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首页> 外文会议>2006 BIMW >Flow Field and Gas-bubble Size Analysis in Water Model for the Process of Aluminum Melt Degassing by Particle Image Velocimetry
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Flow Field and Gas-bubble Size Analysis in Water Model for the Process of Aluminum Melt Degassing by Particle Image Velocimetry

机译：熔体脱气过程水模型中流场和气泡尺寸的粒子图像测速分析

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The flow field and gas-bubble size during the process of aluminum melt degassing were investigated in water model. A Φ400mm×400mm transparent water model and an impellor degassing device were used in this study. The instantaneous velocity fields of water and bubbles under the mixture of rotary injector were measured with PiV velocity field measurement technique. Then the pictures of bubbles gained from PIV were analyzed with software to get the bubble size distribution. The results showed that bubble flow field and bubble size were influenced by rotary speed of rotor and gas flow-rate. With the increase of rotary speed of rotor, the horizontal velocity components of bubbles became larger, the stagnant time of bubbles in water increaseed correspondingly and bubble size became smaller. With the increase of gas flow-rate, the longitudinal velocity components of bubbles became larger, the stagnant time of bubbles in water decreased correspondingly, and the bubble size became larger also.
机译：在水模型中研究了铝熔体脱气过程中的流场和气泡大小。本研究采用Φ400mm×400mm透明水模型和叶轮除气装置。利用PiV速度场测量技术，测量了旋转喷油器内水和气泡的瞬时速度场。然后使用软件分析从PIV获得的气泡图片，以获得气泡尺寸分布。结果表明，气泡流场和气泡大小受转子转速和气体流量的影响。随着转子转速的增加，气泡的水平速度分量变大，水中气泡的停滞时间相应增加，气泡尺寸变小。随着气体流速的增加，气泡的纵向速度分量变大，水中的气泡停滞时间相应减少，气泡的尺寸也变大。

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