Streamer dynamics and charge self‐erasing of two counter‐propagating plasmas in repetitively pulsed surface dielectric barrier discharge
Streamer dynamics and charge self‐erasing of two counter‐propagating plasmas in repetitively pulsed surface dielectric barrier discharge
复制标题
重复脉冲表面介质阻挡放电中两个反向传播等离子体的流光动力学和电荷自擦除
DOI：
10.1049/hve2.12188
复制
发表时间：
2021
期刊：
影响因子：
4.4
通讯作者：
Yan Wu
中科院分区：
文献类型：
--
作者：
Bangfa Peng;Nan Jiang;Kefeng Shang;Na Lu;Jie Li;Yan Wu
利用电学、光学诊断和二维流体模型研究了重复脉冲表面介质阻挡放电产生的两个反向传播等离子体的流光动力学和电荷自擦除。通过时间分辨等离子体图像，在单脉冲放电中确定了主流、过渡流和次流三个不同的放电阶段。此外，在放电间隙的中间位置观察到两个相对的主流线的合并现象。与第一个脉冲相比，由于前一次放电留下的残余表面电荷的限制，在随后的放电过程中测量到初级流的低流传播速度。在放电间隙为9 mm的连续脉冲中，转移电荷和沉积能量没有显著差异。数值模拟结果表明，两根主拖缆的等离子体强度降低是由于介质表面的电荷积累和拖缆头部的正电荷聚集造成的。数值和实验研究表明，二次流光可以通过漂移的电子擦除残余电荷，即在单个脉冲中实现电荷自擦除现象。
The streamer dynamics and charge self‐erasing of two counter‐propagating plasmas generated by repetitively pulsed surface dielectric barrier discharge are investigated using electrical and optical diagnosis, and a two‐dimensional fluid model. Three distinct discharge phases of primary, transitional and secondary streamers are identified in a single‐pulse discharge through the time‐resolved plasma images. Moreover, a merging phenomenon of the two opposing primary streamers is observed at the middle position of the discharge gap. Compared to the first pulse, a low streamer propagation velocity of the primary streamer is measured during the subsequent discharge process due to the limitation of residual surface charges left by the previous discharge. No significant differences of the transferred charge and the deposited energy are obtained in the sequential pulses at a discharge gap of 9 mm. Numerical simulations show that a reduction for the plasma intensity of the approached two primary streamers is attributed by the accumulated charge on the dielectric surface and gathered positive charges in the streamer head. Numerical and experimental studies indicate that the residual charges can be erased by the secondary streamer through the drifted electrons, namely that a phenomenon of charge self‐erasing can be realized in the individual pulse.