Numerical simulation of multiphase flow and prediction of sediment wear in a large Pelton turbine
Abstract The problem of sediment wear presents a significant challenge for hydraulic turbines operating in sediment‐rich rivers, particularly for high‐head Pelton turbines. In this study, the VOF model, SST k–ω model, and DPM model were employed to simulate the gas–liquid–solid three‐phase flow with...
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| Format: | Article |
| Language: | English |
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Wiley
2024-11-01
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| Series: | Energy Science & Engineering |
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| Online Access: | https://doi.org/10.1002/ese3.1925 |
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| author | Mengjun Qin Zhishun Yu Baofu Wu Jiayang Pang Dengyun Jiang Haiku Zhang Jitao Liu Hong Hua Xiaobing Liu |
| author_facet | Mengjun Qin Zhishun Yu Baofu Wu Jiayang Pang Dengyun Jiang Haiku Zhang Jitao Liu Hong Hua Xiaobing Liu |
| author_sort | Mengjun Qin |
| collection | DOAJ |
| description | Abstract The problem of sediment wear presents a significant challenge for hydraulic turbines operating in sediment‐rich rivers, particularly for high‐head Pelton turbines. In this study, the VOF model, SST k–ω model, and DPM model were employed to simulate the gas–liquid–solid three‐phase flow within a large Pelton turbine, which operates under a rated water head of 671 m and has a single capacity of 500 MW, at a hydropower station situated on a sediment‐laden river. The sediment wear prediction model, derived from the sediment wear test of the model turbine, was utilized to forecast the sediment wear on the flow components of the Pelton turbine at the hydropower station. The results show that there are obvious pressure and velocity gradients near the nozzle outlet of the Pelton turbine in the power station, and the wear of the nozzle surface is gradually increasing, and the wear in the downstream area of the nozzle is more serious. The wear rate at the needle tip surface reached 1.372 μm/h, while the socket ring surface exhibited a wear rate of 3.175 μm/h. he highest wear rate recorded for the water bucket is 0.940 μm/h. After a year of continuous operation, the maximum erosion observed was 5.62 mm on the runner bucket made of stainless steel and wear‐resistant metal, 8.23 mm on the spray needle, and 19.05 mm on the nozzle mouth ring, highlighting the severity of sediment wear on the Pelton turbine. It is recommended that surface treatment technology be applied to the flow‐through components of the Pelton turbine at this hydropower station to enhance the wear resistance of the turbine and extend the operational life of the unit. |
| format | Article |
| id | doaj-art-45e86ceb9d5c4ebda3e6189f8af559c4 |
| institution | Kabale University |
| issn | 2050-0505 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Wiley |
| record_format | Article |
| series | Energy Science & Engineering |
| spelling | doaj-art-45e86ceb9d5c4ebda3e6189f8af559c42025-01-06T14:45:33ZengWileyEnergy Science & Engineering2050-05052024-11-0112115031504410.1002/ese3.1925Numerical simulation of multiphase flow and prediction of sediment wear in a large Pelton turbineMengjun Qin0Zhishun Yu1Baofu Wu2Jiayang Pang3Dengyun Jiang4Haiku Zhang5Jitao Liu6Hong Hua7Xiaobing Liu8Key Laboratory of Fluid and Power Machinery, Ministry of Education Xihua University Chengdu ChinaKey Laboratory of Fluid and Power Machinery, Ministry of Education Xihua University Chengdu ChinaDatang Hydropower Science & Technology Research Institute Co. Ltd Chengdu ChinaCollege of Water Resources and Civil Engineering China Agricultural University Beijing ChinaPower China Chengdu Engineering Co. Ltd Chengdu ChinaDatang Hydropower Science & Technology Research Institute Co. Ltd Chengdu ChinaKey Laboratory of Fluid and Power Machinery, Ministry of Education Xihua University Chengdu ChinaKey Laboratory of Fluid and Power Machinery, Ministry of Education Xihua University Chengdu ChinaKey Laboratory of Fluid and Power Machinery, Ministry of Education Xihua University Chengdu ChinaAbstract The problem of sediment wear presents a significant challenge for hydraulic turbines operating in sediment‐rich rivers, particularly for high‐head Pelton turbines. In this study, the VOF model, SST k–ω model, and DPM model were employed to simulate the gas–liquid–solid three‐phase flow within a large Pelton turbine, which operates under a rated water head of 671 m and has a single capacity of 500 MW, at a hydropower station situated on a sediment‐laden river. The sediment wear prediction model, derived from the sediment wear test of the model turbine, was utilized to forecast the sediment wear on the flow components of the Pelton turbine at the hydropower station. The results show that there are obvious pressure and velocity gradients near the nozzle outlet of the Pelton turbine in the power station, and the wear of the nozzle surface is gradually increasing, and the wear in the downstream area of the nozzle is more serious. The wear rate at the needle tip surface reached 1.372 μm/h, while the socket ring surface exhibited a wear rate of 3.175 μm/h. he highest wear rate recorded for the water bucket is 0.940 μm/h. After a year of continuous operation, the maximum erosion observed was 5.62 mm on the runner bucket made of stainless steel and wear‐resistant metal, 8.23 mm on the spray needle, and 19.05 mm on the nozzle mouth ring, highlighting the severity of sediment wear on the Pelton turbine. It is recommended that surface treatment technology be applied to the flow‐through components of the Pelton turbine at this hydropower station to enhance the wear resistance of the turbine and extend the operational life of the unit.https://doi.org/10.1002/ese3.1925large Pelton turbinemultiphase flownumerical simulationwear modelwear prediction |
| spellingShingle | Mengjun Qin Zhishun Yu Baofu Wu Jiayang Pang Dengyun Jiang Haiku Zhang Jitao Liu Hong Hua Xiaobing Liu Numerical simulation of multiphase flow and prediction of sediment wear in a large Pelton turbine Energy Science & Engineering large Pelton turbine multiphase flow numerical simulation wear model wear prediction |
| title | Numerical simulation of multiphase flow and prediction of sediment wear in a large Pelton turbine |
| title_full | Numerical simulation of multiphase flow and prediction of sediment wear in a large Pelton turbine |
| title_fullStr | Numerical simulation of multiphase flow and prediction of sediment wear in a large Pelton turbine |
| title_full_unstemmed | Numerical simulation of multiphase flow and prediction of sediment wear in a large Pelton turbine |
| title_short | Numerical simulation of multiphase flow and prediction of sediment wear in a large Pelton turbine |
| title_sort | numerical simulation of multiphase flow and prediction of sediment wear in a large pelton turbine |
| topic | large Pelton turbine multiphase flow numerical simulation wear model wear prediction |
| url | https://doi.org/10.1002/ese3.1925 |
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