刚柔组合搅拌桨与刚性桨调控流场结构的对比

doi:10.3969/j.issn.0438-1157.2014.06.018

化工学报 ›› 2014, Vol. 65 ›› Issue (6): 2078-2084.DOI: 10.3969/j.issn.0438-1157.2014.06.018

刚柔组合搅拌桨与刚性桨调控流场结构的对比

刘作华^1,2, 曾启琴¹, 杨鲜艳¹, 刘仁龙¹, 王运东², 陶长元¹

1. 重庆大学化学化工学院, 重庆 400044;
2. 清华大学化学工程系, 北京 100084

收稿日期:2013-09-04 修回日期:2014-01-06 出版日期:2014-06-05 发布日期:2014-06-05
通讯作者: 刘作华
作者简介:刘作华（1973- ），男，教授。
基金资助:
国家重点基础研究发展计划项目（2012CBA01203）；清华大学化学工程联合国家重点实验室开放课题（SKL-ChE-12A02）；中央高校基本科研业务费跨学科类重大项目（CDJZR12228801）；重庆市自然科学基金重点项目（CSTC2012JJB0006）。

Flow field structure with rigid-flexible impeller and rigid impeller

LIU Zuohua^1,2, ZENG Qiqin¹, YANG Xianyan¹, LIU Renlong¹, WANG Yundong², TAO Changyuan¹

1. School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China;
2. Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

Received:2013-09-04 Revised:2014-01-06 Online:2014-06-05 Published:2014-06-05
Supported by:
supported by the National Basic Research Program of China (2012CBA01203), the State Key Laboratory of Chemical Engineering (SKL-ChE-12A02), the Interdisciplinary Class Major Projects of Central Universities (CDJZR12228801) and the Key Natural Science Fund of Chongqing (CSTC2012JJB0006).

摘要/Abstract

摘要： 高黏度流体处于层流状态时，普遍存在的混合隔离区，降低了流体的混合效率。减小或消除隔离区，是实现流体高效混合的基本途径。采用实验研究与数值模拟相结合的方法，对刚性六直叶涡轮桨（刚性桨）和刚柔组合六直叶涡轮桨（组合桨）的流场结构进行研究，对比分析了两种桨叶在相同功耗（3 kW·m^-3）时的轴向、径向和切向的速度矢量图、速度云图以及速度分布散点图。结果表明，刚性桨的能量集中在桨叶尖端部分，远离桨叶区域的流体速度很小甚至为0 m·s^-1；而组合桨可将能量从桨叶尖端扩散至全槽，使槽内流体均具有一定的流速，提高了混合效率，且显色实验与数值模拟结果一致，组合桨体系的混合隔离区在短时间内就可消除，混合良好，而刚性桨体系的混合隔离区始终存在，混合效果不佳。

关键词: 混合, 混沌, 搅拌槽, 刚柔组合桨, 数值模拟

Abstract: Isolated mixing region often appears in the high-viscosity fluid with laminar flow in a stirred vessel, reducing fluid mixing efficiency. Diminishing or eliminating isolated mixing region improves the mixing efficiency and reduces mixing energy consumption. Experimental and computational studies were carried out to compare the flow field structures with rigid Rushton turbine impeller (rigid RT impeller) and rigid-flexible Rushton turbine impeller (combination RT impeller). Analyses were carried out on axial, radial and tangential velocity vector plots, velocity contours and velocity distribution scatter plots at the same time power consumption (3 kW·m^-3）with these two impellers. Results show that the energy concentrates at the tip of rigid RT impeller and the fluid velocity away from the impeller is small, even at 0 m·s^-1, while for combination RT impeller, the energy distributes well in the stirred tank so that the fluid gains certain velocity everywhere. The numerical simulation results agree with experimental results. The combination RT impeller improves mixing efficiency by eliminating isolated mixing regions, while rigid RT impeller presents a poor mixing efficiency since isolated mixing regions always exist.

Key words: mixing, chaos, stirred vessel, rigid-flexible impeller, numerical simulation

中图分类号:

TQ027.2

刘作华, 曾启琴, 杨鲜艳, 刘仁龙, 王运东, 陶长元. 刚柔组合搅拌桨与刚性桨调控流场结构的对比[J]. 化工学报, 2014, 65(6): 2078-2084.

LIU Zuohua, ZENG Qiqin, YANG Xianyan, LIU Renlong, WANG Yundong, TAO Changyuan. Flow field structure with rigid-flexible impeller and rigid impeller[J]. CIESC Journal, 2014, 65(6): 2078-2084.

参考文献 28

[1]	Chen Zhiping (陈志平), Zhang Xuwen (章序文), Lin Xinghua (林兴华). Handbook of Stirring and Mixing Equipment Design Selection (搅拌与混合设备设计选用手册) [M]. Beijing: Chemical Industry Press, 2004
[2]	FanYurun (范毓润), Lu Zhumin (卢著敏). Periodic and aperiodic chaotic mixing between eccentric cylinders [J]. Journal of Chemical Industry and Engineering (China) (化工学报), 2002, 53 (6): 660-663
[3]	Rao Qi (饶麒), Fan Jianhua (樊建华), Wang Yundong (王运东), Fei Weiyang (费维扬). DPIV measurement and CFD simmulation of viscous fluid flow in stirred tank agitated by Rushton turbine [J]. Journal of Chemical Industry and Engineering (China) (化工学报), 2004, 55 (8): 1374-1379
[4]	Yang W, Wang Y, Chen J, Fei W. Computational fluid dynamic simulation of fluid flow in a rotating packed bed [J].Chemical Engineering Journal, 2010, 156: 582-587
[5]	David P, Liu Z, Franco M. Analysis of KLa measurement methods in stirred vessels: the role of experimental techniques and fluid dynamic models [J]. International Journal of Chemical Reactor Engineering, 2010, 8 (1): 1-38
[6]	Hu Yinyu (胡银玉), Liu Zhe (刘喆), Yang Jichu (杨基础), Cheng Yi (程易). Liquid mixing in eccentric stirred tank [J]. CIESC Journal (化工学报), 2010, 61 (10): 2517-2522.
[7]	Yang Fengling (杨锋苓), Zhou Shenjie (周慎杰), Zhang Cuixun (张翠勋). Recent development of chaotic mixing of stirred tank [J]. Chemical Industry and Engineering Progress (化工进展), 2008, 27 (10): 1538-1543
[8]	Yianneskis M, PoPiolek Z, Whitelaw J H. An experimental study of the steady and unsteady flow characteristic of stirred reaetors [J]. Journal of Fluid Mechanics, 1987, 175: 537-555
[9]	Costes J, Coudere J P. Study by laser Doppler anernometry of the turbulent flow induced by a Rushton turbine in a stirred tank: influence of the size of the units (1): Mean flow and turbulence [J]. Chemical Engineering Science, 1988, 43 (10): 2751-2764
[10]	Shi Litian (施力田), Gao Zhengming (高正明), Min Jian (闵健). Large eddy simulation for mixing time in stirred tank with dual Rushton turbines [J]. CIESC Journal (化工学报), 2010, 61 (7): 1747-1752
[11]	Yek W M, Noui-Mehidi M N,Parthasarathy R, Bhattacharya S N, Wu J, Ohmura N, Nishioka N. Enhanced mixing of Newtonian fluids in a stirred vessel using impeller speed modulation [J]. Canadian Journal of Chemical Engineering, 2009, 87 (6): 839-846
[12]	Yang Yiwei (杨弋纬), Wang Jiajun (王嘉骏), Gu Xueping (顾雪萍), Feng Lianfang (冯连芳). The application of chaotic mixing in polymer blending [J]. Polymer Materials Science and Engineering (高分子材料科学与工程), 2012, 28 (3): 186-189
[13]	Lamberto D J, Alvarez M M, Muzzio F J. Experimental and computional investigation of the laminar flow structure in a stirred tank [J]. Chemical Engineering Science, 1999, 54: 919-942
[14]	Peter R, Dirk W B. New miniature stirred-tank bioreactors for parallel study of enzymatic biomass hydrolysis [J]. Bioresource Technology, 2012, 106: 138-146
[15]	Somnath R, Sumanta A. Scalar mixing in a turbulent stirred tank with pitched blade turbine: role of impeller speed perturbation[J]. Chemical Engineering Research and Design, 2012, 90(7):884-898
[16]	Andre C, Demeyre J F, Gatumel C, Berthiaux H, Delaplace G. Dimensional analysis of a planetary mixer for homogenizing of free flowing powders: mixing time and power consumption [J]. Chemical Engineering Journal, 2012, 198/199: 371-378
[17]	Yang Fengling (杨锋苓), Zhou Shenjie (周慎杰), Wang Guichao (王贵超). Detached eddy simulation of the macro-instability in eccentrically stirred tanks [J]. Journal of Chemical Engineering of Chinese Universities (高校化学工程学报), 2012, 2 (6): 228-234
[18]	Kato Y, Tada Y, Takeda Y, Nagatsu Y, Iwata S, Iwaishi S, Kajihara S, Lee Y, Koh S. Effects of unsteady mixing in turbulent agitated vessel [J]. Kagaku Kogaku Ronbunshu, 2009, 35, 152-157
[19]	Szymon W, Lukasz J. Effect of eccentricity on laminar mixing in vessel stirred bydouble turbine impellers [J]. Chemical Engineering Research and Design, 2011, 89 (11): 2268-2278
[20]	Liu Zuohua (刘作华), Ning Weizheng (宁伟征), Sun Ruixiang (孙瑞祥), Zhou Xiaoxia (周小霞), Tao Changyuan (陶长元). Fractal flow structure in air jet-stirred reactor with double impeller [J]. CIESC Journal (化工学报), 2011, 62 (3): 628-635
[21]	Liu Zuohua (刘作华), Yang Xianyan (杨鲜艳), Xie Zhaoming (谢昭明), Liu Renlong (刘仁龙), Tao Changyuan (陶长元), Wang Yundong (王运东). Chaotic mixing performance of high-viscosity fluid synergistically intensified by flexible impeller and floating particles [J]. CIESC Journal (化工学报), 2013, 64 (8): 2794-2800
[22]	Liu Fangfang (刘芳芳), Yang Canjun (杨灿军), Su Qi (苏琦), Wang Donghai (王东海), Zhang Yizhong (张译中). Simulation analysis and experimental research on the movements of biomimetic fin [J]. Journal of Mechanical Engineering (机械工程学报), 2010, 46 (19): 24-29
[23]	Ren Luquan (任露泉), Liang Yunhong (梁云虹). Coupling Bionics (耦合仿生学) [M]. Beijing:Science Press,2012
[24]	Zhang Yonghua (章永华). Theoretic and experimental research on propulsion flexible biomimetic undulatory robotic fin [D]. Hefei: University of Science and Technology of China, 2008
[25]	Liu Wangyu (刘旺玉), Zhang Xin (张鑫), Liu Xifeng (刘希凤), Gong Jiaxing (龚佳兴). Bionic design and performance study for flexible blades of wind turbine [J]. Journal of Machine Design (机械设计), 2010, 27 (5): 7-10
[26]	Campbell R L, Paterson E G. Fluid-structure interaction analysis of flexible turbomachinery [J]. Journal of Fluids and Structures, 2011, 27(8): 1376-1391
[27]	Liu Zuohua (刘作华), Zeng Qiqin (曾启琴), Wang Yundong (王运东), Sun Ruixiang (孙瑞祥), Ning Weizheng (宁伟征), Tao Changyuan (陶长元). Study on laminar mixing enhanced by flexible impeller in high-viscosity fluid stirred tank [J]. China Science Paper (中国科技论文), 2012, 7 (3): 185-189
[28]	Juan M P, Amelia C R, Susana E Z. Mathematical modeling of the heat transfer and flow field of liquid refrigerants in a hydro fluidization system with a stationary sphere [J]. Journal of Food Engineering, 2010, 99: 3303-3313

刚柔组合搅拌桨与刚性桨调控流场结构的对比

Flow field structure with rigid-flexible impeller and rigid impeller

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