Diffusion Flames in Corotating and Counterrotating Counterflows

• CHURNG Fong-Jie

• CHANG Chin-Kuan

• LIN Ta-Hui

抄録

The burning and extinction characteristics of a methane diffusion flame in corotating and counterrotating counterflows are experimentally and theoretically investigated. On the basis of the large activation energy asymptotics and the similarity solutions, theoretical predictions are in favorable agreement with the experimental observations on variations of the flame temperature, the flame position and extinction condition with the angular velocity. Results show that by increasing the angular velocity, the flame temperature of a strong diffusion burning is increased to maximum and then decreased ; however, the methane concentration at flame extinction is decreased to minimum and thereafter increased without regard to either corotating or counterrotating counterflow. On the flame extinction, the linear envelope of the extinction curve is valid only for the injection velocity larger than 25cm/sec in rotating counterflows. The extinction profile for smaller injection velocity is curved for both rotating and nonrotating counterflows. Finally, it is found that the absolute minimum fuel concentration on local extinction for diffusion burning cannot be properly identified by the linear extrapolation of the extinction curve.

収録刊行物

• JSME international journal. Ser. 2, Fluids engineering, heat transfer, power, combustion, thermophysical properties

  JSME international journal. Ser. 2, Fluids engineering, heat transfer, power, combustion, thermophysical properties 35 (1), 95-102, 1992

  一般社団法人 日本機械学会

キーワード

• Diffusion Flames
• Rotating Flows
• Flame Extinction

詳細情報

• CRID: 1390001205425341952
• NII論文ID: 110002492747
• NII書誌ID: AA10680596
• DOI: 10.1299/jsmeb1988.35.1_95
• ISSN: 09148817
• Web Site: https://www.jstage.jst.go.jp/article/jsmeb1988/35/1/35_1_95/_pdf
• 本文言語コード: en
• データソース種別:
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  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可