Investigation of Tip Leakage Vortex Structure and Trajectory in a Centrifugal Pump with a New Omega Vortex Identification Method
Semi-open centrifugal pumps are widely used in various fields. However, the tip leakage vortex (TLV) has a malign effect on the impeller flow field. The structure and trajectory of a TLV under different discharge conditions were simulated and are discussed herein. Then, the characteristics of the TL...
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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/2076-3417/12/10/5270 |
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| author | Bing Qian Yinhui Cai Qiang Ding Daoli Zhao Weipeng Sun Like Wang |
| author_facet | Bing Qian Yinhui Cai Qiang Ding Daoli Zhao Weipeng Sun Like Wang |
| author_sort | Bing Qian |
| collection | DOAJ |
| description | Semi-open centrifugal pumps are widely used in various fields. However, the tip leakage vortex (TLV) has a malign effect on the impeller flow field. The structure and trajectory of a TLV under different discharge conditions were simulated and are discussed herein. Then, the characteristics of the TLV were analyzed using a new omega vortex identification method. The external characteristic and pressure fluctuation of the simulation and experiment were consistent. A secondary leakage vortex near the blade outlet was formed under the high-discharge condition. A leading-edge overflow phenomenon under the low-discharge condition and led to the formation of a reverse-flow vortex. The interface between the main flow and tip leakage flow moved toward the impeller upstream with decreased discharge. As a result, the peak of the entropy production curve moved upstream, and leading-edge overflow and reverse flow occurred. The tip leakage flow changed the blade pressure distribution, resulting in a decrease in the blade load. |
| first_indexed | 2024-03-10T03:22:28Z |
| format | Article |
| id | doaj.art-6ee3168e98e04885bb5991d41a9c57e0 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T03:22:28Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-6ee3168e98e04885bb5991d41a9c57e02023-11-23T10:00:12ZengMDPI AGApplied Sciences2076-34172022-05-011210527010.3390/app12105270Investigation of Tip Leakage Vortex Structure and Trajectory in a Centrifugal Pump with a New Omega Vortex Identification MethodBing Qian0Yinhui Cai1Qiang Ding2Daoli Zhao3Weipeng Sun4Like Wang5Chn Energy Dadu River Repair & Installation Co., Ltd., Leshan 614900, ChinaChn Energy Dadu River Repair & Installation Co., Ltd., Leshan 614900, ChinaChn Energy Dadu River Repair & Installation Co., Ltd., Leshan 614900, ChinaState Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Institute of Water Resources and Hydro-electric Engineering, Xi’an University of Technology, Xi’an 710048, ChinaState Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Institute of Water Resources and Hydro-electric Engineering, Xi’an University of Technology, Xi’an 710048, ChinaState Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Institute of Water Resources and Hydro-electric Engineering, Xi’an University of Technology, Xi’an 710048, ChinaSemi-open centrifugal pumps are widely used in various fields. However, the tip leakage vortex (TLV) has a malign effect on the impeller flow field. The structure and trajectory of a TLV under different discharge conditions were simulated and are discussed herein. Then, the characteristics of the TLV were analyzed using a new omega vortex identification method. The external characteristic and pressure fluctuation of the simulation and experiment were consistent. A secondary leakage vortex near the blade outlet was formed under the high-discharge condition. A leading-edge overflow phenomenon under the low-discharge condition and led to the formation of a reverse-flow vortex. The interface between the main flow and tip leakage flow moved toward the impeller upstream with decreased discharge. As a result, the peak of the entropy production curve moved upstream, and leading-edge overflow and reverse flow occurred. The tip leakage flow changed the blade pressure distribution, resulting in a decrease in the blade load.https://www.mdpi.com/2076-3417/12/10/5270centrifugal pumptip leakage flowvortex identificationtip leakage vortex trajectoryflow fieldentropy production |
| spellingShingle | Bing Qian Yinhui Cai Qiang Ding Daoli Zhao Weipeng Sun Like Wang Investigation of Tip Leakage Vortex Structure and Trajectory in a Centrifugal Pump with a New Omega Vortex Identification Method Applied Sciences centrifugal pump tip leakage flow vortex identification tip leakage vortex trajectory flow field entropy production |
| title | Investigation of Tip Leakage Vortex Structure and Trajectory in a Centrifugal Pump with a New Omega Vortex Identification Method |
| title_full | Investigation of Tip Leakage Vortex Structure and Trajectory in a Centrifugal Pump with a New Omega Vortex Identification Method |
| title_fullStr | Investigation of Tip Leakage Vortex Structure and Trajectory in a Centrifugal Pump with a New Omega Vortex Identification Method |
| title_full_unstemmed | Investigation of Tip Leakage Vortex Structure and Trajectory in a Centrifugal Pump with a New Omega Vortex Identification Method |
| title_short | Investigation of Tip Leakage Vortex Structure and Trajectory in a Centrifugal Pump with a New Omega Vortex Identification Method |
| title_sort | investigation of tip leakage vortex structure and trajectory in a centrifugal pump with a new omega vortex identification method |
| topic | centrifugal pump tip leakage flow vortex identification tip leakage vortex trajectory flow field entropy production |
| url | https://www.mdpi.com/2076-3417/12/10/5270 |
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