正方形断面管路内乱流におけるバースト現象　ＶＩＴＡ法および４象限法によるイベントの検出

• 河原 源太

• 鮎川 恭三

• 越智 順治

• 湯浅 孝史

書誌事項

タイトル別名

• Bursting Phenomena in a Turbulent Square-Duct Flow. Event Detection by the VITA Technique and Quadrant Analysis.
• セイホウケイ ダンメン カンロナイ ランリュウ ニ オケル バースト ゲンショ

抄録

Near-wall bursting has been detected in a fully developed turbulent square-duct flow both by the VITA technique and by quadrant analysis. Discrepancy between these detection schemes is shown, and its possible cause is discussed. Dependence of bursting frequencies and contribution rates to the Reynolds shear stress on threshold parameters is also investigated at the wall bisector, z/H=0.5, and the vicinity of the duct corner, z/H=0.2. In the case of quadrant analysis the bursting frequency at z/H=0.2 is found to be higher than at z/H=0.5 for large threshold values, while in the case of the VITA technique they are nearly identical. It is shown that the contribution rate of ejection at z/H=0.2 is higher than at z/H=0.5, but that of sweep at z/H=0.2 is lower than at z/H=0.5. In addition, a plot of the measured Reynolds shear stress is presented on the wall bisector, and its difference between a square duct and two-dimensional channel is demonstrated.

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 61 (592), 4290-4296, 1995

  一般社団法人 日本機械学会

キーワード

• Reynolds Shear Stress

詳細情報

• CRID: 1390282680870404992
• NII論文ID: 110002394636
• NII論文ID: 130004221949
• NII書誌ID: AN00187441
• DOI: 10.1299/kikaib.61.4290
• ISSN: 18848346
• ISSN: 03875016
• NDL書誌ID: 3925004
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3925004
• Web Site: http://www.jstage.jst.go.jp/article/kikaib1979/61/592/61_592_4290/_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