Investigation of High-Voltage Pulse Discharge Breakdown Characteristics in Water Under Hydrostatic Pressure Breakdown Delay and Equivalent Resistance

Abstract

This study examines the traits of high-voltage pulse discharge breakdown in water under hydro static pressure, specifically focusing on the delay in breakdown and the corresponding equivalent resistance. The occurrence of a significant delay when high-voltage pulse discharges occur in water under hydro static pressure is leveraged to assess the stability of the discharge. These delays and their characterization provide crucial information for the engineering field, particularly in monitoring discharge impact. This research delivers valuable theoretical insights for dissecting and understanding this phenomenon. According to our findings, a higher voltage leads to a shorter breakdown delay, and an elevated voltage beyond a certain point decreases the equivalent resistance. Despite this, few studies have addressed the factors influencing these reactions. Thus, this work introduces a high-voltage pulse discharge equivalent circuit founded on the gasification-ionization of plasma channels to systematically explore these properties. We found that increasing the voltage enhances the ionization level in plasma channels, which speeds up the ionization current, accordingly reducing the breakdown delay. On the contrary, heightening the hydrostatic pressure lengthens the breakdown delays and enriches the equivalent value of the resistance.