The explosion characteristics of methane, hydrogen and their mixtures: A computational study

摘要: The maximum pressure rise rate during gas explosions in enclosures and the deflagration index are important explosion characteristics of premixture. They can be used to quantify potential severity an explosion. However, there large discrepancies measured by different researchers for same methane/air or hydrogen/air mixture. In this study, outwardly propagating spherical flames a closed vessel simulated considering detailed chemistry as well temperature-dependent thermal transport properties. From simulation, methane, hydrogen their mixtures obtained. influence equivalence ratio, initial temperature on is examined. It found that has not been accurately previous experiments, experiments conducted cylindrical vessels have under-predicted greatly index. For hydrogen/methane with blending level above 70%, observed increase exponentially level. Moreover, affected pressure; while little Finally, based theoretical analysis we propose correlation calculate methane at broad range pressure. performance examined it demonstrated provide accurate prediction.