Numerical Study on Cavitating Flow-Induced Pressure Fluctuations in a Gerotor Pump

Peijian Zhou, Jiayi Cui, Gang Xiao (), Chun Xiang, Jiacheng Dai and Shuihua Zheng
Additional contact information
Peijian Zhou: College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
Jiayi Cui: College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, China
Gang Xiao: College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
Chun Xiang: School of Mechanical and Automotive Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China
Jiacheng Dai: College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
Shuihua Zheng: College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China

Energies, 2023, vol. 16, issue 21, 1-18

Abstract: Using the RNG k-ε turbulence model and a full cavitation model, this study numerically simulated cavitating flow-induced pressure fluctuations in a gerotor pump and analyzed the relationship between cavitating flow and pressure fluctuations. The results demonstrate that, as the inlet pressure decreases, the cavitation phenomenon in the gerotor pump intensifies, and the cavitation range in the rotor increases. Some of the vapor even spreads into the oil inlet groove, leading to high vapor content in the chamber that is in contact with the oil inlet groove. The pressure fluctuation characteristics of the flow field in the pump exhibit evident periodic changes. Under different cavitation conditions, the pressure fluctuation amplitude at the monitoring point decreases with increasing inlet pressure, whereas the main frequency of pressure fluctuation remains unaffected by cavitation conditions. The pressure fluctuation amplitude is the strongest at point O 1 of demarcation between the low-pressure and high-pressure zones in the chamber, and the volume between the oil inlet groove and the oil outlet groove serves as the main vibration source in the rotor pump. To ensure the stable and efficient operation of the gerotor pump, it is recommended to operate it at a larger NPSH.

Keywords: gerotor pump; cavitating flow; pressure fluctuation; unsteady flow; numerical simulation (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: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/16/21/7301/pdf (application/pdf)
https://www.mdpi.com/1996-1073/16/21/7301/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:16:y:2023:i:21:p:7301-:d:1269058

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().