Numerical prediction of nonequilibrium hypersonic flow around Brazilian satellite SARA

AUTOR(ES)

Tchuen, Ghislain, Burtschell, Yves, Zeitoun, David E.

FONTE

Brazilian Journal of Physics

DATA DE PUBLICAÇÃO

2005-03

RESUMO

Hypersonic flows past Brazilian satellite SARA at zero angle of attack in chemical and thermal nonequilibrium are investigated using an axisymmetric Navier-Stokes solver. The numerical solutions were carried out for freestream conditions equivalent to a typically re-entry trajectory with a range of Mach numbers from 10 to 25. The gas was chemically composed by seven air species O;N;NO;O2, N2;NO+; e- with 24 steps chemical reactions scheme and thermically characterized by a multi-temperature model. Comparisons have been made between the present computation and the distribution of pressure coefficient and the heat transfer obtained recently with Direct Simulation Monte Carlo Method[1]. The study also points out the influence of nonequilibrium phenomena like ionization, vibrational and electronic excitation on aerothermodynamic flow parameters.

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