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本文应用边界元方法研究了两个相邻空泡的运动特性,得到了空泡的演化规律,以及空泡溃灭时的射流速度与溃灭时间的变化趋势,对于两个空泡之间的距离和半径比的影响进行了讨论。计算结果表明:不同大小的空泡在一起时则小泡会先溃灭,且小泡的存在时间与两泡的半径比成正比;大泡对小泡来说其作用相当于一固壁面,小泡会形成一指向大泡的溃灭射流。相同大小的空泡在一起溃灭时,会同时形成指向中间的射流,与单空泡在固壁面附近的溃灭情形相当。这些结果对多空泡及空泡云的研究有一定的参考价值。
In this paper, the boundary element method is used to study the motion characteristics of two adjacent cavities. The evolution law of cavitation bubbles and the changing trend of the velocity and collapse time of cavitation bubbles are obtained. For the two cavities The effects of distance and radius ratio are discussed. The calculated results show that the vesicles will collapse first when the vacuoles of different sizes are together, and the existence time of the vesicles is proportional to the ratio of the radii of the two bubbles. The effect of the bubbles on the vesicles is equivalent to a solid wall, The vesicles will form a collapse jet that points to the bubble. When the same size bubble collapses together, it will simultaneously form a jets pointing in the middle, which is equivalent to the situation of single bubble collapse near the solid wall. These results have certain reference value for the research of multi-vacuoles and vacuole clouds.