Abstract
The paper deals with the numerical simulation of a supersonic viscous flow containing CO2 molecules near a space body entering the Mars atmosphere. The gas dynamic equations in a shock layer are coupled to the equations of vibrational and chemical kinetics in the mixture CO2/CO/O2/C/O using three theoretical models for CO2 vibrational excitation. Three‐temperature and two‐temperature non‐equilibrium approaches as well as the one‐temperature thermal equilibrium model have been applied. A comparison of gas flow parameters and heat transfer calculated on the basis of different approximations is presented, and the effect of CO2 vibrational non‐equilibrium is discussed. Transport coefficients in a flow are computed using rigorous kinetic theory algorithms which have been incorporated directly to the numerical schemes. The effect of bulk viscosity in a shock layer is studied.
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