气液两相流容积含气率的图像检测方法  

Image processing-based Detection Method for the Measurement of Volumetric Gas Content in a Gas-liquid Two-phase Flow

作　　者：周云龙[1] 尚秋华[1] 范振儒[1] 洪文鹏[1] 

机构地区：[1]东北电力大学能源与机械工程学院,吉林吉林132012

出　　处：《热能动力工程》2008年第5期507-511,共5页Journal of Engineering for Thermal Energy and Power

基　　金：吉林省科技发展计划基金资助项目(20040513)

摘　　要：研究开发了一种在线检测气液两相泡状流容积含气率的方法。该方法基于数字图像处理技术,采用高速摄像仪系统,对垂直上升管道中泡状流流动过程进行实时拍摄和图像采集,利用边缘检测和图像填充技术提取并计算气泡尺寸,从而计算容积含气率。对不同工况下的容积含气率进行了实时在线检测,实验结果表明:检测值与真实值比较,相对误差不超过15%,具有较高的测量精度,可以用于气液两相流参数的在线检测。A method for the on-line detection of volumetric gas content of a gas-liquid two-phase bubble flow has been studied and developed.The method in question is based on digital image processing technology,employs a high-speed video camera system to conduct a real time camera shooting and image collection of the bubble flow process in vertical risers and makes use of rim detection and image fill-in technology to extract gas bubbles and calculate their sizes,thereby calculating the volumetric gas content.A real time on-line detection and measurement have been made of the volumetric gas content under different operating conditions.Test results show that compared with real values,the detected values have a relative error not exceeding 15%.Having attained a relatively high measurement accuracy,the method under discussion can be used for the on-line detection of parameters in a gas-liquid two-phase flow.

关 键 词：气液两相流 容积含气率 图像处理 气泡 

分 类 号：O359.1[理学—流体力学]