Experimental study on bubble pulse features and plume under hypobaric condition
Cui-jie1，Cui-pu2，Zhou Sai-bei1，Yao Xiong-liang2
1. School of Naval Architecture and Offshore Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003，
2. College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001
Near-field underwater explosion bubble will be coupled with the hull, free surface of liquid due to prodigious buoyancy. This problem can’t be solved by theory or numerical method, because of the complexity of the boundary and the sensitivity of the bubble breaking controlled by parameters. The similarity with the real situation can’t be guaranteed because current research methods mostly adopt smaller bubble which generates smaller buoyancy. In order to study on the interaction between near-field bubble and free surface of liquid, a multi-function experimental apparatus operating under reduced air pressure is designed according to the similarity theory of underwater explosion bubble. The changing processes of bubble form near free surface and different phenomena of bubble plume were obtained through the experiment considering buoyancy changing. Finally, on the basis of a large amount of experimental data, the change laws of motion period of bubble near free surface, jet velocity and height of bubble plume, etc. with the variation of distance and buoyancy were found. The work provides references for the relevant theoretical and numerical research.
崔杰1，崔璞2，周塞北1，姚熊亮2. 减压条件下近自由面气泡运动与水冢现象实验研究[J]. 振动与冲击, 2015, 34(19): 37-42.
Cui-jie1，Cui-pu2，Zhou Sai-bei1，Yao Xiong-liang2. Experimental study on bubble pulse features and plume under hypobaric condition. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(19): 37-42.
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