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Bubble dynamics of a seismic airgun
journal contributionposted on 2023-05-18, 00:23 authored by de Graaf, KL, Paul BrandnerPaul Brandner, Irene PenesisIrene Penesis
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.
Publication titleExperimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics
Department/SchoolAustralian Maritime College
PublisherElsevier Science Inc
Place of publication360 Park Ave South, New York, USA, Ny, 10010-1710
Rights statementCopyright 2014 Elsevier Inc.