超低轨道稀薄气体与离子推进器羽流的相互作用研究  

Study on the interaction between rarefied gases in ultra-low orbit and ion thruster plume

作　　者：张涛 彭卫平[1,2] 马彦昭[1,2] 刘彬[1,2] 刘家侨 黄业军[1,2] ZHANG Tao;PENG Weiping;MA Yanzhao;LIU Bing;LIU Jiaqiao;HUANG Yejun(School of Power and Mechanical Engineering,Wuhan University,Wuhan 430072,China;Key Laboratory of Hydraulic Machinery Transients,Ministry of Education,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学动力与机械学院,湖北武汉430072 [2]武汉大学水力机械过渡过程教育部重点实验室,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2022年第5期517-524,共8页Engineering Journal of Wuhan University

基　　金：装备预研航天科技联合基金项目(编号:6141B061503)。

摘　　要：为研究超低地球轨道(ultra-low earth orbit,ULEO)环境气体对离子推进器返流的影响,将粒子网格(particle-in-cell,PIC)法与DSMC(direct simulation Monte Carlo)法相结合,采用可变硬球(variable hard sphere,VHS)模型,建立了稀薄气体与羽流相互作用的粒子模拟模型,对不同工况下氮气、原子氧与羽流的相互作用进行了仿真分析。结果表明,推进器羽流返流通量的变化与环境气体的来流方向相关,在相同条件下,超低地球轨道原子氧环境中的返流密度约为氮气环境中的85%。In order to study the influence of ultra-low earth orbit(ULEO) ambient gas on the reflux of the ion thruster, the particle-in-cell(PIC) method was combined with the direct simulation Monte Carlo method(DSMC), and the variable hard sphere(VHS) model was used. A particle simulation model of the interaction between the rarefied gases and thruster plume was established, and the interaction between nitrogen, atomic oxygen and plume under different working conditions was simulated and analyzed. The results show that the change of the ion thruster plume reflux is related to the incoming flow direction of the ambient gas. Under the same conditions, the reflux density in the ultra-low earth orbit atomic oxygen environment is about 85% of that in the nitrogen environment.

关 键 词：稀薄气体 超低地球轨道 羽流 粒子模拟 

分 类 号：V457[一般工业技术—材料科学与工程]