化学工程2012，Vol.40Issue(7)：52-56,5.DOI:10.3969/j.issn.1005-9954.2012.07.013
流体流变性对错位六弯叶桨流场特性的影响
Influence of fluid rheology on flow field features stirred by impeller of perturbed six-bent-bladed turbine
栾德玉 1周慎杰 2陈颂英2
作者信息
- 1. 青岛科技大学机电工程学院,山东青岛266061
- 2. 山东大学机械工程学院,山东济南 250061
- 折叠
摘要
Abstract
The laminar flow field stirred by impeller of perturbed six-bent-bladed turbine (6PBT) in a cylindrical vessel was studied by means of computational fluid dynamics (CFD), with highly viscous Newtonian fluid and pseudoplastic non-Newtonian fluid as research object. Hie results show that the numerical calculated value of power consumption in glycerine is in good agreements with that of the experimental measurement. For pseudoplastic Quids, the value of Reynolds number has a major influence on the normalized velocity and shear rate, and the proper increasing speed would be a better way for improving the distribution of velocity field and shear rate. The rheological properties of fluids have obvious influences on the normalized velocity, but minor influences on shear rate specially; there is no correlation between the rheological index and shear rate when n <0. 3. With the flow development from the laminar flow to the transitional flow regime, the flow number and pumping efficiency of 6PBT impeller increase considerably. Moreover, the pumping efficiency of the impeller decreases obviously as the rheological index of pseudoplastic fluids reduces. The research results promote the understanding of the stirring performance of the 6PBT impeller in the different fluids and provide valuable instructions and references for the design, application and development of new type impeller in highly viscous fluids.关键词
错位六弯叶搅拌器/假塑性流体/流变指数/泵送效率/剪切速率Key words
impeller of perturbed six-bent-bladed turbine (6PBT)/ pseudoplastic fluids/ rheological index/ pumping efficiency/ shear rate
分类
化学化工引用本文复制引用
栾德玉,周慎杰,陈颂英..流体流变性对错位六弯叶桨流场特性的影响[J].化学工程,2012,40(7):52-56,5.
