Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第16卷    第11期    总第92期    2006年11月

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文章编号: 1004-0609(2006)11-1988-05
156 kA铝电解槽内电解质两相流动的数值模拟
夏小霞1, 2, 周乃君1, 崔大光1, 包生重1

(1. 中南大学 能源科学与工程学院, 长沙 410083;
2. 湘潭大学 机械工程学院, 湘潭 411105
)

摘 要:  以商业CFD软件CFX4.3为平台, 采用欧拉-欧拉方法中多流体模型和标准湍流模型, 对156 kA铝电解槽内电解质层的气液两相流动流场(半槽)进行数值模拟。 结果表明: 阳极气体的推动对铝电解槽内的电解质运动起主要作用, 电磁力的影响也较显著; 电解质运动主要是以每个阳极周围的小循环为主; 流速较大的区域主要分布在阳极间缝以及中缝和大面正对阳极间缝处; 阳极气体的平均流速为0.199 m/s, 最大流速为0.74 m/s; 电解质的平均流速为0.079 m/s, 最大流速为0.717 m/s; 阳极以下以及大面和中缝正对阳极间缝处湍流最强。

 

关键字:  铝电解槽; 电解质; 两相流动; 数值模拟

Numerical simulation on two-phase flow field of electrolyte in 156 kA aluminum reduction cells
XIA Xiao-xia1, 2, ZHOU Nai-jun1, CUI Da-guang1, BAO Sheng-zhong1

1. School of Energy Science and Engineering, Central South University,
 Changsha 410083, China;
2. Institute of Mechanical Engineering, Xiangtan University,
 Xiangtan 411105, China

Abstract: Based on the commercial CFD software CFX-4.3, the two-phase flow of the electrolyte in the 156 kA aluminum reduction cells was numerically simulated by multi-fluid model and turbulence model. The results indicate that the electrolyte flow is mainly resulted from anode gas, but the influence of electromagnetic force is also prominent. The electrolyte flow form is mainly a local circulation around each anode. The regions of high velocity are located in the anode slots and the center and the side channel at the mouth of the anode slots. The average velocity of the electrolyte is 0.079 m/s, the highest velocity is 0.717 m/s. The average and highest velocity of the gas is 0.199 m/s and 0.74 m/s respectively. The biggest value of turbulence intensity is under anodes and in the center and side channel at the mouth of the anode slots.

 

Key words: aluminum reduction cells; electrolyte; two-phase flow; numerical simulation

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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