Modélisation du rayonnement acoustique de jets coaxiaux supersoniques

Abstract

We examine the elimination of the Mach waves radiated by a supersonic jet by the addition of a secondary coaxial jet. The noise prediction is based on a numerical solution of the RANS (Reynolds Averaged Navier–Stokes) equations closed by a turbulence model, and a statistical description of acoustic sources. This method allows us to numerically reproduce results obtained in recent experiments where the aim was to find the mean flow configuration that minimizes acoustic radiation.