Evaluation of Convective and Radiative Heat Transfer on the Front Surface of Super Orbital-Velocity Reentry Body

The convective and radiative heat transfer rates are calculated over the super-orbital reentering body surface like the MUSES-C capsule. Thermally and chemically nonequilibrium 11-species (O2, N2, O, N, NO, O+2, N+2, O+, N+, NO+ and e-) air is considered using Park's two temperature model. Chemical species number densities and temperature distributions are obtained by solving the Navier-Stokes equations and the vibrational-electronic energy conservation equation, using a Harten-Yee-type upwind TVD scheme. For the isothermal wall condition the minimum grid interval is set to 1μm in order to maintain the cell Reynolds number of O(1). The radiative heat transfer rate is calculated by integrating the radiative heat transfer equation using emission and absorption coefficients that are determined by NEQAIR (Nonequilibrium Air Radiation) and SPRADIAN (Structured Package for Radiation Analysis). Those results are compared with convective heat transfer rate.