武 强， 章 凯， 王 帅

（哈尔滨工业大学 能源科学与工程学院， 黑龙江 哈尔滨 150001)

DOI:10.13732/j.issn.1008-5548.2021.03.003

收稿日期： 2021-01-12，修回日期：2021-03-12，在线出版时间：2021-04-07 16:09。

基金项目：国家自然科学基金，编号：52076060。

第一作者简介：武强(1999—)，男，硕士研究生，研究方向为多相流数值模拟。E-mail: 969548078@qq.com。

通信作者简介：王帅(1985—)，男，博士，教授，博士生导师，研究方向为多相流动与热质传递，颗粒流体复杂系统的计算流体力学与反应器多尺度模拟。E-mail: shuaiwang@hit.edu.cn。

摘要：采用欧拉-拉格朗日混合方法，对旋流流化床的流动及传热性能进行相关研究;对旋流流化床中床层局部空隙率和颗粒旋流速度进行预测，在此基础上探讨反应器内壁面的磨损行为，分析运行状态对于磨损行为的影响;进一步对床层与壁面间的传热行为以及气固相间传热行为、操作速度的影响等进行研究。结果表明:床层空隙率分布以及颗粒旋流速度大小对于操作速度的变化较为敏感，稳定旋流模式下壁面磨损大幅增强;小颗粒相表现出更好的相间传热性能。

关键词：旋流流化床；稠密离散相模型；流动；磨损；传热

Abstract：In this paper,a hybrid Eulerian-Lagrangian approach was used to study the flow and heat transfer performance of a swirling fluidized bed. Based on the prediction of local bed voidage and particle swirling velocity in the swirling fluidized bed,the wear behavior of the wall was studied,and the influence of operating conditions on the wear behavior was analyzed. Moreover,the bed-to-wall heat transfer and gas-solid interphase heat transfer were analyzed,and the influence of operating speed was also considered. The results show that the bed voidage distribution in the bed and the swirl velocity of particles are sensitive to the change of operation gas velocity,and the wall wear increases greatly in the stable swirling mode. In addition,small particles show better interphase heat transfer performance than others.

Keywords：swirling fluidized bed; dense discrete phase model; flow characteristic; wear; heat transfer

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