A global model for evaluating discharge characteristics and performance of hollow cathodes

Feng TIAN, Long MIAO*, Qimeng XIA, Zhiwen WU, Ningfei WANG, Xiao HOU

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

2 引用 (Scopus)

摘要

Hollow cathode, with the highest plasma density, current density, and temperature, becomes one of the most important components in the electro-thruster system. As the electric-propulsion thruster performance is directly related to the ionization rate, reliability, and lifetime of the hollow cathode, this paper develops a global model to study the effects of discharge current, gas flow rate, and gas species on the discharge characteristics in the insert and orifice regions of the hollow cathode. The emitter wall temperatures of hollow cathodes predicted by the global model are compared with experimental results from NSTAR thruster neutralization cathodes, confirming the model's validity. The influence of hollow cathode emitter material and structure sizes on the plasma parameters in the internal regions was also evaluated. The simulation results show that there is an optimal matching relationship between the discharge current and gas flow rate to guarantee the maximum ionization rate. The optimal working region for the hollow cathode has been determined under different energetic, regime and structural parameters. The global model established in this paper can quickly determine the key structure and operating parameters of hollow cathode at the design stage, and provide the theoretical basis for hollow cathode design and development.

源语言英语
页(从-至)72-84
页数13
期刊Chinese Journal of Aeronautics
37
9
DOI
出版状态已出版 - 9月 2024

指纹

探究 'A global model for evaluating discharge characteristics and performance of hollow cathodes' 的科研主题。它们共同构成独一无二的指纹。

引用此