The influence of inhibitors on the normal rate of combustion of rich near-limit hydrogen-containing mixtures

The normal rate of combustion Sui of rich near-limit hydrogen-oxidizing medium-retarder mixtures was determined experimentally. The oxidizing medium was a mixture of nitrogen and oxygen with oxygen contents of 15, 20.6, and 25 vol%; the retarding agents were trifluoromethane CF3H, pentafluoroethane C2F5H, and perfluorobutane C4F10, and the inhibitor was AKM. Deviations from the empirical rule of approximately constant normal rate of combustion of near-limit mixtures were observed. In the presence of pentafluoroethane, the dependence of Sui on the content of the retarder contained a pronounced maximum. The AKM inhibitor was found to be highly effective with respect to the combustion of near-limit mixtures in oxidizing media enriched in oxygen.