摘要
采用铜丝电极低电压条件下打火生成气泡方法，配合高速摄影技术研究两平行板间与筒状区域构成的对称边界附近气泡脉动特性。气泡生成位置位于两平行板与筒状区域中心。气泡在两平行板间运动时，气泡会在中间撕裂成两小气泡，形成的两小气泡射流方向相反，且指向平行板。随两平行板间无量纲距离的减小，依次出现回弹撕裂、相背射流及连通射流等不同坍塌运动形式。气泡在圆、方筒中运动时会形成“红细胞”型及对射流，对射流穿透气泡形成环形气泡继续坍塌，射流方向指向筒壁。通过对称边界条件下气泡运动特性研究，旨在为不同边界条件下气泡坍塌形式提供参考。
Abstract
Bubble collapse under different boundary conditions has long been a hot topic in research on bubble dynamics. The Bubble motions between two parallel plates and in cylinder region are studied experimentally with low-voltage electric spark bubble generator and high-speed camera. Bubbles are generated at the center of the region to ensure its symmetric motion. Between parallel plates, the bubble will be teared apart from the middle into two smaller bubbles, with the jets of both directed towards the plates. As the dimensionless distance between two plates decreases, the following three motion patterns are observed: rebound and split, adverse jet, and connected jet. In cylinder and square cylinder regions, the bubble evolves into a red blood cell shape and a ring-bubble is generated at the end of jetting with its jet points towards cylinder wall. The study on bubble motion characteristics presented here could be useful references for researches on collapse patterns near different types of boundaries.
关键词
气泡脉动 /
对称边界 /
坍塌射流 /
实验 /
Bjerknes效应
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Key words
Bubble pulsation /
Symmetric boundary /
Collapse jet /
Experiment /
Bjerknes effect
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王诗平.;张阿漫;吴 超..
对称边界条件下气泡脉动特性实验研究[J]. 振动与冲击, 2014, 33(20): 118-122
WANG Shi-ping.;ZHANG A-man;WU Chao..
Experimental study on characteristics of bubble pulsation near symmetric boundary[J]. Journal of Vibration and Shock, 2014, 33(20): 118-122
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脚注
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