摘要
气泡在近自由液面运动过程中与自由液面发生强烈的耦合作用,自由液面会出现极其复杂的物理现象,形成的水冢类型繁多.本文将针对皇冠型水冢,基于势流理论,建立气泡与自由液面耦合作用的数值模型,并在气泡完成射流向下运动时,忽略气泡对自由液面的影响,继续模拟自由液面的运动过程.同时利用高速摄影对近自由面的电火花气泡进行实验研究,数值结果与实验符合良好,相对误差在10%以内.通过数值计算,发现了围裙卷缩和主峰珠化等特殊的物理现象,研究了气泡初始条件与韦伯数对皇冠型水冢动态特性的影响,旨为皇冠型水冢的研究提供参考.
Strong interaction between bubble and free-surface will cause complex phenomena, producing many different types of spike. Based on potential flow theory, a numerical model was established to simulate the crown spike. A downward jet was formed during the bubble＇s collapsing, and simulation of the free-surface was continued regard less of the ring bubble＇s effect on it. Simulation results show good agreement with the experiment conducted with a high speed camera and a spark-generated device, and the relative error was less than 10%. Some special phenomena were found through numerical calculation, such as apron-shrink and peak-dropped. Finally, the effects of initial condition and Weber number on crown-type water column were studied.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第19期300-310,共11页
Acta Physica Sinica
基金
优秀青年科学基金(批准号:51222904)
国家自然科学基金重点项目(批准号:50939002)
国家安全重大基础研究项目(批准号:613157)资助的课题~~
