Study on plasma expansion model of primary discharge on spacecraft solar array  

作　　者：Dejie WEI Jianwen WU Liying ZHU 尉德杰;武建文;朱立颖(School of Automation Science and Electrical Engineering,Beihang University,Beijing 100191,People’s Republic of China;Institute of Spacecraft System Engineering CAST,Beijing 100094,People’s Republic of China)

机构地区：[1]School of Automation Science and Electrical Engineering,Beihang University,Beijing 100191,People’s Republic of China [2]Institute of Spacecraft System Engineering CAST,Beijing 100094,People’s Republic of China

出　　处：《Plasma Science and Technology》2024年第11期87-95,共9页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China (Nos. 51937004 and 51977002);sponsored by Beijing Nova Program (No. 20220484153)。

摘　　要：In the space plasma environment, primary discharge may occur on the solar array and evolve into a destructive sustained arc, which threatens the safe operation of the spacecraft. Based on the plasma expansion fluid theory, a new multicomponent plasma expansion model is proposed in this study, which takes into account the effects of ion species, ion number, initial discharge current, and Low Earth Orbit(LEO) plasma environment. The expansion simulation of single-component and multicomponent ions is carried out respectively, and the variations of plasma number density, expansion distance, and speed during the expansion process are obtained.Compared with the experimental results, the evolution of propagation distance and speed is closed and the error is within a reasonable range, which verifies the validity and rationality of the model. The propagation characteristics of the primary discharge on the solar array surface and the influence of the initial value on the maximum propagation distance and the propagation current peaks are investigated. This study can provide important theoretical support for the propagation and evolution of the primary discharge and the key behavior of the transition to secondary discharge on spacecraft solar array.

关 键 词：primary discharge plasma expansion propagation characteristics spacecraft solar array 

分 类 号：V442[航空宇航科学与技术—飞行器设计] TM914.4[电气工程—电力电子与电力传动]