再入航天器周围等离子体分布特征研究  

Research on Characteristics of Plasma Distribution Around Reentry Spacecraft

作　　者：吴祥东 车学科 狄辉 韦洋红 WU Xiang-Dong;CHE Xue-Ke;DI Hui;WEI Yang-hong(Department of Aerospace Science and Technology Space Engineering University Beijing101416,China)

机构地区：[1]航天工程大学宇航科学与技术系,北京101416

出　　处：《机电产品开发与创新》2021年第5期100-104,共5页Development & Innovation of Machinery & Electrical Products

摘　　要：航天器再入过程中的黑障现象与其周围等离子体分布密切相关。守恒形式的纳维-斯托克斯方程模拟了再入航天器周围产生的等离子体。利用七组分化学反应模型计算等离子体中包括电离在内的单个组分的密度,并将等离子体电子数密度与实验进行比较,结果基本吻合。分析了不同飞行高度下等离子体分布参数的变化,分析了飞行速度、来流压强以及航天器构型对航天器头部等离子体厚度及峰值电子数密度的影响,为研究黑障并减轻黑障对飞行安全的影响提供了一定思路。The blackout during the reentry of the spacecraft is closely related to the plasma distribution around it.The Navier-Stokes equation in conserved form simulates the plasma generated around the reentry spacecraft.The seven-component chemical reaction model is used to calculate the density of individual components in the plasma,including ionization,and the electron number density of the plasma is compared with the experiment.The results are more consistent.The changes of plasma distribution parameters at different flight altitudes are analyzed,and the effects of flight speed,incoming flow pressure and aircraft configuration on the plasma thickness of the aircraft head and peak electron density are analyzed.It provides certain ideas for studying blackout and reducing the impact of blackout on flight safety.

关 键 词：等离子体 黑障 纳维-斯托克斯方程 RAM CII航天器 电子数密度 

分 类 号：V419[航空宇航科学与技术—航空宇航推进理论与工程]