Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Effect of Oxygen Enriched Air on the Combustion Characteristics in a Coaxial Non-Premixed Jet (II) - Flame Structure and Temperature Distribution -

산소부화공기가 동축 비예혼합 제트의 연소특성에 미치는 영향 (II) - 화염의 구조와 온도분포 -

  • 곽지현 (부산대학교 대학원 기계공학과) ;
  • 전충환 (부산대학교 기계기술연구소) ;
  • 장영준 (부산대학교 공과대학 기계공학부)
  • Published : 2004.02.01
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Abstract

Combustion using oxygen enriched air is known as a technology which can increase thermal efficiency due to increase of the flame temperature. Flame shapes, schlieren photos, OH radical chemiluminescence and local flame temperature were examined as a function of OEC(Oxygen Enriched Concentration) in a coaxial non-premixed jet. With increase of OEC, flame length and width decreased, but its brightness increased significantly, and the size of vortices in the flame also increased. Especially, the reaction around the flame surface became active. The strong OH intensity appeared to be made and moved from middle stream to upper one with increase of OEC, which shows combustion reaction in the upper stream becomes more dominant In addition, the temperature distributions of the flames showed similar tendency with OH radical intensities. A flame with high temperature and strong stability was obtained with increasing OEC of the coflow.

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References

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