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  

Numerical studies of performance of various liquid-solid momentum exchange coefficient models for fluidization behavior of particles

作　　者：孙铭阳 于传兵[1] 吕东 韦鲁滨[2] SUN Mingyang;YU Chuanbing;Lü Dong;WEI Lubin(China ENFI Engineering Corporation,Beijing 100038,China;School of Chemical and Environmental Engineering,China University of Mining and Technology (Beijing),Beijing 100083,China)

机构地区：[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

出　　处：《中南大学学报（自然科学版）》2019年第1期1-8,共8页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51574252)~~

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0.25～0.35mm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。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.

关 键 词：液固流化床 动量交换系数 Euler-Euler法 两相流 Huilin-Gidaspow模型 

分 类 号：TD91[矿业工程—选矿]