Non-Equilibrium Supersonic CO2 Flows with Real Gas Effects near a Blunt Body

Computer Science

Scientific paper

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Supersonic And Hypersonic Flows, Kinetic And Transport Theory Of Gases, Rarefied Gas Dynamics

Scientific paper

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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