热平衡等离子体的二维复合流动数值计算

Numerical calculation of thermal-equilibrium plasma composite flow with two-dimension

关键词:  微波  等离子体发动机  欧拉方程  热平衡  电子密度  数值计算

Key words:  Microwave  Plasma engine  Eular equation  Heat balance  Electron density  Numerical calculation

摘要:

采用中性气体流动欧拉方程的近似因子分解法,耦合等离子体的热平衡模型方程,对用微波产生的等离子体在喷管内二线轴对称复合流动进行了数值计算。计算结果表明:微波等离子体电子数密度不超出临界值,1kW以下功率微波产生的是弱电离等离子体;气流的马赫数分布不受微波加热功率、喷管入口压强的影响,喷管内等离子体中电子数密度随微波功率的加大而增加,随入口压强的增加而减小。

Abstract:

With the approximate-factorization algorithm of Eular equation describing the neutron gas flow fields, coupling with the thermal equilibrium model equation of plasma, the composite fluid fields of plasma, flowing in two dimensional axial asymmetry nozzle after generated by microwave, were numerically calculated. The results show that the numerical density of electron is less than critical value, the microwave energy power under IkW produces weak plasma, the Mach number distribution is not effected by the power and the pressure of nozzle entrance, the numerical density of electron is increased with the increasing of microwave power and the decreasing of entrance pressure.