Mechanism Analysis of Non-Equilibrium Plasma Effects on Ignition and Flame Propagation of Methane/Air Mixture
In order to explore the physical mechanism of non-equilibrium plasma on ignition and flame propagation of methane/air mixture,based on GRI-Mech3.0,the ignition and flame propagation were carried out with the mode of the closed zero dimension homogeneous batch reactors and flame speed.The calculation revealed influencing rule of radicals (O and NOx) in non-equilibrium plasma on ignition delay time and flame spreading speed of methane/air mixture.The numerical results indicate that the ignition time is reduced by about 94.7%,63.1% (adding NO) and 94.2% (adding NO2) by adding radicals of the 0.5% O and 0.5 % NOx.By using reaction path analysis and sensitivity analysis,the results have revealed the detailed kinetic mechanism for the effects of radicals resulted from non-thermal equilibrium plasma on the ignition and flame propagation of methane/air.