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Study on the interaction betweenthe bubble and the free surface nearby the round bilge |
TIAN Zhao-li1,2,GAO Li-feng3,LIU Yun-long1 |
1.Wuhan 2nd Ship Research and Design Institute, Wuhan 430205, China;
2.Shanghai Waigaoqiao Shipbuilding & Offshore Engineering design Co., Ltd.,Shanghai 200137, China |
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Abstract The nonlinear interaction between the underwater explosion bubble and the free surface nearby the round bilge is studied with the bubble dynamics model based on Boundary Element Method. Firstly, the numerical bubble dynamics model under the ideal and incompressible assumption is established in this paper. Then for the overconstrain problem caused by the intersection between the rigid wall and the free surface, the traditional numerical model is improved by introducing the double nodes method to split each intersection node up to2 parts and considering the continuity conditions. With the present model, the researches on the interaction between the bubble and complex boundaries are extended. The influences of the attack angle, the initial distance of the charge and the buoyancy on the bubble and free surface dynamics are analyzed respectively. The conclusion can provide references for the anti-shock research and design of the warships.
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Received: 13 January 2015
Published: 15 March 2016
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[1] Blake J R, Gibson D C. Growth and collapse of a vapour cavity near a free surface[J]. Journal of Fluid Mechanics, 1981,111: 123-140.
[2] Chahine G L, Hsiao C T. 3DYNAFS© a three-dimensional free surface and bubble dynamics code bubble dynamics Version 4.1 [C]. Dynaflow, INC., User Manual,2006.
[3] Pearson A, Cox E,Blake J R,et al. Bubble interactions near a free surface[J]. Engineering Analysis With Boundary Elements, 2004,28(4): 295-313.
[4] Wang Q X, Yeo K S,Khoo B C,et al. Strong interaction between a buoyancy bubble and a free surface. Theoretical and Computational Fluid Dynamics, 1996. 8(1): 73-88.
[5] Blake J R, Gibson D C. Cavitation bubbles near boundaries[J]. Annual Review of Fluid Mechanics, 1987, 19: 99-123.
[6] Wang Q X. The evolution of a gas bubble near an inclined wall[J]. Theoretical and Computational Fluid Dynamics, 1998, 12(1):29-51.
[7] Klaseboer E, Hung K C, Wang C, et al. Experimental and numerical investigation of the dynamics of an underwater explosion bubble near a resilient/rigid structure[J]. Journal of Fluid Mechanics, 2005,53(7): 387-413.
[8] Klaseboer E, Khoo B C, Hung K C. Dynamics of an oscillating bubble near a floating structure[J]. Journal of Fluids and Structures, 2005,10(2): 1-10.
[9] 初文华,张阿漫,王诗平. 壁面与自由液面联合作用下气泡动态特性实验研究[J]. 振动与冲击,2013,32(13):112-117.
CHU Wen-hua, ZHANG A-man,WANG Shi-ping. Experimental study on bubble pulse features under combined action of wall and free surface[J]. Journal of Vibration and Shock,2013,32(13):112-117.
[10] 刘云龙,汪玉,张阿漫. 有倾角的竖直壁面附近气泡与自由面相互作用研究[J]. 物理学报,2013,62(21):267-276.
LIU Yun-long, WANG Yu, ZHANG A-man. Interaction between bubble and free surface nearvertical wall with inclination[J]. Acta Physica Sinica,2013,62(21):267-276
[11] Wang Q X. Unstructured MEL modeling of nonlinear unsteady ship waves[J]. Journal of Computational Physics, 2005,210(1): 368-385.
[12] Ni B Y, Zhang A M, Wu G X. Numerical simulation of motion and deformation of ring bubble along body surface[J]. Applied Mathematics and Mechanics, 2013, 34(12): 1495-1512.
[13] Cole R H. Underwater explosion[M]. Princeton USA: Princeton University Press,1948.
[14] Zhang A M, et al. Numerical simulation of column charge underwater explosion based on SPH and BEM combination[J]. Computers & Fluids, 2013,71(30): 169-178.
[15] Wang C, Khoo B C, Yeo K S. Elastic mesh technique for 3D BIM simulation with an application to underwater explosion bubbles[J]. Computers & Fluids, 2003,32(9): 1195-1212.
[16] Turangan C K, Ong G P,Klaseboer E,et al. Experimental and numerical study of transient bubble-elastic membrane interaction[J]. Journal of Applied Physics, 2006,100(5): 054910.
[17] Best J P, Kucera A. A numerical investigation of non-spherical rebounding bubbles[J]. Journal of Fluid Mechanics, 1992,245: 137-191.
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