Numerical simulation on aerospike nozzle flow field with chemical non-equilibrium reaction

Based on 7-species, 8-reaction and 6-species, 8-reaction finite-rate chemical models for plug and cell combustion process, the distribution of H₂/O₂ aerospike nozzle flow parameters, mass fractions and thermo-dynamical parameters were numerically simulated. Chemical non-equilibrium and frozen flow fields were compared. It is shown that for low velocity and high temperature in boundary layer and base region, mass density of O₂, H₂, O, H, OH is higher but H₂O lower compared with that in main stream. Adiabatic exponent is raised and gas content is fallen when temperature is decreased. It is found that ambient air affects plug flow field within the range of shear layer and has no great influence on the main stream.