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a20b2p18.pdf | 1.12 MB | Adobe PDF | 見る/開く |
タイトル: | 開水路断面変化部における流れの水理特性について (2)-水路幅急変部に関する実験的検討- |
その他のタイトル: | ON THE CHARACTERISTICS OF AN OPEN CHANNEL FLOW THROUGH PASSAGE OF CROSS-SECTIONAL VARIATION (2)-Experimental Investigation of an Open Channel Flow through Passage of an Sudden Expansion or Contraction- |
著者: | 今本, 博健 ![]() 藤井, 良啓 ![]() 藤井, 義文 ![]() |
著者名の別形: | IMAMOTO, Hirotake FUJII, Yoshihira FUJII, Yoshifumi |
発行日: | 1-Apr-1977 |
出版者: | 京都大学防災研究所 |
誌名: | 京都大学防災研究所年報. B |
巻: | 20 |
号: | B-2 |
開始ページ: | 309 |
終了ページ: | 329 |
抄録: | This paper deals with the characteristics of an open channel flow around a suddenwidth-expansion or -contraction. The velocity measurements are carried out with a hot-film flowmeter and a propeller flowmeter. Three dimensional distributions of mean andturbulent velocity, the energy and the momentum coefficients, the Reynolds stress areobtained experimentally. Some interesting results about the bed-variation around a suddenwidth-expansion or -contraction are obtained experimentally.Main results obtained through experimental investigations are as follows; 1) The char-acteristics of mean velocity distribution depend on the expansion or contraction ratioand the kind of flow transition, that is, sub-critical or supercritical transitions. 2) Theenergy and the momentum coefficient of flow in transition have values more than unity.3) The existence of spiral motion is found in the flow through the section of suddencontraction. 4) The energy spectrum of turbulence show the existence of the inertial sub-range which is descriced by the power low of -5/3. |
URI: | http://hdl.handle.net/2433/70155 |
関連リンク: | http://www.dpri.kyoto-u.ac.jp/nenpo/nenpo.html |
出現コレクション: | No.20 B-2 |
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