Expanding of fire-ball and subsequent shock wave propagation by explosives detonation in underwater
- Authors
- Kwak, H.-Y.; Kang, K.-M.; Ko, I.
- Issue Date
- 2011
- Citation
- ASME-JSME-KSME 2011 Joint Fluids Engineering Conference, AJK 2011, v.1, no.PARTS A, B, C, D, pp 2833 - 2840
- Pages
- 8
- Journal Title
- ASME-JSME-KSME 2011 Joint Fluids Engineering Conference, AJK 2011
- Volume
- 1
- Number
- PARTS A, B, C, D
- Start Page
- 2833
- End Page
- 2840
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/65064
- DOI
- 10.1115/AJK2011-16001
- ISSN
- 0000-0000
- Abstract
- A well known problem in hydrodynamics involves the sudden release of explosion energy, concentrated in a finite volume, to surroundings with uniform density. However, only similarity solutions which have no detailed information on the behavior of the fire-ball are available on this problem. In this study, we obtain a set of analytical solutions for the time dependent radius of expanding fire-ball after explosives detonation by solving continuity, Euler and energy equations with a polytope assumption for the fire-ball center. Subsequent spherical shock waves developed from the fire-ball in underwater are obtained by Kirkwood-Bethe hypothesis with Tait's equation of state for water. The pressure waves emanating from the oscillating bubble in underwater, which has a notably different time scale from the shock wave generation, are obtained using the Rayleigh equation. The calculated results of period and the maximum radius of bubble developed from the fire-ball and the pressure wave from the oscillating bubble are similar to those observed. Copyright © 2011 by ASME.
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