Abstract—

The effect of electrode polarity in the pin-to-rod geometry on the development of pulsed electric discharge in water with specific electrical conductivity of (90 ± 10) µS/cm with and without air microbubbles was experimentally studied. It was found that the initiation of the plasma channel at the anode in water occurs near the metal–liquid–insulation contact in both anode geometries under study. In the presence of microbubbles at an increased voltage, the development of plasma channels after initiation occurs in the direction opposite to the discharge gap along the insulated surface of the electrodes. In the presence of microbubbles, the breakdown voltage decreases, and the delay to discharge initiation and the total time of breakdown development by the channel propagating from the pin anode also decrease. When the voltage is increased, the development of the closing channel occurs from the cathode, regardless of its geometry.

中文翻译：

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电极极性对含空气微泡的导电水分解发展的影响

摘要-

通过实验研究了针到杆几何结构中电极极性对比电导率为 (90 ± 10) µS/cm 的水中脉冲放电发展的影响，其中有和没有空气微泡。发现在水中的阳极处的等离子体通道的起始发生在所研究的两种阳极几何结构中的金属-液体-绝缘接触附近。在增加电压下存在微泡的情况下，引发后等离子体通道的发展发生在沿电极绝缘表面与放电间隙相反的方向上。在微气泡存在的情况下，击穿电压降低，放电开始的延迟和从针阳极传播的通道导致击穿的总时间也减少。当电压升高时，