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

Leilei Du, Fankun Zheng, Bo Gao, Mona Gad, Delin Li and Ning Zhang ()
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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
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

Energies, 2024, vol. 17, issue 10, 1-18

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.

Keywords: centrifugal pump; rotor and stator matching mode; pressure pulsation; flow structure (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: 2024
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