Monte Carlo simulation of the effect of 'hot' atoms on active species kinetics in combustible mixtures under high-voltage pulsed discharges

摘要

Energy degradation of fast H and O atoms in H_2:O_2, CH_4:O_2 and CH_4:air mixtures is studied with Monte Carlo simulation taking into account elastic collisions and chemical reactions. Based on the simulated results, the effect of high-energy atoms on the amount and composition of chemically active species produced in high-voltage pulsed discharges is estimated. The obtained results are used to consider the contribution of "hot" atom production to ignition and oxidation of fuel in combustible mixtures under non-equilibrium plasmas. It is shown that the presence of high-energy atoms leads to a decrease in the specific deposited energy required for plasma-assisted ignition and to an increase in the density of products of plasma-assisted oxidation at room gas temperature. Monte Carlo simulation; atom energy degradation; active species production; high-voltage pulsed discharge.