Evolution of underwater shock wave in far-field regime of electrical wire explosion system over wide range of electric pulse energy

Yuan, Wei; Han, Ruoyu; Li, Pengfei; Cao, Yuchen; Li, Chen; Zhang, Yongmin

doi:10.1016/j.expthermflusci.2023.111022

Cited by 4 publications

(1 citation statement)

References 29 publications

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“…When the electrode is passed through high voltage electricity, the metal wire is broken down by the strong current to form plasma, and the resulting shock wave damages the surrounding brittle material. This method can be called the wire explosion method, which has a higher conversion rate of electrical energy to impact energy than the electro-hydraulic effect method [24,25].…”

Section: Introductionmentioning

confidence: 99%

Research on the Crushing of Reinforced Concrete Two-Way Slabs by Pulse Power Discharge Technology

Lin,

Yang,

Liu

et al. 2024

Buildings

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The application of pulse power discharge (PPD) technology in the crushing and dismantling of concrete structures has characteristics related to both green and environmental protection, as well as safety and reliability, with broad application prospects in the construction and municipal engineering fields in dense urban areas. Nevertheless, the research into using this technology to break reinforced concrete (RC) slabs is very limited, while the influence of key parameters on the crushing effect of reinforced concrete slabs is not clear. To solve this problem, a finite element model of an RC slab was established by ABAQUS. The effect of a shock wave generated by PPD on the surrounding concrete was simulated by an explosion-load equivalent, and the development process of concrete crack was simulated by a cohesive force model. Based on the results of the model analysis, the effects of reinforcement spacing, as well as diameter and concrete strength on the crushing effect of RC slabs were investigated. The results show that the increase in reinforcement diameter and the decrease in reinforcement spacing have a significant effect on limiting the development of cracks. According to the development of cracks, they can be divided into three types: edge cracks, cracks between central holes, and cracks between edge holes. The influence of reinforcement spacing and diameter on the first two crack widths is the most obvious. The increase in concrete strength also reduces the width of cracks. Based on the analysis results, the calculation expressions of the crushing effect of the PPD technique on RC slabs were established, which provides theoretical support for the popularization and application of this technique.

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Section: Introductionmentioning

confidence: 99%

Research on the Crushing of Reinforced Concrete Two-Way Slabs by Pulse Power Discharge Technology

Lin,

Yang,

Liu

et al. 2024

Buildings

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Experimental investigation of the pulse duration on the efficiency and electrode wear of electrohydraulic forming process

Ledoux

2023

Manufacturing Rev.

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Electrohydraulic Forming (EHF) is a high velocity sheet metal forming technique using high-energy electrical discharges in a water chamber to shape complex parts. Despite its potential benefits, the EHF process is not well understood, and further research is needed to comprehend the underlying physical mechanisms and optimize the process parameters. One of the critical factors is the control of energy discharge within the forming chamber in terms of arc duration. The proposed study aimed to analyze its impact on the characteristics of electrohydraulic forming focusing on the efficiency of the operation and electrode wear. As a result, the height of the formed parts was compared and used to evaluate the efficiency of the operation. The electrode wear was estimated by a phenomenological model. By comprehending the relationships between these factors and operational efficiency, a tradeoff was established to enhance the EHF process, taking into account electrode wear, thereby expanding its industrial applications.

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Breakdown dynamics and instability of underwater metallic aerosol bubble atomized by electrical explosion

Han,

Yuan,

Cao

et al. 2024

Physics of Fluids

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This study delves into the electrophysical processes and intricate fluid dynamics of an electrical-explosion-induced bubble in water. A fine copper wire is heated up and exploded to dense metallic aerosol (vapor–drop mixture) via a μs-timescale 10 kA current pulse, crossing a wide range of the density–temperature parametric space. High-speed photography along with discharge diagnostics reveals two modes for plasma development (restrike) inside explosion products: gas discharge and volume ionization. Experimental results indicate the metal–insulator transition of metal can easily throttle down circuit current at a moderate degree of vaporization, resulting in a free-expanding metallic aerosol in the presence of a quasi-direct current axial electric field of kV/cm level. After dozens of μs, an anode-directed, “ionization wave” is observed inside the aerosol bubble, propagating with a speed of 3–10 km/s. Remarkably, adjustments in the electric field permit the observation of cathode-directed discharge development. Increasing the charging voltage or wire diameter promotes the overheating degree, accompanied by partial ionized striation of electro-thermal instability. With sufficient high overheating of the wire (ξ > 1), the gas discharge disappears and restrike is dominated by volume ionization.

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Evolution of underwater shock wave in far-field regime of electrical wire explosion system over wide range of electric pulse energy

Cited by 4 publications

References 29 publications

Research on the Crushing of Reinforced Concrete Two-Way Slabs by Pulse Power Discharge Technology

Research on the Crushing of Reinforced Concrete Two-Way Slabs by Pulse Power Discharge Technology

Experimental investigation of the pulse duration on the efficiency and electrode wear of electrohydraulic forming process

Breakdown dynamics and instability of underwater metallic aerosol bubble atomized by electrical explosion

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