非均匀和均匀布风流化床中颗粒的运动分析  

AN INVESTIGATION OF PARTICLE MOVEMENT IN FLUIDIZED BED WITH UNEVEN AND EVEN ARRANGEMENTS OF DISTRIBUTION AIR

作　　者：田文栋[1] 魏小林[1] 黎军[1] 吴东垠[1] 盛宏至[1] 

机构地区：[1]中国科学院力学研究所,北京100080

出　　处：《工程热物理学报》2001年第S1期161-164,共4页Journal of Engineering Thermophysics

基　　金：国家重点基础研究发展项目(No.G1999022101);国家自然科学基金资助项目(No.59776023);中国科学院重点

摘　　要：通过实验得到了非均匀布风和均匀布风流化床内示踪颗粒在床层内的运动轨迹，在此基础上，分析了流化床中示踪颗粒的混合和扩散特性。结果表明配风方式对于示踪颗粒的扩散有很大影响，内旋流流化床具有较好的横向和纵向扩散特性，有利于使流化床内横向不均匀的状况得到改善。The trajectories of trace particles in the fluidized bed with uneven or even arrangements of distribution air were obtained experimentally in this paper. The characteristics of diffusion of trace particles in fluidized bed were analyzed based on the experimental results. The arrangement patterns of air distribution had strong influences upon the diffusion of trace particles. The horizontal transportation processes of particles in the bed were improved by uneven arrangement of distribution air in internal ci...

关 键 词：非均匀布风 内旋流 流化床 扩散 

分 类 号：O359[理学—流体力学]