B131 音響定在波が重なる両端閉止ダクト内熱対流場の可視化計測

• 西野 憲二

  埼玉大工

• 川橋 正昭

  埼玉大工

• 平原 裕行

  埼玉大工

• 國場 裕介

  九州大院

書誌事項

タイトル別名

• Visualization and Measurement of Thermal Convection Flow in a Closed Duct Excited by Acoustic Standing Wave
• オンキョウ テイザイハ ガ カサナル リョウタン ヘイシ ダクトナイ ネツ タ

抄録

This paper describes an experimental investigation on unsteady thermal convection flow in a horizontal closed-duct combined with acoustic standing wave induced in the duct. As the amplitude of acoustic standing wave increases, steady circulating streaming caused by nonlinear effect of finite amplitude oscillatory flow appears within every 1/4 wavelength section. It is called acoustic streaming. On the other hand, the thermal convection flow is characterized by Rayleigh number. In the range of high Rayleigh number, the convection current changes to unsteady and turbulent. When a strong acoustic standing wave is combined to the unsteady or turbulent convection flow, the flow pattern of the convection quickly changes to steady circulating flow similar to the acoustic streaming. PIV technique is applied to quantitative analyses of the resultant flow depending on mode of standing wave, sound pressure, and Rayleigh number. The results show that the resultant flow becomes unstable according to increase of Rayleigh number and at lower mode of oscillation.

収録刊行物

• 可視化情報学会誌

  可視化情報学会誌 18 (Supplement2), 81-82, 1998

  社団法人 可視化情報学会

キーワード

• Acoustic Standing Wave
• Acoustic Streaming
• Natural Convection
• Rayleigh Number

詳細情報

• CRID: 1390282679595645312
• NII論文ID: 10002675896
• NII論文ID: 130003648965
• NII書誌ID: AN10374478
• DOI: 10.3154/jvs.18.supplement2_81
• ISSN: 1884037X
• ISSN: 09164731
• NDL書誌ID: 4571916
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4571916
• 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