One-dimensional performance calculation of dual mode scramjet combustor based on flamelets and jet model

A one-dimensional analysis code coupled with the flamelets model was established to rapidly obtain the parameter distribution in a dual-mode scramjet combustor. A jet model was used to acquire the three-dimensional distribution of the time averaged and fluctuating fuel mixture fraction, and time averaged equivalent scalar dissipation rate in the combustor. The distribution of combustion species and heat release were obtained through the flamelets model. The three dimensional information was added into the one-dimensional unsteady calculation model by integrating the cross section area of the flow channel. The one-dimensional parameter distribution was obtained by solving the flow governing equations. Subsequently, several examples of verification show that this method overcomes the adverse effect of the three-dimensional fuel jet, and can well predict the wall pressure profiles in the combustor.