Analysis of cavities characteristics of underwater pulsed current discharge

Liu, Yi; Zhao, Yong; Yijia, Ren; Liu, Siwei; Lin, Fuchang

doi:10.1088/1361-6595/abf857

Cited by 10 publications

(2 citation statements)

References 30 publications

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“…Where u r (t) represents the resistive component and u l (t) represents the inductive component. And the method of calculating the two components of the voltage can be referred to the previous work and will not be repeated here [23]. The deposition energy E pl (t) can be expressed as shown in the following equation [22] ò ò…”

Section: Time-domain Model Of the Shock Wave Loadmentioning

confidence: 99%

Analysis of spatial damage characteristics of rock under multiple high-voltage pulse discharges: I. Cross-section characteristics

Zhao,

Zhang,

Liu

et al. 2023

Phys. Scr.

Self Cite

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Rock breaking by high-voltage pulse discharge (rock breaking by high-voltage pulse discharge, RHPD) is an efficient technology for rock breaking. A single discharge will lead to the initiation or expansion of cracks inside the rock, and the expansion of cracks after multiple discharges will lead to the destabilization of the rock and finally produce a fractured zone. Because of the difficulty in quantifying the spatial damage characteristics of the fractured zone, in this paper, based on the discrete element method and theoretical analysis, the spatial damage model (spatial damage model, SDM) of rock is established. For a typical liquid-solid combination, from the microscopic point of view, the damage characteristics of the fractured zone on the radial cross-section of the plasma are quantified. The changing characteristics of the damage characteristics were analyzed for multiple discharges. In addition, an experimental platform has been built, and the accuracy of the SDM has been verified by the experimental results. The results show that the increase in the discharge distance will improve the deposition energy and crushing effect, and will also improve the accuracy of the model. The findings of this paper provide a technical reserve for the application of RHPD.

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Section: Time-domain Model Of the Shock Wave Loadmentioning

confidence: 99%

Analysis of spatial damage characteristics of rock under multiple high-voltage pulse discharges: I. Cross-section characteristics

Zhao,

Zhang,

Liu

et al. 2023

Phys. Scr.

Self Cite

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show abstract

“…The simulation results show that this method is superior to the Kalman Filter in estimation accuracy and tracking speed [21]. Xiao X G et al presented a new joint denoising algorithm for quality disturbance based on the Strong Tracking Kalman filter, which effectively suppresses the noise of various disturbance signals, and the effect is better than the wavelet threshold denoising algorithm [22]. Therefore, it is feasible and meaningful to introduce the strong tracking filter into the identification study for parameters and the discharge stage of pulse discharge in water.…”

Section: Introductionmentioning

confidence: 99%

Novel method for identifying the stages of discharge underwater based on impedance change characteristic

GAO 高,

KANG 康,

GONG 龚

et al. 2024

Plasma Sci. Technol.

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It is difficult to determine the discharge stages in a fixed time of repetitive discharge underwater due to the arc formation process being susceptible to external environmental influences. This paper proposes a novel underwater discharge stage identification method based on the Strong Tracking Filter (STF) and impedance change characteristics. The time-varying equivalent circuit model of the discharge underwater is established based on the plasma theory analysis of the impedance change characteristics and mechanism of the discharge process. The STF is used to reduce the randomness of the impedance of repeated discharges underwater, and then the universal identification resistance data is obtained. Based on the resistance variation characteristics of the discriminating resistance of the pre-breakdown, main, and oscillatory discharge stages, the threshold values for determining the discharge stage are obtained. These include the threshold values for the resistance variation rate (K) and the moment (t). Experimental and error analysis results demonstrate the efficacy of this innovative method in discharge stage determination, with a maximum mean square deviation of Scr less than 1.761.

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Analysis of the bubble-pulsation process of underwater high current pulsed discharge

Zhao

Liu

Zhang

et al. 2022

Journal of Applied Physics

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The bubble of underwater high current pulsed discharge forms after the pre-breakdown process, and the change in electrical loop parameters will affect its pulsation characteristics. The relationship between loop electrical parameters and the bubble-pulsation process is unclear, and its influence on the acoustic characteristics of the bubble-pulsation is not apparent. In order to quantitatively analyze the bubble-pulsation characteristics, a comprehensive experimental platform of underwater high current pulsed discharge is built. Under different loop electrical parameters, with the help of experimental data of electrical signals and optical images, the variation characteristics of the bubble-pulsation period and energy are analyzed. The acoustic characteristics of the bubble-pulsation process are analyzed, and the correctness of acoustic characteristic analysis is verified by experimental results. The comparison between experimental and theoretical data shows that the analysis of bubble-pulsation period and energy is correct. The bubble-pulsation characteristics can be predicted utilizing the deposition energy of the plasma channel. The results provide a basis for the quantitative analysis of the bubble-pulsation characteristics and strengthen the connection between the three underwater high current pulsed discharge processes.

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Analysis of cavities characteristics of underwater pulsed current discharge

Cited by 10 publications

References 30 publications

Analysis of spatial damage characteristics of rock under multiple high-voltage pulse discharges: I. Cross-section characteristics

Analysis of spatial damage characteristics of rock under multiple high-voltage pulse discharges: I. Cross-section characteristics

Novel method for identifying the stages of discharge underwater based on impedance change characteristic

Analysis of the bubble-pulsation process of underwater high current pulsed discharge

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