ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2022, Vol. 43 ›› Issue (3): 125272-125272.

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)

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.

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