リングに衝突する軸対称噴流せん断層の自励振動

• 小幡 輝夫

• 倉澤 英夫

• 羽田 喜昭

書誌事項

タイトル別名

• Self-Excited Oscillation in an Axisymmetric Jet with a Coaxial Ring.
• リング ニ ショウトツスル ジク タイショウ フンリュウ センダンソウ ノ ジ

抄録

Self-excited oscillation of an axisymmetric jet impinging upon a ring is investigated experimentally. The discreat vortices impinge upon the downstream sharp edge of the ring, in turn producing an upstream influence, thereby closing the loop for sustaining oscillations, as confirmed by the form of phase analysis of velocity and pressure signals. The fundamental frequency component exhibits an overall phase difference of (2nπ) +1/2 (n=0, 1, 2) between the nozzle lip and edge. Furthermore, the fundamental component propagates with phase speed, which is about 0.52∼0.59U_o. Spectral analysis of velocity fluctuation reveals multiple frequency components having substantial amplitudes relative to that of the fundamental frequency component ; using coherence analysis it is shown that the lowest frequency component can interact with the fundamental component either to reinforce itself or to produce an additional frequency component.

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 (583), 890-896, 1995

  一般社団法人 日本機械学会

キーワード

• Axisymmetric Jet

詳細情報

• CRID: 1390001205894066048
• NII論文ID: 130004221610
• NII論文ID: 110002394260
• NII書誌ID: AN00187441
• DOI: 10.1299/kikaib.61.890
• ISSN: 18848346
• ISSN: 03875016
• NDL書誌ID: 3594098
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3594098
• Web Site: http://www.jstage.jst.go.jp/article/kikaib1979/61/583/61_583_890/_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