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Suppression of Swirl in a Conical Diffuser by Use of J-Groove
http://hdl.handle.net/10131/3769
http://hdl.handle.net/10131/3769a4017458-2cc9-49c8-b38b-a98a0cb542bf
名前 / ファイル | ライセンス | アクション |
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B-113.pdf (868.0 kB)
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Item type | 会議発表論文 / Conference Paper(1) | |||||
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公開日 | 2008-09-17 | |||||
タイトル | ||||||
タイトル | Suppression of Swirl in a Conical Diffuser by Use of J-Groove | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_5794 | |||||
資源タイプ | conference paper | |||||
著者 |
Kurokawa, Junichi
× Kurokawa, Junichi× Kajigaya, A.× Matsui, J.× Imamura, H. |
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著者(ヨミ) | ||||||
識別子Scheme | WEKO | |||||
識別子 | 181 | |||||
識別子Scheme | e-Rad | |||||
識別子URI | https://kaken.nii.ac.jp/ja/search/?qm=40017976 | |||||
識別子 | 40017976 | |||||
姓名 | クロカワ, ジュンイチ | |||||
著者別名 | ||||||
識別子Scheme | WEKO | |||||
識別子 | 181 | |||||
識別子Scheme | e-Rad | |||||
識別子URI | https://kaken.nii.ac.jp/ja/search/?qm=40017976 | |||||
識別子 | 40017976 | |||||
姓名 | 黒川, 淳一 | |||||
著者所属 | ||||||
Dept. of Mechanical Eng., Yokohama National University, Yokohama, Japan | ||||||
著者所属 | ||||||
Dept. of Mechanical Eng., Yokohama National University, Yokohama, Japan | ||||||
著者所属 | ||||||
Dept. of Mechanical Eng., Yokohama National University, Yokohama, Japan | ||||||
著者所属 | ||||||
Dept. of Mechanical Eng., Yokohama National University, Yokohama, Japan | ||||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | In order to control and suppress a draft tube surge in a Francis turbine, a new passive device using shallow grooves machined on a casing wall is proposed. To reveal the possibility and the effect of the present device on controlling and reducing the swirl strength of a runner outlet flow, a steady rotational flow in a conical diffuser of divergent angle of 30 is studied experimentally. The results show that the shallow grooves with adequate dimensions can reduce the swirl rate of the main flow by about 85% of the inlet swirl rate. The additional hydraulic loss is negligible and the static pressure becomes much uniform over the whole outlet section, though the range of the forced vortex core with reverse flow becomes larger around the center axis. The above considerable effect of shallow grooves is caused by the groove flow which is driven by the pressure gradient of the main flow. The flow loses the angular momentum when entering into the groove, and absorbs the angular momentum of the main flow by mixing when leaving from the groove. | |||||
書誌情報 |
Proceedings of 20th IAHR Symposium on Hydraulic Machinery and Systems, August 6th - 9th 2000, Charlotte, USA 発行日 2000 |
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フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
出版者 | ||||||
出版者 | International Association of Hydraulic Research (IAHR) |