C213 同軸噴流の軸対称とヘリカルモードの流れ構造

• 木綿 隆弘

  金沢大

• 宮崎 勝也

  金沢大院

• 木村 繁男

  金沢大

• 小松 信義

  金沢大

書誌事項

タイトル別名

• Flow Structure of a Coaxial Jet with Axisymmetric and Helical Instabilities
• ドウジク フンリュウ ノ ジク タイショウ ト ヘリカルモード ノ ナガレ コウゾウ

抄録

The aim of the present paper is to clarify the flow structure in a coaxial jet with axisymmetric and helical instabilities for low Reynolds number. The flow visualization and the measurements of mean and fluctuating velocities by the particle image velocimetry (PIV) technique were carried out in an open water tank. The Reynolds number based on the outer diameter and the mean velocity of the annular jet was 3000. The mean velocity ratio was 0.65. For the coaxial jet with helical instability, it was found that the streamwise velocity along the centerline of the jet decreased more than that of the coaxial jet with axisymmetric instability, and the amplitude of the velocity fluctuation was small near the nozzle exit. This shows that the increase of the velocity fluctuation in the outer mixing region is associated with the arrangement of the vortexstreet in the shear layer.

収録刊行物

• 可視化情報学会誌

  可視化情報学会誌 26 (Supplement2), 323-326, 2006

  社団法人 可視化情報学会

キーワード

• Coaxial Jet
• Axisymmetric and Helical Vortices
• PIV
• LIF

詳細情報

• CRID: 1390001204620840320
• NII論文ID: 10018247622
• NII論文ID: 130003650476
• NII書誌ID: AN10374478
• DOI: 10.3154/jvs.26.supplement2_323
• ISSN: 1884037X
• ISSN: 09164731
• NDL書誌ID: 8517286
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8517286
• 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