CFD simulation of impeller shape effect on quality of mixing in two-phase gas–liquid agitated vessel  

作　　者：Amir Heidari 

机构地区：[1]Process Simulation and Modeling Laboratory(PSMlab),Faculty of Chemical,Petroleum and Gas Engineering,Semnan University,Semnan 3513119111,Iran

出　　处：《Chinese Journal of Chemical Engineering》2020年第11期2733-2745,共13页中国化学工程学报（英文版）

基　　金：Semnan University for the financial support of this research(grant number 845)。

摘　　要：Mixing efficiency in two-phase gas–liquid agitated vessel is one of the important challenges in the industrial processes.Computational fluid dynamics technique(CFD)was used to investigate the effect of four different pitched blade impellers,including 15°,30°,45°and 60°,on the mixing quality of gas–liquid agitated vessel.The multiphase flow behavior was modeled by Eulerian–Eulerian multiphase approach,and RNG k-εwas used to model the turbulence.The CFD results showed that a strong global vortex plays the main role on the mixing quality of the gas phase in the vessel.Based on the standard deviation criterion,it was observed that the axial distribution of the gas phase in the 30°impeller is about 55%better than the others.In addition,the results showed that the 30°impeller has a uniform radial distribution over the other impellers and the maximum gas phase holdup in the vessel.Investigation of the power consumption of the impellers showed that the 30°impeller has the highest power consumption among the other pitched blade impellers.Also,examine the effect of same power condition for pitched blade impellers showed that the 30°impeller has the best mixing quality in this condition.

关 键 词：Pitched blade impeller MIXING CFD Multiphase flow RNG k-εmodel 

分 类 号：TQ051.7[化学工程]