摘要
为得到电极结构(电极长度和电极张角)对滑动弧放电等离子体尺寸大小的影响规律,设计并制作了一套易于更换电极、调整电极间距的滑动弧等离子体发生装置。利用示波器对滑动弧放电等离子体的电信号进行测量,结合高速摄影仪和DV相机对滑动弧放电图像进行了记录与分析。试验结果表明:随着气体流量的增加,滑动弧放电呈现3种状态;稳定的滑动弧放电等离子体的电压波形是一种周期性的电压峰值逐渐增大的波形,它反映了电弧的产生、移动和熄灭。利用流量计控制气体体积流量为10 L/min,在张角为30°的情况下,等离子体长度随电极长度的增加而逐渐减小,并且在电极长度达到50 mm时,等离子体已无法超出电极末端。等离子体宽度是在电极长度为20 mm时达到最大。保持电极长度为20 mm,改变电极张角,发现张角越大,电弧沿电极的滑动距离越小,电极引导电弧滑动的作用无法得到充分发挥,导致滑动弧放电等离子体的尺寸减小。
In order to obtain the influence of electrode structure (electrode length and electrode angle) on the size of the discharge plasma of the gliding arc, a gliding arc discharge (GAD) device which is easy to replace electrodes is designed. An oscilloscope was adopted to measure the electrical signal of the gliding arc discharge plasma, and the images of glid- ing arc discharge with the electrodes of different structures are taken by a high-speed cemera and DV cemera. The results show that, with the increase of flow rate, gliding arc discharge has three different states. The voltage waveform of the steady GAD plasma is a waveform whose peak value is gradually increasing, which is distinct from the voltage waveform of the traditional AC arc. When the power and the flow rate are constant, the length of plasma will decrease with the in- crease of the length of the electrodes. And the plasma cannot exceed the end of electrodes when the length of the electrodes reaches 50 mm. The width of plasma width reaches the maximum when the electrode length is 20 mm. When the length of the electrode is 20 mm, the gliding distance of the arc along the electrodes will decrease with the increase of opening angel of electrodes, which results in the reduction of the size of the GAD plasma.
作者
张若兵
罗刚
黄昊晨
李爽
付永强
姜雨泽
ZHANG Ruobing;LUO Gang;HUANG Haochen;LI Shuang;FU Yongqiang;JIANG Yuze(Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China;Electric Power Research Institute, State Grid Shandong Power Supply Company, Jinan 250002, China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2019年第10期3357-3364,共8页
High Voltage Engineering
基金
国家自然科学基金(51677105)
深圳市的科技攻关项目(JSGG20170412151407005)~~
