固体火箭技术2016，Vol.39Issue(2)：194-200,7.DOI:10.7673/j.issn.1006-2793.2016.02.008
脉冲等离子体推力器放电电离特性的数值研究
Numerical analysis on ionization characteristics in pulsed plasma thruster discharge
摘要
Abstract
Ionization process of propellant ablation products plays a vital role in pulsed plasma thruster ( PPT) . Its effects on plasma generation and behaviors directly determine the PPT performances. To accurately describe the ionization characteristics in PPT discharge, a dynamic coupling model of ablating boundary layer and plasma layer was presented on the basis of thermochemical reaction. Numerical solutions of LES-6 PPT using this model were studied, and the ablation process of PTFE excited by current pul-ses and the temporal and spatial variation of the different plasma species in the discharge channel were revealed. It is found that plasma is mainly composed of monovalent ions, of which carbon ions and fluorine ions are focused on the upstream and downstream discharge chamber, respectively. A large number of short-lived and highly ionized ( divalent and trivalent ions) carbon and fluorine species are created in initial stage, and results of peak time of the various plasma species show a good agreement with plume experi-mental data. It is valuable for theoretically studying the discharge energy distribution and loss mechanism in PPT.关键词
电推进/脉冲等离子体推力器/烧蚀/电离Key words
electric propulsion/pulsed plasma thruster/ablation/ionization分类
航空航天引用本文复制引用
杨磊,刘向阳,汤海滨,黄玉平,王宁飞..脉冲等离子体推力器放电电离特性的数值研究[J].固体火箭技术,2016,39(2):194-200,7.基金项目
中国博士后科学基金(2015M570918)。 （2015M570918）
