computing fluctuating pressures

Doug

Hello. We are currently looking at trying to determine the Overall Sound Pressure levels experienced in a ram/scramjet engines and we need a way to calculate the rms fluctuating pressure intensity. We have some experimental correlations, but it would be useful to be able to also compute rms pressure values from CFD solutions we are doing.

Since we don't have the time or resources to do unsteady calculations (like LES), we would like to be able to extract rms pressure from the steady turbulent solutions we plan to do.

Does anyone have any ideas that could help that you have used or read about? Thanks in advance for your input.