Convergence of shock waves generated by underwater electrical explosion of cylindrical wire arrays between different boundary geometries

Journal Article · Thu Oct 15 04:00:00 EDT 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4934217· OSTI ID:22486445

Yanuka, D.; Zinowits, H. E.; Krasik, Ya. E. ^[1]; Kozlov, M. ^[2]

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1. Physics Department, Technion, Haifa 32000 (Israel)
2. Center for Energy Research, National Laboratory Astana, Nazarbayev University, Astana 010000, Republic of Kazakhstan (Kazakhstan)

The results of experiments and numerical simulations of a shock wave propagating between either conical or parabolic bounding walls are presented. The shock wave was generated by a microsecond timescale underwater electrical explosion of a cylindrical wire array supplied by a current pulse having an amplitude of ∼230 kA and a rise time of ∼1 μs. It is shown that with the same energy density deposition into the exploding wire array, the shock wave converges faster between parabolic walls, and as a result, the pressure in the vicinity of convergence is ∼2.3 times higher than in the case of conical walls. The results obtained are compared to those of earlier experiments [Antonov et al., Appl. Phys. Lett. 102, 124104 (2013)] with explosions of spherical wire arrays. It is shown that at a distance of ∼400 μm from the implosion origin the pressure obtained in the current experiments is higher than for the case of spherical wire arrays.

• OSTI ID: 22486445
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 10 Vol. 22; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMPLITUDES
COMPUTERIZED SIMULATION
CONVERGENCE
CYLINDRICAL CONFIGURATION
DEPOSITION
ENERGY DENSITY
EXPLODING WIRES
EXPLOSIONS
IMPLOSIONS
PULSE RISE TIME
PULSES
SHOCK WAVES
SPHERICAL CONFIGURATION
UNDERWATER
WALLS