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浙江大学学报(工学版)  2017, Vol. 51 Issue (10): 2070-2076    DOI: 10.3785/j.issn.1008-973X.2017.10.023
环境工程、化学工程     
文丘里气泡发生器的气泡尺寸及分布
颜攀, 黄正梁, 王靖岱, 蒋斌波, 阳永荣
浙江大学 化学工程与生物工程学院, 化学工程联合国家重点实验室, 浙江 杭州 310027
Bubble size and its distribution for Venturi bubble generator
YAN Pan, HUANG Zheng-liang, WANG Jing-dai, JIANG Bin-bo, YANG Yong-rong
State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
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摘要:

提出使用文丘里气泡发生器的微鼓泡反应器,以空气-水为模拟介质,高速相机为测量手段,考察操作条件和结构参数对文丘里气泡发生器气泡尺寸分布、气泡Sauter平均直径的影响.研究发现,文丘里气泡发生器的气泡Sauter平均直径随着气量的增大而增大,随着液量的增大而减小;当气孔位置位于喉管处时,气泡Sauter平均直径最小;当喉管液速为0.983~2.949 m/s时,气泡Sauter平均直径随气孔数量的增加而减小;当喉管液速为3.932~4.915 m/s时,气泡Sauter平均直径随气孔数量的增加先减小后略有增大,当开孔数大于6时,气孔数量对气泡Sauter平均直径的影响较小.通过对多组实验的回归分析,提出气泡Sauter平均直径与液相雷诺数、气相雷诺数的经验关联式,计算值与实际值吻合较好.

Abstract:

The Venturi bubble generator was applied in the micro bubble column reactor based on the air-water system in order to analyze the influences of operating conditions and structural parameters on the bubble size distribution and bubble Sauter mean diameter by the high speed camera. Results show that the bubble Sauter mean diameter increases under higher gas flow rate whereas it decreases under higher liquid flow rate. The bubble Sauter mean diameter reaches the minimum when air holes are located at the Venturi throat. When liquid velocity at the Venturi throat ranges from 0.983 to 2.949 m/s, bubble Sauter mean diameter decreases with the increase in the number of air holes. While liquid velocity at the Venturi throat ranges from 3.932 to 4.915 m/s, bubble Sauter mean diameter decreases at first and then slightly increases. The number of the air hole has little influence on bubble Sauter mean diameter when it is more than 6. An empirical correlation of bubble Sauter mean diameter based on ReL and ReG was proposed through the regression analysis. The calculated values accorded well with the experimental data.

收稿日期: 2016-08-29 出版日期: 2017-09-27
CLC:  TQ021  
基金资助:

国家自然科学基金资助项目(91434205,21406194);国家杰出青年科学基金资助项目(21525627);浙江省自然科学基金资助项目(LR14B060001);高等学校博士学科点专项科研基金资助项目(20130101110063).

通讯作者: 黄正梁,男,助理研究员.ORCID:0000-0002-8457-6394.     E-mail: huangzhengl@zju.edu.cn
作者简介: 颜攀(1992-),男,硕士生,从事多相流反应器研究.ORCID:0000-0002-0656-9420.E-mail:yanpan1992@yeah.net
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引用本文:

颜攀, 黄正梁, 王靖岱, 蒋斌波, 阳永荣. 文丘里气泡发生器的气泡尺寸及分布[J]. 浙江大学学报(工学版), 2017, 51(10): 2070-2076.

YAN Pan, HUANG Zheng-liang, WANG Jing-dai, JIANG Bin-bo, YANG Yong-rong. Bubble size and its distribution for Venturi bubble generator. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2017, 51(10): 2070-2076.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2017.10.023        http://www.zjujournals.com/eng/CN/Y2017/V51/I10/2070

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