Entropy Production Analysis of a Vertical Mixed-Flow Pump Device with Different Guide Vane Meridians
With the aim of investigating the influence of guide vane meridians on the external characteristics and internal flow field of the mixed-flow pump device, this research constructed seven guide vane meridians and applied computational fluid dynamic (CFD) and entropy production theory to investigate t...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-09-01
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| Series: | Entropy |
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| Online Access: | https://www.mdpi.com/1099-4300/24/10/1370 |
| _version_ | 1827650377936273408 |
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| author | Yanjun Li Yi Zhong Fan Meng Yunhao Zheng Danghang Sun |
| author_facet | Yanjun Li Yi Zhong Fan Meng Yunhao Zheng Danghang Sun |
| author_sort | Yanjun Li |
| collection | DOAJ |
| description | With the aim of investigating the influence of guide vane meridians on the external characteristics and internal flow field of the mixed-flow pump device, this research constructed seven guide vane meridians and applied computational fluid dynamic (CFD) and entropy production theory to investigate the spread of hydraulic loss in a mixed-flow pump. As observed, when the guide vane outlet diameter <i>D</i><sub>gvo</sub> decreased from 350 mm to 275 mm, the head and efficiency increased by 2.78% and 3.05% at 0.7 <i>Q</i><sub>des</sub>, respectively. At 1.3 <i>Q</i><sub>des</sub>, when <i>D</i><sub>gvo</sub> increased from 350 mm to 425 mm, the head and efficiency increased by 4.49% and 3.71%, respectively. At 0.7 <i>Q</i><sub>des</sub> and 1.0 <i>Q</i><sub>des</sub>, the entropy production of the guide vane increased with the increase of <i>D</i><sub>gvo</sub> due to flow separation. When <i>D</i><sub>gvo</sub> < 350 mm, at 1.0 <i>Q</i><sub>des</sub> and 1.3 <i>Q</i><sub>des</sub>, entropy production of the outlet channel increased as <i>D</i><sub>gvo</sub> decreased owing to the excessive flow rate, but at 0.7 <i>Q</i><sub>des</sub>, entropy production did not change much. When <i>D</i><sub>gvo</sub> > 350 mm, at 0.7 <i>Q</i><sub>des</sub> and 1.0 <i>Q</i><sub>des</sub>, due to the expansion of the channel section, the flow separation intensified, which resulted in an increase of the entropy production, but the entropy production decreased slightly at 1.3 <i>Q</i><sub>des</sub>. These results provide guidance for improving the efficiency of pumping stations. |
| first_indexed | 2024-03-09T20:15:24Z |
| format | Article |
| id | doaj.art-5388be63ece6462c8021157de3e1a69a |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-03-09T20:15:24Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj.art-5388be63ece6462c8021157de3e1a69a2023-11-24T00:02:31ZengMDPI AGEntropy1099-43002022-09-012410137010.3390/e24101370Entropy Production Analysis of a Vertical Mixed-Flow Pump Device with Different Guide Vane MeridiansYanjun Li0Yi Zhong1Fan Meng2Yunhao Zheng3Danghang Sun4Research 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, ChinaWith the aim of investigating the influence of guide vane meridians on the external characteristics and internal flow field of the mixed-flow pump device, this research constructed seven guide vane meridians and applied computational fluid dynamic (CFD) and entropy production theory to investigate the spread of hydraulic loss in a mixed-flow pump. As observed, when the guide vane outlet diameter <i>D</i><sub>gvo</sub> decreased from 350 mm to 275 mm, the head and efficiency increased by 2.78% and 3.05% at 0.7 <i>Q</i><sub>des</sub>, respectively. At 1.3 <i>Q</i><sub>des</sub>, when <i>D</i><sub>gvo</sub> increased from 350 mm to 425 mm, the head and efficiency increased by 4.49% and 3.71%, respectively. At 0.7 <i>Q</i><sub>des</sub> and 1.0 <i>Q</i><sub>des</sub>, the entropy production of the guide vane increased with the increase of <i>D</i><sub>gvo</sub> due to flow separation. When <i>D</i><sub>gvo</sub> < 350 mm, at 1.0 <i>Q</i><sub>des</sub> and 1.3 <i>Q</i><sub>des</sub>, entropy production of the outlet channel increased as <i>D</i><sub>gvo</sub> decreased owing to the excessive flow rate, but at 0.7 <i>Q</i><sub>des</sub>, entropy production did not change much. When <i>D</i><sub>gvo</sub> > 350 mm, at 0.7 <i>Q</i><sub>des</sub> and 1.0 <i>Q</i><sub>des</sub>, due to the expansion of the channel section, the flow separation intensified, which resulted in an increase of the entropy production, but the entropy production decreased slightly at 1.3 <i>Q</i><sub>des</sub>. These results provide guidance for improving the efficiency of pumping stations.https://www.mdpi.com/1099-4300/24/10/1370mixed-flow pump deviceguide vane meridiansentropy productionnumerical simulation |
| spellingShingle | Yanjun Li Yi Zhong Fan Meng Yunhao Zheng Danghang Sun Entropy Production Analysis of a Vertical Mixed-Flow Pump Device with Different Guide Vane Meridians Entropy mixed-flow pump device guide vane meridians entropy production numerical simulation |
| title | Entropy Production Analysis of a Vertical Mixed-Flow Pump Device with Different Guide Vane Meridians |
| title_full | Entropy Production Analysis of a Vertical Mixed-Flow Pump Device with Different Guide Vane Meridians |
| title_fullStr | Entropy Production Analysis of a Vertical Mixed-Flow Pump Device with Different Guide Vane Meridians |
| title_full_unstemmed | Entropy Production Analysis of a Vertical Mixed-Flow Pump Device with Different Guide Vane Meridians |
| title_short | Entropy Production Analysis of a Vertical Mixed-Flow Pump Device with Different Guide Vane Meridians |
| title_sort | entropy production analysis of a vertical mixed flow pump device with different guide vane meridians |
| topic | mixed-flow pump device guide vane meridians entropy production numerical simulation |
| url | https://www.mdpi.com/1099-4300/24/10/1370 |
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