Identification and analysis of the inlet vortex of an axial-flow pump
作者机构：College of Hydraulic Science and EngineeringYangzhou UniversityYangzhou225009China
出 版 物：《Journal of Hydrodynamics》 (水动力学研究与进展B辑（英文版）)
年 卷 期：2022年第34卷第2期
页 面：234-243页
核心收录：
学科分类：080704[工学-流体机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 0837[工学-安全科学与工程] 0815[工学-水利工程]
基 金：supported by the National Natural Science Foundation of China(Grant No.51376155).
主 题：Axial-flow pump inlet vortex vortex identification vortex generator numerical simulation experiment
摘 要：Axial-flow pumps are widely employed in urban flood control and drainage pumping stations.The inlet vortex is one factor that seriously threaten the safe,stable and efficient operation of axial-flow pump units.In this paper,the vortex recognition performances of two vortex identification methods,the Q—criterion and Liutex methods,are compared based on an axial-flow pump,and the interactions between the impeller and vortex are explored.A flat plate vortex generator is installed in front of the impeller to continuously induce a stable vortex.The numerical simulation results show that the Liutex method can not only simultaneously identify strong and weak vortices but also reduce the influence of shear force at the sidewall.The vortex and the impeller influence each other.Under the influence of rotating blades,the vortex changes from a low frequency to the blade frequency,and the vortex significantly changes the tangential velocity inside the impeller.The accuracy of the numerical simulation results is verified by experiments on the external and internal characteristics.
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