双层刚柔组合搅拌桨调控流体宏观不稳定性行为

doi:10.11949/j.issn.0438-1157.20141058

化工学报 ›› 2015, Vol. 66 ›› Issue (3): 896-904.DOI: 10.11949/j.issn.0438-1157.20141058

双层刚柔组合搅拌桨调控流体宏观不稳定性行为

朱俊¹, 刘作华^1,2, 郑雄攀¹, 陈超¹, 王运东²

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:2014-07-14 修回日期:2014-11-05 出版日期:2015-03-05 发布日期:2015-03-05
通讯作者: 刘作华
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);重庆市自然科学基金重点项目(CSTC2012JJB0006)。

Macro-instability regulated by double rigid-flexible combination impeller

ZHU Jun¹, LIU Zuohua^1,2, ZHENG Xiongpan¹, CHEN Chao¹, WANG Yundong²

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

Received:2014-07-14 Revised:2014-11-05 Online:2015-03-05 Published:2015-03-05
Supported by:
supported by the National Basic Research Program of China (2012CBA01203), the State Key Laboratory of Chemical Engineering (SKL-ChE-12A02) and the Key Natural Science Fund of Chongqing (CSTC2012JJB0006).

摘要/Abstract

摘要：

流体宏观不稳定性是搅拌槽内流体流动存在大尺度低频非稳态准周期现象,可以影响流体的能量﹑质量的传递行为。为揭示在双层组合桨作用下搅拌槽内流体的非稳态流动规律,实验采用频谱分析和流场可视化技术研究双层组合桨搅拌槽内自来水体系的宏观不稳定性,对比分析了双层刚性桨和双层组合桨对流体混合的影响。结果表明:直径为T的搅拌槽内流体宏观不稳定频率与转速呈线性增大趋势,在转速为180 r·min^-1时离底距离 0.25T刚柔组合桨体系的宏观不稳定性频率消失,出现谱带现象,流场呈现多尺度结构特征,而离底距离为0.33T和0.5T的刚柔组合桨体系的宏观不稳定性频率分别为0.5096 Hz和0.3459 Hz。双层组合桨体系分别使流体的混合时间缩短了22.5%和35%左右,减小离底距离,可使流场的规则区减小。双层刚柔组合桨调控流体宏观不稳定性,强化流体的能量传递行为,从而缩短混合时间,提高了流体的混合效率。

关键词: 混合, 搅拌容器, 传递, 宏观不稳定性, 流场可视化, 双层刚柔组合桨

Abstract:

Fluid macro-instability is a large scale low frequency transient quasi-periodic phenomenon existing in stirred vessel, and affects fluid energy and mass transfer behavior. To reveal the nature of unsteady flow in a stirred vessel with double rigid-flexible impeller, tap water was used as working fluid, and wavelet analysis and flow field visualization were adopted to analyze the influence of double rigid-flexible impeller on the frequency of macro-instability. The difference between double rigid and double rigid-flexible impellers was analyzed in terms of mixing performance. The frequency of macro-instability increased linearly with agitation speed. At agitation speed 180 r·min^-1, macro-instability frequency values of rigid-flexible impeller were 0.5096 Hz and 0.3459 Hz with off-bottom clearance 0.33T and 0.5T, respectively. Compared with double rigid impeller system, mixing time was shortened by about 22.5% and 35%, respectively. But macro-instability with off-bottom clearance 0.25T disappeared and bands phenomenon appeared. Shortening the off-bottom clearance could reduce the regular area. Double rigid-flexible combination impeller regulated fluid macro-instability and strengthened energy transfer behavior, so as to shorten mixing time and improve mixing efficiency of the fluid.

Key words: mixing, stirred vessel, transfer, macro-instability, flow field visualization, double rigid-flexible impeller

中图分类号:

TQ027.2

朱俊, 刘作华, 郑雄攀, 陈超, 王运东. 双层刚柔组合搅拌桨调控流体宏观不稳定性行为[J]. 化工学报, 2015, 66(3): 896-904.

ZHU Jun, LIU Zuohua, ZHENG Xiongpan, CHEN Chao, WANG Yundong. Macro-instability regulated by double rigid-flexible combination impeller[J]. CIESC Journal, 2015, 66(3): 896-904.

参考文献 22

[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]	Yu Fei (于飞), Bao Yuyun (包雨云), Huang Xiongbin (黄雄斌). Agitating power demand and mixing performance of non-Newtonian fluid with slip behavior in a stirred tank [J]. Journal of Chemical Engineering of Chinese Universities (高校化学工程学报), 2009, 23 (5): 878-884
[3]	Bresler L, Shinbrot T, Metcalfe G. Isolated mixing regions: origin, robustness and control [J]. Chemical Engineering Science, 1997, 52 (10): 1623-1636
[4]	Paul E L, Atiemo-Obeng V A, Kreste S M. Handbook of Industrial Mixing: Science and Practice [M]. Hoboken: John Wiley & Sons Inc., 2004: 89-143
[5]	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
[6]	Gao Dianrong (高殿荣), Guo Mingjie (郭明杰), Li Yan (李岩), Fan Zhuoli (范卓立). PIV research on unsteady rotational speed chaotic mixing [J]. Chinese Journal of Mechanical Engineering (机械工程学报), 2006, 42 (8): 44-48
[7]	Hasal P, Montes J L, Boisson H C, Fort I. Macro-instabilities of velocity field in stirred reactor: detection and analysis [J]. Chemical Engineering Science, 2000, 55 (2): 391-401
[8]	Winardi S, Nagase Y. Unstable phenomenon of flow in a mixing reactor with a marine propeller [J]. Journal of Chemical Engineering of Japan, 1991, 24 (2): 243-249
[9]	Hamm S, Brodly R S, Fasano B. Local heat transfer in a mixing reactor using the heat sensors [J]. Ind. Eng. Chem. Res., 1992, 31: 1384-1391
[10]	Sharp K V, Adrian R J. PIV study of small-scale flow structure around a Rushton turbine [J]. AIChE J., 2001, 47 (4): 766-778
[11]	Fan Jianhua (樊建华), Rao Qi (饶麒), Wang Yundong (王运东), Fei Weiyang (费维扬). Spectral analysis of the velocity fluctuations in a mechanically stirred tank [J]. Journal of Chemical Engineering of Chinese Universities (高校化学工程学报), 2004, 18 (3): 287-292
[12]	Nomura T, Uchida T, Takahashi K. Enhancement of mixing by unsteady agitation of an impeller in an agitated vessel [J]. Journal of Chemical Engineering of Japan, 1997, 30: 875-879
[13]	Bruha O, Fort I, Smolka P. Large scale unsteady phenomena in a mixing vessel [J]. Acta Polotechnica: Czech Tech. Univ. Prague, 1993, 27 (6): 27-33
[14]	Paglianti Alessandro, Liu Zuohua, Montante Giuseppina, Magelli Franco. Effect of macro-instabilities in single- and multiple- impeller stirred tanks [J]. Ind. Eng. Chem. Res., 2008, 47 (14): 4944-4952
[15]	Kresta S M, Wood P E. The flow field produced by a pitched blade turbine: characterization of the turbulence and estimation of the dissipation rate [J]. Chem. Eng. Sci., 1993, 48 (10): 1761-1774
[16]	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
[17]	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 (China) (化工学报), 2011, 62 (3): 628-635
[18]	Liu Zuohua (刘作华), Sun Ruixiang (孙瑞祥), Tao Changyuan (陶长元), Ning Weizheng (宁伟征), Peng Hao (彭浩), Zhou Xiaoxia (周小霞), Liu Renlong (刘仁龙), Du Jun (杜军), Fan Xing (范兴), Mou Tianming (牟天明), Sun Dagui (孙大贵), Zuo Zhaohong (左赵宏), Zeng Qiqin (曾启琴), Liao Jun (廖军). A combined type stirring paddle to improve the leaching rate of manganese metal electrolyte [P]: ZL, 201110088762.8. 2012-10-10
[19]	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): 2795-2800
[20]	Liu Zuohua (刘作华), Tang Qiao (唐巧), Wang Yundong (王运东), Sun Ruixiang (孙瑞祥), Zheng Xiongpan (郑雄攀), Tao Changyuan (陶长元). Enhancement of macro-instability in a mixer-settler with rigid-flexible impeller [J]. CIESC Journal (化工学报), 2014, 65 (1): 78-86
[21]	Liu Zuohua (刘作华), Chen Chao (陈超), Liu Renlong (刘仁龙), Tao Changyuan ( 陶长元), Wang Yundong (王运东). Enhancement of macro-instability in stirred vessel with rigid-flexible combination impeller [J]. CIESC Journal (化工学报), 2014, 65 (1): 61-70
[22]	Liu Zuohua, Zheng Xiongpan, Liu Di, Wang Yundong, Tao Changyuan. Enhancement of liquid-liquid mixing in a mixer-settler by a double rigid-flexible combination impeller [J]. Chem. Eng. Process: Process Intensification, 2014, 86: 69-77

双层刚柔组合搅拌桨调控流体宏观不稳定性行为

Macro-instability regulated by double rigid-flexible combination impeller

PDF (PC)

可视化

被引次数

摘要/Abstract

引用本文

使用本文

参考文献 22

相关文章 15

编辑推荐

Metrics

本文评价

[1]	陈爱强, 代艳奇, 刘悦, 刘斌, 吴翰铭. 基板温度对HFE7100液滴蒸发过程的影响研究[J]. 化工学报, 2023, 74(S1): 191-197.
[2]	谈莹莹, 刘晓庆, 王林, 黄鲤生, 李修真, 王占伟. R1150/R600a自复叠制冷循环开机动态特性实验研究[J]. 化工学报, 2023, 74(S1): 213-222.
[3]	王志国, 薛孟, 董芋双, 张田震, 秦晓凯, 韩强. 基于裂隙粗糙性表征方法的地热岩体热流耦合数值模拟与分析[J]. 化工学报, 2023, 74(S1): 223-234.
[4]	程小松, 殷勇高, 车春文. 不同工质在溶液除湿真空再生系统中的性能对比[J]. 化工学报, 2023, 74(8): 3494-3501.
[5]	汪尔奇, 彭书舟, 杨震, 段远源. 含HFO混合体系气液相平衡的理论模型评价[J]. 化工学报, 2023, 74(8): 3216-3225.
[6]	王光, 单发顺, 钱禹丞, 焦建芳. 基于集成学习传递熵的化工过程微小故障检测方法[J]. 化工学报, 2023, 74(7): 2967-2978.
[7]	黄可欣, 李彤, 李桉琦, 林梅. 加装旋转叶轮T型通道流场的模态分解[J]. 化工学报, 2023, 74(7): 2848-2857.
[8]	王光宇, 张锴, 张凯华, 张东柯. 微波加热干燥煤泥热质传递及其能耗特性分析[J]. 化工学报, 2023, 74(6): 2382-2390.
[9]	张艳梅, 袁涛, 李江, 刘亚洁, 孙占学. 高效SRB混合菌群构建及其在酸胁迫条件下的性能研究[J]. 化工学报, 2023, 74(6): 2599-2610.
[10]	姚晓宇, 沈俊, 李健, 李振兴, 康慧芳, 唐博, 董学强, 公茂琼. 流体气液临界参数测量方法研究进展[J]. 化工学报, 2023, 74(5): 1847-1861.
[11]	党玉荣, 莫春兰, 史科锐, 方颖聪, 张子杨, 李作顺. 综合评价模型联合遗传算法的混合工质ORC系统性能研究[J]. 化工学报, 2023, 74(5): 1884-1895.
[12]	王荣, 王永洪, 张新儒, 李晋平. 6FDA型聚酰亚胺炭分子筛气体分离膜的构筑及其应用[J]. 化工学报, 2023, 74(4): 1433-1445.
[13]	余后川, 任腾, 张宁, 姜晓滨, 代岩, 张晓鹏, 鲍军江, 贺高红. 二维氧化石墨烯膜离子选择性传递调控的研究进展[J]. 化工学报, 2023, 74(1): 303-312.
[14]	唐茹意, 潘罕骞, 郑侠俊, 张广欣, 汪星平, 崔希利, 邢华斌. Z型全氟聚醚的结构表征[J]. 化工学报, 2023, 74(1): 479-486.
[15]	覃瑶, 张禹萌, 潘雪玲, 王文强, 戴正兴, 朱育丹, 陆小华. 限域传递机制初探：以限域状态为切入点描述传递阻力[J]. 化工学报, 2023, 74(1): 74-85.