循环流化床提升管内气固流动的三维数值模拟研究  

THE THREE-DIMENSIONAL NUMERICAL INVESTIGATION OF GAS-SOLID FLOW IN A CFB RISER

作　　者：吴学智[1,2] 王雪瑶[1] 王圣典[1,2] 王嘉昌[1,2] 姜凡[1] 徐祥[1,2] 肖云汉[1] 

机构地区：[1]中国科学院先进能源动力重点实验室,工程热物理研究所,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《工程热物理学报》2010年第8期1331-1334,共4页Journal of Engineering Thermophysics

基　　金：国家863高技术研究发展计划项目(No.2006AA05A103)

摘　　要：采用双流体模型结合基于流动结构的EMMS曳力模型,对一方形截面循环流化床提升管在同一操作气速、不同固体流率下的两种工况进行了三维数值模拟研究。得到了提升管内气固流动的三维浓度分布,并对比了二维模拟的结果。验证了EMMS曳力模型对于快速流态化三维模拟的适用性。In this study,a 3D two-fluid model combined with the EMMS drag model was used to simulate two test conditions with the same superficial gas velocity and the different solids fluxes in a bench-scale square cross-section CFB riser.The calculated axial solid hold-up profiles which agreed well with the experimental data were compared to the 2D simulation results.This work also shows the ability of the EMMS drag model to capture the heterogeneity structures（clusters） of fast fluidization in 3D CFB risers.

关 键 词：循环流化床 提升管 双流体模型 气固曳力 EMMS模型 三维模拟 

分 类 号：TK123[动力工程及工程热物理—工程热物理]