Numerical Analysis on the Hydraulic Thrust and Dynamic Response Characteristics of a Turbine Pump

Linghua Kong, Jingwei Cao, Xiangyang Li, Xulei Zhou, Haihong Hu, Tao Wang, Shuxin Gui, Wenfa Lai, Zhongfeng Zhu, Zhengwei Wang and Yan Liu
Additional contact information
Linghua Kong: Fujian Xianyou Pumped Storage Co., Ltd., Xianyou 351200, China
Jingwei Cao: Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Xiangyang Li: Fujian Xianyou Pumped Storage Co., Ltd., Xianyou 351200, China
Xulei Zhou: Fujian Xianyou Pumped Storage Co., Ltd., Xianyou 351200, China
Haihong Hu: Fujian Xianyou Pumped Storage Co., Ltd., Xianyou 351200, China
Tao Wang: Fujian Xianyou Pumped Storage Co., Ltd., Xianyou 351200, China
Shuxin Gui: Fujian Xianyou Pumped Storage Co., Ltd., Xianyou 351200, China
Wenfa Lai: Fujian Xianyou Pumped Storage Co., Ltd., Xianyou 351200, China
Zhongfeng Zhu: Fujian Xianyou Pumped Storage Co., Ltd., Xianyou 351200, China
Zhengwei Wang: Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Yan Liu: Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China

Energies, 2022, vol. 15, issue 4, 1-15

Abstract: Pumps as turbines are widely used in the world, wherein the hydraulic thrust of a turbine pump is one of the key factors affecting the safe and stable operation of a unit. There are a lot of difficulties to evaluate the hydraulic thrust by site observation and experiment. These difficulties can be resolved if a numerical simulation is applied. The present work aims to analyze the axial and radial hydraulic thrust of a prototype turbine pump in turbine mode, and then to determine the dynamic response characteristics of the turbine pump shafting. The axial hydraulic thrust in the turbine mode is upward, with a fluctuation range of 155 t to 175 t. The pressure fluctuation in the runner can be 16% of the unit head. The simulation results provide a good reference for understanding the hydraulic performance of the turbine pump and useful guidance for the operation of the unit. The structure analysis shows that the runner has asymmetrical deformation in the axial and radial directions. The amplitude of the dynamic stress on the shafting is about 10 MPa, and the dominant frequency of the dynamic stress on the runner is 20 f n . The results could provide guidance for the operating and optimization of the unit, which helps the safe and stable operation of the station.

Keywords: turbine pump; hydraulic thrust; numerical simulation; dynamic response; fluid-structure interaction (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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