基于Wray-Agarwal湍流模型的鼓泡流化床气固流动的模拟研究与分析  

Simulation study and analysis of gas⁃solid flow in a bubbling fluidized bed based on Wray-Agarwal turbulence model

作　　者：乔红旺 宋钊毅 向阳[1] QIAO HongWang;SONG ZhaoYi;XIANG Yang(College of Chemical Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学化学工程学院,北京100029

出　　处：《北京化工大学学报（自然科学版）》2023年第6期1-7,共7页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家自然科学基金(22078009)。

摘　　要：采用一方程Wray-Agarwal(WA)湍流模型结合欧拉-欧拉双流体模型模拟了鼓泡流化床内流体力学性能,并将WA模型、Standard k-ε模型及Shear Stress Transfer(SST)k-ω模型的模拟结果与实验值进行对比。结果表明,3种湍流模型均可对气固流化床的流动进行模拟;WA模型预测的床层压降与理论值的相对误差最小,仅为1.6%;WA模型模拟的轴向空隙率和径向固含率分布在床层中部与实验结果吻合最好。结果证明了WA模型的可靠性和适用性,在多相流的模拟中有广阔的应用前景。In this paper,the one⁃equation Wray-Agarwal(WA)turbulence model combined with the Euler⁃Euler two⁃fluid model was used to simulate the dynamics characteristics in a bubbling fluidized bed,and the simulation results of the WA model,Standard k-εmodel and the SST k-ωmodel were compared with the experimental data.The results show that all three turbulence models can simulate the flow in the gas⁃solid fluidized bed.The relative error between the bed pressure drop predicted by the WA model and the theoretical value is the smallest,only 1.6%;the distributions of axial void ratio and radial solid content ratio in the middle of the bed simulated by the WA model are in the best agreement with the experimental results,indicating that the WA model has reliability and applicability,and has a broad application prospect in the simulation of multiphase flow.

关 键 词：Wray-Agarwal湍流模型 流化床 多相流 数值模拟 

分 类 号：TQ051.1[化学工程]