An Euler solver for the acoustic far‐field prediction of compressible jet flow

We report on a highly accurate Euler solver for predicting far‐field jet noise. The solver is based on a framework for Direct Numerical Simulation (DNS) / Large‐Eddy Simulation (LES) that provides the time‐dependent, noise‐generating flow field and the acoustic near‐field. The corresponding far‐field is then computed by solving the inviscid Euler equations in a conservative formulation which is discretized with compact finite differences. Numerical stability can be guaranteed by a spectrally selective filtering procedure developed in the context of subgrid‐scale modeling which is active only in the high wavenumber regime. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)