Simulation of Plume Distribution Characteristics of FEEP Thrusters

被引：0
|
作者：
Luo Y. [1 ]
Chen M.-L. [2 ]
Xu N. [1 ]
Gao H. [1 ]
Ye J.-M. [2 ]
Han Z.-C. [2 ]
机构：
[1] Beijing Institute of Mechanical Equipment, Beijing
[2] Science and Technology on Combustion, Internal Flow and Thermo-Structure Laboratory, Northwestern Polytechnical University, Xi’an
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2023年 / 44卷 / 06期
关键词：
Divergence half-angle; Field emission electric propulsion; Particle-In-Cell; Plume; Structural parameters;
D O I：
10.13675/j.cnki.tjjs.2209029
中图分类号：
学科分类号：
摘要：
The Field-Emission-Electric-Propulsion （FEEP） thrusters is a typical of miniature electric propulsion devices. In order to deeply understand the influence mechanism of structural parameters on thruster performance，the Particle-In-Cell particle simulation method was used to perform the plume simulation of the nanoscale structure of the Taylor cone jet structure to the macroscopic millimeter scale structure. The difference of plume shape caused by the change of structural parameters and its influence on the thruster performance were analyzed. The results show that the emitter height is the key parameter to determine whether the thruster beam will bifurcate. When the emitter height is lower than 300µm，it is easy to lead to beam bifurcation and seriously affect the performance and life of the thruster. The accelerating grid slot width is the key parameter to determine plume divergence angle，thrust and specific impulse，and its influence amplitude can reach 30%~50%. Plume divergence angle increases with the increase of the accelerating grid slot width，while thrust and specific impulse decreases. The distance between emitter and accelerating grid has relatively little influence on the performance of FEEP thruster，which can support the stable and efficient operation of FEEP thruster in a large range. According to the variation law of FEEP thruster performance with structural parameters，the recommended value range of structural parameters is emitter height 500~1000µm，accelerating grid slot width 2000µm，emitter - accelerating grid spacing 360~1300µm. © 2023 Journal of Propulsion Technology. All rights reserved.
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