A systematic experimental study and dimensionless analysis of bubble plume oscillations in rectangular bubble columns

被引：30

作者：

Liu, Liu ^{[1
,2
]}

Yan, Hongjie ^{[1
]}

Ziegenhein, Thomas ^{[2
,3
]}

Hessenkemper, Hendrik ^{[2
]}

Li, Qing ^{[1
]}

Lucas, Dirk ^{[2
]}

机构：

[1] Cent S Univ, Sch Energy Sci & Engn, Changsha 410083, Hunan, Peoples R China

[2] Helmholtz Zentrum Dresden Rossendorf, Inst Fluid Dynam, D-01328 Dresden, Germany

[3] Arizona State Univ, Sch Engn Matter Transport & Energy, Tempe, AZ 85287 USA

来源：

CHEMICAL ENGINEERING JOURNAL | 2019年 / 372卷

基金：

中国国家自然科学基金;

关键词：

Bubble plume; Gas-liquid flow; Bubble column; Plume oscillation frequency; Particle Shadow Velocimetry; GAS-LIQUID FLOW; X-RAY-MEASUREMENT; ASPECT RATIO; AIR BUBBLES; SIMULATION; DYNAMICS; VELOCIMETRY; VELOCITY; HOLDUP; CHAIN;

D O I：

10.1016/j.cej.2019.04.158

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Unsteady bubble plume oscillations significantly influence the characteristics of the flow and especially the mixing occurring in bubble column reactors. In the present work, the frequencies of oscillations of centrally aerated bubble plumes in rectangular bubble columns are experimentally studied in water and aqueous glycerol solutions. The effects of the superficial gas velocity, aspect ratio, aerated width, needle size and the liquid viscosity on the low-frequency oscillations are investigated. The performance of the dimensionless numbers characterizing the plume oscillation published in the literature is assessed with the present experimental data. Dimensionless analysis is performed and a new empirical correlation is proposed based on the present experiments, and then validated through a large number of available experimental data in the literature. The experimental data and dimensionless analysis presented here can help to optimize the flow characteristics for specific processes in bubble column reactors. Further, the results can be used for validating corresponding computational models.

引用

页码：352 / 362

页数：11

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