Inviscid and viscous CFD codes have been applied to a modified Space Shuttle orbiter geometry to investigate differences between preflight aerodynamic predictions and aerodynamic data from hypersonic reentry flight. Flow field solutions were obtained for wind tunnel conditions and flight conditions to assess Mach number, real-gas, and viscous effects on the reentry aerodynamics of the orbiter. Based on the CFD studies, a methodology model has been developed to (1) extrapolate wind tunnel data to flight conditions and (2) calculate a DCM for use with the Aerodynamic Design Data Book. Comparisons are made with selected flight data. Results of the study indicate that the differences between flight and pre-STS-1 predictions of hypersonic pitching moment are primarily due the to Mach number and real-gas effects.


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    Title :

    Explanation of the hypersonic longitudinal stability problem: Lessons learned


    Contributors:
    Griffith, B. J. (author) / Maus, J. R. (author) / Best, J. T. (author)


    Publication date :

    1983-10-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




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