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Addressing the efficiency of the energy transfer to the water flow by underwater electrical wire explosion

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5 Author(s)
Efimov, S. ; Physics Department, Technion, Haifa 32000, Israel ; Gurovich, V.T. ; Bazalitski, G. ; Fedotov, A.
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Experimental and hydrodynamic simulation results of submicrosecond time scale underwater electrical explosions of planar Cu and Al wire arrays are presented. A pulsed low-inductance generator having a current amplitude of up to 380 kA was used. The maximum current rise rate and maximum power achieved during wire array explosions were dI/dt≤830 A/ns and ∼10 GW, respectively. Interaction of the water flow generated during wire array explosion with the target was used to estimate the efficiency of the transfer of the energy initially stored in the generator energy to the water flow. It was shown that efficiency is in the range of 18%–24%. In addition, it was revealed that electrical explosion of the Al wire array allows almost double the energy to be transferred to the water flow due to efficient combustion of the Al wires. The latter allows one to expect a significant increase in the pressure at the front of converging strong shock waves in the case of cylindrical Al wire array underwater explosion.

Published in:

Journal of Applied Physics  (Volume:106 ,  Issue: 7 )

Date of Publication:

Oct 2009

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