椭圆附近的柱形泡动力学行为理论研究  

Study on Dynamics of the Cylindrical Cavitation Bubble Near an Ellipse

作　　者：沈钧炜 李绍玮 张宇宁[1,2] SHEN Junwei;LI Shaowei;ZHANG Yuning(Key Laboratory of Power Station Energy Transfer Conversion and System,Ministry of Education,North China Electric Power University,Beijing 102206,China;School of Energy,Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学电站能量传递转化与系统教育部重点实验室,北京102206 [2]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《核科学与工程》2024年第5期1010-1017,共8页Nuclear Science and Engineering

基　　金：国家自然科学基金资助项目(No.51976056)。

摘　　要：开尔文冲量在泡动力学领域可用来预测空泡溃灭时的射流现象。基于开尔文冲量理论,本文对椭圆附近的柱形泡动力学行为进行了理论研究,通过理论模型分析了椭圆及空泡周围的液体速度场分布特征,探究了椭圆壁面曲率、空泡位置等因素对开尔文冲量的影响规律。主要结论如下:构建了预测椭圆附近柱形泡动力学行为的开尔文冲量理论模型;当空泡在椭圆附近溃灭时,椭圆表面附近会产生低速区;开尔文冲量主要受空泡位置、椭圆壁面曲率及空泡与壁面的距离影响。Kelvin impulse can be employed in the field of bubble dynamics to predict the jet phenomena during the bubble collapse process.In the present paper,based on the Kelvin impulse theory,the dynamic behaviors of the cylindrical bubble near an ellipse are theoretically studied.The distribution characteristics of the liquid velocity field around the ellipse and the bubble are analyzed through the theoretical model.The effects of the curvature of the ellipse and the location of the bubble on the Kelvin impulse are investigated.The main conclusions include:The Kelvin impulse theoretical model is established to predict the dynamic behaviors of the cylindrical bubble near an ellipse.When a bubble collapses near an ellipse,a low-velocity region will be generated near the ellipse surface.The Kelvin impulse intensity is mainly affected by the bubble position,curvature of the ellipse,and the distance between the bubble and the ellipse.

关 键 词：空泡动力学 柱形泡 椭圆壁面 开尔文冲量 

分 类 号：O351.2[理学—流体力学]