Abstract: Using computational fluid dynamic methods, this paper simulated nozzle array with high energy N2 as carrier gas. The results indicate that using high mach number N2 to eject low Mach number O2, the stagnation pressure at cavity exit can be enhanced. The process of mixing hypersonic N2 with sonic O2 is very slow, installing mixing tabs at nozzle exit can enhance the mixing. Installing coarse tabs can get relatively uniform flowfield. Through chemical reaction with 10 species and 21 reactions, the paper simulated the mixing and reacting processes of multi-species in the cavity. Preliminary simulation results show that chemical reactions take place in the cavity, generating excited and basic-state iodine atoms. The cavity obtains positive gain and the total pr