STRATEGIES FOR THE EVALUATION OF THE FLUID-DYNAMIC ACOUSTIC POWER PRODUCED BY AN ORIFICE

A novel approach to numerically estimating the acoustic power produced by gas flow through control devices is presented. The procedure is based on the simulation of stationary fluid flow by means of the Reynolds Averaged Navier-Stokes (RANS) equations employing Computational Fluid Dynamics (CFD) techniques. An appropriate expression for the acoustic power density as defined by existing literature allows to obtain the acoustic power by integrating over an aptly-defined source region. A discussion of the results obtained for a single-hole orifice plate through the proposed and the reference international standards’ procedure follows.