高レイノルズ数領域における円柱の抵抗と発生うず列　　表面粗さの影響

• 安達 勤

• 小野 博基

• 松内 一雄

• 河合 達雄

• 長 哲夫

書誌事項

タイトル別名

• Drag and vortex shedding from circular cylinder in the high reynolds numbers range. Effect of surface roughness.
• コウ レイノルズスウ リョウイキ ニ オケル エンチュウ ノ テイコウ ト ハ

抄録

Discussions are made on the effect of surface roughness on the drag coefficient and Strouhal numbers 5×10⁵≤Re≤10⁷. There is the maximum value of surface roughness which does not effect the drag coefficient and Strouhal number in the subcritical and transitional range and at the critical point. This maximum value is determined as (K_s/d)_crit=5×10^-4. For a larger relative surface roughness value, there are some functional relations between the relative surface roughness (K_s/d) and the minimum drag coefficient and the Reynolds number which corresponds to C_{D min}. In the transcritical Reynolds number range, the drag coefficient depends on the relative surface roughness. It increases with an increase in the relative surface roughness. There arise vortex streets in the wake of a cylinder which satisfy the Bearman's condition, i. e. St*=0.181 in the subcritical and transcritical Reynolds number ranges.

収録刊行物

• 日本機械学会論文集Ｂ編

  日本機械学会論文集Ｂ編 55 (517), 2597-2601, 1989

  一般社団法人 日本機械学会

キーワード

• Drag Coefficient and Strouhal Number

詳細情報

• CRID: 1390001206261271680
• NII論文ID: 130004219177
• NII論文ID: 110002401924
• NII書誌ID: AN00187441
• DOI: 10.1299/kikaib.55.2597
• ISSN: 18848346
• ISSN: 03875016
• NDL書誌ID: 3241301
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3241301
• Web Site: http://www.jstage.jst.go.jp/article/kikaib1979/55/517/55_517_2597/_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