Nonequilibrium radiative heating of a Jovian entry body

Astronomy and Astrophysics – Astronomy

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Aerodynamic Heating, Atmospheric Entry, Jupiter Atmosphere, Nonequilibrium Radiation, Radiative Heat Transfer, Thermodynamic Equilibrium, Absorptivity, Axisymmetric Flow, Charged Particles, Chemical Equilibrium, Convective Heat Transfer, Deactivation, Iterative Solution, Plancks Constant, Relaxation Time, Shock Layers, Temperature Distribution, Viscous Flow

Scientific paper

The influence of nonlocal thermodynamic equilibrium (NLTE) radiative transfer on radiative and convective heating of a Jovian entry body is investigated. The flow in the shock layer is assumed to be axisymmetric, viscous, and in chemical equilibrium. The chemical species considered for the collisional deactivation processes are H2, H, H+. The NLTE radiative transfer equations are derived for multilevel energy transitions. The rotational and vibrational energy modes are assumed to be in local thermodynamic equilibrium. The results indicate that higher-level energy transitions have little influence on the overall NLTE results. The NLTE results, however, are found to be greatly influenced by the temperature distributions in the shock layer. The convective and radiative heating to the entry body are reduced significantly because of the NLTE conditions; the reduction in convective heating, however, is relatively small. The influence of NLTE is found to be greater at higher entry altitudes.

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