局部热力学平衡状态下的等离子体电导率计算

Electrical conductivity simulation of plasma based on local thermodynamic equilibrium

在Zollweg&Liebermann模型(Z&L模型)的基础上,结合高温条件下的量子机理作用,考虑了电子与中性粒子的碰撞关系,最终得出修正后的电导率模型,并对局部热力学平衡状态下的水中放电等离子体的粒子数密度及电导率进行了模拟计算.计算结果表明压力为定值的情况下,水中放电等离子体的总粒子数密度随温度变化呈下降趋势,温度达到15000 K时,一次电离达最大值.电导率随温度增加总体呈上升趋势,温度低于12000 K时,电子与中性粒子的碰撞起主导作用,而温度高于25000 K时,电子与离子的碰撞起主导作用.

Based on the Zollweg ＆amp; Liebermann model （ Z ＆amp; L model ） , combining with quantum mechanics which is under high temperature conditions , and considering the collisions between electron and neutral parti-cles, the modified electrical conductivity model is accomplished , and the particle number density and electrical conductivity of water plasma are calculated under the assumption of local thermodynamic equilibrium .The results show that under certain pressure , the total particle number density of water plasma decreases when increasing temperature, and primary ionization reaches a maximum when the temperature is 15000 K.The electrical con-ductivity of water plasma rises when increasing temperature .When the temperature is below 12000 K, the colli-sion of electrons and neutral particles play the leading role , while when the temperature is higher than 25000 K, the collision of electrons and ions play the leading role .