不同颗粒物性对异径混合非球形颗粒分离特性影响的数值模拟  

Effects of Particle Properties on Separation Behavior of Differently-sized Non-spherical Particle Mixtures

作　　者：陶贺[1] 钟文琪[2] 张勇[2] 杨品[1] 

机构地区：[1]郑州航空工业管理学院土木建筑工程学院,郑州450000 [2]东南大学能源与环境学院,南京210096

出　　处：《动力工程学报》2015年第8期652-658,共7页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(51406186);河南省科技厅科技攻关资助项目(142102210577)

摘　　要：采用多元颗粒模型描述了3种非球形颗粒,即玉米形颗粒、椭球形颗粒和圆柱形颗粒,分析了其碰撞机理,建立了非球形颗粒的运动方程,通过实验验证了模型的可靠性,并研究了不同颗粒物性对异径混合颗粒分离特性的影响.结果表明:不同形状颗粒的分离特性有很大不同,其中椭球形颗粒的分离程度最大,球形颗粒的分离程度最小,且分离程度随着颗粒直径比的增大而增大,而颗粒密度比对颗粒的分离情况基本没有影响.Multi-element particle model was used to describe three kin ding the corn-shaped particle, ellipsoidal particle and cylindrical partie sion mechanism, set up motion equations, verify the model reliability of non-spherical particles, incluetc. , so as to analyze their collirough experimental tests, and to study the effects of particle properties on separation behavior of the differently-sized non-spherical particle mixtures. Results show that great difference of separation exists among differently-shaped particles. The segregation extent of ellipsoidal particles is the largest, and that of spherical particles is the smallest, which increases significantly with the diameter ratio. However, the density ratio affects little on the separation behavior of non-spherical particle mixtures.

关 键 词：气固两相流动 异径混合非球形颗粒 分离特性 数值模拟 

分 类 号：TK224[动力工程及工程热物理—动力机械及工程]