为研究非平衡等离子体对氨气/空气在常温常压下燃烧的影响，利用CHEMKIN软件模拟实验条件下氨气/空气点火延迟时间，。使用ZDPlaskin程序包研究在常温常压下氨气/空气放电情况。将得到的O、H、OH自由基作为CHEMKIN初始条件，研究其对氨气/空气点火延迟时间的影响，分析点火时刻温度及活性自由基的敏感性。ZDPlaskin的研究结果表明，不同当量比混合气放电所产生的自由基粒子数密度相差不大。CHEMKIN的仿真结果表明，未加自由基，当量比在0.8~1.2时，点火延迟时间受当量比的变化影响较小，加入自由基后，点火延迟时间随当量比的减小而降低；O、H、OH自由基可明显降低氨气/空气点火延迟时间，降低程度随初始温度的升高而减小；相同初始温度下，反应方程式与温度敏感性最大的反应方程式相同，随着温度升高，敏感性最大的反应式将发生变化，并且敏感性大幅度降低；不同初始温度下，多个反应式在温度与自由基敏感性最大反应式中重复出现，这是机理简化的重要依据。

To investigate the effect of non-equilibrium plasma on the combustion of ammonia/air at ambient conditions, the CHEMKIN software was used to simulate the ignition delay time of ammonia/air under experimental conditions. The ZDPlaskin program was used to study the discharge of ammonia/air at ambient conditions. The resulting O, H, and OH radicals were used as the CHEMKIN initial conditions to study the effect on the ignition delay time of ammonia/air. The sensitivity of the temperature and active radicals at the ignition time were analyzed. The results from ZDPlaskin show that the number density of radical particles produced by discharge of mixtures with different equivalence ratios was similar. The simulation results of CHEMKIN indicate that without the addition of free radicals, the ignition delay time is less affected by the change of equivalence ratio when the equivalence ratio is 0.8 ~ 1.2. After the addition of free radicals, the ignition delay time decreases with the decrease of equivalence ratio. O. H and OH radicals can significantly reduce the ignition delay time of ammonia/air, and the degree of reduction decreases with the increase of initial temperature. At the same initial temperature, the reaction equation is the same as the reaction equation with the highest temperature sensitivity, as the temperature increases, the reaction equation with the highest sensitivity will change and the sensitivity will significantly decrease. At different initial temperatures, multiple reactions appear repeatedly in the reactions with the highest temperature and radical sensitivity, which is an important basis for simplifying the mechanism.