文献类型：期刊文献

中文题名：搅拌设备内流场的数值研究

英文题名：Numerical Investigations of Flow Fields in Baffled Stirred Vessels

作者：孙会[1];潘家祯[1]

机构：[1]华东理工大学机械与动力工程学院,上海200237

年份：2005

卷号：31

期号：2

起止页码：232

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;EI(收录号：2005209110099);Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：搅拌设备;数值研究;滑移网格法;计算流体力学

外文关键词：stirred vessels; numerical investigations; sliding grid method; computational fluid (dynamics)

摘要：利用滑移网格法计算了六直叶Rushton涡轮搅拌设备内的流场。考察了计算流体力学(CFD)模拟搅拌设备流场的预测能力,分析了搅拌桨叶端及附近区域的流动行为。结果表明:CFD计算的时均速度与实验结果一致,CFD技术与实验手段可相互补充;搅拌桨叶片端部的速度分布并非关于叶片高度的中心位置严格对称,搅拌设备的流场结构并非完全由搅拌桨的行为决定;六直叶Rushton涡轮叶端附近区域最大径向速度点与最大切向速度点不在同一个位置,径向速度在叶端附近区域有一个流动发展的过程。
Sliding grid method was used to calculate the flow fields in baffled stirred vessel agitated by a six-blade Rushton turbine. The prediction capabilities of computational fluid dynamics (CFD) used for simulation of flow fields in stirred vessels were assessed, and flow behavior at blade tip and the vicinity of blade was analyzed. Results show that the predicted mean velocity is in good agreement with the experimental data. CFD technique and experiment methods can be supplement each other. The velocity distributions at blade tip are not strictly symmetric about the center along blade height, which means agitator is not the only factor that may influence the flow fields in stirred vessel. At the vicinity of Rushton turbine blades, the position where maximal radial velocity occurs is not the same as that of maximal tangential velocity, and the radial velocity gradually arrives at the maximum as the radial distance from blade tip increases.