Experimental Study on Bubble Velocity Characteristics in Water under Sway Motion
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摘要: 针对横向震荡条件下气泡的速度特性进行实验研究。设计横向震荡实验台,通过高速摄像机记录横向震荡条件下气泡的运动状态,通过追踪气泡的运动轨迹,提取气泡的运动参数,得到不同横向震荡周期(T)下气泡的速度和轨迹。对比不同横向震荡T下气泡的运动状态,结果表明:横向震荡引入的附加惯性力和液面晃荡对气泡水平速度、竖直速度和气泡轨迹均有明显影响;横向震荡T越长,气泡水平速度的峰值越大,气泡的轨迹越曲折,气泡竖直速度越小。与附加惯性力相比,流场对气泡的冲击作用对气泡水平速度的影响更大。Abstract: Experimental study of bubble velocity characteristics under sway motion is carried out. An experimental system is designed and manufactured. A fast camera is used to record the behavior of the bubbles. By tracking the path of the bubbles, movement parameters of the bubble are obtained under different motion conditions. It is found that the horizontal velocity, vertical velocity and path of bubbles are all obviously influenced by the inertial force and sloshing of free surface which are both induced by sway motion. The longer the sway motion period is, the greater the peak horizontal velocity is, and the sharper the path is and the shorter the vertical velocity is. Compared with inertial force, sloshing of free surface has a greater impact on the horizontal velocity.
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Key words:
- Sway motion /
- Bubble velocity /
- Inertial force /
- Sloshing
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