DSpace university logo mark
Japanese | English 

NAOSITE : Nagasaki University's Academic Output SITE > 060 工学部・工学研究科 > 060 紀要 > 長崎大学工学部研究報告 > 第39巻 第73号 >


ファイル 記述 サイズフォーマット
39_73_03.pdf2.27 MBAdobe PDF本文ファイル

タイトル: NACA翼周りのはく離渦と空力騒音の関係
その他のタイトル: Relationship between Separated Vortex around NACA blade and Aerodynamic Noise
著者: 佐々木, 壮一 / 高松, 肇一 / 林, 秀千人
著者(別表記) : Sasaki, Soichi / Takamatsu, Hajime / Hayashi, Hidechito
発行日: 2009年 8月
出版者: 長崎大学工学部
引用: 長崎大学工学部研究報告 Vol.39(73), pp.15-20; 2009
抄録: To clarify the mechanism of the aerodynamic noise generated by the separated vortex around a NACA blade is aimed. The relation between the angle of attack and the aerodynamic noise of the blade are analyzed by the wind tunnel experiment and a commercial CFD code. In the case of rear surface separation, the separated vortex that has a large scale structure in the direction of the blade chord is transformed to the vortical structure that has concentrated to the trailing edge with the increase of the angle of attack. Then the aerodynamic noise level becomes small according to the vortex scale in the blade chord. The separated vortex is formed at the vicinity of the trailing edge when the flow is separated at the leading edge. The pressure fluctuation on the blade surface at the vicinity of trailing edge becomes large by the vortex in the wake. The aerodynamic noise level becomes large with the increase of the pressure fluctuation and the expansion of the correlation length by the vortex scale when the flow is separated at the leading edge.
キーワード: Aerodynamic Noise / Wake / Shear Flow / Blade / Turbulent Flow
URI: http://hdl.handle.net/10069/22135
関連リンク : http://www.lb.nagasaki-u.ac.jp/reports/kougaku/preview.php?id=82
資料タイプ: Departmental Bulletin Paper
原稿種類: publisher
出現コレクション:第39巻 第73号

引用URI : http://hdl.handle.net/10069/22135



Valid XHTML 1.0! Copyright © 2006-2015 長崎大学附属図書館 - お問い合わせ Powerd by DSpace