摘要
本文从流体动力学角度探究气泡下沉现象的机理,对垂直振动圆柱容器中的气泡下沉行为进行了系统研究。根据附加质量以及气泡压缩性概念,建立出现下沉效应的可压缩性气泡数学模型,并通过分离变量法分析气泡下沉的临界位移以及运动速度。研究表明,正弦激励振幅以及频率是影响气泡下沉条件的重要因素,决定了临界位移与运动速度的大小,且振幅和频率越大,临界位移越小,气泡越容易下沉。
The mechanism of the bubble subsidence is studied based on hydrodynamics, focusing on the bubble subsidence behavior in vertically vibrating cylindrical vessels. With the consideration of additional mass and bubble compressibility, a mathematical model of the compressible bubble with subsidence effect is established, and the critical displacement and velocity of the bubble subsidence are obtained by the separating variable method. The results show that the amplitude and the frequency of the sinusoidal excitation are the important factors affecting the bubble subsidence, and they are closely related with the critical displacement and velocity, and the larger the amplitude and the frequency, the smaller the critical displacement, the easier the bubble sinks.
作者
张旭
李晋斌
ZHANG Xu;LI Jinbin(College of Science,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;College of Automation,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《力学与实践》
北大核心
2020年第3期282-288,共7页
Mechanics in Engineering
关键词
可压缩性气泡
下沉条件
正弦振动
分离变量法
临界位移
compressibility bubble
subsidence condition
sinusoidal vibration
separation of variables
critical displacement
