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Numerical Investigation of Rotor and Stator Matching Mode on the Complex Flow Field and Pressure Pulsation of a Vaned Centrifugal Pump

Author

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  • Leilei Du

    (School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China)

  • Fankun Zheng

    (School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
    Suzhou Lvkon Transmission S&T, Co., Ltd., Suzhou 215299, China)

  • Bo Gao

    (School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China)

  • Mona Gad

    (School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China)

  • Delin Li

    (School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China)

  • Ning Zhang

    (School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China)

Abstract

The match of rotor and stator blades significantly affects the flow field structure and flow-induced pressure pulsation characteristics inside the pump. In order to study the effects of the rotor and stator matching mode on the complex flow field and pressure pulsation of a centrifugal pump with a vaned diffuser, this paper designs three different vaned diffusers (DY5, DY8 and DY9) and uses the DDES (Delayed Detached Eddy Simulation) numerical method combined with structured grids to simulate the unsteady flow phenomena of the model pump under rated conditions. The results show that, under different rotor and stator matching modes, the pressure pulsation spectrum is dominated by the blade passing frequency and its harmonics. The matching mode of the rotor and stator significantly affects the time–frequency domain characteristics of the pressure pulsation inside the pump, and it is observed that the pressure pulsation energy of vaned diffusers with more blades is significantly smaller than that of fewer-blade vaned diffusers in comparison to the energy of the pressure pulsation at the blade passing frequency and within the 10–1500 Hz frequency band. Combined with the distribution characteristics of the complex flow field inside the pump, it can be found that increasing the number of vaned diffuser blades can reduce the energy of flow-induced pressure pulsation, improve the distribution of high-energy vortices in the interaction zone and stabilize the flow inside the centrifugal pump effectively.

Suggested Citation

  • Leilei Du & Fankun Zheng & Bo Gao & Mona Gad & Delin Li & Ning Zhang, 2024. "Numerical Investigation of Rotor and Stator Matching Mode on the Complex Flow Field and Pressure Pulsation of a Vaned Centrifugal Pump," Energies, MDPI, vol. 17(10), pages 1-18, May.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:10:p:2416-:d:1396786
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    References listed on IDEAS

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    1. Ni, Dan & Zhang, Ning & Gao, Bo & Li, Zhong & Yang, Minguan, 2020. "Dynamic measurements on unsteady pressure pulsations and flow distributions in a nuclear reactor coolant pump," Energy, Elsevier, vol. 198(C).
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