Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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The Characteristics of Soot at the Post-Flame Region in Jet Diffusion Flames Added Carbon Dioxide

이산화탄소가 첨가된 제트확산화염 후류에서의 매연 특성

  • Ji, Jung-Hoon (School of Safety Engineering, Pukyong National University) ;
  • Lee, Eui-Ju (School of Safety Engineering, Pukyong National University)
  • Received : 2010.06.24
  • Accepted : 2010.12.10
  • Published : 2010.12.31
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Abstract

An experimental study for characteristics of soot were conducted at the post-flame region in jet diffusion flames, where carbon dioxide was used as additives in oxidizer stream. Light-extinction method was performed using He-Ne laser with wave length at 632.8nm for the measurement of relative soot density and soot volume fraction with dimensionless extinction coefficient, $K_e$ and mass specific extinction coefficient, ${\sigma}_s$. To increase of resolution, laser light was modified for sheet-form using concave, convex lenses and slit. C/H ratio was introduced for quantitative analysis of soot growth which is expressed by carbonization and dehydrogen. Also transmission electron microscopy(TEM) was used for observation of morphological shape. The results show that the relative soot density in the post-flame region was lower when carbon dioxide was added in oxidizer stream because of reduction of flame temperature.

Keywords

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