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Proceedings Paper

Wire explosion at reduced pressures
Author(s): Eun Soo Lee; So Young Song; Kyu Soo Jhung; Ung Kim; Sang-Soo Lee
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Paper 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.

Paper Details

Date Published: 1 April 1991
PDF: 7 pages
Proc. SPIE 1358, 19th Intl Congress on High-Speed Photography and Photonics, (1 April 1991); doi: 10.1117/12.24066
Show Author Affiliations
Eun Soo Lee, Agency for Defense Development (South Korea)
So Young Song, Agency for Defense Development (South Korea)
Kyu Soo Jhung, Agency for Defense Development (South Korea)
Ung Kim, Yonsei Univ. (South Korea)
Sang-Soo Lee, Korea Advanced Institute of Science and Technology (South Korea)

Published in SPIE Proceedings Vol. 1358:
19th Intl Congress on High-Speed Photography and Photonics
Peter W. W. Fuller, Editor(s)

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