オリフィス急拡大付着流れに発生する渦構造に関する実験的研究

• 大庭 拓也

  東京大学大学院

• 李家 賢一

  東京大学大学院工学系研究科航空宇宙工学専攻

• 砂田 保人

  東京大学大学院工学系研究科航空宇宙工学専攻

書誌事項

タイトル別名

• Experimental Studies of the Flow through an Axial Sudden Expansion with Orifice.
• オリフィス キュウカクダイ フチャク ナガレ ニ ハッセイ スル ウズ コウゾウ ニ カンスル ジッケンテキ ケンキュウ

抄録

Separated and reattaching flows produced by an axial sudden expansion have been studied experimentally. The flow fields were produced by an axisymmetric sudden enlargement from an orifice of diameter 30mm to a pipe of diameter 80mm. Mean velocities and turbulent intensities were measured by a hot-wire anemometry. The Reynolds number based on the orifice diameter was 25, 000. Flow visualization tests were also done. It was shown that large-scale vortices are produced at the orifice. These vortices begin to pair each other, but soon they lose their axisymmetry, i.e. breakdown occurs. The streamwise position where this breakdown occurs is located at much more upstream position when compared with that of an orifice free-jet flow under the same inlet condition.

収録刊行物

• 日本航空宇宙学会論文集

  日本航空宇宙学会論文集 48 (554), 82-88, 2000

  一般社団法人 日本航空宇宙学会

キーワード

• Separated Shear Layer
• Axial Sudden Expansion
• Vortical Structure

詳細情報

• CRID: 1390001204470776576
• NII論文ID: 10004538444
• NII書誌ID: AA11307372
• DOI: 10.2322/jjsass.48.82
• ISSN: 24323691
• ISSN: 13446460
• NDL書誌ID: 5295553
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5295553
• Web Site: https://www.jstage.jst.go.jp/article/jjsass1999/48/554/48_554_82/_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