Modeling ideally expanded supersonic turbulent jet flows with nonpremixed H2-air combustion

Abstract

A prediction model for a turbulent axisymmetric diffusion flame with equilibrium and nonequilibrium hydrogen-air kinetics is presented for supersonic jet flows. For the first time, turbulence-chemistry interactions are included in a supersonic combustion model. In the finite rate chemistry analysis, the fast shuffle reactions in the H 2 -air reaction system are assumed to be in partial equilibrium and three-body recombination reactions are treated kinetically. The turbulence model consists of the Navier-Stokes equations in Favre-averaged form with a modified two-equation turbulence closure adapted for supersonic flows