霍尔效应推力器放电双稳态机理研究  

Study on the mechanism of Hall effect thruster discharge with bistable state

作　　者：韩轲[1,2] 江滨浩[2] 纪延超[2] 

机构地区：[1]哈尔滨商业大学计算机与信息工程学院,哈尔滨150028 [2]哈尔滨工业大学电气工程及自动化学院,哈尔滨150001

出　　处：《物理学报》2012年第7期326-331,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60871035);黑龙江省教育厅科学技术研究项目(批准号:12511138)资助的课题~~

摘　　要：实验发现霍尔效应推力器在自励磁模式下具有两个稳定的放电工作点,且运行过程中在这两个工作点上往复跳变,很大程度上影响了推力器通道内等离子体的放电物理过程及其综合性能.本文结合推力器放电磁安特性曲线与励磁电流曲线的相互关系,给出了推力器放电双稳态特性形成的物理机理.在此基础上提出了通过改变励磁电流曲线斜率,使推力器稳定工作于单放电工作点的方法,结合—维动态流体模型给予了物理解释,并通过实验加以验证.Experimental results indicate that there exist two stable discharge operation points in a self-excited mode Hall effect thruster. During the operation,the discharge operation point jumps to and fro between two values,which greatly influences the physical process of plasma discharge in the thruster channel and the comprehensive performance of thrusters.In this paper,by using the relationship between discharge magneto-ampere characteristic curve and magnetic field coil current curve,we propose the physical mechanism of forming the discharge bistable characteristic.On the basis of the mechanism,a method of stabilizing the single discharge operation point is presented through changing the slope of magnetic field coil current curve.The physical explanation is given through established one-dimensional dynamic fluid model for self-excited mode,and the results are approved by the self-excited experiment.

关 键 词：霍尔效应推力器 自励磁模式 双稳态 一维流体模型 

分 类 号：O53[理学—等离子体物理]