Discharge and post-explosion behaviors of electrical explosion of conductors from a single wire to planar wire array |
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Affiliation: | 1. Research Center for Electrostatics and Applications, Beijing Institute of Technology, Beijing 10081,
People's Republic of China 2. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University
of Science and Technology, Wuhan 430074, People's Republic of China 3.State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an
710049, People's Republic of China |
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Abstract: | This work deals with an experimental study of a Cu planar wire array (PWA) in air and water under the stored energy 300–1200 J. A single Cu wire is adopted as a controlled trial. Four configurations of PWA and a wire with the same mass (cross-section area) but the different specific surface areas (15–223 cm2 g?1) are exploded. The transient process is analyzed using high-speed photography in combination with the results of optical emission and discharge. Discharge characteristics revealed that PWA always has a higher electric power peak, early but higher voltage peak, as well as faster vaporization and ionization process than the single-wire case. Two to three times stronger optical emission could be obtained when replacing the single-wire with PWA, indicating a higher energy-density state is reached. Phenomenologically, in both air and water, single-wire load tends to develop a transverse stratified structure, while PWA is dominated by the uneven energy deposition among wires. Finally, the synchronism and uniformity of the PWA explosion are discussed. |
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Keywords: | electrical explosion   wire array metal plasma plasma radiation shock wave |
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