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  4. Vol 9, Issue 3, 2024

Study on the Mechanism of Cavitation and Pressure Pulsation in Axial Flow Pumps under Unsteady Operating Conditions

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DOI: 10.23977/jemm.2024.090310 | Downloads: 23 | Views: 653

Author(s)

Yu Yunyun 1, Zhou Daqing 2, Sun Ying 3, Zhang Zhichao 4

Affiliation(s)

1 School of Air Transportation and Engineering, Nanhang Jincheng College, Nanjing, China
2 College of Energy &Electrical Engineering, Hohai University, Nanjing, China
3 Jinan Energy Group Education Consulting Co., Ltd, Jinan, China
4 Jinan Thermal Power Group Co., Ltd. Jinan, China

Corresponding Author

Yu Yunyun

ABSTRACT

This paper presents a study on the cavitation and pressure pulsation mechanisms in axial flow pumps under different cavitation margin conditions. The entire flow passage of the pump is modeled and meshed, and non-steady numerical calculations are performed using CFX software. The calculations use the M-PANS (Modified Partially Averaged Navier-Stokes) turbulence model and the Zwart cavitation model. Cavitation observations and pressure pulsation monitoring were conducted in the experiments, and the results were compared with the numerical calculations to verify the reliability of the computational methods used in this study. Pressure pulsation distributions and changes were monitored at the impeller inlet and outlet, blade suction surface, and blade tip clearance, followed by pressure spectrum analysis. By analyzing the variation patterns of pressure pulsations before and after cavitation and the observed cavitation regions in the experiments, the study explores the correlation mechanism between cavitation and pressure pulsations. 

KEYWORDS

Axial Flow Pump, Pressure Pulsation, Cavitation Characteristics, Experimental Validation

CITE THIS PAPER

Yu Yunyun, Zhou Daqing, Sun Ying, Zhang Zhichao, Study on the Mechanism of Cavitation and Pressure Pulsation in Axial Flow Pumps under Unsteady Operating Conditions. Journal of Engineering Mechanics and Machinery (2024) Vol. 9: 79-92. DOI: http://dx.doi.org/10.23977/jemm.2024.090310.

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