竖直楔形流道的单气泡上升过程的实验研究

摘要

An experiment has been made to study the behavior of a single bubble rising in a vertical wedge-shaped channel.By means of a high speed digital camera and computer image processing technology (CIPT),the bubble's deformation and trajectory in the channel is recorded accurately.Through analyzing the regulation of rotation angle,instantaneous velocity and instantaneous acceleration of bubble during bubble's rising process,the characteristics of bubble motion are analyzed in details and the calculating formula of drag coefficient is deduced.%通过实验对竖直楔形流道内单气泡上升过程的行为特性进行了研究.利用高速摄影设备和计算机图像处理技术准确地追踪了气泡上升过程中运动轨迹和形态的变化.通过对气泡上升过程中旋转角、瞬时速度、瞬时加速度等参数的分析,找到了楔形流道内气泡上升过程的运动规律,并且通过推导获得了气泡上升过程中拽力系数的计算公式.