Abstract
This paper describes laboratory experiments of effect of wall catalysis on aerodynamic heating in high- temperature gases. Heat fluxes on two kinds of catalytic material, stainless steel and alumina ceramic, were measured in an arc-heated wind tunnel. Stainless steel was considered as near fully catalytic material whereas alumina ceramic was selected as non-catalytic material. In order to investigate the effect of wall catalysis, heat fluxes were measured in three different arc-keated gases, argon, nitrogen and air. Measured results showed that the stainless steel to alumina ceramic heat flux ratios for air were 38% larger than those for argon and nitrogen. This implies that the recombination of oxygen atoms on the wall due to catalysis of wall material partly controls heat flux.
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