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

  • 제31권12호
  • /
  • Pages.1009-1016
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  • 2007
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  • 1226-4881(pISSN)
  • /
  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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메탄-수소 대향류확산화염에서 H2와 H의 선호확산을 통한 화학적 효과에 관한 연구

A Study on Chemical Effecta Through Preferential Diffusion of H2 and H in CH4-H2 Counterflow Diffusion Flames

  • 박정 (부경대학교 기계공학부) ;
  • 권오붕 (부경대학교 기계공학부) ;
  • 이의주 (부경대학교 안전공학부) ;
  • 윤진한 (한국기계연구원 청정환경기계연구센터) ;
  • 길상인 (한국기계연구원 청정환경기계연구센터)
  • 발행 : 2007.12.01
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초록

Numerical study on preferential diffusion effects in flame structure in $CH_4-H_2$ diffusion flames is conducted with detailed chemistry. Comparison of flame structures with mixture-averaged species diffusion and suppression of the diffusivities of $H_2$ and H was made. Discernible differences in flame structures are displayed with three species diffusion models. The behaviors of maximum flame temperatures with those species diffusion models are not explained by scalar dissipation rate but by the nature of chemical kinetics. It is seen that the modifcation of flame structure is mainly due to the preferential diffusion of H2 and thereby the nature of chemical kinetics. It is also found that the behaviors of major species with the three species diffusion models are addressed to the nature of chemical kinetics, and this is evident by examining importantly contributing reaction steps to the production and destruction of those chemical species.

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참고문헌

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