PIV技术应用于循环流化床颗粒运动测试  

PIV Measurement of Particles Movement in A Circulating Fluidized Bed

作　　者：石惠娴[1] 

机构地区：[1]同济大学,上海200092

出　　处：《化学反应工程与工艺》2004年第4期294-299,共6页Chemical Reaction Engineering and Technology

基　　金：国家重点基础发展规划项目(G1999022105)

摘　　要：粒子图像测速(PIV)技术被尝试用于测量循环流化床内颗粒运动,运用二值化互相关图像处理算法,得出了流场中粒子的轴向速度及水平方向速度分布图,并分析了粒子运动的变化规律。测试结果较好地反映了循环流化床内颗粒流动的一些特性,表明PIV技术在循环流化床气固两相流体特性研究中具有较好的应用前景。As an accurate measurement technique on whole instantaneous fields, PIV (particle image velocimetry) was applied to measure the gas-solid flow behavior for a better understanding of the complex hydrodynamics in circulating fluidized bed. The experiment was carried out in a circulating fluidized bed of 4 m in height and 200mm × 200mm in cross-section. Velocities of the transported particles were calculated by the binary cross-correlation method in image processing, and the velocity vector figures of particles were obtained at different sections in the circulating fluidized bed. The experimental results reflected some hydrodynamics of gas-solid flow in circulating fluidized bed and showed a good prospect about PIV application to circulating fluidized bed.

关 键 词：气固两相流 粒子图像测速技术 循环流化床 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]