Study on mixing process assessment method in solid ramjet

Combustion properties of afterburning chamber have close relationship with mixing process. In order to understand multiphase jet mixing process with air in solid ramjet, study multiphase jet transport diffusion mechanism, and improve our understand of mixing and combustion, an accurate numerical simulation software of multiphase jet mixing process with air flow in the solid ramjet afterburning chamber based on mature commercial software was developed. A calculation model of afterburning chamber multiphase turbulence mixing process was built with simulation error less than 5% compared with experiment. On this basis, the concept of particles mixing degrees, gas mixing degrees and the local oxygen fuel ratio were put forward, and the multiphase turbulent mixing diffusion process assessment methods were established. Quantitative calculation of the mixing degree of any point in afterburning chamber was achieved, which provided the foundation for enhancing mixing process and theory of mixing and combustion of afterburning chamber.