| Item type |
紀要論文 / Departmental Bulletin Paper(1) |
| 公開日 |
2015-03-26 |
| タイトル |
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タイトル |
Further Experiments on the Effect of a Single Roughness Element on Boundary-Layer Transition |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
departmental bulletin paper |
| その他のタイトル |
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その他のタイトル |
境界層の遷移に及ぼす単一粗さの影響の続実験 |
| 著者 |
谷, 一郎
井内, 松三郎
山本, 一夫
TANI, Itiro
IUCHI, Matsusaburo
YAMAMOTO, Kazuo
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| 著者所属 |
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東京大学理工学研究所 |
| 著者所属 |
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東京大学理工学研究所 |
| 著者所属（英） |
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en |
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THE INSTITUTE OF SCIENCE AND TECHNOLOGY, UNIVERSITY OF TOKYO |
| 著者所属（英） |
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en |
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THE INSTITUTE OF SCIENCE AND TECHNOLOGY, UNIVERSITY OF TOKYO |
| 著者所属（英） |
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en |
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Department of Chemical Engineering, Tokyo Metropolitan University |
| 出版者 |
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出版者 |
東京大学理工学研究所 |
| 書誌情報 |
東京大學理工學研究所報告
巻 8,
号 4,
p. 171-178,
発行日 1954-10-21
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| 抄録（英） |
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内容記述タイプ |
Other |
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内容記述 |
As the continuation of the previous work of one of the authors, wind-tunnel experiments were made to investigate the effect of a single roughness element on transition from laminar to turbulent flow in the boundary layer in the presence of favorable pressure gradient and of free-stream turbulence. As pointed out by Dryden, the roughness effect proves to be dependent on the ratio of the height k of the roughness element to the displacement thickness δ^*_k of the boundary layer at the element, provided that the transition occurs at a distance from the element. A good correlation of the available data is obtained by plotting the transition Reynolds number Re^*_t based on the displacement thickness as a function of the ratio k/δ^*_k. The presence of a favorable pressure gradient can scarcely alter the relation between Re^*_t and k/δ^_k in the range of variables covered by the present experiment. The effect of free-stream turbulence is conspicuous only at small values of k/δ^*_k, the relation between Re^*_t and k/δ^*_k tending to become a single curve as k/δ^*_k increases. |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
0371-6090 |
| 書誌レコードID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AN00162611 |
| 資料番号 |
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内容記述タイプ |
Other |
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内容記述 |
資料番号: SA1511587000 |
SA1511587.pdf (569.2 kB)
