Modeling of Chemical Kinetics in Pulse Combustors

Chemical kinetic modeling of the successive reignition of fuel-air mixtures is described, under conditions of pressure and temperature very similar to those encountered in conventional pulse combustion systems. The overall system model is described and the kinetic model is discussed in some detail. Computed results for ignition delay times are then related to time scales of interest in pulse combustion. From these comparisons, some of the physical and chemical factors which control the operation of the pulse combustor can be identified and quantified. In addition, the dependence of pulse combustor performance on various system parameters can be addressed, including the mass flow rate, fuel composition, presence of selected diluents and inhibitors, and combustion chamber geometry.