Pulsed electrical breakdown of conductive water with bubbles
This paper presents the results of an experimental study of the effect of vapor-gas bubbles distributed in the fluid volume and on the surface of the electrodes on the development of a pulsed electrical discharge in water with a conductivity of 35 and 330 μS/cm in a 1 cm gap. A comparative analysis of the results obtained for discharge in water without bubbles, with bubbles only in the bulk of the liquid, with bubbles only on the surface of the electrodes, with bubbles in the volume and on the surface of the electrodes, is carried out. It was found that at a voltage close to the breakdown in water without bubbles, both types of bubbles (volume and on the surface) lead to a change in the mechanism of discharge development: initially, the thermal mechanism from the anode turns into a streamer-leader from the anode in water with volume bubbles, and in the presence of surface bubbles develops from the cathode. The speed of propagation of channels at the same time increases by three and one order, respectively.