Turbulence-Resolving Simulations of a Coaxial Jet Based on Reynolds-Stress Modelling

Kurzfassung

This study deals with turbulence-resolving simulations of a coaxial jet configuration from the CoJeN project using a novel hybrid RANS-LES methodology. Particular attention is paid to the accuracy of the hybrid simulations. Therefore, a Reynolds-stress background model is employed in connection with the Improved Delayed Detached Eddy Simulation method (RSM-IDDES). Additionally, in order to achieve highest possible consistency with experimental data, the turbulent intensity within the engine is carefully adjusted. The study provides a detailed quantitative comparison of velocity as well as Reynolds-stress profiles of RANS, IDDES and experimental data. Finally, the study confirms that the new RSM-IDDES is suitable for accurately simulating jet flows.