RADIATION TRANSPORT FOR STAGNATION FLOWS INCLUDING EFFECTS OF LINES AND ABLATION LAYER

Efficient numerical methods are developed for fully radiation- coupled, inviscid, stagnation flow. Application of the numerical methods is described. The effects of exponential kernel approximation, continuum band models, line calculation options, number of air and ablation-layer subdivisions, environmental variable, and perturbation of radiative properties are investigated. The results indicate that the ablation layer is very effective in reducing the wall heat flux and that self-absorption and energy- loss effects reduce the sensitivity of the wall radiative flux to environmental variables and to uncertainties in radiative properties.