Program Predicts Jet Noise

MGBK is a computer program that predicts the mixing noise and the shock noise generated by a subsonic or low-supersonic jet, given input data on the mean flow and turbulence fields as predicted by a suitable state-of-the-art computational fluid dynamics (CFD) program. More specifically, MGBK can be regarded as a post-processing program for use with a CFD program that computes a Reynolds-averaged Navier-Stokes solution with turbulence represented by a mathematical model of a type known in the art as "k — e" [in which k denotes the time-averaged kinetic-energy density associated with the local fluctuating (turbulent) component of flow, while e denotes the time-averaged rate of dissipation of this turbulent-kinetic-energy density]. The predictions generated by MGBK are in the forms of sound-pressure levels and frequency spectra on arcs or sidelines.