Numerical simulation of non-equilibrium hypersonic CO2 flows for Mars entry application

Details Numerical simulation of non-equilibrium hypersonic CO2 flows for Mars entry application Numerical simulation of non-equilibrium hypersonic CO2 flows for Mars entry application

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.533..171r&link_type=abstract

In: Proceedings of the First International Workshop on Radiation of High Temperature Gases in Atmospheric Entry, 8-10 October 20

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Space Probes, Mars Atmosphere, Entry

Scientific paper

Analyses of the non-equilibrium flow field around several Mars probes have been undertaken. Axisymmetric Euler and Navier-Stokes solutions with CO2 thermochemistry models, catalytic and non-catalytic surface kinetics have been computed. The numerical approach is based on: 1) a detailed computation of thermodynamic properties of monoatomic and polyatomic species for CO2 derived mixtures by means of statistical thermodynamics; 2) diffusion fluxes are obtained by solving the Stefan-Maxwell equations; and 3) chemical non-equilibrium is described by a set of chemical reactions characterized by reaction rates for which data have been found in the literature. An initial analysis was performed using inviscid computations of the Viking geometry to better understand the finite-rate chemistry models. Viscous computations have also been performed and the results obtained using the VKI COSMIC hypersonic code are compared with published results for the MESUR geometry. Finally an entry condition for the MSRO configuration has been computed and some remarks about chemical demixing in boundary layers are presented in the last section.

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