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.
Analysis of Numerical Simulation Database for Pressure Fluctuations Induced by High-Speed Turbulent Boundary Layers
AIAA Fluid Dynamics Conference
;
2014
;
Atlanta, GA, United States
AIAA Aviation and Aeronautics Forum and Exposition (AVIATION 2014)
;
2014
;
Atlanta, GA, United States
2014-06-16
Aufsatz (Konferenz)
Keine Angabe
Englisch
NUMERICAL STUDY OF PRESSURE FLUCTUATIONS DUE TO HIGH-SPEED TURBULENT BOUNDARY LAYERS
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