乱流環境におかれた乱流斑点のふるまい

• 福西 祐

  東北大・工

• 村田 裕一

  東北大・院 現在, 北海道電力 (株)

• 島田 勝

  東北大・院 現在, 日本車両製造 (株)

• 横川 譲

  東北大・院

書誌事項

タイトル別名

• Behavior of Turbulent Spots in a Turbulent Environment.
• ランリュウ カンキョウ ニ オカレタ ランリュウ ハンテン ノ フルマイ

抄録

Behavior of turbulent spots when they are placed in a turbulent environment is investigated through wind-tunnel experiments. The turbulent spot, introduced by a short-duration emission of a jet from a small hole in the flat plate, grows downstream and moves into a turbulent environment. The turbulent environment is created by either a trip wire or an area of rough surface on the plate surface. Experimental results obtained by applying conditional sampling technique show the spreading of a low velocity region in the spanwise direction at locations away from the wall. The amount of spreading is affected. by the method used for tripping the boundary layer. It is also shown that there is a low velocity region near the center of a turbulent spot, which grows in the vertical direction as it is convected downstream, but does not grow in the spanwise direction. The results indicate the existence of an inclined vortex-pair structure near the center of a turbulent spot.

収録刊行物

• 日本流体力学会誌「ながれ」

  日本流体力学会誌「ながれ」 17 (5), 346-356, 1998

  社団法人 日本流体力学会

キーワード

• Turbulent spot
• Turbulent environment
• Forced transition
• Inclined vortex pair
• Conditional sampling

詳細情報

• CRID: 1390001204696867200
• NII論文ID: 10002443371
• NII論文ID: 130003817826
• NII書誌ID: AN00175191
• DOI: 10.11426/nagare1982.17.346
• ISSN: 21854912
• ISSN: 02863154
• NDL書誌ID: 4599243
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4599243
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可