PREDICTION OF BOUNDARY LAYER PRESSURE FLUCTUATIONS

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Abstract
The pressure fluctuations beneath equilibrium boundary layers at subsonic and supersonic speeds are reviewed. Empirical formulae are presented for the intensity, spectra, and cross spectra of the fluctuations. The formulae are intended for direct use in structural response calculations. A simple theoretical model to predict intensities at supersonic speeds is put forward, and the effects of nonequilibrium boundary layers are discussed in general terms. An appendix gives theoretical justification for negative exponential correlation curves at large spacings. (Author)

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