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发表时间：2021-01-01

发表刊物：Yuhang Xuebao/Journal of Astronautics

所属单位：运载工程与力学学部

卷号：42

期号：5

页面范围：634-641

ISSN号：1000-1328

摘要：Based on the Direct Simulation Monte Carlo (DSMC) method, Immersed Finite Element (IFE) method, Particle-in-cell Monte Carlo Collision (PIC-MCC) method and Ammosov-Delone-Krainov(ADK) tunneling ionization model, a three-dimensional simulation model for the carbon nanotube (CNT) array thruster is established. The validity of the simulation model is verified by comparison with experimental data in literature. The results show that the simulation model is in agreement with the experimental results. Then the discharge characteristics of the carbon nanotube array thruster are studied, and the influence of collisions is also analyzed. The results show that CNT can greatly enhance the local electric field, and the field enhancement factor in steady state is about 1308; the collision with atoms makes ions more concentrated near the CNT tip, thus reducing the local electric field and its field enhancement ability. © 2021, Editorial Dept. of JA. All right reserved.

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