Numerical Study on Cavitating Flow-Induced Pressure Fluctuations in a Gerotor Pump
Using the RNG <i>k-ε</i> 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 in...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-10-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/21/7301 |
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| author | Peijian Zhou Jiayi Cui Gang Xiao Chun Xiang Jiacheng Dai Shuihua Zheng |
| author_facet | Peijian Zhou Jiayi Cui Gang Xiao Chun Xiang Jiacheng Dai Shuihua Zheng |
| author_sort | Peijian Zhou |
| collection | DOAJ |
| description | Using the RNG <i>k-ε</i> 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 <i>O</i><sub>1</sub> 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. |
| first_indexed | 2024-03-11T11:30:47Z |
| format | Article |
| id | doaj.art-78289d69cb3f496f83c7940ebe7c5e50 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-11T11:30:47Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-78289d69cb3f496f83c7940ebe7c5e502023-11-10T15:02:07ZengMDPI AGEnergies1996-10732023-10-011621730110.3390/en16217301Numerical Study on Cavitating Flow-Induced Pressure Fluctuations in a Gerotor PumpPeijian Zhou0Jiayi Cui1Gang Xiao2Chun Xiang3Jiacheng Dai4Shuihua Zheng5College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaCollege of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, ChinaCollege of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaSchool of Mechanical and Automotive Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, ChinaCollege of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaCollege of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaUsing the RNG <i>k-ε</i> 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 <i>O</i><sub>1</sub> 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.https://www.mdpi.com/1996-1073/16/21/7301gerotor pumpcavitating flowpressure fluctuationunsteady flownumerical simulation |
| spellingShingle | Peijian Zhou Jiayi Cui Gang Xiao Chun Xiang Jiacheng Dai Shuihua Zheng Numerical Study on Cavitating Flow-Induced Pressure Fluctuations in a Gerotor Pump Energies gerotor pump cavitating flow pressure fluctuation unsteady flow numerical simulation |
| title | Numerical Study on Cavitating Flow-Induced Pressure Fluctuations in a Gerotor Pump |
| title_full | Numerical Study on Cavitating Flow-Induced Pressure Fluctuations in a Gerotor Pump |
| title_fullStr | Numerical Study on Cavitating Flow-Induced Pressure Fluctuations in a Gerotor Pump |
| title_full_unstemmed | Numerical Study on Cavitating Flow-Induced Pressure Fluctuations in a Gerotor Pump |
| title_short | Numerical Study on Cavitating Flow-Induced Pressure Fluctuations in a Gerotor Pump |
| title_sort | numerical study on cavitating flow induced pressure fluctuations in a gerotor pump |
| topic | gerotor pump cavitating flow pressure fluctuation unsteady flow numerical simulation |
| url | https://www.mdpi.com/1996-1073/16/21/7301 |
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