首页|Kinetic effects of nanosecond discharge on ignition delay time☆
Kinetic effects of nanosecond discharge on ignition delay time☆
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The effects of nanosecond discharge on ignition characteristics of a stoichiometric methane–air mixture without inert diluent gas were studied by numerical simulation at 0.1 MPa and an initial temperature of 1300 K. A mod-ified non-equilibrium plasma kinetic model was developed to simulate the temporal evolution of particles pro-duced during nanosecond discharge and its afterglow. As important roles in ignition, path fluxes of O and H radicals were analyzed in detail. Different strength of E/N and different discharge duration were applied to the discharge process in this study. And the results presented that a deposited energy of 1–30 mJ·cm?3 could dramat-ical y reduce the ignition delay time. Furthermore, temperature and radicals analysis was conducted to investigate the effect of non-equilibrium plasma on production of intermediate radicals. Finally, sensitivity analysis was employed to have further understanding on ignition chemistries of the mixture under nanosecond discharge. ? 2016 The Chemical Industry and Engineering Society of China, and Chemical Industry Press. Al rights reserved.