Proceedings of the KSME Conference (대한기계학회:학술대회논문집)

The Korean Society of Mechanical Engineers (대한기계학회)
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Lift-off and Flame Stability of a Coaxial Non-Premixed Jet Using Oxygen Enriched Air

산소부화공기를 이용한 동축 제트화염의 부상과 연소 안정성

  • 곽지현 (부산대학교 대학원 기계공학과) ;
  • 전충환 (부산대학교 기계기술연구소) ;
  • 장영준 (부산대학교 공과대학 기계공학부)
  • Published : 2003.11.05
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Abstract

Combustion using oxygen enriched air is known as a technology which can increase flame stability as well as thermal efficiency due to improvement of the burning rate. Lift-off, blowout limit and flame length were examined as a function of jet velocity, coflow velocity and OEC(Oxygen Enriched Concentration). Blowout limit of the flame below OEC 25% decreased with coflow velocity, but the limit above OEC 25% increased inversely. Lift-off height decreased with increase of OEC. Especially lift-off hardly occurred in the condition above OEC 40%. Flame length of the flames above OEC 40% was increased until the blowout occurred. Flame stability became improved since lift-off and blowout limit increased much with increase of OEC.

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