基于光纤内窥镜和高速摄影联用测量喷动床颗粒速度研究  

Measurement of Particle Velocity in Spouted Bed Based on the Combination of Fiberscope and High-Speed Photography

作　　者：陈曦[1] 钟文琪[1] 陆勇[1] 陈瑜[1] 任冰[1] 金保昇[1] 

机构地区：[1]东南大学能源与环境学院,江苏南京210096

出　　处：《工程热物理学报》2013年第2期278-281,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.50976025);国家重点基础研究发展计划(973计划)(No.2010CB732206)

摘　　要：喷动床中颗粒速度的大小与喷动床内颗粒停留时间、固体混合、传热传质特性和磨损行为有着极为密切的关系。喷动床中稠密颗粒速度的测量一直是一个难点。本文探索了一种测量喷动床中颗粒速度的新方法,将光纤内窥镜深入喷动床内部,使用与之相连的高速摄影仪拍摄。将内窥镜传回的图像逐帧分析,捕捉颗粒在内窥镜视野中的轨迹,并记录下相应的时间,就可以得到颗粒的速度。通过解决尺寸标定,畸变矫正,图像处理和运动分析等问题,获得了喷动床内部喷动区典型的速度分布。Particle velocity is closely related with particle residence time, particle mixing, heat transfer, mass transfer and wear behavior in spouted bed. Measurement of particle velocity is a very important aspect in gas-solid flow measurement. A novel solution combining fiberscope and high-speed photography was developed. A fiberscope was inserted into spouted bed and the images captured by the fiberscope was recorded by a high-speed video camera. The particle velocity then can be determined through analyzing the video frames. During the experiment, a typical particle velocity profile in spouted bed was acquired.

关 键 词：光纤内窥镜 高速摄影仪 颗粒速度测量 畸变矫正 边缘识别 

分 类 号：TB663[一般工业技术—制冷工程]