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Analysis of Numerical Simulation Database for Pressure Fluctuations Induced by High-Speed Turbulent Boundary LayersDirect 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.
Document ID
20140011408
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Duan, Lian (Missouri Univ. of Science and Technology Rolla, MO, United States)
Choudhari, Meelan M. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 8, 2014
Publication Date
June 16, 2014
Subject Category
Aerodynamics
Report/Patent Number
AIAA Paper-2014-2912
NF1676L-17593
Meeting Information
Meeting: AIAA Fluid Dynamics Conference
Location: Atlanta, GA
Country: United States
Start Date: June 16, 2014
End Date: June 20, 2014
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 794072.02.07.02.02
CONTRACT_GRANT: NNL09AA00A
CONTRACT_GRANT: NSF OCI-1053575
Distribution Limits
Public
Copyright
Public Use Permitted.

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