Abstract
Unsteady two-dimensional simulations were performed for hydrogen/air mixtures in order to evaluate the effects of the detailed chemical reaction model on detonations. The reaction models in the present study are Petersen and Hanson model, and Koshi model. The pressure, specific heat release, and OH mass fraction are not affected by the reaction models, however, HO2 and H2 O2 mass fractions are dependent on them. These features also appear in the results of the zero-dimensional ignition simulation for the high pressure gas mixture. Therefore the chemical kinetic models for the high pressure affects the results of detonation simulations because the chemical properties in high pressure are significant different between them.
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