曲がりを伴う矩形管内の乱流に関する実験的研究

• 宇都宮, 浩司

• 中西, 助次

• Utsunomiya, Koji

• Nakanishi, Suketsugu

書誌事項

タイトル別名

• A Study on the Turbulent Duct flow in a Three-Dimensional Duct with Curvature
• マガリ オ トモナウ クケイカン ナイ ノ ランリュウ ニ カンスル ジッケンテキ ケンキュウ

抄録

application/pdf

The turbulent flow in a duct with curvature was investigated by measuring the three dimensional flow fields. Because of the secondary flow influenced by centrifugal force in a curved duct, the effect of duct contraction and expansion were examined. The cross sectional size of the rectangular duct was 120mm by 2４0mm, with a curvature of 200°. The experiments were conducted for three duct geometries: a constant duct width （the standard case）, a contraction in duct width, and a duct expansion. The changes in duct width took place from the latter half of the duct curvature as it transitioned to the straight duct section. The results indicated that for the case of an expanding duct, the velocity defect flow was larger, turbulent intensity increased, and the turbulent boundary layer thickened and expanded in three dimensions, as compared with the standard straight duct case. When the flow was contracted, the turbulent intensity and the turbulent boundary layer thickness both decreased, with greater uniformity of the velocity profiles, as compared with the standard case.

収録刊行物

• 広島工業大学紀要. 研究編

  広島工業大学紀要. 研究編 48 15-21, 2014-02

  広島工業大学

キーワード

• Turbulent Flow
• Curved Duct
• Internal Flow
• Three Dimensional Boundary Layer
• Secondary

詳細情報

• CRID: 1050295757691471232
• NII論文ID: 120005403523
• NII書誌ID: AA11599110
• ISSN: 13469975
• NDL書誌ID: 025291006
• Web Site: https://it-hiroshima.repo.nii.ac.jp/records/967
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I025291006
• 本文言語コード: ja
• 資料種別: departmental bulletin paper
• データソース種別:
  • IRDB
  • NDL
  • CiNii Articles