高温氮气电弧等离子体物性参数的计算分析  

Computation Analysis on Properties of High Temperature Nitrogen Arc Plasmas

作　　者：王伟宗[1,2] 荣命哲[1] Anthony B.Murphy 吴翊[1] 苏海博[1] 杨飞[1] 

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,西安710049 [2]英国利物浦大学电机工程与电子系 [3]澳大利亚联邦科学与工业研究组织材料科学与工程研究中心

出　　处：《高电压技术》2010年第11期2777-2784,共8页High Voltage Engineering

基　　金：国家自然科学基金(50907047/E070301)~~

摘　　要：等离子体的宏观特性与其内部的微观过程紧密联系在一起。研究电弧等离子体不同粒子组分构成以及对组分有强烈依赖关系的热力学参数、输运参数,将为深入了解电弧等离子体的形成机理奠定微观理论基础,并为利用磁流体动力学（MHD）仿真研究电弧特性提供前提条件。假定氮气电弧等离子体处于局部热力学平衡态（LTE）,介绍了求解电弧等离子体物性参数的基本原理,采用最新的配分函数计算方法和碰撞积分参数,给出了不同气压条件下（0.01、0.1、0.3、0.5和1 MPa）、不同温度范围内（300-40 000 K）氮气电弧等离子体热力学参数与输运参数的最新计算结果,并与以往文献中的部分结果进行了对比与分析。结果表明,氮气电弧等离子体热力学参数与输运参数的计算结果与文献中较近的计算结果十分接近;微小差别的产生,主要来源于配分函数和碰撞积分的差异。Macro features of plasma are closely related to its internal micro-processes.Calculating various plasma components as well as the thermodynamic and transport properties,which strongly depend on the former,not only lays the micro-theoretical foundation for a deeper understanding of the plasma formation mechanism,but also provides prerequisite data for the arc simulation adopting magnetohydrodynamic（MHD） model.Consequently,assuming local thermodynamic equilibrium（LTE）,we described the basic principles to calculate the properties of nitrogen arc plasmas.The recent method was adopted to obtain the partition functions and the updated data of collision integrals,and the new calculated results of thermodynamic properties and transport coefficients of nitrogen for 5 different pressures（0.01,0.1,0.3,0.5 and 1 MPa） in the temperature range from 300 K to 40 000 K were presented.Moreover,the results from recent literatures and those in this paper were analyzed and compared.The comparison indicates that the calculation in this paper yields very similar property values to the published data in other literatures,and the slight difference results from the adoption of different partition functions and collision integrals in this paper.

关 键 词：氮气 电弧等离子体 局部热力学平衡态(LTE) 配分函数 热力学属性 输运属性 

分 类 号：TM831[电气工程—高电压与绝缘技术]