0818 LEBUを用いた粗面乱流境界層の制御に関する実験的研究

• 岡本 昇馬

  山口大院

• 望月 信介

  山口大院

書誌事項

タイトル別名

• 0818 Control of Rough-Wall Turbulent Boundary Layer by Large Eddy Break-Up Devices

抄録

Management of rough-wall turbulent boundary layer with LEBU has been investigated experimentally. The flat wing was located at two different heights, h = 0.4δ and 0.8δ. The mean velocity and the streamwise turbulent intensity were measured by the constant temperature type hot-wire anemometer. The LEBU manipulator successfully reduces evolution of momentum thickness and local wall shear stress over rough surface. Reduction of the local skin friction coefficient is greater than that in smooth wall boundary layers. Especially, in case of LEBU located at h = 0.4δ, large drag reduction is maintained for relatively long downstream distance. Reynolds shear stress is significantly reduced by the LEBU manipulator. Reduction of the Reynolds shear stress near the wall is remarkable in the case of h = 0.4δ.

収録刊行物

• 流体工学部門講演会講演論文集

  流体工学部門講演会講演論文集 2014 (0), _0818-1_-_0818-2_, 2014

  一般社団法人 日本機械学会

キーワード

• Boundary Layer
• Turbulent Flow
• Rough Wall
• Drag Reduction
• LEBU

詳細情報

• CRID: 1390282680861213952
• NII論文ID: 110009938707
• DOI: 10.1299/jsmefed.2014._0818-1_
• ISSN: 24242896
• Web Site: https://www.jstage.jst.go.jp/article/jsmefed/2014/0/2014__0818-1_/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可