脉冲波形对氦等离子体射流子弹传播特性的影响  

The Effect of Pulse Parameters on Helium Plasma Bullet Distribution Properties

作　　者：赵勇 王瑞雪[2] 章程[2,3] 郑书河[1] 邵涛 Zhao Yong;Wang Ruixue;Zhang Cheng;Zheng Shuhe;Shao Tao(College of Mechanical and Electronic Engineering Fujian Agriculture and Forestry University Fujian 350002 China;Key Laboratory of Power Electronics and Electric Drive Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China;University of Chinese Academy of Sciences Beijing 100049 China)

机构地区：[1]福建农林大学机电工程学院,福州350002 [2]中国科学院电力电子与电气驱动重点实验室中国科学院电工研究所,北京100190 [3]中国科学院大学,北京100049

出　　处：《电工技术学报》2019年第16期3472-3479,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金项目(51637010、51507169);清华大学电力系统及发电设备控制和仿真国家重点实验室开放课题(SKLD16KZ05)资助

摘　　要：本文研究脉冲波形对大气压等离子体射流子弹传播特性影响,并进一步阐述电场强度与等离子体射流时空演变特性之间的关系。实验表明:不同脉冲波形对等离子体射流子弹传播特性产生影响,但影响机制不同。较短纳秒脉冲上升沿产生过电压击穿,子弹半径较大且传播速度快。脉冲宽度和下降沿通过残余电荷形成反向电场以影响射流整体电场强度。当脉冲宽度小于10μs时,射流长度随脉冲宽度增加而减小;当脉冲宽度大于10μs时,残余电荷累积饱和,脉冲宽度不再对射流特性发生影响。当下降沿增加时,上升沿子弹消散速度较慢,且有一个明显的拖尾,脉冲下降沿可能通过残余电荷形成的反向电场影响子弹头部的空间电场方向和强度,进而影响脉冲等离子体子弹传播。最后使用谱线比方法计算等离子体射流宏观电场强度,其变化趋势与等离子体羽流长度和子弹分布相一致。In this paper,the influence of pulse waveform on the propagation characteristics of atmospheric pressure plasma jet bullets was studied.Furthermore,the dependence of spatial-temporal distribution of plasma bullet on the electric field was investigated.The experimental results showed that the applied parameters affected plasma bullet behavior in different ways.The pulse with short rise time broke down at over high voltage,which produced a high electric field.In turn,the radius of plasma bullet was larger and the velocities were higher.The pulse width and the pulse fall time affected the overall electric field by forming an opposite electric field caused by residual charges.The plasma jet length decreased when pulse width was smaller than 10μs.However,when plasma jet length was larger than 10μs,the residual charges were saturated and plasma jet length kept constant.When the pulse fall time increased,the plasma bullet dissipated in a smaller rate and showed an obvious“tail”.The different pulse fall time might affect the electric field distribution by an opposite electric field formed by residual charges.Finally,the distribution of electric field calculated by spectral emission ratio method was consistent with the length of the plasma plume and the behavior of plasma bullet.

关 键 词：等离子体射流 电场强度 子弹传播速度 纳秒脉冲 

分 类 号：TM85[电气工程—高电压与绝缘技术]