[1]蒋展志,刘雪东,李 岩,等.底部对数螺线挡板对搅拌釜流场特性影响的数值模拟[J].常州大学学报(自然科学版),2013,(02):67-71.[doi:10.3969/j.issn.2095-0411.2013.02.017]
　JIANG Zhan zhi,LIU Xue dong,LI Yan,et al.Numerical Simulation on Effect of Flow Characteristics with Bottom Logarithmic Spiral Baffle in Stirred Tank[J].Journal of Changzhou University(Natural Science Edition),2013,(02):67-71.[doi:10.3969/j.issn.2095-0411.2013.02.017]
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底部对数螺线挡板对搅拌釜流场特性影响的数值模拟()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
期数:
2013年02期
页码:
67-71
栏目:
出版日期:
2013-03-30

文章信息/Info

Title:
Numerical Simulation on Effect of Flow Characteristics with Bottom Logarithmic Spiral Baffle in Stirred Tank
作者:
蒋展志; 刘雪东; 李 岩; 刘文明
常州大学 机械工程学院,江苏 常州 213016
Author(s):
JIANG Zhan zhi; LIU Xue dong; LI Yan; LIU Wen ming
School of Mechanical Engineering,Changzhou University,Changzhou 213016,China
关键词:
搅拌釜;  底部挡板;  速度场;  混合时间;  数值模拟
Keywords:
stirred tank;  bottom baffle;  velocity field;  mixing time;  numerical simulation
分类号:
TQ 027.1
DOI:
10.3969/j.issn.2095-0411.2013.02.017
文献标志码:
A
摘要:
采用CFD方法对底部不同结构尺寸对数螺线挡板的搅拌釜内流场特性进行了数值模拟。模拟采用多重参考系方法、滑动网格法和k-ε湍流模型。在100 r·min-1转速下,对不同结构尺寸底部挡板流场进行模拟分析。结果表明:增大底部挡板弦长与宽度有利于强化搅拌釜混合效果,缩短混合时间。底部挡板改善了叶轮区以下区域的流动状况,轴向流动与挡板弦长和宽度成正相关,与离心距离成负相关。底部挡板对将剪切速率有一定的提高,增加弦长与宽度有利于剪切水平提高。
Abstract:
Numerical simulation on the flow field characteristics in stirred tank with different structure size of bottom logarithmic spiral bafflewas conducted by computational fluid dynamics(CFD)method.Simulation was conducted by multi-reference frame method, sliding grid method and k-ε turbulent model.Under the 100 r·min-1,simulation analysis was performed on bottom baffle's flow field of different structure size.The result shows that:increasing the width and chord length of bottom baffle gives advantageto strengthening the mixing performance of stirred tank and shortening the mixing time.The bottom baffle can improve the flowing situation under impeller area,and the axial velocity has a positive correlation with width and chord length,negative correlation with distance to the center.The bottom baffle can increase shear rate to a certain degree.Increasing the chord length and width is beneficialto improving shear strength.

参考文献/References:

[1]王洪群,虞培清.搅拌设计研究[J].机械工程师,2009(9):32-34.
[2]陈登丰.搅拌器和搅拌容器的发展[J].压力容器,2008,25(2):33-46.
[3]佟立军.机械搅拌槽挡板的研究[J].有色设备,2005(3):17-19.
[4]韩君,徐春龙,王建平.基于对数螺线的发动机螺旋进气道参数化设计[J].柴油机设计与制造,2011,17(3):118-121.
[5]刘雪东,刘志炎.一种底部具有异形挡板的搅拌装置:中国,101733036A[P].2012-08-08.
[6]郭笃信,郝惠娣,魏玉梅,等.新型高效节能搅拌设备-中心龙卷流型搅拌槽[J].化学工程,2002,30(4):28-31.
[7]Alfredo I,Ruben B,Jeronimo D.Numerical investigation of the effect of impeller design parameters on the performance of a multiphase baffle-stirred reactor[J].Chemical Engineering Technology,2011,4(8):1271-1280.
[8]Liu Xuedong,Liu Zhiyan.Numerical simulation of flow field in a elliptic bottom stirred tank with bottom baffles[J].World Academy of Science,Engineering and Technology,2010,65:387-391.
[9]周国忠,王英琛,施力田.用CFD研究搅拌槽内的混合过程[J].化工学报,2003,54(7):886-890.
[10]来永斌,杨敏官.无挡板搅拌槽内固液悬浮的试验[J].江苏大学学报:自然科学版,2010,31(3):309-313.
[11]Mandar V T,Graeme L, William Y.CFD study of single phase and multiphase(liquid-liquid)pump-mixer:Analyzing design parameters,flow structures and turbulence[J].Chemical Engineering Science,2012,80(1):55-69.
[12] Szymon W,Lubomira B P,Marek O.Effect of eccentricity on transitional mixing in vessel equipped with turbine impellers[J].Chemical Engineering Researchand Design,2010,88(12):1607-1614.
[13]Montante,Giuseppina,Laurenzi,et al.Two-phase flow and bubble size distribution in air-sparged and surface-aerated vessels stirred by a dual impeller[J].Dustrial & Engineering Chemistry Research,2010,49(6):2613-2623.

备注/Memo

备注/Memo:
作者简介:蒋展志(1987-),男,湖南益阳人,硕士生; 通讯联系人:刘雪东。
更新日期/Last Update: 2013-03-30