だ円板後流における低周波非定常性

• 阿部 行伸

• 木谷 勝

• 望月 修

書誌事項

タイトル別名

• Low-Frequency Unsteadiness in Elliptic Wakes.
• ダ エンバン コウリュウ ニ オケル テイシュウハ ヒテイジョウセイ

抄録

Velocity fluctuations in the near wake of an elliptic disk are analyzed by the wavelet transform with Morlet wavelet. Modulations of the wavelet coefficient demonstrate two dominant periodic components in the velocity fluctuations and their amplitude modulations. The periodic components, which correspond to frequencies of vortex shedding in the major-and minor-axis planes, have low-frequency amplitude modulations. The modulus of the wavelet coefficient shows that the amplitude modulations have a central frequency of approximately 1/5 of the corresponding vortex shedding frequency. Moreover, the amplitude modulations are found to be out of phase in the major and minor-axis planes, while those in each plane are in phase at opposite positions in the plane.

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 64 (626), 3156-3161, 1998

  一般社団法人 日本機械学会

キーワード

• Wavelet Transform

詳細情報

• CRID: 1390282680872335872
• NII論文ID: 110002397270
• NII論文ID: 130004223152
• NII書誌ID: AN00187441
• DOI: 10.1299/kikaib.64.3156
• ISSN: 18848346
• ISSN: 03875016
• NDL書誌ID: 4592522
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4592522
• Web Site: http://www.jstage.jst.go.jp/article/kikaib1979/64/626/64_626_3156/_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