Coupling simulation of fluid structure interaction in the stirred vessel with a pitched blade turbine  

作　　者：Yangyang Liang Zhengming Gao Dai'en Shi Wanli Zhao Ziqi Cai 

机构地区：[1]State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China [2]Mechanical Engineering School, Yancheng Institute of Technology, Yancheng 224051, China

出　　处：《Chinese Journal of Chemical Engineering》2018年第5期922-929,共8页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China (21376016).

摘　　要：The interaction between fluid and a down-pumping pitched blade turbine fixed with a flexible shaft in the stirred vessel, as a typical fluid structure interaction phenomenon, was simulated by coupling the Computational Fluid Dynamics and Computational Structural Dynamics. Based on the verification of the simulated impeller torque and dimensionless shaft bending moment with experimental result, the dimensionless shaft bending moment and various loads acting on impeller(including lateral force, axial force and bending moment) were discussed in detail. By separating and extracting the fluid and structural components from those loads, the results show that the shaft bending moment mainly results from the lateral force on impeller although the axial force on impeller is much larger. The impeller mass imbalance increases the shaft bending moment and the lateral force on impeller, but has little influence on the axial force and bending moment acting on impeller. The dominant frequencies of impeller forces are macro-frequency, speed frequency and blade passing frequency, and are associated with the impeller mass imbalance.The interaction between fluid and a down-pumping pitched blade turbine fixed with a flexible shaft in the stirred vessel, as a typical fluid structure interaction phenomenon, was simulated by coupling the Computational Fluid Dynamics and Computational Structural Dynamics. Based on the verification of the simulated impeller torque and dimensionless shaft bending moment with experimental result, the dimensionless shaft bending moment and various loads acting on impeller （including lateral force, axial force and bending moment） were discussed in detail. By separating and extracting the fluid and structural components from those loads, the results show that the shaft bending moment mainly results from the lateral force on impeller although the axial force on im- peller is much larger. The impeller mass imbalance increases the shaft bending moment and the lateral force on impeller, but has little influence on the axial force and bending moment acting on impeller. The dominant fre- quencies of impeller forces are macro-frequency, speed frequency and blade passing frequency, and are associ- ated with the impeller mass imbalance.

关 键 词：Fluid structure interaction Shaft bending moment Impeller lateral force Impeller axial force Bending moment on impeller 

分 类 号：TQ051.72[化学工程]