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Measurements of the wave-number/phase velocity spectrum of wall pressure beneath a turbulent boundary layer

Published online by Cambridge University Press:  29 March 2006

J. A. B. Wills
J. A. B. Wills*
Affiliation:
Aerodynamics Division, National Physical Laboratory, Teddington
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Abstract

Measurements are presented of the wave-number/frequency and wave-number/phase velocity spectrum of wall pressure for a two-dimensional turbulent boundary layer in zero pressure gradient, obtained from a Fourier transform of experimental filtered spatial correlations. This method allows the results to be corrected for acoustic disturbances in the wind tunnel, and for finite transducer size. An empirical form for the pressure field is proposed, based on the measurements, and is used to predict a frequency spectrum correction for transducer size which agrees well with measured values.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 45 , Issue 1 , 15 January 1971 , pp. 65 - 90
Copyright
Copyright © Cambridge University Press 1971

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