化工进展2024，Vol.43Issue(z1)：13-20,8.DOI:10.16085/j.issn.1000-6613.2024-0174
工业气固流化床内流场的CFD-PBM数值模拟和结构优化
Numerical simulation and structural optimization of flow field in industrial gas-solid fluidized beds based on CFD-PBM
摘要
Abstract
The multi-level geometric structures within a fluidized bed influence the dynamics,thermodynamics,and chemical reactions of the internal fluids.Numerical simulation studies of the flow field inside fluidized beds contribute to understanding their complex flow characteristics,establishing a theoretical basis for optimizing the geometric structure and operating conditions of the fluidized beds,thereby enhancing their mass transfer efficiency and performance.Based on computational fluid dynamics theory,a method for the numerical simulation of the flow field within gas-solid fluidized beds was developed.The study investigated the effects of the geometry of the distributor,the diameter of the bed,and the length of the distributor's brim on the flow field within the industrial gas-solid fluidized bed.On this basis,by integrating the Quadrature Method of Moments,a CFD-PBM coupled model was constructed.Utilizing this model,a numerical simulation method for the fluidization state and agglomeration behavior of nanoparticles in the industrial gas-solid fluidized bed was developed,further validating the influence of barrel diameter on the fluidization state of nanoparticles within the fluidized bed.The study indicated that when the diameter was 260mm,the gas velocity distribution around the distributor was uniform,and the dead zone of airflow at the bottom of the distributor was minimized.When the brim length was half the size of the distributor's outlet,the gas velocity distribution within the fluidized bed was more uniform.关键词
流化床/计算流体力学-群体平衡模型/数值模拟/优化设计/纳米颗粒Key words
fluidized-bed/computational fluid dynamics-population balance model/numerical simulation/optimal design/nanoparticles分类
化学化工引用本文复制引用
毛宁轩,万小维,鞠杰,胡彦杰,江浩..工业气固流化床内流场的CFD-PBM数值模拟和结构优化[J].化工进展,2024,43(z1):13-20,8.基金项目
国家自然科学基金(22378128,22108079,U22B20143,U22A20429) （22378128,22108079,U22B20143,U22A20429）
上海市科学技术委员会基金(22dz1205900). （22dz1205900）
