Abstract
Abstract : Analytical and experimental investigations of the ignition and combustion of hydrogen-oxygen-argon mixtures are presented. A one-dimensional kinetics program with generalized chemistry and provisions for mass addition, momentum addition, heat loss, mixing, shock waves, and a rate screening option has been developed and used to analyze the effect of free radical additives on the ignition delay time in hydrogen-oxygen mixtures. The computer program has also been used to reduce shock tube measurements of hydrogen-oxygen ignition delay and OH doublet Sigma-doublet Pi emission. The experimental results indicate that the reaction O+H(+M) yielding OH*(+M) is responsible for producing OH(doublet Sigma) during the induction period; however, this mechanism, when input into the computer program, was not sufficient to qualitatively reproduce OH emission intensity profiles obtained experimentally. Work aimed at determining the mechanism for OH emission throughout the reaction zone is continuing.
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