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Wall pressure coherence in supersonic turbulent boundary layers

Published online by Cambridge University Press:  06 September 2013

A. Di Marco*
Affiliation:
Department of Mechanical and Industrial Engineering, University Roma TRE, Rome, 00146, Italy
R. Camussi
Affiliation:
Department of Mechanical and Industrial Engineering, University Roma TRE, Rome, 00146, Italy
M. Bernardini
Affiliation:
Department of Mechanical and Aerospace Engineering, University La Sapienza, Rome, 00184, Italy
S. Pirozzoli
Affiliation:
Department of Mechanical and Aerospace Engineering, University La Sapienza, Rome, 00184, Italy
*
Email address for correspondence: [email protected]

Abstract

A numerical database (Bernardini & Pirozzoli, Phys. Fluids, vol. 23, 2011, 085102) is analysed to investigate cross-statistics of wall-pressure fluctuations induced by supersonic turbulent boundary layers developing over a rigid smooth wall without a pressure gradient. The Mach number spans from 2 to 4 and a relatively large range of Reynolds numbers is considered. It is shown, for the first time, that the cross-statistics of wall-pressure fluctuations at such high Mach numbers is very similar to that usually observed in incompressible flow conditions. Furthermore, it is demonstrated that theoretical predictions provided by the well-known Corcos and Efimtsov models continue to apply.

Type
Papers
Copyright
©2013 Cambridge University Press 

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