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Article

Numerical Analysis and Model Test Verification of Energy and Cavitation Characteristics of Axial Flow Pumps

1
College of Engineering, Anhui Agricultural University, Hefei 230036, China
2
College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 214000, China
*
Author to whom correspondence should be addressed.
Academic Editors: Ran Tao, Changliang Ye and Xijie Song
Water 2022, 14(18), 2853; https://doi.org/10.3390/w14182853
Received: 23 July 2022 / Revised: 4 September 2022 / Accepted: 8 September 2022 / Published: 13 September 2022
(This article belongs to the Special Issue Advancement in the Fluid Dynamics Research of Reversible Pump-Turbine)
In order to study the energy and cavitation performance of a high-ratio axial flow pump, the SST k-ω turbulence model and ZGB cavitation model were used to numerically calculate the energy and cavitation performance of a high-ratio axial flow pump, and a model test analysis was carried out. The study concluded that the errors in the numerical calculation of head, efficiency, and critical cavitation margin are within 0.2 m, about 3% and 5%, respectively, and the numerical calculation results are reliable. For the flow conditions of Q = 411 L/s, 380 L/s, 348 L/s, and 234 L/s, the numerically calculated critical cavitation margins are 7.1 m, 5.7 m, 4.6 m, and 9.5 m, respectively, and the experimental critical cavitation margins are 7.5 m, 4.9 m, 4.6 m, and 9.5 m, respectively, with errors of −0.4 m, 0.8 m, 0.0 m, and 0.0 m, in that order; numerical calculations and test results trend the same, with small errors. Under the same inlet pressure, as the flow rate decreases, the vacuole first appears at the head of the blade pressure surface under the large flow rate condition (Q = 411 L/s), and the vacuole appears at the head of the blade suction surface under the small flow rate condition (Q = 234 L/s). As the inlet pressure decreases (pin = 11 × 104–4 × 104 Pa), the vacuole gradually increases under the same flow rate and the cavitation degree increases. The research results of this paper can provide a reference for the study of the energy and cavitation mechanism of the same type of axial flow pump. View Full-Text
Keywords: axial flow pumps; energy; cavitation; numerical calculation; test axial flow pumps; energy; cavitation; numerical calculation; test
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MDPI and ACS Style

Xie, C.; Zhang, C.; Fu, T.; Zhang, T.; Feng, A.; Jin, Y. Numerical Analysis and Model Test Verification of Energy and Cavitation Characteristics of Axial Flow Pumps. Water 2022, 14, 2853. https://doi.org/10.3390/w14182853

AMA Style

Xie C, Zhang C, Fu T, Zhang T, Feng A, Jin Y. Numerical Analysis and Model Test Verification of Energy and Cavitation Characteristics of Axial Flow Pumps. Water. 2022; 14(18):2853. https://doi.org/10.3390/w14182853

Chicago/Turabian Style

Xie, Chuanliu, Cheng Zhang, Tenglong Fu, Tao Zhang, Andong Feng, and Yan Jin. 2022. "Numerical Analysis and Model Test Verification of Energy and Cavitation Characteristics of Axial Flow Pumps" Water 14, no. 18: 2853. https://doi.org/10.3390/w14182853

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