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As the first step, 1 report how the cavitation changes the lift and the drag of hydro-foils from non-cavitation. The lift increases while cavitation is weak comparatively, and the more angle of attack enlarges, the more rate of increased lift due to cavitation is extended. At the angle of attack is 10 degrees, the maximum lift is about 15% above non-cavitation. As the cavitation develops strongly, the lift begins to fall off gradually, and when the length of cavitation along upper surface of hydro-foil develops more than 80% of the length of chord, the lift drops below non-cavitation. On the other hand, the drag increases as soon as cavitation inception occurs, and on the fully developed cavitation, the drag also drops below noncavitation. The maximum of increased drag due to cavitation is from 20 to 30% above non-cavitation, and it is far larger than the maximum rate of increased lift. On the experiments, two hydro-foils were prepared, the thickness are 16% and 12% of chord respectively. For the smaller angle of attack, cavitation inception is easy to occur on the thicker hydro-foil than on the thiner. 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翼型のキャビテーション特性 (第1報)
http://hdl.handle.net/20.500.12000/23747
http://hdl.handle.net/20.500.12000/237479f3f1a7b-69f3-4d70-b13e-aeec0c2c515c
名前 / ファイル | ライセンス | アクション |
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NO01P001.pdf
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Item type | デフォルトアイテムタイプ(フル)(1) | |||||||||
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公開日 | 2012-03-09 | |||||||||
タイトル | ||||||||||
タイトル | 翼型のキャビテーション特性 (第1報) | |||||||||
言語 | ja | |||||||||
タイトル | ||||||||||
タイトル | Cavitation Characteristics for Hydrofoil Sections of Infinite Aspect Ratio | |||||||||
言語 | en | |||||||||
作成者 |
真栄田, 義才
× 真栄田, 義才
× Maeda, Gisai
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アクセス権 | ||||||||||
アクセス権 | open access | |||||||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||||
内容記述 | ||||||||||
内容記述タイプ | Other | |||||||||
内容記述 | This paper presents the characteristics of hydro-foils on cavitation. As the first step, 1 report how the cavitation changes the lift and the drag of hydro-foils from non-cavitation. The lift increases while cavitation is weak comparatively, and the more angle of attack enlarges, the more rate of increased lift due to cavitation is extended. At the angle of attack is 10 degrees, the maximum lift is about 15% above non-cavitation. As the cavitation develops strongly, the lift begins to fall off gradually, and when the length of cavitation along upper surface of hydro-foil develops more than 80% of the length of chord, the lift drops below non-cavitation. On the other hand, the drag increases as soon as cavitation inception occurs, and on the fully developed cavitation, the drag also drops below noncavitation. The maximum of increased drag due to cavitation is from 20 to 30% above non-cavitation, and it is far larger than the maximum rate of increased lift. On the experiments, two hydro-foils were prepared, the thickness are 16% and 12% of chord respectively. For the smaller angle of attack, cavitation inception is easy to occur on the thicker hydro-foil than on the thiner. But, for the larger angle of attack, cavitation inception occurs easily on the thiner hydro-foil. | |||||||||
内容記述 | ||||||||||
内容記述タイプ | Other | |||||||||
内容記述 | 紀要論文 | |||||||||
出版者 | ||||||||||
言語 | ja | |||||||||
出版者 | 琉球大学理工学部 | |||||||||
出版者 | ||||||||||
言語 | en | |||||||||
出版者 | Science and Engineering Division, University of the Ryukyus | |||||||||
言語 | ||||||||||
言語 | jpn | |||||||||
資源タイプ | ||||||||||
資源タイプ | departmental bulletin paper | |||||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||
出版タイプ | ||||||||||
出版タイプ | VoR | |||||||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||
識別子 | ||||||||||
識別子 | http://hdl.handle.net/20.500.12000/23747 | |||||||||
識別子タイプ | HDL | |||||||||
収録物識別子 | ||||||||||
収録物識別子タイプ | ISSN | |||||||||
収録物識別子 | 0387-429X | |||||||||
収録物識別子 | ||||||||||
収録物識別子タイプ | NCID | |||||||||
収録物識別子 | AN00250785 | |||||||||
収録物名 | ||||||||||
言語 | ja | |||||||||
収録物名 | 琉球大学理工学部紀要. 工学篇 | |||||||||
収録物名 | ||||||||||
言語 | en | |||||||||
収録物名 | Bulletin of Science & Engineering Division, University of the Ryukyus. Engineering | |||||||||
書誌情報 |
号 1, p. 1-12, 発行日 1968-05 |