Wire explosion at reduced pressures

Eun Soo Lee; So Young Song; Kyu Soo Jhung; Ung Kim; Sang-Soo Lee

doi:10.1117/12.24066

1 April 1991 Wire explosion at reduced pressures

Eun Soo Lee, So Young Song, Kyu Soo Jhung, Ung Kim, Sang-Soo Lee

Proceedings Volume 1358, 19th Intl Congress on High-Speed Photography and Photonics; (1991) https://doi.org/10.1117/12.24066
Event: 19th International Congress on High-Speed Photography and Photonics, 1990, Cambridge, United Kingdom

Abstract

Explosion phenomena of silver wires at reduced environmental air pressures have been investigated by applying oscillo-streak photographic technique, which has been designed for more exact temporal correlation between the oscilloscopic and streak records. Expanding speeds of metal cloud and shock wave increase at reduced pressure. However, for constant wire and discharging circuit parameters, traces of currents and voltages are not altered until the breakdown through metal cloud or air takes place. The critical pressure, below which the air surrounding metal cloud breaks down before the wire has been ruptured completely, has been found to be dependent on wire length and peak voltage induced during the rupture process in atmospheric condition. The empirical relationship between the ambient pressure, breakdown voltage, and wire length implies similarity between the breakdown of air ahead of the expanding metal cloud and the surface flash over of insulator at low pressure. Present results could support the concept that a metal wire bursts into nonconducting metal particles on the surface of the wire and the disintegration proceeds toward the wire axis.

Citation Download Citation

Eun Soo Lee, So Young Song, Kyu Soo Jhung, Ung Kim, and Sang-Soo Lee "Wire explosion at reduced pressures", Proc. SPIE 1358, 19th Intl Congress on High-Speed Photography and Photonics, (1 April 1991); https://doi.org/10.1117/12.24066

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