中文摘要：

本文基于零维均质着火系统研究了非平衡等离子中臭氧（O3）对甲烷／空气着火过程的影响，并通过化学反应路径分析揭示了O3促进甲烷／空气着火的化学反应机理。研究结果表明，O3促进甲烷／空气着火手要是通过化学反应动力学效应来实现的，热效应的影响十分有限。在不添加O3时，甲基的氧化速率缓慢，从而导致甲烷／空气不易着火；在添加O3后，甲基可以通过反应CH3＋O=CH2O＋H，CH3＋O=co＋H＋H2以及CH3＋HO2=CH3O＋OH被迅速氧化，因此O3能够促进甲烷／空气的着火。

英文摘要：

Numerical simulation of the homogeneous ignition process was conducted to assess the effects of O3 generated by non-equilibrium plasma on the ignition of methane/air mixture. Moreover, reaction-path analysis was conducted to find the kinetic mechanism of methane/air ignition enhancement by O3. It was found that the kinetic effect of O3 dominates in the ignition enhancement while tim thermal effect has little influence. The oxidization of CH3 is relatively slow without the addition of Oa which results in the slow ignition of methane/air. However, CH3 can be quickly oxidized through reactions CH3＋O=CH2O＋H, CH3＋O=CO＋H＋H2, and CH3＋HO2=CH3O＋OH when O3 is added. Therefore, Oaean accelerate the ignition of methane/air mixture.