Passive Separation Control on a Square Cylinder at Transonic Speed.

• Layukallo Thombi

  School of Engineering, Nagoya University

• Nakamura Yoshiaki

  Department of Aerospace Engineering, Nagoya University

抄録

A method to control flow separation on a square cylinder has been investigated. The method incorporates the use of small tabs that were deployed in highly separated regions on the sides of the cylinder. The effectiveness of the tabs was investigated mainly at M=0.56, with limited data also taken at M=0.71. The tabs proved to be very effective in reducing drag and suppressing force fluctuations on the cylinder. The largest drag reduction, amounting to almost 35%, was achieved at M=0.56. Pressure measurements on the cylinder surface revealed that large pressure increases were created across the tabs and on the cylinder’s rear surface, leading to the observation of a large reduction in drag. Based on the experimental observations, a simplified flow model to explain these phenomena is proposed in which the tab effects are attributed mainly to the obstruction of the reverse flow in the separated region, creating pressure reduction upstream of the tab and pressure increase downstream of it.

収録刊行物

• TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

  TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES 45 (150), 236-242, 2003

  一般社団法人 日本航空宇宙学会

キーワード

• Flow Control
• Separated Flow
• Bluff Body

詳細情報

• CRID: 1390282679057068160
• NII論文ID: 130000151355
• NII書誌ID: AA0086707X
• DOI: 10.2322/tjsass.45.236
• ISSN: 21894205
• ISSN: 05493811
• NDL書誌ID: 6446630
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6446630
• Web Site: https://www.jstage.jst.go.jp/article/tjsass/45/150/45_150_236/_pdf
• 本文言語コード: en
• 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