大气等离子体中负氧离子产生和演化过程数值模拟

摘要

文章利用数值模拟程序对不同条件下大气等离子体中负氧离子的形成及演化过程进行数值模拟.结果发现：负氧离子数密度衰减过程中出现拐点,进入一个较为平稳的状态;平稳期负氧离子数密度与初始电子数密度近似成线性关系;水分含量对负氧离子的演化过程具有重要影响,水分含量越高,负氧离子或其团簇数密度平稳期后的衰减越缓慢.%The generation process and temporal evolution of negative oxygen ions in a atmospheric plasma are numerically simulated in this paper.The results show that there exists a knee point in the attenuation process of negative oxygen ions,followed by a long time stationary phase.The density of negative oxygen ions in the stationary phase has a linear relation with the initial electron number density.Moisture content has a large effect on the temporal evolution of negative oxygen ions.