化工学报2019，Vol.70Issue(2)：487-495,9.DOI:10.11949/j.issn.0438⁃1157.20181220
CFD-PBM耦合模型模拟气液鼓泡床的通用性研究
Generality of CFD-PBM coupled model for simulations of gas-liquid bubble column
摘要
Abstract
The generality of the CFD-PBM coupled model was studied by comparing the simulation results with experimental data under different operating pressures and liquid properties. The results show that the CFD-PBM coupled model with the modified pressure factor obtained from the internal-flow bubble breakup model can well predict the influence trend of pressure on the hydrodynamics of bubble column. The gas holdup increases significantly with increasing pressure. In addition, the simulation results for different liquid viscosity and surface tension are consistent with the experimental results. With increasing liquid viscosity, the bubble breakup rate decreases, which leads to a wider bubble size distribution, lower drag correction factor and decreased gas holdup. As the surface tension decreases, the bubble breakup rate increases, which results in smaller bubbles and higher gas holdup. The CFD-PBM coupling model has good versatility because it considers the effects of pressure, liquid viscosity and surface tension on bubble coalescence, fracture and gas-liquid interaction.关键词
鼓泡床/CFD-PBM耦合模型/操作压力/物性参数/气含率Key words
bubble column/ CFD-PBM coupled model/ operating pressure/ physical properties/ gas holdup分类
化学化工引用本文复制引用
张华海,王铁峰..CFD-PBM耦合模型模拟气液鼓泡床的通用性研究[J].化工学报,2019,70(2):487-495,9.基金项目
国家重点研发计划项目(2017YFB0602500) （2017YFB0602500）
国家自然科学基金项目(21476122) （21476122）
