Ocean Engineering, Jan 1, 2014, Vol.75, p.46(7)
To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.oceaneng.2013.11.008 Byline: Yunlong Liu, Aman Zhang, Zhaoli Tian Abstract: On the basis of boundary element method, this paper constructs a numerical model of underwater explosion bubble, and then develops singularities approximation method of bubble induced flow field from the view point of potential flow theory. A point source is adopted to simulate bubble pulsation, and meanwhile a point dipole is applied to simulate asymmetry caused by both the migration and deformation of the bubble. Through the analysis of the relationship between the strength of equivalent singularities and dimensionless parameters, we find that strength parameter has few effects on equivalent point source. And with the increase of buoyancy parameter, considerable strength is added to point dipole instead of point source. Through the comparison with the numerical results of point dipole strength under the traditional spherical hypothesis, the traditional method is revised to consider non-spherical deformation in order to shed some light on research on underwater explosion bubble dynamics and anti-shock performance of ships. Author Affiliation: (a) College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China (b) Wuhan 2nd Ship Design and Research Institute, 430064, China Article History: Received 27 October 2012; Accepted 2 November 2013
Explosions – Analysis
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