Study on the electrowetting and beam current characteristics of externally wetted ionic liquid electrospray thruster

doi:10.1063/5.0069731

	Study on the electrowetting and beam current characteristics of externally wetted ionic liquid electrospray thruster
	Xue SW(薛森文); Duan L(段俐); Kang Q(康琦)2
刊名	AIP ADVANCES
	2021-12-01
卷号	11 期号:12 页码:15
DOI	10.1063/5.0069731
通讯作者	Kang, Qi(kq@imech.ac.cn)
英文摘要	It is the theoretical basis to analyze the hydrodynamics mechanism of ionic liquid in an electrostatic field to ensure that the ionic liquid electrospray thruster possesses good wettability. Stable and continuous electrowetting emitters are closely related to thrust noise, resolution, and stability. Therefore, it is urgent to explore the law of ionic liquid electrowetting emitters in an electrostatic field to improve the performance of thrusters. The article proposes a new hybrid emitter structure, which consists of a V-blade emitter and a square capillary. It also carries out numerical simulation of emitter electrowetting under normal gravity and atmospheric conditions and emission experiments to explore the process of ionic liquid layer spreading on the external surface of the emitter. The dimensions of the emitter d(1), d(2), and theta and the physical properties of ionic liquids jointly determine the electrowetting velocity, the threshold of wetting voltage, and the liquid layer thickness. By analyzing the influence of various variables on electrowetting, a complete emitter electrowetting law of ionic liquid electrospray thrusters is summarized, which provides an important basis for the optimization of the emitter structure. Considering the scale of the emitter and bond approximate to 1, the meniscus in the electrostatic field is mainly affected by gravity, surface tension, viscous force, and electrophoretic force. Accordingly, it is worth noting that electrophoretic force is calculated by the Maxwell stress tensor method that treats ionic liquids as a dielectric to ensure the continuity of the meniscus. Although it can satisfy the electrowetting study at the macroscale, the interaction between anions and cations at the micro-scale is ignored. The numerical simulation results and the experimental results are correlated. It is proved that the method used in this article is accurate enough to simulate electrowetting before the liquid layer breaks up to form ion emission.
分类号	Q4
资助项目	Strategic Priority Research Program of the Chinese Academy of Science[XDA1502110105] ; National Natural Science Foundation of China[12032020] ; National Natural Science Foundation of China[12072354]
WOS关键词	EMITTER
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
WOS记录号	WOS:000738915800005
资助机构	Strategic Priority Research Program of the Chinese Academy of Science ; National Natural Science Foundation of China
其他责任者	Kang, Qi
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/88284]
专题	力学研究所_国家微重力实验室
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China;
推荐引用方式 GB/T 7714	Xue SW,Duan L,Kang Q. Study on the electrowetting and beam current characteristics of externally wetted ionic liquid electrospray thruster[J]. AIP ADVANCES,2021,11(12):15.
APA	薛森文,段俐,&康琦.(2021).Study on the electrowetting and beam current characteristics of externally wetted ionic liquid electrospray thruster.AIP ADVANCES,11(12),15.
MLA	薛森文,et al."Study on the electrowetting and beam current characteristics of externally wetted ionic liquid electrospray thruster".AIP ADVANCES 11.12(2021):15.