Interaction of the underwater explosion bubbles and nearby double-layer structures with circular holes

HE Ming; ZHANG Aman; LIU Yunlong

doi:10.11883/bzycj-2020-0110

Volume 40 Issue 11

Nov. 2020

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HE Ming, ZHANG Aman, LIU Yunlong. Interaction of the underwater explosion bubbles and nearby double-layer structures with circular holes[J]. Explosion And Shock Waves, 2020, 40(11): 111402. doi: 10.11883/bzycj-2020-0110

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HE Ming, ZHANG Aman, LIU Yunlong. Interaction of the underwater explosion bubbles and nearby double-layer structures with circular holes[J]. Explosion And Shock Waves, 2020, 40(11): 111402. doi: 10.11883/bzycj-2020-0110

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Interaction of the underwater explosion bubbles and nearby double-layer structures with circular holes

doi: 10.11883/bzycj-2020-0110

College of Shipbuilding, Harbin Engineering University, Harbin 150001, Heilongjiang, China

Received Date: 2020-04-08
Rev Recd Date: 2020-05-22
Publish Date: 2020-11-05

Abstract

Abstract

To address the problem of double-structures subjected to underwater explosion, the interaction mechanism between explosion bubbles and double-layer structures with circular hole was studied. And the characteristics such as cabin inrush and flow field change were analyzed by an Eulerian finite element numerical model. First of all, the numerical model was verified through discharge experiments, and it turned out that the numerical results agreed well with the experimental results. Then, the interaction behaviors under different initial conditions were summarized. Under the combined action of internal air, fluid inertia and breach induction, the bubble’s segmentation occurs during the bubble evolution process. When the size coefficient of the inner-layer breach is less than 0.5, the secondary water hump phenomenon occurs in the inner-cabin and the shape of the inrush is slender. When the explosive detonation position coefficient is less than 0.1, the re-closing and breaking of the free surface will take place. The influence of the free surface in the shell on the cabin inrush is complicated and when the water level is full, the rapid surge will reduce the emergency time of the ship.
- double-layer breach,
- underwater explosion,
- Eulerian finite element method,
- cabin inrush

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References(27)

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