Thermo-chemical nonequilibrium effects on the aerothermodynamics of aerobraking vehicles

摘要: A three-dimensional computational fluid dynamics algorithm is developed to study the effect of chemical and thermal nonequilibrium on blunt body aerodynamics. Both perfect gas five species air reacting models are used compute flow over Apollo command module. The mixture assumed be governed by a translational-rotational temperature vibrational temperature. Navier-Stokes computations compared wind-tunnel flight-aerodynamic data from missions. effects reaction excitation lift-to-drag ratio trim angle investigated. It shown that including real results in lower L/D than predicted nonreacting simulations. numerical consistent with flight unmanned AS-202 mission, whereas agree extrapolated preflight results.