搅拌头偏心布置对物料悬浮颗粒分散性的影响  

Effects of Eccentric Distribution of Stirrer on Dispersivity of Suspended Particles

作　　者：纪俊红[1,2] 杨继超[3] 李向龙[3] 王丽[3] 

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室,沈阳110819 [2]辽宁工程技术大学安全科学与工程学院,辽宁葫芦岛125105 [3]辽宁工程技术大学机械工程学院,辽宁阜新123000

出　　处：《南水北调与水利科技》2013年第5期74-77,107,共5页South-to-North Water Transfers and Water Science & Technology

摘　　要：用聚丙烯代替悬浮颗粒,采用数值模拟的方法对流场进行了深入研究。首先通过试验分析,取得了满意的数值模拟效果后,采用标准湍流模型对偏心搅拌流场进行模拟。然后针对不同模拟工况进行试验验证比较,分析不同的偏心程度对速度分布、湍动能大小、物料(聚丙烯)混合效果以及混合时间的影响。研究表明,偏心率为0.22左右,浸入深度在容器高度的35%时,流场分布比较均匀,死区较小,更有利于物料混合,搅拌效果最好。The polypropylene was used as suspended particle, and numeral simulation was performed to investigate the effects of different stirring styles. The model was first examined based on the CFD simulation and experiments to obtain the reasonable results, and then the k-~ unsteady model was adopted to simulate the flowing field of eccentric agitation. The simulated results were verified with the experimental results to analyze the impacts of different eccentric degrees on the velocity distribution, tur- bulence kinetic energy, and mixing effects and time of polypropylene. The results showed that the offset ratio is about 0. 22, and when the immersion depth is 35 ~ of the bottle height, the flowing field is well distributed with small ＂death zone＂, which is beneficial to the mixing of polypropylene.

关 键 词：固液分散 FLUENT模拟 偏心搅拌 浸入深度 

分 类 号：TF704.3[冶金工程—钢铁冶金]