摘要
为消除场致发射电推力器(Field emission electric propulsion,FEEP)羽流发散角度过大给推进器寿命和可靠性带来的不利影响,研究了聚焦电极阵列空间位置对羽流聚焦效果的影响,并通过正交试验法给出了最优电极分布。通过数值仿真对FEEP的离子运动过程建模,采用正交试验方法电极阵列进行研究,关注其在不同空间位置下的聚焦效果,得到了离子出射半角分布和推力大小。结果表明,聚焦极的位置决定了羽流的聚焦效果,其次是提取极和加速极;聚焦极径向距离发射极1600μm,且提取极径向和轴向坐标为(800μm,500μm)时能得到最优的聚焦效果。本文验证了正交试验方法在聚焦电极阵列设计上的可行性,同时还为聚焦电极阵列设计提供了有效的分析方法和设计策略。
During the operation of the field emission electric propulsion(FEEP),it would produce lots of divergent ions which can reduce its life and reliability.The poly-electrode array position was studied which can focus the ion beam to eliminate the negative impact,and a design strategy of the electrode arrangement was given in this paper.Therefore,the ions motion process from emission to ejection is simulated in different electrode ar⁃rays that were obtained by orthogonal experiment method.The relationship between the electrodes position,diver⁃gence half-angle and thrust force was analyzed,which indicate that the position of the focus electrode determines the focusing effect of the ion beam,and the extract electrode can be a secondary factor influencing thrust force.The focusing effect is best when the electrode radial position is 1600μm and when the vertex radial and axis posi⁃tions of the extract electrode is 800μm and 500μm.Finally,the result verifies the feasibility of orthogonal experi⁃ment in the design of focus electrode array,provides an effective analysis method and a design strategy for the de⁃sign of focus electrode array.
作者
李俊林
周逸浩
杨铖
沈岩
LI Jun-lin;ZHOU Yi-hao;YANG Cheng;SHEN Yan(School of Aeronautics and Astronautics,Sun Yat-Sen University,Shenzhen 518107,China;Shenzhen Key Laboratory of Intelligent Microsatellite Constellation,Shenzhen 518107,China)
出处
《推进技术》
EI
CAS
CSCD
北大核心
2023年第12期217-224,共8页
Journal of Propulsion Technology
基金
国家自然科学基金(52131307)
国家重点研发计划(2020YFC2201001)
深圳市科技计划(ZDSYS20210623091808026)。
关键词
场致发射电推力器
聚焦离子束
正交试验
聚焦电极阵列
优化设计
羽流发散角
Field emission electric propulsion
Focus ion beam
Orthogonal experiment
Focus elec⁃trode array
Optimum design
Plume divergence angle
作者简介
李俊林,硕士生,研究领域为场发射电推进技术;通讯作者:沈岩,博士,教授,研究领域为空间推进、电推进、微推进及相关的等离子体和流体控制。E-mail:shenyan8@mail.sysu.edu.cn。
