六弯叶搅拌槽内假塑性流体流场及洞穴变化的数值模拟

›› 2010, Vol. 10 ›› Issue (6): 1054-1059.

六弯叶搅拌槽内假塑性流体流场及洞穴变化的数值模拟

栾德玉周慎杰陈颂英楚树坡

青岛科技大学机电工程学院山东大学机械工程学院过控教研室山东大学机械工程学院过控教研室山东省济南市山东大学机械工程学院

收稿日期:2010-10-20 修回日期:2010-12-08 出版日期:2010-12-20 发布日期:2010-12-20
通讯作者: 栾德玉

CFD Simulation of the Flow Field and Cavern Formation of Pseudoplastic Fluid with a 6-blended-blade Impeller

LUAN De-yu ZHOU Shen-jie, CHEN Song-ying CHU Shu-po

School of Mechanical Engineering，Qingdao University of Science and Technology School of Mechanical Engineering，Shandong University School of Mechanical Engineering，Shandong University School of Mechanical Engineering,Shandong University

Received:2010-10-20 Revised:2010-12-08 Online:2010-12-20 Published:2010-12-20
Contact: LUAN De-yu

摘要/Abstract

摘要： 利用计算流体力学的方法，对六弯叶搅拌器在黄原胶水溶液(一种具有屈服应力的假塑性流体)中的流场及洞穴变化进行研究，得到了搅拌器的功率准数、流动准数、泵送效率以及洞穴大小随雷诺数的变化情况. 结果表明，层流状态下，功率准数与雷诺数成反比，流动准数和泵送效率随雷诺数增加而增大，随流体粘度增加而降低，采用Herschel-Bulkley流变模型模拟的洞穴形状为圆柱形. Dc

关键词: 假塑性流体, 洞穴, 六弯叶搅拌器, 屈服应力, 层流模型

Abstract: Computational fluid dynamics method was applied to study the 3D flow field and cavern formation in the agitation of xanthan gum, a pseudoplastic fluid with yield stress, with a 6-bent-blades impeller. The power number, flow number, pumping efficiency and cavern size as a function of Reynolds number were examined, respectively. The results show that in the laminar regime, the power number was inversely proportional to Reynolds number, and flow number and pumping efficiency increased as Reynolds number increased, but they decreased as the mass concentration of solution increased. The cavern simulated by Herschel-Bulkley model was cylinder in shape. The predicted size of cavern was in good agreement with that calculated using Elson's model at Dc

Key words: pseudoplastic fluid, avern, 6-bent-blade impeller, yield stress, laminar model

栾德玉周慎杰陈颂英楚树坡. 六弯叶搅拌槽内假塑性流体流场及洞穴变化的数值模拟[J]. , 2010, 10(6): 1054-1059.

LUAN De-yu ZHOU Shen-jie; CHEN Song-ying CHU Shu-po. CFD Simulation of the Flow Field and Cavern Formation of Pseudoplastic Fluid with a 6-blended-blade Impeller[J]. , 2010, 10(6): 1054-1059.