Current shunting and formation of stationary shock waves during electric explosions of metal wires in air

Ivanenkov, G. V.; Gus'kov, Sergei Yu; Barishpol’tsev, D. V.

doi:10.1134/s1063780x10010058

Cited by 4 publications

(2 citation statements)

References 10 publications

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“…The compression and heating of the vapor create a medium ready for breakdown behind the shock front, as a result of which a shunting channel forms in the corona. This process is similar to that discussed in [40] in connection with experiments on the explosion of wires in the air environment.…”

Section: Scenario Of a Nanosecond Eewsupporting

confidence: 78%

Electric explosion of fine wires: Three groups of materials

et al. 2015

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Experimental data demonstrating differences in the structures of channels formed during nanosecond discharges through fine wires made of different materials are presented. In addition to the traditional two classes of metals and alloys (the copper and tungsten groups), a new class is proposed to which materials of the nickel type belong. Their properties combine the characteristic properties of the two traditional groups, due to which they occupy an intermediate position between the latter. This manifests itself in the unstable character of explosion, the type of which can change drastically when changing the ambient medium or other conditions. Most of the reported results were obtained at a small setup with maximum values of the current and voltage of 10 kA and 20 kV, respectively, the current rise time being about 300 ns. An attempt is made to construct a scenario of the development of a nanosecond explosion that would make it possible to qualitatively describe the formation of the discharge channel structure. The analysis is based on the recent experimental results indicating that the cores formed in the course of the discharge have a tubular structure.

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Section: Scenario Of a Nanosecond Eewsupporting

confidence: 78%

Electric explosion of fine wires: Three groups of materials

et al. 2015

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“…EWE has been operated in various mediums (e.g. vacuum, air [15][16][17][18][19][20][21], water, glycerol [22][23][24], and other organic compounds [25,26]) and over a wide parameter range, with current amplitudes ranging from kA to MA and time scales from tens of ns to ms. The state of the exploding product (EP) largely depends on the Joule energy deposition (E dep ) into the wire, which is often compared to the energy of vaporization (E vap ) of the wire [27].…”

Section: Introductionmentioning

confidence: 99%

Electrical wire explosion as a source of underwater shock waves

Shi¹,

Yin²,

Li³

et al. 2021

J. Phys. D: Appl. Phys.

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The underwater electrical wire explosion (UEWE) is an appealing source of underwater shock waves (SWs) with a high conversion efficiency from electrical energy to mechanical energy, good repeatability and controllability. Industrial applications are already seen in oil-well unblocking and stratum stimulation, and research is currently underway to apply UEWEs in electro-hydraulic forming, exploitation of unconventional gas and oil resources, etc. The emerging new applications call for a review on UEWE research from the perspective of an efficient SW source. This review paper considers the physical processes and numerical simulation methods, electrical and SW characteristics, and current and potential applications, and provides suggestions for future research directions. The code (XJ_UEWE01) developed by the authors to solve a coupling model of UEWE is included. The paper will provide students and researchers new to this field with an explanation of basic concepts of UEWE and a detailed overview of previous studies, and will aid research on UEWE applications, especially device development and parameter optimization.

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Core structure and secondary breakdown of an exploding wire in the current-pause regime

Romanova

Mingaleev

Ter-Oganesyan

et al. 2019

Matter and Radiation at Extremes

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The results of experiments with rapidly exploding thin conductors in the current-pause regime are presented. Copper wires 25 μm in diameter and 12 mm in length serve as loads for a GVP pulsed generator based on a low-inductance capacitor. The generator produces current pulses of up to 10 kA with dI/dt up to 50 A/ns. A 100–800-ns current-pause regime is obtained for charging voltages of 10–15 kV. The discharge channel structure is studied by shadow photography using 0.53-μm, 10-ns second-harmonic pulses from a Nd3+:YAG laser. In the experiments, three types of secondary breakdown are observed, with different symmetry types, different current-pause durations, and different dependences on the energy deposited into the wire during its resistive heating. All of these breakdown types develop inside a tubular core that is produced in the current-pause stage and that remains almost undamaged by the breakdown.

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Current shunting and formation of stationary shock waves during electric explosions of metal wires in air

Cited by 4 publications

References 10 publications

Electric explosion of fine wires: Three groups of materials

Electric explosion of fine wires: Three groups of materials

Electrical wire explosion as a source of underwater shock waves

Core structure and secondary breakdown of an exploding wire in the current-pause regime

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