Abstract
The control of discharge mode and the optimization of energy efficiency are of particular concern as the significant impact on the application of the underwater plasma discharge system. In this paper, the RLC parameters of each part of the underwater discharge system are investigated, and the equivalent circuit is obtained. Typical waveforms of current and voltage for different underwater discharge modes are displayed. The correlation between the equivalent RLC parameters of the discharge system and the discharge modes and energy is illustrated. The equivalent circuit of the underwater plasma discharge system is utilized to analyze the effects of the power source, electrode, and liquid dielectric parameters. The influences of these parameters can be identical to the impacts on the RLC parameters of the underwater discharge system equivalent circuit simultaneously, and then, the effects on the discharge modes and energy can be better understood. It can be concluded that the relative relationship of system equivalent RLC parameters determines the discharge mode, and the impedance matching between the discharge channel and the external circuit determines the discharge energy.
Highlights
The underwater plasma discharge system (UPDS) based on the hydroelectric effect1 is widely utilized in many areas.2 The typical modes of underwater plasma discharge are spark discharge and corona discharge.3,4 The main difference between them is whether there is a through plasma channel between the electrodes
It can be concluded that the relative relationship of system equivalent RLC parameters determines the discharge mode, and the impedance matching between the discharge channel and the external circuit determines the discharge energy
It can be concluded that the maximum spark discharge gap distances decrease with the increase in conductivity; the equivalent mean resistances increase with the gap distance
Summary
The underwater plasma discharge system (UPDS) based on the hydroelectric effect is widely utilized in many areas. The typical modes of underwater plasma discharge are spark discharge and corona discharge. The main difference between them is whether there is a through plasma channel between the electrodes. The typical modes of underwater plasma discharge are spark discharge and corona discharge.. The generation conditions, energy efficiency, and products (e.g., acoustic signals or electromagnetic radiation) of the two discharge modes are different.. In engineering applications, to obtain specific products, it is necessary to adjust the parameters of the underwater plasma discharge system according to the actual situation to achieve the ideal discharge mode and energy efficiency.. There have been many studies on discharge mode and energy efficiency.. Lee et al. studied the case where the connecting cable between the pulsed power supply and the discharge gap was hundreds of meters long and found that a lower charging voltage, higher ambient water pressure, and longer cable length produced a lower initial spark channel density, which resulted in lower peak pressure
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