Numerical Investigation of Flow and Structural Characteristics of a Large High-Head Prototype Pump–Turbine during Turbine Start-Up

Xilong Yin, Xingxing Huang, Shaozheng Zhang, Huili Bi and Zhengwei Wang ()
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Xilong Yin: Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Xingxing Huang: S.C.I. Energy, Future Energy Research Institute, Seidengasse 17, 8706 Zurich, Switzerland
Shaozheng Zhang: Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Huili Bi: Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Zhengwei Wang: Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China

Energies, 2023, vol. 16, issue 9, 1-19

Abstract: Transient processes that occur in pumped storage power plants can cause high-pressure conditions, which in turn can result in vibrations in the pump–turbine structure and even damage to structural components. It is therefore crucial to research the transient process of the large pump–turbine units and the flow-induced vibrations of the structural components. The three-dimensional flow field and structural field models of a high-head prototype pump–turbine were constructed to study its flow characteristics and structural characteristics under the turbine start-up. Calculations and analyses were performed on the pressure variation and the flow-induced stress concentrations of the pump–turbine during start-up in turbine mode. The simulated pressure distributions during the turbine start-up were mapped onto the finite element calculation model of the structures of the pump–turbine to calculate the flow-induced stress concentrations. This study provides a reference to improve the design and operation of high-head prototype pump–turbines based on the findings of the flow and structural characteristics.

Keywords: pump–turbine; flow and structural characteristics; fluid–structure coupling; turbine start-up; stress concentration (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: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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