非剥離流および対称渦対状態における波動場の円柱の抗力係数

• 石田 啓

  社団法人 土木学会 金沢大学 工学部土木建設工学科

• 田村 賢一

  元金沢大学大学院

書誌事項

タイトル別名

• THE DETERMINATION OF THE DRAG COEFFICIENT FOR A CIRCULAR CYLINDER PLACED VERTICALLY IN A WAVE FIELD UNDER THE CONDITIONS OF NON-SEPARATION FLOW AND SYMMETRIC VORTICES
• ヒ ハクリリュウ オヨビ タイショウ ウズ ツイジョウタイ ニ オケル ハドウ

抄録

A theoretical and experimental study is performed to determine the characteristics of the drag coefficient for a vertical circular cylinder in waves. Theoretically, the laminar boundary layer solution on the cylinder is obtained by applying the perturbation method to the Navier-Stokes equation. By using this solution, the separation point is determined and the point vortices to model the wake are shed from the separation point. The drag force is calculated by applying the momentum equation to the wave field including the shedding vortices. In the case of non-separation flow, the momentum defect in the boundary layer causes a drag force which greatly exceeds the surface friction force around a cylinder. The experimental values of the drag coefficient versus the Keulegan-Carpenters' number are compared with the theoretical. They agree quite well, which verifies the presented theory.

収録刊行物

• 土木学会論文集

  土木学会論文集 1988 (393), 121-130, 1988-05-20

  公益社団法人 土木学会

キーワード

• non-separation and symmetric vortices frow
• wave field
• vertical circular cylinder
• drag coefficient

詳細情報

• CRID: 1390001205600763904
• NII論文ID: 40004505941
• NII論文ID: 130003980799
• NII書誌ID: AN10014020
• DOI: 10.2208/jscej.1988.393_121
• ISSN: 18827187
• ISSN: 02897806
• NDL書誌ID: 3179772
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3179772
• Web Site: https://www.jstage.jst.go.jp/article/jscej1984/1988/393/1988_393_121/_pdf
• 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