典型文献
Effect of pitched short blades on the flow characteristics in a stirred tank with long-short blades impeller
文献摘要：
This work focuses on the design improvement of the long-short blades(LSB)impeller by using pitched short blades(SBs)to regulate the flow field in the stirred vessel.After mesh size evaluation and velocity field validation by the particle image velocimetry,large eddy simulation method coupled with sliding mesh approach was used to study the effect of the pitched SBs on the flow characteristics.We changed the inclined angles of the SBs from 30° to 60° and compared the flow characteristics when the impeller was operated in the down-pumping and up-pumping modes.In the case of down-pumping mode,the power number is relatively smaller and vortexes below the SBs are suppressed,leading to turbulence intensification in the bottom of the vessel.Whereas in the case of up-pumping mode,the axial flow rate in the center increased significantly with bigger power number,resulting in more efficient mass exchange between the axial and radial flows in the whole vessel.The LSB with 45° inclined angle of the SBs in the up-pumping mode has the most uniform distributions of flow field and turbulent kinetic energy compared with other impeller configurations.
文献关键词：
中图分类号：
作者姓名：
Yongjun Wu;Pan You;Peicheng Luo
作者机构：
School of Chemistry and Chemical Engineering,Southeast University,Nanjing 211189,China
文献出处：
引用格式：
[1]Yongjun Wu;Pan You;Peicheng Luo-.Effect of pitched short blades on the flow characteristics in a stirred tank with long-short blades impeller)[J].中国化学工程学报（英文版）,2022(05):143-152
A类：
pitched
B类：
Effect,short,blades,characteristics,stirred,tank,long,impeller,This,work,focuses,design,improvement,LSB,by,using,SBs,regulate,field,vessel,After,mesh,size,evaluation,velocity,validation,particle,image,velocimetry,large,eddy,simulation,method,coupled,sliding,approach,was,used,study,effect,We,changed,inclined,angles,from,compared,when,operated,down,pumping,modes,In,case,power,number,relatively,smaller,vortexes,below,suppressed,leading,turbulence,intensification,bottom,Whereas,axial,center,increased,significantly,bigger,resulting,more,efficient,mass,exchange,between,radial,flows,whole,has,most,uniform,distributions,turbulent,kinetic,energy,other,configurations
AB值：
0.490505
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