Underwater Electrical Explosion of Wires and Wire Arrays and Generation of Converging Shock Waves
Underwater Electrical Explosion of Wires and Wire Arrays and Generation of Converging Shock Waves
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DOI：
10.1109/tps.2015.2513757
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发表时间：
2016-01
影响因子：
1.5
通讯作者：
Y. Krasik;S. Efimov;D. Sheftman;A. Fedotov-Gefen;O. Antonov;D. Shafer;D. Yanuka;M. Nitishinskiy;M. Kozlov;L. Gilburd;G. Toker;S. Gleizer;E. Zvulun;V. Gurovich;D. Varentsov;M. Rodionova
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文献类型：
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作者：
Y. Krasik;S. Efimov;D. Sheftman;A. Fedotov-Gefen;O. Antonov;D. Shafer;D. Yanuka;M. Nitishinskiy;M. Kozlov;L. Gilburd;G. Toker;S. Gleizer;E. Zvulun;V. Gurovich;D. Varentsov;M. Rodionova
简要回顾了利用微秒、亚微秒和纳秒级大电流发生器对电线和线阵进行水下电爆炸的最新研究成果。在微秒级导线爆炸中，结合状态方程和现代电导率模型的磁流体力学计算结果与实验结果吻合较好。相反，在纳秒级导线爆炸中，为了与实验数据拟合，对导线电阻和状态方程进行了修正。在圆柱形和球形线阵的实验中，证明了会聚激波的产生允许在汇聚激波的轴线或原点附近形成水的极端状态。此外，结果还表明，超球几何中的SW型收敛可以获得比球形内爆情况下更大的收敛轴附近水的压力、密度和温度。实验和数值分析的结果表明，圆柱波沿其收敛的主要路径保持对称性。此外，研究还表明，X夹丝结构和锥形丝阵的水下电爆炸可以在不使用化学爆炸的情况下分别产生金属和水的快速射流。
A brief review of the results obtained in recent research of underwater electrical explosions of wires and wire arrays using microsecond-, submicrosecond-, and nanosecond-timescale high-current generators is presented. In a microsecond-timescale wire explosion, good agreement was attained between the results of experiments and the results of magnetohydrodynamic calculations coupled with equations of state (EOS) and modern conductivity models. Conversely, in a nanosecond-timescale wire explosion, the wire resistance and the EOS were modified in order to fit experimental data. In experiments with cylindrical and spherical wire arrays, generation of a converging shock wave (SW) was demonstrated allowing formation of an extreme state of water in the vicinity of either the axis or the origin of the SW's implosion. In addition, it is shown that SW convergence in superspherical geometry allows one to achieve larger values of pressure, density, and temperature of water in the vicinity of the axis of convergence than in the case of a spherical implosion. The results of experiments and numerical analysis showed that a cylindrical SW keeps its symmetry along the main path of its convergence. In addition, it is shown that underwater electrical explosion of an X-pinch wire configuration and a cone wire array allows one to generate fast jets of metal and water, respectively, without using chemical explosions.