基于不同脉冲电源的超声速气流电离实验研究  

Experimental Investigation on Discharge Characteristics Based on Different Pulsed Power in Supersonic Air Flow

作　　者：李益文[1,2] 庄重[1] 张百灵[1] 丁志文 段朋振 吴俊锋[1] LI Yiwen;ZHUANG Zhong;ZHANG Bailingl;DING Zhiwen;DUAN Pengzhen;WU Junfeng(Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi＇an 710038, China;Key Laboratory of Science and Technology on Combustion, Thermal-structure and Internal Flow, Northwestern Polytechnical University, Xi＇an 710072, China)

机构地区：[1]空军工程大学等离子体动力学重点实验室,西安710038 [2]西北工业大学燃烧、热结构与内流场重点实验室,西安710072

出　　处：《高电压技术》2018年第6期1954-1960,共7页High Voltage Engineering

基　　金：国家自然科学基金(51776222;11372352);中国博士后科学基金(2017T100772;2016M590972);陕西省博士后科研项目(2016BSHEDZZ38);陕西省自然科学基础研究计划(2017JM1022)~~

摘　　要：为了研究不同脉冲电源对超声速气流电离的影响,探究产生均匀稳定等离子体的方法,在超声速条件下ns脉冲放电实验系统中分别采用FID ns脉冲电源和NSPS3U30F2型脉冲电源对2倍声速的气流进行了电离实验。研究表明FID ns脉冲电源放电时比较稳定,超声速条件下放电电压峰值达到12.3 kV,电流第1个脉冲峰值为15.8A,电流震荡多次后趋于稳定,单脉冲放电能量为1.317 7 mJ,能量利用率较低、均匀性较差、放电较弱,放电频率的增大可以使辉光变强,改善放电特性;NSPS3U30F2型脉冲电源放电时,放电电压峰值仅有3.2 kV,电流第1个脉冲峰值为3.9 A,最大峰值为4.58 A,单脉冲放电能量为3.184 9 mJ,放电呈现为丝状不稳定状态,且沿着气流方向滑动;由于击穿时延的不可忽略性,NSPS3U30F2型脉冲电源只能实现单针放电通道的形成;综合两种电源的优缺点,在超声速条件下实现均匀稳定放电应选用FID ns脉冲电源,研究结果对后续开展磁流体技术相关实验提供了基础。To study the effects of different pulsed power on discharge characteristics in supersonic air flow and to explore how to achieve uniform and stable plasma, based on the experimental system of nanosecond pulse discharge under supersonic conditions, the discharge experiment was carried out with NSPS3U30F2 pulsed power and FID pulsed power in Ma2 air flow. The results show that, under the action of FID pulsed power, the discharge is stable. Under supersonic condition, the peak voltage is 12.3 kV, the first peak current reaches 15.8 A and single pulse discharge energy is 1.317 7 mJ, the energy utilization is low, uniformity is poor, and glow intensity is low. With the frequency increasing, glow intensity and discharge characteristic are improved; Under the action of NSPS3U30F2 pulsed power supply, the peak voltage is 3.2 kV, the first peak current is 3.9 A, the peak currenr is 4.58 A, and single pulse discharge energy is 3.184 9 mJ. The discharge appears as a filamentous unstable discharge under supersonic conditions, but the required voltage is lower and the discharge current is also lower. As the breakdown delay cannot be ignored, NSPS3U30F2 pulse power can only realize single pin discharge. Therefore, FID pulsed power should be chosen to realize uniform and stable, and the experimental results pave the way for carrying out magnetohydrodynamic technology experiments.

关 键 词：超声速气流 均匀稳定 针-板放电 脉冲放电 等离子体 

分 类 号：O354.3[理学—流体力学]