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

A prediction model for turbulent axisymmetric diffusion flames with equilibrium and nonequilibrium hydrogen-air kinetics is presented for supersonic jet flows. The model predictions are compared to probe measurements in a supersonic H2-air jet flame by Beach (Evans et al., 1978). Comparison of the mixture fraction deduced from Beach's data to the model results indicate that the model overpredicts the turbulent mixing. Predictions of the major species concentrations are nearly identical for the equilibrium and nonequilibrium models. The nonequilibrium model predicts substantial superequilibrium of the minor species.