空气等离子体双温度输运性质计算

Transport Properties of a Two-Temperature Air Plasma

本文采用将经典的Chapman-Enskog方法扩展到高阶近似的方法计算获得了双温度化学平衡条件下空气等离子体的粘性、热导率和电导率。结果表明,压力和热力学非平衡程度的改变会影响空气组分解离和电离反应的温度区间,从而使气体的粘性和热导率的峰值区域产生变化。局域热力学平衡条件下空气等离子体输运性质的计算结果与文献报道结果符合较好,验证了本文结果的可靠性。

The calculations of two-temperature transport coefficients of air plasma,including viscosity,thermal conductivity and electrical conductivity,are carried out using classical Chapman-Enskog method expanded up to higher approximation,under the conditions of chemical equilibrium.The results show that the variations of pressure and thermal non-equilibrium parameters affect the temperature ranges of dissociation and ionization reactions,resulting in the peak area change of the viscosity and thermal conductivity.Within the local thermodynamic equilibrium(LTE) regime,the results are compared with published data and an overall good agreement is observed.