Abstract

Application of an approximate theory of nonequilibriu m stagnation-poi nt boundary-laye r flow on highly cooled blunt bodies, including a finite atom recombination rate on the surface, is presented. The analysis is based on the fact that recombination near the cold wall dominates the nonequilibrium behavior. Closed-form solutions for the atom concentration at the wall and heat transfer are obtained in terms of a composite Damkohler number representing the combined effects of homogeneous and heterogeneous reaction, in good agreement with the numerical results of Fay and Riddell. The use of this theory in parametric studies of nonequilibrium heating sensitivity to various design parameters is discussed in detail.

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