航空学报 > 2022, Vol. 43 Issue (3): 125272-125272   doi: 10.7527/S1000-6893.2021.25272

吸气式电推进系统进气道结构对进气性能的影响

谢晓乐1, 李济源3, 王娴1,2, 鲁海峰3, 韩先伟3   

  1. 1. 西安交通大学 航天航空学院 陕西省先进飞行器服役环境与控制重点实验室, 西安 710049;
    2. 西安交通大学 机械结构强度与振动国家重点实验室, 西安 710049;
    3. 西安航天动力研究所 陕西省等离子体物理与应用技术重点实验室, 西安 710100
  • 收稿日期:2021-01-15 修回日期:2021-02-02 出版日期:2022-03-15 发布日期:2021-03-09
  • 通讯作者: 王娴 E-mail:wangxian@mail.xjtu.edu.cn
  • 基金资助:
    国家数值风洞工程(NNW2019ZT2-B27)

Influence of air-intake structure in air-breathing electric propulsion system on intake performance

XIE Xiaole1, LI Jiyuan3, WANG Xian1,2, LU Haifeng3, HAN Xianwei3   

  1. 1. Shaanxi Key Laboratory of Environment and Control for Flight Vehicle, School of Aerospace, Xi'an Jiaotong University, Xi'an 710049, China;
    2. State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an 710049, China;
    3. Shaanxi Key Laboratory of Plasma Physics and Applied Technology, Xi'an Aerospace Propulsion Institute, Xi'an 710100, China
  • Received:2021-01-15 Revised:2021-02-02 Online:2022-03-15 Published:2021-03-09
  • Supported by:
    National Numerical Wind Tunnel Project (NNW2019ZT2-B27)

摘要: 吸气式电推进系统能收集高空稀薄气体作为推进剂,延长卫星的工作寿命,其关键性技术之一是进气道的结构设计。采用直接模拟蒙特卡罗(DSMC)法,数值研究了进气道长纵比、进气道出口锥角和栅格结构及其几何尺寸参数对进气道进气性能的影响规律。结果表明:提高进气道长纵比,能提高进气道的压缩比和收集效率,当长纵比为7时,压缩比和收集效率达到最大值,分别为200和0.65;增大进气道出口锥角,进气道的压缩比和收集效率呈现先增大后减小的变化趋势,出口锥角的理论最优值为70°;栅格结构能有效防止已捕获粒子从进口逸出,从而提高进气道的压缩比和收集效率,改变栅格板厚度对进气道的压缩比和收集效率影响不大,而增加栅格板的长度和层数,进气道的压缩比随之提高,但收集效率降低。

关键词: 吸气式电推进, 进气道, 栅格结构, 直接模拟蒙特卡罗, 粒子轨迹

Abstract: An air-breathing electric propulsion system can collect the rarefied gas as propellant and extend the operating life of the satellite.One of the key technologies of this system is the design on the air-intake structure.In this paper, using the Direct Simulation Monte Carlo (DSMC) method, the effects of the aspect ratio, the cone angle of the air-intake, gird structure and its geometric parameters on the intake performance were examined numerically.The results show that increasing the aspect ratio of air-intake leads to the enhancement of the compression ratio and collection efficiency of air-intake.When the aspect ratio is 7,the maximum of compression ratio and collection efficiency are obtained and they are 200 and 0.65 respectively.With the increase of cone angle of air-intake at exit, both the compression ratio and collection efficiency of air-intake increase first and then decrease.The theoretical optimal value of the cone angle at exit is 70°.The grid structure improves the compression ratio and collection efficiency of the air-intake by effectively preventing the captured particles from escaping from the inlet of air-intake.Changing the thickness of grid plate has little effect on compression ratio and collection efficiency of air-intake.With the length of grid plate and the layer number of grid plate increasing, the compression ratio of air-intake increases, while the collection efficiency decreases.

Key words: air-breathing electric propulsion, air-intake, grid structure, DSMC, particle trajectory

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