静止水中单气泡形状及上升规律的实验研究

发布时间：2018-04-12 08:35

本文选题：高速摄影法 + 气泡形状　；参考：《中南大学学报(自然科学版)》2016年07期

【摘要】：为了研究静止液体中单气泡的形状及运动规律,以静止水中运动的单气泡为研究对象,采用高速摄影法和数字图像处理技术,通过实验研究单气泡在水中生成及上升的过程。提出用气泡圆形度C描述气泡形状,采用不同量纲一参数对气泡圆形度进行预测,并分析气泡运动轨迹、终速度的变化规律。研究结果表明:采用We数或Re数对气泡圆形度进行预测效果最好;气泡在运动过程中的轨迹呈直线型、之字型、螺旋型3种形态,且终速度随气泡变形的加剧而变化,气泡形状为球形时运动速度最小,为球帽形时速度最大。
[Abstract]:In order to study the shape and motion of a single bubble in a static liquid, the formation and rising process of a single bubble in the water was studied by means of high speed photography and digital image processing.Bubble roundness C is used to describe bubble shape, different dimensionality and parameters are used to predict bubble roundness, and the changing law of bubble motion track and final velocity is analyzed.The results show that We number or re number is the best method to predict the roundness of bubbles, and the trajectory of bubbles is linear, zigzag and spiral, and the final velocity varies with the increase of bubble deformation.When the bubble shape is spherical, the velocity is the smallest, and when the bubble is spherical, the velocity is the largest.
【作者单位】：中南大学能源科学与工程学院;中南大学粉末冶金研究院;
【基金】：国家自然科学基金创新群体项目(61321003) 中南大学中央高校基本科研业务费专项资金资助项目(2015zzts205) 湖南省研究生科研创新项目(CX2014B063)~~
【分类号】：TP391.41;O35

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