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.
出处
《华东理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第2期232-236,共5页
Journal of East China University of Science and Technology
关键词
搅拌设备
数值研究
滑移网格法
计算流体力学
stirred vessels
numerical investigations
sliding grid method
computational fluid (dynamics)
