Direct numerical simulations (DNS) of Mach 6 turbulent boundary layer with nominal freestream Mach number of 6 and Reynolds number of Re(sub T) approximately 460 are conducted at two wall temperatures (Tw/Tr = 0.25, 0.76) to investigate the generated pressure fluctuations and their dependence on wall temperature. Simulations indicate that the influence of wall temperature on pressure fluctuations is largely limited to the near-wall region, with the characteristics of wall-pressure fluctuations showing a strong temperature dependence. Wall temperature has little influence on the propagation speed of the freestream pressure signal. The freestream radiation intensity compares well between wall-temperature cases when normalized by the local wall shear; the propagation speed of the freestream pressure signal and the orientation of the radiation wave front show little dependence on the wall temperature.


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    Titel :

    Analysis of Numerical Simulation Database for Pressure Fluctuations Induced by High-Speed Turbulent Boundary Layers


    Beteiligte:
    Duan, Lian (Autor:in) / Choudhari, Meelan M. (Autor:in)

    Kongress:

    AIAA Fluid Dynamics Conference ; 2014 ; Atlanta, GA, United States
    AIAA Aviation and Aeronautics Forum and Exposition (AVIATION 2014) ; 2014 ; Atlanta, GA, United States


    Erscheinungsdatum :

    2014-06-16


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :