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On the Development of Coherent Structure in a Planet Jet (Part 3, Multi-Point Simultaneous Measurement of Main Streamwise Velocity and the Reconstruction of Velocity Field by the KL Expansion)
http://hdl.handle.net/2237/9008
http://hdl.handle.net/2237/900878c28ef0-bb0b-4733-8e43-d0ae8d53a72a
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
JsMecEngB-49-3-722.pdf (1.2 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2007-11-15 | |||||
| タイトル | ||||||
| タイトル | On the Development of Coherent Structure in a Planet Jet (Part 3, Multi-Point Simultaneous Measurement of Main Streamwise Velocity and the Reconstruction of Velocity Field by the KL Expansion) | |||||
| 言語 | en | |||||
| 著者 |
SAKAI, Yasuhiko
× SAKAI, Yasuhiko× TANAKA, Nobuhiko× YAMAMOTO, Mutsumi× KUSHIDA, Takehiro |
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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 | |||||
| 権利 | ||||||
| 言語 | ja | |||||
| 権利情報 | 日本機械学会 | |||||
| 権利 | ||||||
| 言語 | ja | |||||
| 権利情報 | 本文データは学協会の許諾に基づきCiNiiから複製したものである。 | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Jet | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Turbulence | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Vortex | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Flow Measurements | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Spatial Velocity Correlation | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Karhunen Loève Expansion | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Coherent Structure | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Flapping Phenomenon | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In order to clarify the dynamics of the coherent structure in a turbulent plane jet, the simultaneous measurement of the main streamwise velocity at 21 points in the self-preserving region of a turbulent plane jet has been performed by an array of I-type hot-wire probes. Then the KL (Karhunen-Loève) expansion was applied to extract the coherent structure in the jet. The total number of eigenfunctions (modes) is N=21, which corresponds to the number of probes. The eigenfunctions (modes) are numbered in order of magnitude of their corresponding eigenvalues. From the investigation of the random coefficients and the eigenfunctions (modes), it is found that the low-numbered (energetic) modes represent the large scale(coherent) structure, the middle-numbered modes represent the finer (small-scale) random structure, and the higher-numbered modes contribute mainly to the intermittent structure in the outer edge region. From the spatio-temporal velocity field reconstructed by the first KL mode, it is found that there exist a pair of fluid lumps with the positive and negative streamwise velocity fluctuation on the opposite sides of the jet centerline, and the signs of velocity fluctuation for those fluid lumps change alternately as time proceeds. These characteristics are consistent with the so called “jet flapping” phenomenon. | |||||
| 言語 | en | |||||
| 出版者 | ||||||
| 出版者 | The Japan Society of Mechanical Engineers | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプresource | http://purl.org/coar/resource_type/c_6501 | |||||
| タイプ | journal article | |||||
| 出版タイプ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| 関連情報 | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://ci.nii.ac.jp/naid/110004773146/ | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 1340-8054 | |||||
| 書誌情報 |
en : JSME International Journal Series B 巻 49, 号 3, p. 722-730, 発行日 2006-08 |
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| フォーマット | ||||||
| 値 | application/pdf | |||||
| 著者版フラグ | ||||||
| 値 | publisher | |||||
| URI | ||||||
| 識別子 | http://hdl.handle.net/2237/9008 | |||||
| 識別子タイプ | HDL | |||||
