Numerical simulation and analysis of lithium plasma during low-pressure DC arc discharge  

作　　者：Runhui WU Song CHAI Jiaqi LIU Shiyuan CONG Gang MENG 邬润辉;柴忪;刘佳琪;从拾源;孟刚(National Key Laboratory of Science and Technology on Test Physics&Numerical Mathematics,Beijing 100076,People's Republic of China;School of Physics,Dalian University of Technology,Dalian 116024,People's Republic of China)

机构地区：[1]National Key Laboratory of Science and Technology on Test Physics&Numerical Mathematics,Beijing 100076,People's Republic of China [2]School of Physics,Dalian University of Technology,Dalian 116024,People's Republic of China

出　　处：《Plasma Science and Technology》2019年第4期16-21,共6页等离子体科学和技术（英文版）

摘　　要：Alkali metal DC arc discharge has the characteristics of easy ionization,low power consumption,high plasma temperature and ionization degree,etc,which can be applied in aerospace vehicles in various ways.In this paper,we calculate the physical property parameters of lithium vapor,one of the major alkali metals,and analyze the discharge characteristics of lithium plasma with the magnetohydrodynamic(MHD)model.The discharge effects between constant current and voltage sources are also compared.It is shown that the lithium plasma of DC arc discharge has relatively high temperature and current density.The peak temperature can reach tens of thousands of K,and the current density reaches 6 x 107 A m 2.Under the same rated power,the plasma parameters of the constant voltage source discharge are much higher than those of the constant current source discharge,which can be used as the preferred discharge mode for aerospace applications.

关 键 词：DC DISCHARGE LITHIUM PLASMA NUMERICAL simulation LOW-PRESSURE ARC 

分 类 号：TL[核科学技术]