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Bubble dynamics of a seismic airgun

Citation

de Graaf, KL and Brandner, PA and Penesis, I, Bubble dynamics of a seismic airgun, Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics, 55 pp. 228-238. ISSN 0894-1777 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 Elsevier Inc.

Official URL: http://dx.doi.org/10.1016/j.expthermflusci.2...

DOI: doi:10.1016/j.expthermflusci.2014.02.018

Abstract

The dynamics of the bubble generated by a four port model-scale seismic airgun in an open top tank are investigated. The airgun is fired at 50 and 100 bar and bubble images are captured with low- and high-speed photography. Forward- and back-lit photography allows close observation of the phenomena at the gas–water interface, and measurement of the radial growth, respectively. The development of the Rayleigh–Taylor Instability on the bubble’s surface is identified. Field pressure measurements, synchronised in time with the radial bubble growth, are presented, and features of the emitted pressure signature are associated with the physical bubble dynamics. The experimental data is compared with an analytical prediction based on the Gilmore equation and good agreement is found for bubble radius, bubble period and the pressure pulse emitted at bubble collapse. The initial shock wave and first maximum velocity were over-predicted by this method.

Item Details

Item Type:Refereed Article
Keywords:seismic airgun, bubble dynamics, rayleigh-taylor instability
Research Division:Engineering
Research Group:Maritime Engineering
Research Field:Maritime Engineering not elsewhere classified
Objective Division:Defence
Objective Group:Defence
Objective Field:Navy
Author:de Graaf, KL (Dr Katrina De Graaf)
Author:Brandner, PA (Associate Professor Paul Brandner)
Author:Penesis, I (Associate Professor Irene Penesis)
ID Code:91107
Year Published:2014
Web of Science® Times Cited:5
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2014-05-08
Last Modified:2017-11-03
Downloads:0

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