A new viewpoint on ablation mechanism discrimination

The ablation is coupled with chemistry, heat and mass transfer. Based on multidisciplinary theories, the heat flow field and the ablation loss are studied with the given gaseous mixture and assumed activation energy of H(2); Furthermore, the formula for impaction effect of a single particle are deduced with an elastic impact theory, by which the most dangerous attack angle can be obtained. As results prove, the most fragile part may be the convergence region in front of the throat, and then the concentration and the activation energy of H(2) determine the ablation mechanism discrimination in the most fragile part.