翼近傍後流の外乱に対する応答

• 浅井 雅人

  東京都立科学技術大学工学部

• 妹尾 貴文

  東京航空計器 (株)

• 西岡 通男

  大阪府立大学工学部

書誌事項

タイトル別名

• Response of Airfoil Near-Wake to External Forcing.
• ヨク キンボウ コウリュウ ノ ガイラン ニ タイスル オウトウ

抄録

The response of an airfoil wake to acoustic forcing is examined experimentally for NACA0012 airfoil at moderate and high angles of attack, at a chord-Reynolds number R_c=23×10⁴. At a moderate angle of attack α=10°, the flow is found to be highly receptive to acoustic forcings over a wide range of frequencies and the excited vortices can govern the downstream wake. At a stall angle α=16°, on the other hand, nearly periodic large-scale vortical structures appear and govern the wake without the forcing, indicating the appearance of the absolute instability in the near wake, not unlike that of bluff-body wakes. In this case, the small-amplitude external forcing can not control the vortex shedding except at and around the natural shedding frequency, suggesting that the stall is critically governed by the absolute (or global mode) instability under natural flow conditions without large-amplitude external forcings.

収録刊行物

• 日本航空宇宙学会誌

  日本航空宇宙学会誌 45 (522), 411-416, 1997

  一般社団法人 日本航空宇宙学会

キーワード

• Fluid Dynamics
• Airfoil Wake
• Flow Instability
• Flow Control

詳細情報

• CRID: 1390282679455279232
• NII論文ID: 10002861837
• NII書誌ID: AN00189072
• DOI: 10.2322/jjsass1969.45.411
• ISSN: 24241369
• ISSN: 00214663
• NDL書誌ID: 4257412
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4257412
• Web Site: https://www.jstage.jst.go.jp/article/jjsass1969/45/522/45_522_411/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可