CFD Prediction of Mean Flow Field and Impeller Capacity for Pitched Blade Turbine  

作　　者：乔胜超 王日杰 杨晓霞 闫越飞 

机构地区：[1]School of Chemical Engineering and Technology Tianjin University

出　　处：《Transactions of Tianjin University》2015年第3期250-258,共9页天津大学学报（英文版）

摘　　要：This work focused on exploring a computational fluid dynamics(CFD)method to predict the macromixing characteristics including the mean flow field and impeller capacity for a 45° down-pumping pitched blade turbine(PBT)in stirred tanks. Firstly, the three typical mean flow fields were investigated by virtue of three components of liquid velocity. Then the effects of impeller diameter(D)and off-bottom clearance(C)on both the mean flow field and three global macro-mixing parameters concerning impeller capacity were studied in detail. The changes of flow patterns with increasing C/D were predicted from these effects. The simulation results are consistent with the experimental results in published literature.This work focused on exploring a computational fluid dynamics （CFD）method to predict the macro- mixing characteristics including the mean flow field and impeller capacity for a 45° down-pumping pitched blade tur- bine （PBT） in stirred tanks. Firstly, the three typical mean flow fields were investigated by virtue of three components of liquid velocity. Then the effects of impeller diameter （D） and off-bottom clearance （C） on both the mean flow field and three global macro-mixing parameters concerning impeller capacity were studied in detail. The changes of flow patterns with increasing C/D were predicted from these effects. The simulation results are consistent with the experi- mental results in published literature.

关 键 词：CFD simulation PBT stirred tank flow field pumping capacity 

分 类 号：O35[理学—流体力学]