Abstract
Powerful subsonic underwater discharges are used as a tool in various industrial applications. The aim of this article is to find the essential design parameters required for a pulsed-power system to efficiently drive such discharges. Using different capacitor banks and electrode geometries, a large number of studies were conducted in an effort to better understand the phenomenology of the discharge. Without developing a numerical model for the underwater plasma discharge, the phenomenological studies clearly demonstrated that the maximum pressure that can be generated depends on the discharge current, the distance between the electrodes, and the characteristic time of the discharge. The results of this work will allow the design of efficient pulsed-power-driven strong pressure impulse systems.
Highlights
HIGH-voltage, high power underwater electric discharges have been studied for several decades
Neglecting any physical phenomena related to fluid physics, such as the bubble dynamics, the papers related to the main parameters affecting the generation of peak pressure by a given pulsed power generator are not numerous
The electrical circuit used in [25] had a ‘bypass branch’ implemented, that could be activated at any predetermined time, to stop the main current flowing through the plasma discharge
Summary
HIGH-voltage, high power underwater electric discharges have been studied for several decades. Neglecting any physical phenomena related to fluid physics, such as the bubble dynamics, the papers related to the main parameters affecting the generation of peak pressure by a given pulsed power generator are not numerous Some works, such as those reported in [20] and [24], studied the influence of the electrical Joule energy deposited in the plasma discharge on the peak pressure using three different generators. Principal parameters to be observed in the design of an optimized source of strong pressure pulses driven by pulsed power technology
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