Numerical Study of Unsteady Pressure Fluctuation at Impeller Outlet of a Centrifugal Pump
Intense fluid-dynamic interaction at the impeller outlet strongly affects the unsteady flow and pressure stability within the centrifugal pump. In order to have a better understanding of the pressure fluctuation of centrifugal pumps, a numerical calculation is carried out by using the RNG k-epsilon...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Science and Technology of Nuclear Installations |
| Online Access: | http://dx.doi.org/10.1155/2022/1758382 |
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| _version_ | 1849397932642533376 |
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| author | Xiaojie Ma Lulu Zheng Jinglei Qu Mengmeng Wang |
| author_facet | Xiaojie Ma Lulu Zheng Jinglei Qu Mengmeng Wang |
| author_sort | Xiaojie Ma |
| collection | DOAJ |
| description | Intense fluid-dynamic interaction at the impeller outlet strongly affects the unsteady flow and pressure stability within the centrifugal pump. In order to have a better understanding of the pressure fluctuation of centrifugal pumps, a numerical calculation is carried out by using the RNG k-epsilon turbulence model under various flow rates. The numerical calculation results are compared with the experimental results in order to verify the reliability of the calculation model. The amplitude and frequency distribution of pressure fluctuation at the impeller outlet is obtained and analyzed in the time and frequency domain. The research results show that the blade passing frequency is the dominant frequency of the pressure fluctuation. And the pressure fluctuation is a periodic fluctuation. As the flow rate decreases, the periodicity of the pressure fluctuation decreases. Besides, the amplitude and intensity of pressure fluctuation are closely related to flow rate and spatial location. At the low flow rate, the amplitude of pressure fluctuation in the time domain and frequency domain is enlarged greatly, especially near the tongue region. The pressure difference distribution on both sides of the blade surface is extremely uneven, and the pressure changes significantly. |
| format | Article |
| id | doaj-art-a7f76265326d4e8f860e09a04d166792 |
| institution | Kabale University |
| issn | 1687-6083 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Science and Technology of Nuclear Installations |
| spelling | doaj-art-a7f76265326d4e8f860e09a04d1667922025-08-20T03:38:48ZengWileyScience and Technology of Nuclear Installations1687-60832022-01-01202210.1155/2022/1758382Numerical Study of Unsteady Pressure Fluctuation at Impeller Outlet of a Centrifugal PumpXiaojie Ma0Lulu Zheng1Jinglei Qu2Mengmeng Wang3Faculty of Mechanical EngineeringFaculty of Mechanical EngineeringFaculty of Mechanical EngineeringFaculty of Mechanical EngineeringIntense fluid-dynamic interaction at the impeller outlet strongly affects the unsteady flow and pressure stability within the centrifugal pump. In order to have a better understanding of the pressure fluctuation of centrifugal pumps, a numerical calculation is carried out by using the RNG k-epsilon turbulence model under various flow rates. The numerical calculation results are compared with the experimental results in order to verify the reliability of the calculation model. The amplitude and frequency distribution of pressure fluctuation at the impeller outlet is obtained and analyzed in the time and frequency domain. The research results show that the blade passing frequency is the dominant frequency of the pressure fluctuation. And the pressure fluctuation is a periodic fluctuation. As the flow rate decreases, the periodicity of the pressure fluctuation decreases. Besides, the amplitude and intensity of pressure fluctuation are closely related to flow rate and spatial location. At the low flow rate, the amplitude of pressure fluctuation in the time domain and frequency domain is enlarged greatly, especially near the tongue region. The pressure difference distribution on both sides of the blade surface is extremely uneven, and the pressure changes significantly.http://dx.doi.org/10.1155/2022/1758382 |
| spellingShingle | Xiaojie Ma Lulu Zheng Jinglei Qu Mengmeng Wang Numerical Study of Unsteady Pressure Fluctuation at Impeller Outlet of a Centrifugal Pump Science and Technology of Nuclear Installations |
| title | Numerical Study of Unsteady Pressure Fluctuation at Impeller Outlet of a Centrifugal Pump |
| title_full | Numerical Study of Unsteady Pressure Fluctuation at Impeller Outlet of a Centrifugal Pump |
| title_fullStr | Numerical Study of Unsteady Pressure Fluctuation at Impeller Outlet of a Centrifugal Pump |
| title_full_unstemmed | Numerical Study of Unsteady Pressure Fluctuation at Impeller Outlet of a Centrifugal Pump |
| title_short | Numerical Study of Unsteady Pressure Fluctuation at Impeller Outlet of a Centrifugal Pump |
| title_sort | numerical study of unsteady pressure fluctuation at impeller outlet of a centrifugal pump |
| url | http://dx.doi.org/10.1155/2022/1758382 |
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