| Item type |
紀要論文 / Departmental Bulletin Paper(1) |
| 公開日 |
2015-03-26 |
| タイトル |
|
|
タイトル |
Numerical Simulation of Autorotation |
|
言語 |
en |
| 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_6501 |
|
資源タイプ |
departmental bulletin paper |
| 著者 |
井筒, 直樹
大島, 裕子
IZUTSU, Naoki
OSHIMA, Yuko
|
| 著者所属 |
|
|
|
宇宙科学研究所 |
| 著者所属 |
|
|
|
お茶の水女子大学 |
| 著者所属（英） |
|
|
|
en |
|
|
The Institute of Space and Astronautical Science |
| 著者所属（英） |
|
|
|
en |
|
|
Department of Physics, Ochanomizu University |
| 出版者 |
|
|
出版者 |
宇宙科学研究所 |
| 出版者（英） |
|
|
出版者 |
Institute of Space and Astronautical Science |
| 書誌情報 |
en : The Institute of Space and Astronautical Science report. S.P. : Proceedingss of the Symposium on Mechanics for Space Flight
巻 2,
p. 29-41,
発行日 1984-03
|
| 抄録（英） |
|
|
内容記述タイプ |
Other |
|
内容記述 |
Autorotation of an elliptic cylinder around its spanwise axis fixed perpendicularly in a uniform flow was numerically simulated by using discrete vortex-blob method and compared with experimental results using wind tunnel and water channel. The flow fields around the cylinder driven externally with constant angular velocity were investigated, and the effects of the moment of inertia and of the thickness ratio of the cylinder on the starting condition of autorotation were analyzed, which clarified the mechanism of autorotation. That is, the driving force is due to shedding of the vortex clinging behind the retreating edge. The cylinders with sufficiently large moments of inertia rotate with constant angular velocity, whereas those with smaller one induce periodic variation of angular velocity. The cylinders with smaller moment of inertia than a critical value cannot sustain autorotation. It was also found that the autorotation frequency increases as the thickness ratio of the elliptic cylinder decreases, and eventually reaches the maximum values which is larger than the one of a flat plate. |
| ISSN |
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|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0288-433X |
| 書誌レコードID |
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|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA10455137 |
| 資料番号 |
|
|
内容記述タイプ |
Other |
|
内容記述 |
資料番号: SA0033492000 |
SA0033492.pdf (831.2 kB)
