Study on the Energy Loss Characteristics of Shaft Tubular Pump Device under Stall Conditions Based on the Entropy Production Method
This study aimed to reveal the energy loss characteristics of each part of the shaft tubular pump device (STPD) under stall conditions. Numerical simulations were conducted by using the SST <i>k-ω</i> turbulence model with curvature correction, and the reliability of the simulation resul...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-07-01
|
| Series: | Journal of Marine Science and Engineering |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-1312/11/8/1512 |
| _version_ | 1797584288184532992 |
|---|---|
| author | Dongtao Ji Weigang Lu Bo Xu Lei Xu Tao Jiang |
| author_facet | Dongtao Ji Weigang Lu Bo Xu Lei Xu Tao Jiang |
| author_sort | Dongtao Ji |
| collection | DOAJ |
| description | This study aimed to reveal the energy loss characteristics of each part of the shaft tubular pump device (STPD) under stall conditions. Numerical simulations were conducted by using the SST <i>k-ω</i> turbulence model with curvature correction, and the reliability of the simulation results was verified by a model test. The entropy production method was used to evaluate and visualize the energy loss. The results show that turbulent entropy production (TEP) is the main source of energy loss in each component of the STPD, and the TEP increases significantly with the deterioration of stall. The energy loss in the impeller is mainly concentrated near the shroud and hub, while in the guide vanes it is mainly concentrated near the shroud and suction surface of the blades. In addition, with the deterioration of stall, the energy loss in the inlet of the impeller and guide vanes increases significantly. Influenced by the backflow from the impeller, there is a significant amount of energy loss at the outlet segment of the inlet passage, and the location of the high-energy-loss region is consistent with the backflow region. Affected by the flow separation vortex at the tail of the guide vanes, the energy loss in the outlet passage is mainly concentrated at the inlet segment. |
| first_indexed | 2024-03-10T23:49:44Z |
| format | Article |
| id | doaj.art-a785fd4c3c1a4cd98c1dd5164bfe084b |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-10T23:49:44Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-a785fd4c3c1a4cd98c1dd5164bfe084b2023-11-19T01:45:06ZengMDPI AGJournal of Marine Science and Engineering2077-13122023-07-01118151210.3390/jmse11081512Study on the Energy Loss Characteristics of Shaft Tubular Pump Device under Stall Conditions Based on the Entropy Production MethodDongtao Ji0Weigang Lu1Bo Xu2Lei Xu3Tao Jiang4College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, ChinaCollege of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, ChinaCollege of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, ChinaCollege of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, ChinaCollege of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, ChinaThis study aimed to reveal the energy loss characteristics of each part of the shaft tubular pump device (STPD) under stall conditions. Numerical simulations were conducted by using the SST <i>k-ω</i> turbulence model with curvature correction, and the reliability of the simulation results was verified by a model test. The entropy production method was used to evaluate and visualize the energy loss. The results show that turbulent entropy production (TEP) is the main source of energy loss in each component of the STPD, and the TEP increases significantly with the deterioration of stall. The energy loss in the impeller is mainly concentrated near the shroud and hub, while in the guide vanes it is mainly concentrated near the shroud and suction surface of the blades. In addition, with the deterioration of stall, the energy loss in the inlet of the impeller and guide vanes increases significantly. Influenced by the backflow from the impeller, there is a significant amount of energy loss at the outlet segment of the inlet passage, and the location of the high-energy-loss region is consistent with the backflow region. Affected by the flow separation vortex at the tail of the guide vanes, the energy loss in the outlet passage is mainly concentrated at the inlet segment.https://www.mdpi.com/2077-1312/11/8/1512shaft tubular pump deviceenergy loss characteristicsentropy productionnumerical simulationmodel test |
| spellingShingle | Dongtao Ji Weigang Lu Bo Xu Lei Xu Tao Jiang Study on the Energy Loss Characteristics of Shaft Tubular Pump Device under Stall Conditions Based on the Entropy Production Method Journal of Marine Science and Engineering shaft tubular pump device energy loss characteristics entropy production numerical simulation model test |
| title | Study on the Energy Loss Characteristics of Shaft Tubular Pump Device under Stall Conditions Based on the Entropy Production Method |
| title_full | Study on the Energy Loss Characteristics of Shaft Tubular Pump Device under Stall Conditions Based on the Entropy Production Method |
| title_fullStr | Study on the Energy Loss Characteristics of Shaft Tubular Pump Device under Stall Conditions Based on the Entropy Production Method |
| title_full_unstemmed | Study on the Energy Loss Characteristics of Shaft Tubular Pump Device under Stall Conditions Based on the Entropy Production Method |
| title_short | Study on the Energy Loss Characteristics of Shaft Tubular Pump Device under Stall Conditions Based on the Entropy Production Method |
| title_sort | study on the energy loss characteristics of shaft tubular pump device under stall conditions based on the entropy production method |
| topic | shaft tubular pump device energy loss characteristics entropy production numerical simulation model test |
| url | https://www.mdpi.com/2077-1312/11/8/1512 |
| work_keys_str_mv | AT dongtaoji studyontheenergylosscharacteristicsofshafttubularpumpdeviceunderstallconditionsbasedontheentropyproductionmethod AT weiganglu studyontheenergylosscharacteristicsofshafttubularpumpdeviceunderstallconditionsbasedontheentropyproductionmethod AT boxu studyontheenergylosscharacteristicsofshafttubularpumpdeviceunderstallconditionsbasedontheentropyproductionmethod AT leixu studyontheenergylosscharacteristicsofshafttubularpumpdeviceunderstallconditionsbasedontheentropyproductionmethod AT taojiang studyontheenergylosscharacteristicsofshafttubularpumpdeviceunderstallconditionsbasedontheentropyproductionmethod |