Sediment Erosion Characteristics and Mechanism on Guide Vane End-Clearance of Hydro Turbine
Sediment erosion caused by the collision of solid particles is a challenge for the safety, reliability, unit efficiency, and vibration noise of the hydroelectric engineering system located at China’s Yellow River and northwest inland basin. The sediment-laden flow of the guide vane end-cle...
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MDPI AG
2019-10-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/9/19/4137 |
| _version_ | 1818298184328282112 |
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| author | Yu Chen Rennian Li Wei Han Tao Guo Min Su Sanze Wei |
| author_facet | Yu Chen Rennian Li Wei Han Tao Guo Min Su Sanze Wei |
| author_sort | Yu Chen |
| collection | DOAJ |
| description | Sediment erosion caused by the collision of solid particles is a challenge for the safety, reliability, unit efficiency, and vibration noise of the hydroelectric engineering system located at China’s Yellow River and northwest inland basin. The sediment-laden flow of the guide vane end-clearance of the Francis Turbine at Dongshuixia hydroelectric station was used as the research object, and the large eccentric shaft structure of a guide vane was considered. Numerical calculations with the large eddy simulation (LES) and discrete phase models (DPMs) were carried out to study the erosion characteristics and mechanism of the end-surface of the guide vane and head cover, the flow mechanism of adverse erosion behind the shaft, and the influence law of the turbulence integral scale, turbulent kinetic energy, and turbulent flow angle on erosion. The flow field with a 1 mm clearance should set the number of particle trajectory per unit inlet area at about 1/mm<sup>2</sup> to ensure the accuracy of calculation. The von Kármán vortex street is the main reason for adverse erosion behind the shaft and the low frequency energy of the turbulence plays a leading role in erosion. The above results provide a reference for the optimization design of an anti-wear guide vane and wear-protection of the clearance with sediment-laden water. |
| first_indexed | 2024-12-13T04:31:17Z |
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| id | doaj.art-1454e67813884f7d9d42765af64e0df6 |
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| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-13T04:31:17Z |
| publishDate | 2019-10-01 |
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| spelling | doaj.art-1454e67813884f7d9d42765af64e0df62022-12-21T23:59:31ZengMDPI AGApplied Sciences2076-34172019-10-01919413710.3390/app9194137app9194137Sediment Erosion Characteristics and Mechanism on Guide Vane End-Clearance of Hydro TurbineYu Chen0Rennian Li1Wei Han2Tao Guo3Min Su4Sanze Wei5Lanzhou University of Technology, College of Energy and Power Engineering, Lanzhou 730050, ChinaLanzhou University of Technology, College of Energy and Power Engineering, Lanzhou 730050, ChinaLanzhou University of Technology, College of Energy and Power Engineering, Lanzhou 730050, ChinaLanzhou University of Technology, College of Energy and Power Engineering, Lanzhou 730050, ChinaLanzhou University of Technology, College of Electrical and Information Engineering, Lanzhou 730050, ChinaGansu Shengyu Water Conservancy and Hydropower Technology Co. Ltd., Lanzhou 730090, ChinaSediment erosion caused by the collision of solid particles is a challenge for the safety, reliability, unit efficiency, and vibration noise of the hydroelectric engineering system located at China’s Yellow River and northwest inland basin. The sediment-laden flow of the guide vane end-clearance of the Francis Turbine at Dongshuixia hydroelectric station was used as the research object, and the large eccentric shaft structure of a guide vane was considered. Numerical calculations with the large eddy simulation (LES) and discrete phase models (DPMs) were carried out to study the erosion characteristics and mechanism of the end-surface of the guide vane and head cover, the flow mechanism of adverse erosion behind the shaft, and the influence law of the turbulence integral scale, turbulent kinetic energy, and turbulent flow angle on erosion. The flow field with a 1 mm clearance should set the number of particle trajectory per unit inlet area at about 1/mm<sup>2</sup> to ensure the accuracy of calculation. The von Kármán vortex street is the main reason for adverse erosion behind the shaft and the low frequency energy of the turbulence plays a leading role in erosion. The above results provide a reference for the optimization design of an anti-wear guide vane and wear-protection of the clearance with sediment-laden water.https://www.mdpi.com/2076-3417/9/19/4137sediment erosionsolid particleguide vane end-clearanceturbulent characteristics |
| spellingShingle | Yu Chen Rennian Li Wei Han Tao Guo Min Su Sanze Wei Sediment Erosion Characteristics and Mechanism on Guide Vane End-Clearance of Hydro Turbine Applied Sciences sediment erosion solid particle guide vane end-clearance turbulent characteristics |
| title | Sediment Erosion Characteristics and Mechanism on Guide Vane End-Clearance of Hydro Turbine |
| title_full | Sediment Erosion Characteristics and Mechanism on Guide Vane End-Clearance of Hydro Turbine |
| title_fullStr | Sediment Erosion Characteristics and Mechanism on Guide Vane End-Clearance of Hydro Turbine |
| title_full_unstemmed | Sediment Erosion Characteristics and Mechanism on Guide Vane End-Clearance of Hydro Turbine |
| title_short | Sediment Erosion Characteristics and Mechanism on Guide Vane End-Clearance of Hydro Turbine |
| title_sort | sediment erosion characteristics and mechanism on guide vane end clearance of hydro turbine |
| topic | sediment erosion solid particle guide vane end-clearance turbulent characteristics |
| url | https://www.mdpi.com/2076-3417/9/19/4137 |
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