Bubble and jet induced by underwater wire explosion in a narrow tube

Zhang Gui-fu; Zhu Yu-jian; Li Yuan-chao; Yang Ji-ming

doi:10.11883/1001-1455(2015)05-0609-08

Volume 35 Issue 5

Nov. 2015

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Zhang Gui-fu, Zhu Yu-jian, Li Yuan-chao, Yang Ji-ming. Bubble and jet induced by underwater wire explosion in a narrow tube[J]. Explosion And Shock Waves, 2015, 35(5): 609-616. doi: 10.11883/1001-1455(2015)05-0609-08

Citation:

Zhang Gui-fu, Zhu Yu-jian, Li Yuan-chao, Yang Ji-ming. Bubble and jet induced by underwater wire explosion in a narrow tube[J]. Explosion And Shock Waves, 2015, 35(5): 609-616. doi: 10.11883/1001-1455(2015)05-0609-08

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Bubble and jet induced by underwater wire explosion in a narrow tube

doi: 10.11883/1001-1455(2015)05-0609-08

Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, Anhui, China

Received Date: 2014-02-19
Rev Recd Date: 2015-01-20
Publish Date: 2015-10-10

Abstract

Abstract

A high-speed video camera was employed to record the flow field directly. Different explosion energy (discharging voltage) and explosion depth were examined. It is found that the surface jet formed in the narrow tube consists of a smooth upper body and a rough root, which differs from the general recognition of free surface jets. The bubble induced by the wire explosion underwent an expansion-collapse process, and the close-in collapse was characterized by a downward inner jet popping out from the bubble roof. The study also reveals that the strength of the surface jet increases with the explosion energy while decreases with explosion depth. A quasi-one-dimensional theoretical model was proposed to analyze the parametric dependences. It turns out not only the variation trend but also the exact value of both maximum bubble scale and jet velocity can be well predicted by this model.
- mechanics of explosion,
- jet,
- underwater wire explosion,
- straight tube,
- bubble

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References(15)

References

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