Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
권호 표지

Flame- Extinguishing Concentrations of Inert Gases in Jet Diffusion Flames

제트확산화염에서의 불활성기체 소화농도

  • Ji, Jung-Hoon (School of Safety Engineering, Pukyong National University) ;
  • Lee, Eui-Ju (School of Safety Engineering, Pukyong National University)
  • 지정훈 (부경대학교 안전공학부) ;
  • 이의주 (부경대학교 안전공학부)
  • Published : 2009.02.28
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Abstract

Extinguishing limits of laminar ethylene/oxygen flames in both normal and inverse co-flow jet burner have been determined experimentally and computationally. An inert gas($N_2$, Ar, $CO_2$) was added into the oxidizer to find the critical concentration and the effectiveness of the agents on flame extinction. The experimental results showed that the physical aspect of inert gases was main mechanism for flame blow-out as same as cup burner test, but the flow effect should be considered to determine the extinction concentration. The numerical prediction was performed with modified WSR model and the result was in good agreement with the measurements. The experimental and numerical methods could be used for the assessment of various flame suppression agents such as minimum extinguishing concentration.

Keywords

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