The optimization of j-groove shape in the draft tube of a francis turbine to suppress the draft surge
Suppression of draft surge caused by vortex and cavitation surge in the draft tube is very important to improve the turbine performance when the turbine is operated in the range of partial load condition. In present work, a series of CFD analysis have been conducted in the range of partial load, des...
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| Veröffentlicht in: | IOP conference series. Materials Science and Engineering 2013-01, Vol.52 (5), p.52030-6 |
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| creator | Wei, Q S Choi, Y D |
| description | Suppression of draft surge caused by vortex and cavitation surge in the draft tube is very important to improve the turbine performance when the turbine is operated in the range of partial load condition. In present work, a series of CFD analysis have been conducted in the range of partial load, design condition and over load of a Francis turbine model with a kind of J-Grooves. The pressure contours, circumferential velocity vectors and vortex core regions in the draft tube are compared by the conditions with or without J-Grooves. Study results show that the J-Grooves can suppress the abnormal phenomena to some extents on the condition of maintaining the efficiency. In the second stage, the shape of J-Groove is optimized step by step considering the groove length, depth and width normalized by the diameter of outlet of turbine runner. |
| doi_str_mv | 10.1088/1757-899X/52/5/052030 |
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In present work, a series of CFD analysis have been conducted in the range of partial load, design condition and over load of a Francis turbine model with a kind of J-Grooves. The pressure contours, circumferential velocity vectors and vortex core regions in the draft tube are compared by the conditions with or without J-Grooves. Study results show that the J-Grooves can suppress the abnormal phenomena to some extents on the condition of maintaining the efficiency. 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In the second stage, the shape of J-Groove is optimized step by step considering the groove length, depth and width normalized by the diameter of outlet of turbine runner.</description><subject>Cavitation</subject><subject>Diameters</subject><subject>Draft tubes</subject><subject>Fluid flow</subject><subject>Grooves</subject><subject>Mathematical analysis</subject><subject>Optimization</subject><subject>Outlets</subject><subject>Surges</subject><subject>Turbines</subject><subject>Vortices</subject><issn>1757-8981</issn><issn>1757-899X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpdkF1LwzAUhoMoOKc_QQh4401tvpteyvALBt5M8C6kabJlbE1NUkF_vS2TIV6dw3seXg4PANcY3WEkZYkrXhWyrt9LTkpeIk4QRSdgdsxPj7vE5-AipS1ComIMzYBdbSwMffZ7_62zDx0MDm6LdQzh08K00b2FvoN5pNqoXYZ5aOzEaOii7oxPYxIb31mYA0xD30eb0h8-DXFtL8GZ07tkr37nHLw9PqwWz8Xy9ellcb8sDBU4F0S3ThgnG2kq02ApasyYodJwhlprjKOIWYpa0VLCGq4JNZZh02JU8fHc0Dm4PfT2MXwMNmW198nY3U53NgxJ4UoQNLZKPqI3_9BtGGI3fqcIFwzXiGIxUvxAmRhSitapPvq9jl8KIzXJV5NYNUlWnCiuDvLpD3vfeKA</recordid><startdate>20130101</startdate><enddate>20130101</enddate><creator>Wei, Q S</creator><creator>Choi, Y D</creator><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>L6V</scope><scope>M7S</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>7SR</scope><scope>7TB</scope><scope>8BQ</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>JG9</scope><scope>KR7</scope><scope>L7M</scope></search><sort><creationdate>20130101</creationdate><title>The optimization of j-groove shape in the draft tube of a francis turbine to suppress the draft surge</title><author>Wei, Q S ; Choi, Y D</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c361t-2adf6cf8b8c7cb1869144c38c540deccf304e30d6d324b5a23ce41cd1075eccb3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Cavitation</topic><topic>Diameters</topic><topic>Draft tubes</topic><topic>Fluid flow</topic><topic>Grooves</topic><topic>Mathematical analysis</topic><topic>Optimization</topic><topic>Outlets</topic><topic>Surges</topic><topic>Turbines</topic><topic>Vortices</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wei, Q S</creatorcontrib><creatorcontrib>Choi, Y D</creatorcontrib><collection>CrossRef</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection (ProQuest)</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>Materials Science Database</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Materials Science Collection</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><collection>Engineered Materials Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>IOP conference series. 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| subjects | Cavitation Diameters Draft tubes Fluid flow Grooves Mathematical analysis Optimization Outlets Surges Turbines Vortices |
| title | The optimization of j-groove shape in the draft tube of a francis turbine to suppress the draft surge |
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