On selectivity of Karman-vortex shedding frequency

Autor:	Takagi, Shohei, Atobe, Takashi, Ito, Nobutake, Kamono, Shinobu, Rikitake, Satoru
Jazyk:	japonština
Rok vydání:	2007
Předmět:	空力騒音 音響擾乱 trailing edge 周波数選択性 aerodynamic noise NACA 0012 flow visualization 翼 wing 流れの可視化 turbulent flow wake 絶対不安定 Karman vortex street absolute instability acoustic disturbance 対流不安定 後流 後縁 音響励起 frequency selectivity 乱流 カルマン渦列 NACA0012 convective instability acoustic excitation
Zdroj:	宇宙航空研究開発機構特別資料: 境界層遷移の解明と制御研究会講演論文集 第37回・第38回 = JAXA Special Publication: Proceedings of the 37th and 38th JAXA Workshops on Investigation and Control of Boundary-Layer Transition. :13-14
ISSN:	1349-113X
Popis:	Wake structure behind an NACA0012 with no incidence was examined to scrutinize the frequency selection mechanism of growing disturbances at Re = 7,200 based on the wing chord and the free-stream velocity. Two different kinds of unstable disturbances, which exponentially grow in space, were observed. The minor disturbance is due to convective instability, while the origin of the major one may be attributed to absolute instability. Theoretical comparison is necessary to identify these disturbances. 資料番号: AA0063156004 レポート番号: JAXA-SP-06-013
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=jairo_______::fec52907b60ce5d1d67ffaeff143d325 http://id.nii.ac.jp/1696/00005917/ Zobrazit plný text záznamu