涡轮桨搅拌槽内单循环流动特性的大涡模拟

被引:9
作者
李志鹏
高正明
机构
[1] 北京化工大学化学工程学院
关键词
大涡模拟(LES); 计算流体力学(CFD); 搅拌槽; 涡轮桨;
D O I
暂无
中图分类号
TQ019 [模拟原理、相似原理及因次分析在化工中的应用];
学科分类号
0703 ;
摘要
利用大涡模拟方法研究了涡轮桨搅拌槽内的单循环流动特性,采用Smagorinsky-Lilly动力亚格子模式,与文献实验及模拟数据进行了详细的比较.结果表明,叶片后方的双尾涡偏向槽底运动,上尾涡在30o处已开始衰减.800000个非均匀分布的计算网格和30个桨叶旋转周期的样本数据统计可获得准确的大涡模拟数据.时均速度、均方根速度和湍流动能的大涡模拟值与实验数据一致,而k-ε模型的模拟值与实验不符.桨叶区呈现较强的各向异性,这是导致k-ε模型预测不准确的主要原因.对于搅拌槽内的复杂流动,大涡模拟方法是一个非常有效的工具.
引用
收藏
页码:900 / 904
页数:5
相关论文
共 12 条
[1]   涡轮桨搅拌槽内流动特性的大涡模拟 [J].
李志鹏 ;
高正明 .
高校化学工程学报, 2007, (04) :592-597
[2]  
Large Eddy Simulation of Liquid Flow in a Stirred Tank with Improved Inner-Outer Iterative Algorithm[J]. 张艳红,杨超,毛在砂.Chinese Journal of Chemical Engineering. 2006(03)
[3]   涡轮桨搅拌槽内混合过程的大涡模拟 [J].
苗一 ;
潘家祯 ;
闵健 ;
高正明 .
华东理工大学学报(自然科学版), 2006, (05) :623-628
[4]  
Large Eddy Simulations of Mixing Time in a Stirred Tank[J]. 闵健,高正明.Chinese Journal of Chemical Engineering. 2006(01)
[5]   Assessment of large eddy and RANS stirred tank simulations by means of LDA [J].
Hartmann, H ;
Derksen, JJ ;
Montavon, C ;
Pearson, J ;
Hamill, IS ;
van den Akker, HEA .
CHEMICAL ENGINEERING SCIENCE, 2004, 59 (12) :2419-2432
[6]  
Modelling of Turbulence in Stirred Vessels Using Large Eddy Simulation[J] . A. Bakker,L.M. Oshinowo.Chemical Engineering Research and Design . 2004 (9)
[7]  
Numerical Simulation of Turbulent Flow Characteristics in a Stirred Vessel Using the LES and RANS Approaches with the Sliding/Deforming Mesh Methodology[J] . S.L. Yeoh,G. Papadakis,M. Yianneskis.Chemical Engineering Research and Design . 2004 (7)
[8]   Large eddy simulation of flow in stirred vessels [J].
Revstedt, J ;
Fuchs, L .
CHEMICAL ENGINEERING & TECHNOLOGY, 2002, 25 (04) :443-446
[9]   Numerical simulations of the dependency of flow pattern on impeller clearance in stirred vessels [J].
Montante, G ;
Lee, KC ;
Brucato, A ;
Yianneskis, M .
CHEMICAL ENGINEERING SCIENCE, 2001, 56 (12) :3751-3770
[10]  
Assessment of Large Eddy Simulations for Agitated Flows[J] . J. Derksen.Chemical Engineering Research and Design . 2001 (8)