化学工程2017，Vol.45Issue(5)：56-61,6.DOI:10.3969/j.issn.1005-9954.2017.05.013
聚氨酯低压混合器内流场的数值模拟和实验研究
Experimental study and numerical simulation of flow field in polyurethane low-pressure mixer
摘要
Abstract
In order to study the flow field of polyurethane low-pressure mixer and the influence of impeller's different structure to the species transport process in mixer,a unsteady species transport 3D numerical simulation was conducted by using computational fluid dynamics software Fluent,standard model,standard wall function and species transport equation (noreactions).The results indicate that fluid flow is in good condition,there is no obvious dead zone and the mixing time of species transport is 30 s.The mixing effectiveness is the best,when the impeller layers,impellers and impeller angel are 8,8 and 15 °,respectively.A species transport experiment was carried on to validate the reliability of simulation.A good agreement was obtained between the experimental data of acetone volume fraction and the simulation results in the flowfields of ethanol-acetone systems,and the maximum relative error was lower than 5％.This suggests that using CFD model to simulate and forecast the process of species transport is feasible and effective in the low-pressure mixer.关键词
聚氨酯低压混合器/组分输运/数值模拟/混合时间Key words
polyurethanelow-pressure mixer/species transport/numerical simulation/mixing time分类
化学化工引用本文复制引用
付琳,翟金国,包春凤,王世忠,许保云,王宇红..聚氨酯低压混合器内流场的数值模拟和实验研究[J].化学工程,2017,45(5):56-61,6.基金项目
上海市自然科学基金资助项目(14ZR1420800) （14ZR1420800）
