全挡板条件下挡板数目对搅拌式反应罐内部流场的影响  

Influence of different numbers of baffles on the flow field in a stirred tank under full-baffle condition

作　　者：刘青[1] 田强[2] 

机构地区：[1]山东科技大学机械电子工程学院,山东青岛266590 [2]中国石油化工股份有限公司济南分公司,山东济南250101

出　　处：《应用科技》2014年第4期56-60,共5页Applied Science and Technology

摘　　要：采用多相流模型和滑移网格法,应用CFD软件,研究了在全挡板条件下不同数目挡板的搅拌式反应罐内部的流体动力学特性。为研究挡板数目对搅拌式反应罐内物料流动规律的影响,文中对搅拌桨旋转40周时的数值模拟结果进行了比较,分析了不安装挡板、安装4块挡板和安装6块符合全挡板条件挡板的搅拌式反应罐在内部流场、流速、气液两相的分布状态以及搅拌轴输出扭矩等方面的差异,模拟结果表明,挡板能有效消除罐内流体漩涡、增强湍动作用、加强罐内物料的搅拌混合特性;安装4块符合全挡板条件的挡板能很好地满足各方面要求。This paper studies the fluid dynamics characteristic in the stirred tank with different number of baffles in the full-baffle condition , by using general multiphase model , sliding mesh method , and the CFD software .In order to study the effects of different numbers of baffles on the flowing law of the internal materials , the numerical simula-tion results after 40 rotations of stirring blades are compared , and the differences in the internal flow field , flow ve-locity, distribution of gas-liquid phases as well as torque output of stirring shaft , in non-baffle stirred tank and stirred tanks with four and six baffles in full-baffle condition , are summarized .The conclusions are drawn as fol-lows：baffles can effectively eliminate vortex , enhance turbulent effects and mixing characteristics of internal mate-rials.And four baffles under full-baffle condition can best meet all requirements .

关 键 词：搅拌 反应罐 挡板 CFD 全挡板条件 数值模拟 多相流 滑移网格 

分 类 号：TH113[机械工程—机械设计及理论] TQ052.4[化学工程]