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Comparative Analysis of Strength and Modal Characteristics of a Full Tubular Pump and an Axial Flow Pump Impellers Based on Fluid-Structure Interaction

Author

Listed:
  • Lijian Shi

    (College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225000, China
    Hydrodynamic Engineering Laboratory of Jiangsu Province, Yangzhou 225009, China)

  • Jun Zhu

    (College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225000, China)

  • Li Wang

    (Huai’an Institute of Hydraulic Survey and Design, Ltd., Huai’an 223001, China)

  • Shiji Chu

    (International Center for Small Hydro Power, Hangzhou 310002, China)

  • Fangping Tang

    (College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225000, China
    Hydrodynamic Engineering Laboratory of Jiangsu Province, Yangzhou 225009, China)

  • Yan Jin

    (College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225000, China
    Hydrodynamic Engineering Laboratory of Jiangsu Province, Yangzhou 225009, China)

Abstract

Fluid-structure interaction (FSI) was used to determine the structural mechanical characteristics of full tubular and axial-flow pumps. The results showed that as the flow rate increases, the total deformation and equivalent stress are significantly reduced. The max total deformation (MTD) and the max equivalent stress (MES) of the full tubular pump impeller occur on the outer edge of the blade. There are two stress concentrations in the full tubular pump impeller, one of which is located in the outlet area of the rim, and the other is located in the outlet area of the hub. However, the MES of the axial-flow pump appears in the center of the blade hub. The performance difference between the full tubular pump and the axial-flow pump is mainly caused by the clearance backflow. The natural frequency of the full tubular pump is lower than that of the axial-flow pump on the basis of the modal results. The MES of the full tubular pump is mainly concentrated at the junction of the blade and the motor rotor, and the max thickness of the rim is 6mm, which can be more prone to cracks and seriously affect the safety and stability of the pump.

Suggested Citation

  • Lijian Shi & Jun Zhu & Li Wang & Shiji Chu & Fangping Tang & Yan Jin, 2021. "Comparative Analysis of Strength and Modal Characteristics of a Full Tubular Pump and an Axial Flow Pump Impellers Based on Fluid-Structure Interaction," Energies, MDPI, vol. 14(19), pages 1-18, October.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:19:p:6395-:d:650883
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    References listed on IDEAS

    as
    1. Shi, Lijian & Zhang, Wenpeng & Jiao, Haifeng & Tang, Fangping & Wang, Li & Sun, Dandan & Shi, Wei, 2020. "Numerical simulation and experimental study on the comparison of the hydraulic characteristics of an axial-flow pump and a full tubular pump," Renewable Energy, Elsevier, vol. 153(C), pages 1455-1464.
    2. Lijian Shi & Jun Zhu & Fangping Tang & Chuan Wang, 2020. "Multi-Disciplinary Optimization Design of Axial-Flow Pump Impellers Based on the Approximation Model," Energies, MDPI, vol. 13(4), pages 1-19, February.
    3. Shi, Lijian & Yuan, Yao & Jiao, Haifeng & Tang, Fangping & Cheng, Li & Yang, Fan & Jin, Yan & Zhu, Jun, 2021. "Numerical investigation and experiment on pressure pulsation characteristics in a full tubular pump," Renewable Energy, Elsevier, vol. 163(C), pages 987-1000.
    4. Li, Deyou & Song, Yechen & Lin, Song & Wang, Hongjie & Qin, Yonglin & Wei, Xianzhu, 2021. "Effect mechanism of cavitation on the hump characteristic of a pump-turbine," Renewable Energy, Elsevier, vol. 167(C), pages 369-383.
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