COMPUTATION OF WALL PRESSURE SPECTRA FROM CFD RANS SOLUTIONS INDUCED BY INCOMPRESSIBLE TURBULENT BOUNDARY LAYERS

Abstract

A method is developed to compute the wall pressure spectrum under a turbulent boundary layer based on RANS solutions. HighReynolds number flows, such as the ones encountered in naval architecture studies, are considered. The model solves a specific equation for the wall pressure, based on the integral solution of a Poisson equation. A new model is proposed, the Extended Anisotropic Model (EAM), for the space-time velocity correlations which are necessary in order to close the equation. The method is applied to a turbulent boundary layer flow over a flat plate and satisfying results are obtained for the frequency pressure spectrum.