T型突变出口提升管气固流动的数值模拟研究  

THE NUMERICAL INVESTIGATION OF GAS-SOLID FLOW IN A RISER WITH A T-ABRUPT EXIT

作　　者：吴学智[1] 王雪瑶[1] 姜凡[1] 徐祥[1] 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

出　　处：《工程热物理学报》2009年第8期1327-1330,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：循环流化床提升管内气固流动不仅受操作工况的影响,还与出口结构密切相关。本文应用双流体模型结合EMMS曳力模型,对T型突变出口提升管内两种工况的气固流动进行了二维模拟。模拟得到的轴向固体浓度分布和实验值符合较好。验证了EMMS曳力模型对于快速流态化气固不均匀流动模拟的适用性。Gas-solid flow in circulating fluidized bed （CFB） risers depended on not only the test conditions but also the exit configurations. In this study, a 2D two-fluid model combined with the EMMS drag model was used to simulate a bench-scale square cross-section riser with a T-abrupt exit. The calculated axial solid hold-up profiles agreed well with the experimental data. This work also shows the ability of the EMMS drag model to capture the heterogeneity structures （clusters） of fast fluidization in CFB risers.

关 键 词：循环流化床 T型突变出口 双流体模型 气固曳力 EMMS模型 

分 类 号：TK222[动力工程及工程热物理—动力机械及工程]