Analysis of Numerical Simulation Database for Pressure Fluctuations Induced by High-Speed Turbulent Boundary Layers
作者： Meelan M. Choudhari , Lian Duan
DOI:
关键词: Computational fluid dynamics 、 Mach number 、 Reynolds number 、 Acoustics 、 Physics 、 Hypersonic speed 、 Mechanics 、 Boundary layer 、 Freestream 、 Turbulence 、 Direct numerical simulation
摘要: Direct numerical simulations (DNS) of Mach 6 turbulent boundary layer with nominal freestream number and Reynolds Re � 460 are conducted at two wall temperatures (Tw=Tr = 0 :25 , :76 ) to investigate the generated pressure uctuations their dependence on temperature. It is shown that mean ow predictions computed frequency spectrum wall-pressure in good agreement measurements Boeing/AFOSR Quiet Tunnel Purdue University. Simulations indicate inuence temperature largely limited near-wall region, characteristics showing a strong dependence. Wall has little propagation speed signal. The radiation intensity compares well between wall-temperature cases when normalized by local shear; signal orientation wave front show
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