GAS-DYNAMIC PROBLEMS CAUSED BY THE GENERATION OF THE RADICALS IN A SUPERSONIC JET

A simplified one-dimensional model was proposed to treat the gas dynam ic problems in a supersonic jet, which was used to produce radicals co oled by supersonic expansion. Based on this model, the gas dynamic equ ations can be integrated directly to obtain the evolution of the trans lational temperature and the rotational temperature of free radicals a s well as the molecule density. The results show that the heating posi tion where the radicals are generated and the initial rotational tempe rature of radicals have little effect on the rotational temperature at the down stream detection point, if the heating position is close to the nozzle orifice.