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

The Korean Society of Mechanical Engineers (대한기계학회)
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Soot Formation in a Double-Concentric Diffusion Flame

동축 이중 확산화염의 매연 생성 특성

  • 정종수 (한국과학기술연구원 지구환경연구센터) ;
  • 이교우 (한국과학기술연구원 지구환경연구센터) ;
  • 고범승 ((주) LG 전자) ;
  • 강경태 (생산기술연구원)
  • Received : 1998.12.15
  • Published : 1999.11.01
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Abstract

An experimental study on a double-concentric diffusion flame(DDF) has been carried on in order to Investigate the characteristics of soot formation compared to a normal coflow diffusion flame(NDF). Laser extinction technique has been used for an ethylene($C_2H_4$) and air flame with various flow rates. Soot formation In the double-concentric diffusion flame was enhanced by the inner inverse diffusion flame due to the increase in flame temperature and also suppressed due to the nitrogen-dilution from the inner air. Soot concentration at the flame axis of DDF was higher than that of the NDF, mainly because of the increase of temperature by inner flame. However, the maximum soot volume fraction of DDF was lower than NDF at the outer side of the flame, mainly due to the effect of nitrogen-dilution from the inner air.

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