Experimental Study on the Effect of Gas Volume Fraction on the Cavitation Performance of a Low-Specific-Speed Centrifugal Pump
In order to study the cavitation performance of centrifugal pumps with low specific speeds under the condition of gas–liquid two-phase flow, a cavitation test rig for pumping gas–liquid two-phase flow was set up. The cavitation performance of the pump with a specific speed of 32 was studied. The var...
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MDPI AG
2022-03-01
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| Online Access: | https://www.mdpi.com/2073-4441/14/5/798 |
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| author | Linglin Jiang Houlin Liu Yong Wang Yanhong Mao Runze Zhou Jianbin Gu |
| author_facet | Linglin Jiang Houlin Liu Yong Wang Yanhong Mao Runze Zhou Jianbin Gu |
| author_sort | Linglin Jiang |
| collection | DOAJ |
| description | In order to study the cavitation performance of centrifugal pumps with low specific speeds under the condition of gas–liquid two-phase flow, a cavitation test rig for pumping gas–liquid two-phase flow was set up. The cavitation performance of the pump with a specific speed of 32 was studied. The variation of the head, pressure pulsation intensity, and vibration intensity with the cavitation allowance <i>NPSH</i><sub>a</sub> (Net Positive Suction Head available) of the centrifugal pump were obtained at different inlet gas volume fraction (IGVF) conditions of 0, 1%, 2%, and 3%. The results show that the cavitation performance of a low-specific-speed centrifugal pump can be improved obviously in a certain liquid flow range when the IGVF is 1%, especially at a low liquid flow rate. When cavitation did not occur or the degree of cavitation was low, a lower IGVF can reduce pressure pulsation intensity at the pump outlet and the vibration intensity at the pump inlet under design flow rate and high flow rate conditions. Additionally, all performances of the low-specific-speed pump are more sensitive to gas when the liquid flow rate is low. The results can provide a reference for improving the cavitation performance of low-specific-speed pumps for transporting gas–liquid two-phase flow and single-phase liquids. |
| first_indexed | 2024-03-09T20:14:44Z |
| format | Article |
| id | doaj.art-988d1e35ddb0403a918e206ea234b752 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-09T20:14:44Z |
| publishDate | 2022-03-01 |
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| spelling | doaj.art-988d1e35ddb0403a918e206ea234b7522023-11-24T00:03:27ZengMDPI AGWater2073-44412022-03-0114579810.3390/w14050798Experimental Study on the Effect of Gas Volume Fraction on the Cavitation Performance of a Low-Specific-Speed Centrifugal PumpLinglin Jiang0Houlin Liu1Yong Wang2Yanhong Mao3Runze Zhou4Jianbin Gu5Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, ChinaResearch Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, ChinaResearch Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, ChinaResearch Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, ChinaResearch Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, ChinaResearch Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, ChinaIn order to study the cavitation performance of centrifugal pumps with low specific speeds under the condition of gas–liquid two-phase flow, a cavitation test rig for pumping gas–liquid two-phase flow was set up. The cavitation performance of the pump with a specific speed of 32 was studied. The variation of the head, pressure pulsation intensity, and vibration intensity with the cavitation allowance <i>NPSH</i><sub>a</sub> (Net Positive Suction Head available) of the centrifugal pump were obtained at different inlet gas volume fraction (IGVF) conditions of 0, 1%, 2%, and 3%. The results show that the cavitation performance of a low-specific-speed centrifugal pump can be improved obviously in a certain liquid flow range when the IGVF is 1%, especially at a low liquid flow rate. When cavitation did not occur or the degree of cavitation was low, a lower IGVF can reduce pressure pulsation intensity at the pump outlet and the vibration intensity at the pump inlet under design flow rate and high flow rate conditions. Additionally, all performances of the low-specific-speed pump are more sensitive to gas when the liquid flow rate is low. The results can provide a reference for improving the cavitation performance of low-specific-speed pumps for transporting gas–liquid two-phase flow and single-phase liquids.https://www.mdpi.com/2073-4441/14/5/798centrifugal pump with low specific speedgas–liquid two-phase flowcavitationcavitation performanceexperiment research |
| spellingShingle | Linglin Jiang Houlin Liu Yong Wang Yanhong Mao Runze Zhou Jianbin Gu Experimental Study on the Effect of Gas Volume Fraction on the Cavitation Performance of a Low-Specific-Speed Centrifugal Pump Water centrifugal pump with low specific speed gas–liquid two-phase flow cavitation cavitation performance experiment research |
| title | Experimental Study on the Effect of Gas Volume Fraction on the Cavitation Performance of a Low-Specific-Speed Centrifugal Pump |
| title_full | Experimental Study on the Effect of Gas Volume Fraction on the Cavitation Performance of a Low-Specific-Speed Centrifugal Pump |
| title_fullStr | Experimental Study on the Effect of Gas Volume Fraction on the Cavitation Performance of a Low-Specific-Speed Centrifugal Pump |
| title_full_unstemmed | Experimental Study on the Effect of Gas Volume Fraction on the Cavitation Performance of a Low-Specific-Speed Centrifugal Pump |
| title_short | Experimental Study on the Effect of Gas Volume Fraction on the Cavitation Performance of a Low-Specific-Speed Centrifugal Pump |
| title_sort | experimental study on the effect of gas volume fraction on the cavitation performance of a low specific speed centrifugal pump |
| topic | centrifugal pump with low specific speed gas–liquid two-phase flow cavitation cavitation performance experiment research |
| url | https://www.mdpi.com/2073-4441/14/5/798 |
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