Abstract
The cross-correlated power spectrum of wall pressure fluctuations and the derivative of the turbulent velocity component normal to the wall is measured at a longitudinal coordinate; this spectrum, along with the mean shear, determines the contribution of the mean-shear-turbulence interaction to pressure fluctuations at a wall under a turbulent boundary layer. The spectrum is used to calculate the power spectrum and the transverse cross-correlated power spectrum of pressure fluctuations at the wall. Comparison of calculated and directly measured pressure spectra indicates that wall pressure fluctuations are almost completely determined by the mean-shear-turbulence interaction.
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