空气放电非平衡等离子体的模拟计算

Calculation of non-equilibrium plasma under air discharges

基于空气放电非平衡等离子体动力学,对空气放电进行了数值计算,分析了放电后等离子体中的主要粒子(N2(v6),N2(A3),O2(a1),O和O3)数密度随起始温度、电子数密度和约化场强的变化趋势。计算结果表明,随着初始温度的升高,空气放电产生的粒子数密度增加。温度为300 K时,放电产生的O原子数密度最大值约为4.90×107cm-3,而当温度升高到400 K和500 K时,O原子数密度的最大值则相应地增加到5.2×1010cm-3和5.51×1010cm-3。约化场强的影响与温度类似,其中氮气的振动激发态N2(v6)数密度随约化场强的变化幅度不明显。电子数密度增加,粒子数密度大幅增加,氮分子的激发态N2(A3)粒子数密度与电子数密度保持严格的线性关系。

Number densities of active particles（N2（v6）,N2（A3）,O2（a1）,O and O3） in non-equilibrium plasma were calculated and analyzed under the condition of air discharges with various initial temperatures,reduced electric fields and electron number densities.The results show that,the density of active particles increases with the rising of initial temperature,and the maximum number density of oxygen atom is 4.90×107,5.2×1010 and 5.51×1010 cm-3,when the initial temperature is 300,400 and 500 K,respectively.The density of active particles also increases with the reduced electric field increasing,while the number density of vibrantionally excited N2 varies far less significantly.Moreover,the number density of particles increases when the electron number density increases,and there is a clear linear relationship between the number density of excited N2 and electron number density.