Addressing water vaporization in the vicinity of an exploding wire

Grinenko, A.; Gurovich, V. Tz.; Krasik, Ya. E.; Dolinsky, Yu.

doi:10.1063/1.2400509

Cited by 10 publications

(5 citation statements)

References 17 publications

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“…In earlier research, 19 it was shown that despite a very high temperature of the wire's surface reaching $1 eV, the adjacent water layer may remain in a liquid phase because of high pressure. However, due to a radiation flux emitted by the exploding wire, 16 one obtains ionization of a thin ( 1 lm) layer of water in the vicinity of the exploding wire's surface.…”

Section: Discussionmentioning

confidence: 99%

“…The radius of the Al wire is r 0 ¼ 63:5 lm ¼ 6:35 Â 10 À3 cm. The length of the Al wire is l 0 ¼ 4:5 cm, its initial volume is Q ¼ pl 0 r 2 0 % 5:6 Â 10 À4 cm À3 , the total mass is M % 1:54 mg, and the total number of Al atoms in this wire is N % 3:4 Â 10 19 . The density of Al atoms at normal conditions is qN a =M ¼ 6 Â 10 22 cm À3 ; where N a is the Avogadro number and M is the molar weight of Al.…”

Section: Discussionmentioning

confidence: 99%

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Comparison of electrical explosions of Cu and Al wires in water and glycerol

2017

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The results of experiments on single Cu and Al wire electrical explosions with a current density of $10 8 A/cm 2 in water and glycerol on ns-and ls-timescales are presented. Framing and streak images of the exploding wires and generated shock waves were used for the analysis of the possible contribution of Al and glycerol combustion to the shock wave velocity and pressure behind its front. It was shown that on nanosecond and microsecond timescales of wire explosions, one obtains Al and glycerol combustion. However, Al combustion does not contribute to the velocity of the generated shock wave because of a relatively slow rate of energy density deposition into the water flow. Nevertheless, electrical explosion of Al and Cu wires in glycerol showed a significant increase in the generated shock wave velocity and consequently in the pressure behind its front as a result of glycerol's higher density and combustion. Published by AIP Publishing.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Comparison of electrical explosions of Cu and Al wires in water and glycerol

2017

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“…The absence of the shunting channel was explained by the results of computer simulations of the heating process of water and the subsequent generation of acoustic flow by heating a wire submerged in water. According to these calculations the phase trajectory is contained in the liquid part of the phase diagram [23]. Here let us note that 1D MHD calculation, which accounts for radiation transport, showed that for a current amplitude >1 MA the UEWE is accompanied by the formation of a hot (several tens of eV) narrow (∼100 µm radial thickness) plasma channel in the surrounding water.…”

Section: Micro-and Nanosecond Time Scale Uewementioning

confidence: 97%

Underwater electrical wire explosion

Krasik

Fedotov

Sheftman

et al. 2010

Plasma Sources Sci. Technol.

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A brief review of the results obtained in recent research of underwater electrical wire explosions using microsecond and nanosecond generators is presented. It was shown that the increase in the rate of energy input into the exploding wire allows one to increase the wire temperature and amplitude of shock waves (SWs). Estimated energy deposition into Cu and Al wire material of up to 200 eV/atom was achieved. In microsecond time scale wire explosion, a good agreement was attained between the wire resistance calculated using the equation of state (EOS) and that obtained experimentally. Conversely, in nanosecond time scale wire explosion, the wire resistance of EOS was modified in order to fit experimental data. Analysis of the emitted radiation showed that black body approximation cannot be used to characterize exploding wire radiation. It was found that 24% of the deposited energy is transferred into the water flow's mechanical energy. Also, it was shown that converging SWs formed by the explosion of cylindrical wire arrays can be used to achieve a pressure up to 250 kbar at the axis of implosion. Hydrodynamic simulations showed that with the use of relatively moderate pulsed power generators with stored energy of several hundred kilojoules, a pressure of several megabar can be achieved at the axis of implosion.

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“…A one-dimension hydrodynamic computer calculation accounting the water equations of state and transport parameters (18) of the heating process of water and the subsequent generation of acoustic flow by heating a wire submerged in water was presented in detailed in Ref. (19). The calculation was performed in order to obtain a trajectory of the phase state of a thin water layer adjacent to the surface of the wire during its heating.…”

Section: Computer Modelling Of the Phase State Of Water Layer Adjacen...mentioning

confidence: 99%

Last Progress in Underwater Electrical Wire Explosion

et al. 2008

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The results of the investigation of the underwater electrical wire explosions using a high power nanosecond timescale generator are reported. The spectroscopic analysis of the emitted radiation has unveiled no evidence for the formation of shunting plasma channel. The latter appears in vacuum and gas wire explosions and causes to the seizure of energy deposition into an exploding wire material. The combination of mechanism for the suppression of formation of shunting channel together with the increased energy deposition rate allow busting the efficiency of energy deposition into the exploding wire. Estimated energy deposition into Cu and Al wire material of up to 200 eV/atom was reported. Careful analysis of the generated shock waves show, that 15 % of the deposited energy is transferred into the mechanical energy of the produced water flow. In addition experiments with converging shock waves produced by underwater explosion of cylindrical wire arrays demonstrated the possibility of producing shock waves with pressure amplitude up to 0.25 Mbar at 0.1 mm distance from the axis of the implosion.

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Addressing water vaporization in the vicinity of an exploding wire

Cited by 10 publications

References 17 publications

Comparison of electrical explosions of Cu and Al wires in water and glycerol

Comparison of electrical explosions of Cu and Al wires in water and glycerol

Underwater electrical wire explosion

Last Progress in Underwater Electrical Wire Explosion

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