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Wall pressure coherence in supersonic turbulent boundary layers

Published online by Cambridge University Press:  06 September 2013

A. Di Marco ,
R. Camussi ,
M. Bernardini  and
S. Pirozzoli
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: alessandro.dimarco@uniroma3.it
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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.

JFM classification

Compressible Flows: Compressible boundary layers Turbulent Flows: Turbulent boundary layers
Type
Papers
Information
Journal of Fluid Mechanics , Volume 732 , 10 October 2013 , pp. 445 - 456
Copyright
©2013 Cambridge University Press 

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