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T型搅拌器数值模拟研究
引用本文:牟 童,郑 源,郑建坤,毛秀丽,张 新,朱延涛.T型搅拌器数值模拟研究[J].南水北调与水利科技,2014,12(3):89-94.
作者姓名:牟 童  郑 源  郑建坤  毛秀丽  张 新  朱延涛
作者单位:1.河海大学能源与电气学院,江苏 南京 211100;2.河海大学水利水电学院,江苏 南京 211100
摘    要:针对一种新型T型搅拌器,采用计算流体动力学(CFD)软件FLUENT,利用多重参考系法(MRF)对其的流场进行数值模拟:首先分析对比了T型搅拌器与开启式涡轮搅拌器和圆盘涡轮式搅拌器的湍流强度、搅拌槽内流场特性、时均速度分布和搅拌功率,结果表明T型搅拌器的流场分布较好,能够达到更好的混合效果;通过分析T型搅拌器在不同安装高度下的搅拌特性,确定了指定搅拌槽尺寸情况下最佳安装高度为150mm;最后计算了不同叶片数T型搅拌器的湍流强度分布和搅拌功率,得知槽内搅拌功率随着叶片数的增加而增大,3叶片数的T型搅拌器具有最优的湍流强度分布。本研究对分析和开发类似新型搅拌器有重要的参考意义。

关 键 词:T型搅拌器  数值模拟  流场特性  搅拌功率

Numerical Simulation of T-shaped Stirrer
MOU Tong,ZHENG Yuan,ZHENG Jian-kun,MAO Xiu-li,ZHANG Xin,ZHU Yan-tao.Numerical Simulation of T-shaped Stirrer[J].South-to-North Water Transfers and Water Science & Technology,2014,12(3):89-94.
Authors:MOU Tong  ZHENG Yuan  ZHENG Jian-kun  MAO Xiu-li  ZHANG Xin  ZHU Yan-tao
Affiliation:1. College of Energy and Electrical Engineering of Hohai University, Nanjing 211100, China; 2. College of Energy and Electrical Engineering of Hohai University, Nanjing 211100, China
Abstract:The flow field of a new T-shaped stirrer was simulated using the multiple reference frame (MRF) method in the computational fluid dynamics (CFD) software FLUENT. The intensity of turbulence, flow field characteristics, mean velocity distribution, and mixing power of the T-shaped stirrer, open turbine stirrer, and rushton turbine stirrer were analyzed and compared, and the results suggested that the T-shaped stirrer has a better flow field distribution to achieve better mixing effects. The mixing characteristics of T-shaped stirrer with different mounting heights were analyzed, and the best mounting height was obtained as 150mm under the condition of fixed stirred tank size. The turbulence intensity and mixing power of the T-shaped stirrer with different numbers of blades were investigated, which showed that the mixing power increases with the increasing number of blades and the T-shaped stirrer with 3 blades has the best turbulence intensity distribution. The research can provide an important basis for the analysis and development of new stirrer.
Keywords:T-shaped stirrer  numerical simulation  flow field characteristics  mixing power
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