減速円柱の渦長さの非定常挙動

• 西川 進栄

• 三神 史彦

書誌事項

タイトル別名

• Transient Behavior of Wake Length around a Decelerated Cylinder.
• ゲンソク エンチュウ ノ ウズ ナガサ ノ ヒテイジョウ キョドウ

抄録

Flows around a decelerated circular cylinder are studied with BFC-MAC scheme for a moving frame of reference. The main results are given for Reynolds number lower than Re=36.5 as in the previous experimental measurements. Typical behaviors of wake length are predicted at a range of deceleration as in the experiment. That is, histories of wake-length: S, if they are plotted against instantaneous Reynolds number, are almost similar for relatively large deceleration α. Such 'Similarity' with respect to α is attempted to be interpreted with a model equation based on approximate estimation of arrival time of the wake-end. In contrast at small deceleration the transient variation of wake-length depends upon α. The mechanisms are discussed such as the fact that the smaller deceleration parameters, the larger delay in elongation of wake length. For large deceleration the proposed model equation, which utilizes the BFC-MAC results on the rear symmetry line at an arbitrary couple of time-steps, successfully illuatrates wake-length history versus instantaneous Reynolds number from start to termination of deceleraton.

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 68 (669), 1407-1414, 2002

  一般社団法人 日本機械学会

キーワード

• Numerical Study

詳細情報

• CRID: 1390001206182872832
• NII論文ID: 130004224539
• NII論文ID: 110002387182
• NII書誌ID: AN00187441
• DOI: 10.1299/kikaib.68.1407
• ISSN: 18848346
• ISSN: 03875016
• NDL書誌ID: 6171611
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6171611
• Web Site: http://www.jstage.jst.go.jp/article/kikaib1979/68/669/68_669_1407/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
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