Journal of the Korean Society of Combustion (한국연소학회지)

The Korean Society of Combustion (한국연소학회)
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A Study on Downstream Interaction between Methane-air and Syngas-air Premixed Flames

메탄-공기/합성가스-공기 예혼합화염의 후류 상호 작용에 대한 연구

  • Park, Jeong (Dept. of Mechanical Engineering, Pukyoung Nat'l Univ.) ;
  • Kwon, Oh Boong (Dept. of Mechanical Engineering, Pukyoung Nat'l Univ.) ;
  • Keel, Sang-In (Environment & Energy Research Division, Korea Institute of Machinery and Materials) ;
  • Yun, Jin-Han (Environment & Energy Research Division, Korea Institute of Machinery and Materials)
  • 박정 (부경대학교 기계공학과) ;
  • 권오붕 (부경대학교 기계공학과) ;
  • 길상인 (한국기계연구원 환경 에너지 기계 시스템) ;
  • 윤진한 (한국기계연구원 환경 에너지 기계 시스템)
  • Received : 2015.09.08
  • Accepted : 2015.12.16
  • Published : 2016.03.30
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Abstract

Downstream interactions between lean premixed flames with mutually different fuels of syngas and $CH_4$ have been numerically investigated particularly on and near lean extinction limits. The interaction characteristics between lean premixed (50% $H_2$ + 50% CO)-air and $CH_4$-air flames were shown to be quite different from those between the same hydrocarbon flames. The lean extinction boundaries were of slanted shape, thereby implying strong interactions. The weaker flames had negative flame speeds on the upper extinction boundaries, whereas the weaker flame speeds on the lower extinction boundaries were both negative and positive. The results also showed that the flame interaction characteristics did not follow the general tendency with the dependency of Lewis number in downstream interactions between the same hydrocarbon flames. Importance of chemical interaction in flame characteristics is discussed in the downstream interactions between lean premixed (50% $H_2$ + 50% CO)-air and $CH_4$-air flames.

Keywords

References

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