Temperature Dependence of Hydrogen/Air and Methane/Air Deflagration

This study presents a detailed analysis of the combustion dynamics of hydrogen and methane air mixtures at temperatures ranging from 298 K up to 423 K and at stoichiometric ratio, integrating experimental data of the pressure‐time histories obtained in a 20-liter closed vessel and detailed kinetic simulations by using three independent mechanisms: KiBo_MU from University of Bologna; a detailed chemical kinetic mechanism from University of San Diego; and a mechanism from Lund University. Key parameters, including the maximum explosion pressure (Pmax), the maximum rate of explosion pressure rise (dP/dt)max and the laminar burning velocity (LBV), were evaluated. The study provides some insights into combustion dynamics within the given temperature range, thus offering a comparative evaluation of the predictive accuracy of current kinetic models and laminar burning velocity correlations.