| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2007-04-19 |
| タイトル |
|
|
タイトル |
ノズル内の二次元物体後流によってフラッピングする二次元噴流の渦構造(第２報，可視化観測および時系列画像相関解析) |
|
言語 |
ja |
| タイトル |
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|
タイトル |
Vortical Structures in a Two-Demensional Jet Under Flapping Motion Generated by a Wake of a Cylinder Installed in a Nozzle Contraction (2nd Report, Flow Visualization and Image Correlation Analysis) |
|
言語 |
en |
| 言語 |
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|
言語 |
jpn |
| 資源タイプ |
|
|
資源 |
http://purl.org/coar/resource_type/c_6501 |
|
タイプ |
journal article |
| 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 |
| 著者 |
宮越, 勝美
羽二生, 博之
呉, 平
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| 著者別名 |
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識別子Scheme |
WEKO |
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識別子 |
34504 |
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姓名 |
MIYAKOSHI, Katsumi |
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言語 |
en |
| 著者別名 |
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識別子Scheme |
WEKO |
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|
識別子 |
34505 |
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|
姓名 |
HANIU, Hiroyuki |
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言語 |
en |
| 著者別名 |
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識別子Scheme |
WEKO |
|
|
識別子 |
34506 |
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|
姓名 |
WU, Ping |
|
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言語 |
en |
| 抄録 |
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内容記述タイプ |
Abstract |
|
内容記述 |
When a plane jet exhibits flapping motion, two distinctive peaks, f_1 and f_2, appear in the spectrum of fluctuating velocity. The mean frequency is half of the frequency, f_v, of vortices shedding from a two-dimensional body that is installed in a jet nozzle contraction. Jet mixing has been enhanced by the flapping motion with a low frequency, f_3=f_1-f_2, which is considered to be caused by an inharmonic excitation. Vortical structures in the flapping jet are investigated by using flow visualization, image correlation and laser Doppler velocimetry. Vortices are seen to roll up asymmetrically at the jet nozzle exit, at a double frequency of that of the vortex shedding from the cylinder. Two types of vortices are formed by coalescence between these vortices and the vortices shedding from the cylinder. The periodicities of these two types of vortices are found to be equal. It is noted that vortices with f_1 or f_2 do not exist in the flow. The f_1 and f_2 are caused by the modulation of amplitude of the coalesced vortical structures with half of the flapping frequency, f_3. |
| 書誌情報 |
日本機械学会論文集B編
巻 72,
号 719,
p. 1751-1758,
発行日 2006-07
|
| 権利 |
|
|
権利情報 |
社団法人日本機械学会, 宮越勝美，羽二生博之，呉平, 日本機械学会論文集B編, 72(719), 2006, 1751-1758. |
| フォーマット |
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内容記述タイプ |
Other |
|
内容記述 |
application/pdf |
| 出版者 |
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|
出版者 |
日本機械学会 |
|
言語 |
ja |
| 著者版フラグ |
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|
言語 |
en |
|
値 |
publisher |
| 出版タイプ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
5046.pdf (4.2 MB)
