., are discussed. The results of calculations of a reduced leading edge camber transonic airfoil and an airfoil with a natural laminar flow are provided, showing that only four design variables need be specified to obtain satisfactory results.
    Schlagwort(e): AERODYNAMICS
    Materialart: AIAA PAPER 85-0425
    Format: text
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  • 6
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    Fast-Response Oxygen-Monitoring and Control System (1986)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: Oxygen sensor is Y2O3-stabilized ZrO2 ceramic disk maintained at 843 degrees C. Overall system response time reduced to about 0.2 second, equal to or less than 1 percent of tunnel run time. When test gas oxygen concentration differs from normal air concentration by 25 percent or more, alarm sounds, and emergency tunnel shutdown signal operates. New ZrO2 sensors intended for hypersonic-vehicle testing.
    Schlagwort(e): MATERIALS
    Materialart: LAR-13257 , NASA Tech Briefs (ISSN 0145-319X); 9; 4; P. 105
    Format: text
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  • 7
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    Material fatigue data obtained by card-programmed hydraulic loading system (1967)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Fatigue tests using load distributions from actual loading histories encountered in flight are programmed on punched electronic accounting machine cards. With this hydraulic loading system, airframe designers can apply up to 55 load levels to a test specimen.
    Schlagwort(e): MATERIALS
    Materialart: LAR-10042
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
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    Rapid method for determining nitrogen in tantalum and niobium alloys (1974)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Adaptation of commercial instrument which measures nitrogen and oxygen in steel gave results in less than four minutes. Sample is heated in helium atmosphere in single-use graphite crucible. Platinum flux facilitates melting of sample. Released gases are separated chromatographically and measured in thermal-conductivity cell.
    Schlagwort(e): MATERIALS
    Materialart: LEW-12237
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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