Influence of Internal Flow on the Performance of High-Speed Centrifugal Pumps with a Fully Sealed Structure
A high-speed centrifugal pump with a fully sealed structure has the advantages of a small size, no external leakage, and being pollution-free. The inner leakage passage of a pump with a fully sealed structure includes the tip clearance and the hub clearance. The hub clearance, the lubrication passag...
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| Format: | Article |
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MDPI AG
2022-05-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/10/5263 |
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| author | Xinyi Lin Beile Zhang Ming Zhang Yongli Zhao Tianwei Lai Liang Chen Rong Xue |
| author_facet | Xinyi Lin Beile Zhang Ming Zhang Yongli Zhao Tianwei Lai Liang Chen Rong Xue |
| author_sort | Xinyi Lin |
| collection | DOAJ |
| description | A high-speed centrifugal pump with a fully sealed structure has the advantages of a small size, no external leakage, and being pollution-free. The inner leakage passage of a pump with a fully sealed structure includes the tip clearance and the hub clearance. The hub clearance, the lubrication passage of the bearing, and the clearance between the stator and the rotor of the built-in motor constitute the internal flow channel. As a consequence of hub leakage, the complexity of the flow field increases and performance of the pump is affected. However, hub leakage also lubricates the bearing and cools the motor by flowing through the internal flow channel. To obtain the actual flow field distribution and external characteristics of the pump, a coupling calculation based on a conventional CFX simulation and MATLAB was carried out. The results show that hub leakage promotes an increase in tip leakage and changes the distribution of the main flow field. Moreover, hub leakage also significantly affects the efficiency of the pump. Compared with hub leakage, the internal flow has a greater impact on the performance of the pump. The numerical simulation results of the internal flow model are similar to the experimental results, with the maximum absolute error of the head at 0.3 m and the maximum absolute error of the efficiency at 1.7%, indicating that the internal flow model is effective at predicting the performance of the high-speed centrifugal pump with a fully sealed structure. |
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| id | doaj.art-5413269c7fba4fa8bc2bc4e060dd2bdd |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T03:22:22Z |
| publishDate | 2022-05-01 |
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| spelling | doaj.art-5413269c7fba4fa8bc2bc4e060dd2bdd2023-11-23T10:00:06ZengMDPI AGApplied Sciences2076-34172022-05-011210526310.3390/app12105263Influence of Internal Flow on the Performance of High-Speed Centrifugal Pumps with a Fully Sealed StructureXinyi Lin0Beile Zhang1Ming Zhang2Yongli Zhao3Tianwei Lai4Liang Chen5Rong Xue6School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaSchool of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaAerospace System Engineering Shanghai, Shanghai 201109, ChinaAerospace System Engineering Shanghai, Shanghai 201109, ChinaSchool of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaSchool of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaSchool of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaA high-speed centrifugal pump with a fully sealed structure has the advantages of a small size, no external leakage, and being pollution-free. The inner leakage passage of a pump with a fully sealed structure includes the tip clearance and the hub clearance. The hub clearance, the lubrication passage of the bearing, and the clearance between the stator and the rotor of the built-in motor constitute the internal flow channel. As a consequence of hub leakage, the complexity of the flow field increases and performance of the pump is affected. However, hub leakage also lubricates the bearing and cools the motor by flowing through the internal flow channel. To obtain the actual flow field distribution and external characteristics of the pump, a coupling calculation based on a conventional CFX simulation and MATLAB was carried out. The results show that hub leakage promotes an increase in tip leakage and changes the distribution of the main flow field. Moreover, hub leakage also significantly affects the efficiency of the pump. Compared with hub leakage, the internal flow has a greater impact on the performance of the pump. The numerical simulation results of the internal flow model are similar to the experimental results, with the maximum absolute error of the head at 0.3 m and the maximum absolute error of the efficiency at 1.7%, indicating that the internal flow model is effective at predicting the performance of the high-speed centrifugal pump with a fully sealed structure.https://www.mdpi.com/2076-3417/12/10/5263centrifugal pumpinternal leakagecfd simulationcoupling calculation |
| spellingShingle | Xinyi Lin Beile Zhang Ming Zhang Yongli Zhao Tianwei Lai Liang Chen Rong Xue Influence of Internal Flow on the Performance of High-Speed Centrifugal Pumps with a Fully Sealed Structure Applied Sciences centrifugal pump internal leakage cfd simulation coupling calculation |
| title | Influence of Internal Flow on the Performance of High-Speed Centrifugal Pumps with a Fully Sealed Structure |
| title_full | Influence of Internal Flow on the Performance of High-Speed Centrifugal Pumps with a Fully Sealed Structure |
| title_fullStr | Influence of Internal Flow on the Performance of High-Speed Centrifugal Pumps with a Fully Sealed Structure |
| title_full_unstemmed | Influence of Internal Flow on the Performance of High-Speed Centrifugal Pumps with a Fully Sealed Structure |
| title_short | Influence of Internal Flow on the Performance of High-Speed Centrifugal Pumps with a Fully Sealed Structure |
| title_sort | influence of internal flow on the performance of high speed centrifugal pumps with a fully sealed structure |
| topic | centrifugal pump internal leakage cfd simulation coupling calculation |
| url | https://www.mdpi.com/2076-3417/12/10/5263 |
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