| Abstract: | ![]()
A study is made of the transport processes in the boundary layer on a graphite surface in a stream of dissociated air. The diffusion and sublimation ablation regimes of the grahite are considered. In contrast to earlier investigations [1, 3], allowance is made for a larger number of components in the boundary layer, the multicomponent nature of the diffusion, and the disequilibrium of the chemical reactions in the gas phase. On the basis of a critical analysis of the experimental and theoretical investigations of the intermolecular interaction potentials, a model is chosen that makes it possible to calculate the transport properties of gas mixtures containing ablation products with satisfactory accuracy. The results of the numerical investigation of the problem were used to obtain the dependences of the characteristics of heat and mass transfer on the stagnation parameters of the oncoming flow and the temperature of the surface. The influence of the extent to which the chemical reactions are in disequilibrium on these characteristics is estimated. The results of the calculations are presented in the form of approximation formulas. The method of numerical solution is described elsewhere [4, 5].Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 3, pp. 97–103, May–June, 1983. |
