Abstract

The paper presents a quasi-stationary model for dissociation, recombination and vibrational kinetics in a nozzle expansion of (N 2, N) mixture. The model is based on strongly non-equilibrium non-Boltzmann and non-Treanor vibrational distributions. The closed set of equations for gas dynamic parameters is derived, the flow field parameters and vibrational distributions are computed in different sections of the nozzle for various reservoir conditions. The influence of vibrational distributions on gas parameters in the nozzle is discussed as well as the dissociation–recombination effects.

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