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中南大学学报(自然科学版)

Journal of Central South University

第50卷    第1期    总第293期    2019年1月

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文章编号:1672-7207(2019)01-0001-08
不同液固动量交换系数模型对颗粒流化行为数值模拟的适应性
孙铭阳1, 2,于传兵1,吕东1,韦鲁滨2

(1. 中国恩菲工程技术有限公司,北京,100038;
2. 中国矿业大学(北京) 化学与环境工程学院,北京,100083
)

摘 要: 基于Euler-Euler法,采用包括Syamlal-O’Brien模型、Wen-Yu模型、Gidaspow模型、Gibilaro模型和Huilin-Gidaspow模型在内5个液固动量交换系数模型模拟粒径为0.25~0.35 mm石英砂颗粒流化过程。结合颗粒流化试验结果,对比不同液固动量交换系数模型预测的床层高度准确度。研究结果表明:Huilin-Gidaspow和Gidaspow模型准确度最高,其均方根误差都为5.01,Syamlal-O’Brien模型准确度最低,其均方根误差为47.14。Huilin-Gidaspow模型预测的颗粒相流态存在由中心向上,再由四周下降的循环流,与实际情况相符,而Gidaspow模型模拟结果不存在颗粒相循环流。

 

关键字: 液固流化床;动量交换系数;Euler-Euler法;两相流;Huilin-Gidaspow模型

Numerical studies of performance of various liquid-solid momentum exchange coefficient models for fluidization behavior of particles
SUN Mingyang1, 2, YU Chuanbing1, Lü Dong1, WEI Lubin2

1. China ENFI Engineering Corporation, Beijing 100038, China;
2. School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China

Abstract:Fluidization behavior of 0.25-0.35 mm quartz particles in water was simulated through Euler-Euler approach with various momentum exchange coefficient models, including Syamlal-O’Brien model, Wen-Yu model, Gidaspow model, Gibilaro model and Huilin-Gidaspow model. The bed heights predicted by using these momentum exchange coefficient models were compared with experimental values. The results show that the most accurate model is proved to be Huilin-Gidaspow model and Gidaspow model, with the same root-mean-square error (RMSE) of 5.01, while the RMSE of Syamlal-O’Brien model is 47.14, indicating the worst performance among these models. Circulating flow of particles phase was depicted from the simulation results of Huilin-Gidaspow model, which can be observed during fluidization experiments. However, particles circulating flow does not exist in the simulation results of Gidaspow model.

 

Key words: liquid-solid fluidized bed; momentum exchange coefficient; Euler-Euler approach; two-phase flow; Huilin-Gidaspow model

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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