Application of the DLR Tau Code to predict acoustic damping rates in generic combustion chamber configurations

Abstract

The DLR Tau code was used to predict the acoustic damping rates in the two dimensional generic combustion chamber configurations of the REST test case HF1 step 1 to 3. The aim of the present study was to assess the applicability of the compressible Navier-Stokes solver Tau using an upwind scheme on unstructured grids for the prediction of acoustic damping. Auxiliary numerical analysis of step 1 and 3 of the HF1 case was performed using the DLR structured Navier Stokes solver Flower applying a low-dissipation central scheme. Good agreement with analytical and other reference solutions was achieved for all considered test cases and both numerical methods.