Characteristics of gas-liquid two-phase flow in a stirred tank with double-layer punched impeller

被引：1

作者：

Liu, Tian ^{[1
]}

Si, Wen ^{[2
]}

Qiao, Juanjuan ^{[1
]}

Luan, Deyu ^{[3
]}

Chen, Songying ^{[1
]}

机构：

[1] Shandong Univ, Sch Mech Engn, Jinan 250061, Peoples R China

[2] Qingdao 4308 Machinery Plant, Qingdao 266042, Peoples R China

[3] Qingdao Univ Sci & Technol, Coll Electromech Engn, Qingdao 266061, Peoples R China

来源：

PHYSICS OF FLUIDS | 2024年 / 36卷 / 10期

基金：

中国国家自然科学基金;

关键词：

NUMERICAL-SIMULATION; MASS-TRANSFER; CFD; PERFORMANCE;

D O I：

10.1063/5.0224106

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This study investigates the gas-liquid two-phase flow characteristics in a stirred tank equipped with a double-layer punched impeller. Numerical simulations are conducted to analyze flow dynamics, gas holdup, bubble sizes, and distributions under various operational conditions. The results show a high degree of agreement between experimental and simulated power values and gas holdup distributions, validating the reliability of the computational fluid dynamics-population balance model coupling approach. The combination of the punched four-inclined-blade up-pumping turbine and the punched Rushton impeller exhibits excellent bubble dispersion characteristics, with overall small bubble sizes. Increasing the rotational speed can enhance turbulence within the flow field and accelerate the liquid phase velocity, which facilitates gas diffusion and improves gas-liquid mixing efficiency. Additionally, higher rotational speed further intensifies the shear effect of the punched impeller, resulting in a reduction in average bubble size.

引用

页数：16

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