排灌机械工程学报2025，Vol.43Issue(5)：470-476,7.DOI:10.3969/j.issn.1674-8530.23.0205
近壁面单泡形态演变及其诱导能量特性分析
Analysis of morphological evolution and induced energy characteristics of near-wall single bubble
摘要
Abstract
In order to study the morphological change of near-wall single bubble and the accompanied energy effects,a finite element numerical model was established.The influences of dimensionless dis-tance,initial radius and inner contents on the bubble dynamics were analyzed.After deriving and sol-ving the bubble collapse energy governing equation,the characteristics of water kinetic energy and bubble potential energy over time under different conditions were obtained.The results show that the near-wall bubble morphology changes are influenced by dimensionless distances,initial bubble radii,and the composition of the bubble contents.The smaller the dimensionless distance,the longer the time required for the bubble to reach its maximum radius,while the influence of the initial radius on these parameters is opposite.In addition,the type of atmosphere inside the bubble exerts different effects on the total time of bubble collapse,due to different physical properties of the gases,including the solu-bility,molecular volume,etc.Under different conditions,the variation trend of kinetic energy in liquid area is basically the same,showing a downward parabola with three parts.Except for the slight fluctua-tion in the initial stage of bubble growth,the general trend of bubble potential energy change is firstly increased and then decreased,in which the dimensionless distance has the least effects.The research method in this paper provides a reference for the study of emitted energy for near-wall cavitation bub-bles.关键词
近壁面单泡/无因次距离/空泡半径/空泡内容物/能量特性Key words
near-wall single bubbles/dimensionless distance/bubble radius/bubble content/energy characteristics分类
农业工程引用本文复制引用
洪锋,雷恩宏,向可心,邵哲闻,袁喜,贾金平,应迪文,黄应平..近壁面单泡形态演变及其诱导能量特性分析[J].排灌机械工程学报,2025,43(5):470-476,7.基金项目
国家自然科学基金重点资助项目(22136003) （22136003）
湖北省教育厅科学技术研究计划青年人才项目(Q20211202) （Q20211202）
