Numerical investigation on dynamic characteristics of flow field in cyclone separators with different dust hopper structures  

作　　者：Liyun Zhu Sen Wang Yi Ru Jianzhu Wang Pengju Yang Anjun Li Zhenfei Ma Zhenbo Wang 

机构地区：[1]College of New Energy,State Key Laboratory of Heavy Oil Processing,China University of Petroleum(East China),Qingdao,266580,China [2]Hualu Engineering&Technology Co.,Ltd,Xi'an,710065,Shaanxi Province,China

出　　处：《Particuology》2023年第11期134-145,共12页颗粒学报（英文版）

基　　金：gratefully acknowledge the support from the Fundamental Research Funds for the Central Universities/the Development Fund of State Key Laboratory of Heavy Oil Processing(grant No.20CX02215A);the Natural Science Foundation of Shandong Province(grant No.ZR2021ME036);the National Natural Science Foundation of China(grant No.51806248).

摘　　要：The dynamic characteristics of flow field in cyclone separators with different dust hopper structures were studied by coupling Reynolds Stress Model(RSM)and Lagrangian Particle Tracking(LPT)methods.The characteristic frequencies of cylinder section,cone section and dust hopper were calculated as f_(1)=53 Hz,f_(2)=65 Hz,and f_(3)=8 Hz by using Fast Fourier Transform(FFT)method,respectively.Based on the effects of f3 on the motion of vortex,the separated space was divided into none affected region,weakly affected region,and strongly affected region.The characteristic frequency of dust hopper increased with the decrease of dust hopper diameter,while it was independent of the height.The dust hopper with d=1.5D(model D3)and h=1.5D(model H3)can significantly decrease the effect of back-mixing on the motion of inner vortex,which is beneficial to improve the efficiency of cyclone separator.

关 键 词：Cyclone separator Dusthopper structures Precessingvortexcore Time-frequencyanalysis Numerical simulation 

分 类 号：O35[理学—流体力学]