Analysis of subsonic premixed turbulent reacting flow in a backward-step combustor using PaSR models

An example of Partially Stirred Reactor (PaSR) models application within RANS framework to the description of flows with turbulent combustion is presented. P. Magre et al. experiment of a methane/air premixed combustion in a subsonic flow in duct with a reverse step is simulated numerically. The focus is on Turbulence/Combustion Interaction contribution, on the analysis of combustion stabilization mechanism and on arising in calculations oscillations study. Influence of turbulent transport coefficients is considered. The simulation results are compared with the experiment and with calculations by other authors. Preliminary results of LES calculations are presented.