A Method for Measuring the Propagation Speed of Streamer Discharge in Water Using its Shockwave Pattern

A Method for Measuring the Propagation Speed of Streamer Discharge in Water Using its Shockwave Pattern
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利用冲击波模式测量水中流光放电传播速度的方法

DOI:
10.1109/tps.2020.2989217
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发表时间:
2020-06
影响因子:
1.5
通讯作者:
Xue Xiao Dong
Xue Xiao Dong
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Wen Xiao Qiong;Xue Xiao Dong

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当流光放电在水中发展时,它从流光灯丝的头部释放球形冲击波,在灯丝周围留下离散冲击波链。每个冲击波中心的位置是灯丝头在某一时刻位置的良好指示器。从灯丝头释放的冲击波的速度衰减到声速(1450米/秒)在水中传播后~0.5毫米。基于这些特点的冲击波,我们开发了一种方法,用于测量在水中的流光放电的传播速度,使调查在一个单一的放电脉冲中产生的许多灯丝的传播行为的差异。基于这种方法,我们研究了在水的电导率为20 μ S $ /cm和26 kV的单次放电脉冲中产生的许多细丝的传播行为的差异。我们发现,在相同的放电脉冲中产生的细丝具有显著不同的传播速度,并确认细丝的传播速度在长时间暂停后会显著减慢。
As a streamer discharge develops in the water, it releases spherical shockwaves from the head of a streamer filament, leaving a chain of discrete shockwaves around the filament. The position of the center of each shock wave is a good indicator of the position of the filament head at a certain moment. The velocity of shockwaves released from the filament head decays to the acoustic velocity (1450 m/s) in water after spreading for ~0.5 mm. Based on these characteristics of shockwaves, we developed a method for measuring the propagation speed of a streamer discharges in water, enabling to investigate the difference in propagation behavior of many filaments generated in a single discharge pulse. Based on this method, we investigated the difference in propagation behavior of many filaments generated in a single discharge pulse at water conductivity of $20~\mu \text{S}$ /cm and 26 kV. We found that the filaments generated in the same discharge pulse have significantly different propagation speeds, and confirmed that the propagation speed of a filament will significantly slow down after a longtime pause.
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