An Analysis of the Effect of Cavitation on Rotor–Stator Interaction in a Bidirectional Bulb Tubular Pump
This study delves into rotor–stator interaction within a bidirectional bulb tubular pump under cavitation conditions. Using pressure pulsation tests on a model pump and numerical simulations performed with ANSYS CFX software, we analyzed pressure pulsation and flow field data across three distinct f...
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MDPI AG
2025-01-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/13/1/138 |
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| author | Yucheng Zhou Wenyong Duan Haiyu Liu Xiaodong Yang Jing Hu Dawang Sun Shikai Yan |
| author_facet | Yucheng Zhou Wenyong Duan Haiyu Liu Xiaodong Yang Jing Hu Dawang Sun Shikai Yan |
| author_sort | Yucheng Zhou |
| collection | DOAJ |
| description | This study delves into rotor–stator interaction within a bidirectional bulb tubular pump under cavitation conditions. Using pressure pulsation tests on a model pump and numerical simulations performed with ANSYS CFX software, we analyzed pressure pulsation and flow field data across three distinct flow rates and multiple cavitation numbers. Both time-domain and frequency-domain analyses were conducted to examine the patterns of pressure pulsation influenced by flow rates and cavitation numbers at various monitoring locations. A numerical flow field analysis further validated the findings. The results reveal that rotor–stator interaction manifests in the vaneless spaces of the pump during cavitation. The onset of cavitation alters the amplitudes of dominant frequencies at different flow rates. Near the guide vane and impeller, the dominant frequencies shift toward the impeller frequency and guide vane frequency, respectively. Under low-flow conditions, the rotor–stator interaction effect is more conspicuous due to the deteriorated flow pattern. Pressure pulsations are more strongly influenced in the front vaneless space (FVP) than in the rear vaneless space (RVP). This difference arises because the front guide vane destabilizes rather than stabilizes the flow pattern, worsening the rotor–stator interaction. Additionally, the FVP is less affected by the impeller than the RVP, further amplifying the influence of rotor–stator interaction on pressure pulsation. These findings provide a theoretical foundation for mitigating the effects of rotor–stator interaction on the operational stability and efficiency of bidirectional bulb tubular pumps. |
| format | Article |
| id | doaj-art-c3bb6b490600464d99986b00914a6b68 |
| institution | Kabale University |
| issn | 2077-1312 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj-art-c3bb6b490600464d99986b00914a6b682025-01-24T13:37:00ZengMDPI AGJournal of Marine Science and Engineering2077-13122025-01-0113113810.3390/jmse13010138An Analysis of the Effect of Cavitation on Rotor–Stator Interaction in a Bidirectional Bulb Tubular PumpYucheng Zhou0Wenyong Duan1Haiyu Liu2Xiaodong Yang3Jing Hu4Dawang Sun5Shikai Yan6School of Electrical Engineering, Yancheng Institute of Technology, Yancheng 224000, ChinaSchool of Electrical Engineering, Yancheng Institute of Technology, Yancheng 224000, ChinaSchool of Electrical Engineering, Yancheng Institute of Technology, Yancheng 224000, ChinaSchool of Electrical Engineering, Yancheng Institute of Technology, Yancheng 224000, ChinaThe Hongze Lake Water Conservancy Engineering Management Office, Huaian 223001, ChinaThe Hongze Lake Water Conservancy Engineering Management Office, Huaian 223001, ChinaNanjing Water Planning and Designing Institute Corp. Ltd., Nanjing 210022, ChinaThis study delves into rotor–stator interaction within a bidirectional bulb tubular pump under cavitation conditions. Using pressure pulsation tests on a model pump and numerical simulations performed with ANSYS CFX software, we analyzed pressure pulsation and flow field data across three distinct flow rates and multiple cavitation numbers. Both time-domain and frequency-domain analyses were conducted to examine the patterns of pressure pulsation influenced by flow rates and cavitation numbers at various monitoring locations. A numerical flow field analysis further validated the findings. The results reveal that rotor–stator interaction manifests in the vaneless spaces of the pump during cavitation. The onset of cavitation alters the amplitudes of dominant frequencies at different flow rates. Near the guide vane and impeller, the dominant frequencies shift toward the impeller frequency and guide vane frequency, respectively. Under low-flow conditions, the rotor–stator interaction effect is more conspicuous due to the deteriorated flow pattern. Pressure pulsations are more strongly influenced in the front vaneless space (FVP) than in the rear vaneless space (RVP). This difference arises because the front guide vane destabilizes rather than stabilizes the flow pattern, worsening the rotor–stator interaction. Additionally, the FVP is less affected by the impeller than the RVP, further amplifying the influence of rotor–stator interaction on pressure pulsation. These findings provide a theoretical foundation for mitigating the effects of rotor–stator interaction on the operational stability and efficiency of bidirectional bulb tubular pumps.https://www.mdpi.com/2077-1312/13/1/138bidirectional pumppressure pulsationcavitationrotor–stator interaction |
| spellingShingle | Yucheng Zhou Wenyong Duan Haiyu Liu Xiaodong Yang Jing Hu Dawang Sun Shikai Yan An Analysis of the Effect of Cavitation on Rotor–Stator Interaction in a Bidirectional Bulb Tubular Pump Journal of Marine Science and Engineering bidirectional pump pressure pulsation cavitation rotor–stator interaction |
| title | An Analysis of the Effect of Cavitation on Rotor–Stator Interaction in a Bidirectional Bulb Tubular Pump |
| title_full | An Analysis of the Effect of Cavitation on Rotor–Stator Interaction in a Bidirectional Bulb Tubular Pump |
| title_fullStr | An Analysis of the Effect of Cavitation on Rotor–Stator Interaction in a Bidirectional Bulb Tubular Pump |
| title_full_unstemmed | An Analysis of the Effect of Cavitation on Rotor–Stator Interaction in a Bidirectional Bulb Tubular Pump |
| title_short | An Analysis of the Effect of Cavitation on Rotor–Stator Interaction in a Bidirectional Bulb Tubular Pump |
| title_sort | analysis of the effect of cavitation on rotor stator interaction in a bidirectional bulb tubular pump |
| topic | bidirectional pump pressure pulsation cavitation rotor–stator interaction |
| url | https://www.mdpi.com/2077-1312/13/1/138 |
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