基于图像法的稀相气/固两相流混合比及空隙率分析  

Analysis of Dilute Phase Gas-Solid Flow Mix Ratio and Void Fraction Based on Image Method

作　　者：周云龙[1] 彭颖[1] 

机构地区：[1]东北电力大学,吉林吉林132012

出　　处：《化工自动化及仪表》2013年第10期1270-1275,共6页Control and Instruments in Chemical Industry

基　　金：国家自然科学基金资助项目(51276033)

摘　　要：通过使用高速摄影系统获得稀相气/固两相流流动图像,并利用图像处理技术对获得的图像进行均匀光照、二值化及粘连颗粒分割等预处理,统计出图像中颗粒尺寸参数。利用数学公式,计算出稀相气/固两相流流混合比与空隙率的纵向分布和横向分布,以及不同截面积的混合比与空隙率分布,并对混合比与空隙率的分布进行比较分析。最终得出在稀相气/固两相流中,混合比比空隙率能更好地描述气/固两相流流动特性的结论。By using high-speed photography system to get dilute phase gas-solid flow images, and the image processing techniques like illumination,binarization and adhesion granular segmentation to preprocess the im- age ,the particle size in the image parameter was calculated;and through relevant mathematical formula, both vertical and horizontal distribution of the dilute phase gas-solid flow mixing ratio and void fraction, as well as the mixing ratio and void fraction distribution of various cross-sectional area were calculated and analyzed to show that, in the dilute phase gas-solid flow, the mixing ratio outperforms the void fraction in describing the flow characteristics of gas-solid flow, and this lays the foundation for its further study.

关 键 词：稀相气 固两相流 图像处理技术 混合比分布 空隙率分布 

分 类 号：TH89[机械工程—仪器科学与技术]