单空泡与自由液面相互作用规律研究进展
RESERCH PROGRESS ON INTERACTION BETWEEN A SINGLE CAVITATION AND FREE SURFACE
查看参考文献123篇
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文摘
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空化与空泡溃灭现象普遍存在于自然界、水力机械和生物医学等领域.空泡与自由面相互作用会产生瞬态强烈耦合,涉及到空泡非球形溃灭、自由面非线性变形及失稳等现象,是流体力学领域重要的前沿与基础问题.本文围绕这一热点,从空泡非球形演化和自由面变形规律角度出发,概述和归纳近年该领域的研究进展与成果.对于近自由面空泡的非球形演化,基于表征开尔文冲量的无量纲参数,重点关注了体积振荡、射流生成、水锤效应及溃灭冲击波生成等关键过程,介绍了关键参数的理论建模方法,获得了空泡溃灭过程中能量分配机制.针对自由液面变形演化,根据细射流和粗射流生成和发展,归纳了4种典型现象及特点:透明水层及水柱生成、不稳定与稳定冠状水裙结构.进一步总结了开尔文冲量理论、界面凹陷奇点概念和泰勒不稳定性等理论模型的建立和应用,讨论了气泡溃灭过程、液面射流和界面稳定性等主要机制.此外,本文也概述了空泡脉动对球状、圆柱状等非平面液面变形行为的影响,归纳了曲率对于液面变形的影响机制.最后,针对目前研究状况提出该领域研究中尚未解决的问题,期望对将来的空泡及空泡群与自由液面相互作用深入研究提供借鉴. |
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其他语种文摘
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The phenomena of cavitation have been observed in various natural and industrial processes like biomedical engineering and marine engineering. The interaction between a single bubble and free surface, involving the non-spherical collapse of cavitation bubble, nonlinear deformation and instability of free surface, etc., is frontier scientific issues in fluid mechanics and bubble dynamics. In this paper, we summarize research progress and achievements of this field in recent years and discuss typical phenomenon from the perspectives of cavitation dynamics and splash behaviors. For the nonspherical evolution of cavitation bubble, we focus on the key processes such as volume oscillation, jet generation, water hammer effect, collapsing shock wave, and centroid migration based on the dimensionless parameter of kelvin impulse. The mechanism of energy distribution during the cavitation collapse is obtained. For the splash dynamics of free surface, four typical phenomena are summarized based on the generation and development of the thin jet and thick jet: formation of transparent water layer, generation of water column, stable and unstable structure of water crown. Furthermore, we review physical mechanisms on the collapse of cavitation, splash and instability of the free surface by using the theories of Kelvin impulse, Singularity at the curved surface, and Rayleigh-Taylor instability. In addition, we present the effect of curved surfaces on the splash dynamics by investigating the behaviors of free surface of spherical and cylindrical shapes. Finally, remaining challenges and development tendency for future research are given. |
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来源
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力学学报
,2019,51(6):1682-1698 【核心库】
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DOI
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10.6052/0459-1879-19-328
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关键词
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非球形演化
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自由面变形
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细射流
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粗射流
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冠状水裙
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地址
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1.
中国科学院力学研究所, 中国科学院流固耦合系统力学重点实验室, 北京, 100190
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中国科学院大学工程科学学院, 北京, 100049
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语种
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中文 |
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文献类型
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综述型 |
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ISSN
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0459-1879 |
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学科
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力学;水利工程 |
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基金
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国家重点研发计划
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国家自然科学基金
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文献收藏号
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CSCD:6631807
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