Abstract
The description of combustion in high-speed turbulent flows where turbulent mixing, compressibility effects and chemical kinetics processes are competing, still remains a challenging issue for numerical simulations. The key features of such turbulent supersonic reactive flows are highlighted and integrated into a new turbulence-chemistry interaction (TCI) model which relies on the partially stirred reactor (PaSR) framework. The corresponding model, hereafter denoted PaSR model, is integrated into the ONERA CFD code CEDRE. Preliminary results are reported and discussed. An extended closure denoted EPaSR (Extended PaSR) is also introduced. It features the ability to capture both unsteady and convection effects thus extending the PaSR closure. The corresponding effects are expected to play a crucial role in the ignition and stabilization processes associated with non-premixed supersonic turbulent flames. A Mach 2 hydrogen-air coflowing jet diffusion flame experiment is retained as a validation test case. The preliminary results of Reynolds Average Navier Stokes (RANS) numerical simulations based on the EPaSR concepts are presented.
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