The results of experimental and numerical research of shockwaves generated by the underwater electrical explosion of a single wire and a planar wire array are reported. Experiments were conducted using a microsecond time scale pulse power generator delivering a <210 kA current with a <1 μs rise time. Streak and fast framing cameras were used to study the time- and space-resolved evolution of the shocks. The results show that (a) an aperiodic discharge constitutes the most efficient method of generating a shockwave; (b) in the case of a planar wire array, an almost simultaneous explosion can be obtained when the individual wire diameter is <100 μm (current density >2 × 107 A/cm2); (c) the planar shock velocity can be accelerated using the combustion properties of the Al wires efficiently, and (d) the shock velocity can be enhanced using a metal reflector placed below the array.
Particularities of shocks generated by underwater electrical explosions of a single wire and wire arrays
A. Rososhek, S. Efimov, A. Virozub, D. Maler, Ya. E. Krasik; Particularities of shocks generated by underwater electrical explosions of a single wire and wire arrays. Appl. Phys. Lett. 12 August 2019; 115 (7): 074101. https://doi.org/10.1063/1.5115134
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