Search Results

An engine is described that operates exclusively on stoichiometric H2-O2 mixtures with significant amounts of excess hydrogen circulated to effect controlled combustion of excessively rich mixtures within the engine cylinder combined with exhaust water condensation and removal. A two-zone quasi-dimensional model for predicting the performance and the likelihood of the onset of knock developed earlier for CH4-H2-air operation has been extended suitably to predict the approximate performance of this H2-O2 engine arrangement. A detailed chemical kinetic scheme for the oxidation reactions of H2-O2 mixtures is adopted in the knock prediction of this model. A prior knowledge of the variation of the combustion period needed for this predictive model was estimated through processing corresponding data for H2-air mixtures. The limited experimental results reported by Furuhama, et al., were used to validate the corresponding predicted values.