Abstract

The effects of a SiO2 partially catalytic surface on the nonequilibrium chemical and vibrational kinetics of a Ž ve-species (N, N2, O, O2 , NO) air mixture in the boundary layer of hypersonic reentry vehicles have been investigated. To this aim, boundary-layerequationscoupled to vibrationalmaster equations have been solved. The surface atomic recombination reactions have been considered as pumping the last bound vibrational level of N2 and O2 molecules. The results show a combined in uence of gas-phase and surface reactions on NO formation.

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