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  • Other Sources  (4)
  • 1990-1994  (4)
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  • 1
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    Unknown
    HSCT high-lift technology requirements (1992)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The viewgraphs and discussion of high lift needs and related aerodynamic goals established in system studies are described. The goals are presented for the takeoff, approach, and subsonic climb and cruise modes. The status of the related high lift databases and available design and analysis methods are described. Various high lift research and technology areas for future work including innovative concepts verification, flap design, computational fluid dynamics (CFD) calibration and application, high Reynolds number testing, subsonic/transonic flap optimization, and flight testing are described.
    Keywords: AERODYNAMICS
    Type: NASA. Langley Research Center, First Annual High-Speed Research Workshop, Part 4; p 1767-1788
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    Low sonic boom design and performance of a Mach 2.4/1.8 overland high speed civil transport (1992)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This paper describes the design features of a Douglas Mach 2.4/1.8 Low Sonic Boom High Speed Civil Transport (HSCT) configuration developed for NASA. The configuration is designed to fly over water at Mach 2.4 for highest productivity and economic worth, and fly over land at Mach 1.8 with reduced sonic boom loudness.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA. Langley Research Center, High-Speed Research: Sonic Boom, Volume 2; p 55-63
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Hypersonic flow past open cavities (1994)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The hypersonic flow over a cavity is investigated. The time-dependent compressible Navier-Stokes equations are numerically solved. An implicit algorithm, with a subiteration procedure to recover time accuracy, is used to perform the time-accurate computations. The objective of the study is to investigate the effects of Reynolds number and cavity dimensions. The comparsion of the computations with available experimental data, in terms of time mean static pressure, heat transfer, and Mach number, show good agreement. In the computations large vortex structures, which adversely affect the cavity flow characteristics, are observed at the rear of the cavity. A self-sustained oscillatory motion occurs within the cavity over a range of Reynolds number and cavity dimensions. The frequency spectra of the oscillations show good agreement with a modified semiempirical relation.
    Keywords: AERODYNAMICS
    Type: AIAA Journal (ISSN 0001-1452); 32; 12; p. 2387-2393
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Hypersonic flow past open cavities (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-08-27
    Description: The hypersonic flow over a cavity is investigated. The time-dependent compressible Navier-Stokes equations, in terms of mass averaged variables, are numerically solved. An implicit algorithm, with a subiteration procedure to recover time-accuracy, is used to perform the time-accurate computations. The objective of the study is to investigate the effects of Reynolds number and cavity dimensions. The comparison of the computations with available experimental data, in terms of time mean static pressure, heat transfer, and Mach number show good agreement. In the computations large vortex structures, which adversely affect the cavity flow characteristics, are observed at the rear of the cavity. A self-sustained oscillatory motion occurs within the cavity over a range of Reynolds number and cavity dimensions. The frequency spectra of the oscillations show good agreement with a modified semi-empirical relation.
    Keywords: AERODYNAMICS
    Type: AIAA PAPER 93-2969 , ; 11 p.|AIAA, Fluid Dynamics Conference; Jul 06, 1993 - Jul 09, 1993; Orlando, FL; United States
    Format: text
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    NASA TECHNICAL REPORTS
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