Journal of the Korean Institute of Gas (한국가스학회지)

The Korean Institute of GAS (한국가스학회)
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A Study of Correlation between Flame Propagation Velocity and Scalar Dissipation Rate for a Liftoff Flame

부상화염에서 화염전파속도와 스칼라소산율의 상호 관계에 관한 연구

  • Ha, Ji-Soo (Energy and Environmental Science, Keimyung University) ;
  • Kim, Tae-Kwon (School of Mechanical & Automotive Engineering, Keimyung University)
  • 하지수 (계명대학교 에너지환경과학과) ;
  • 김태권 (계명대학교 기계자동차공학부)
  • Published : 2009.06.30
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Abstract

A numerical analysis of reactive flow in a liftoff flame is accomplished to elucidate the characteristics of liftoff flame. To verify reliance of numerical calculation, the liftoff heights of liftoff flame for various fuel exit velocities are compared between the existing experimental research results and the present calculation results. The flame propagation velocity is conducted at the flow redirection point which is on a stoichiometric line ahead of flame front. This point was selected constant distance from triple point regardless of fuel exit velocity at the previous research. This causes considerable errors for the flame propagation velocity and scalar dissipation rate. The main issue of the present research is to establish the resonable method to select the redirection point and so that to clarify the relationship between flame propagation velocity and scalar dissipation rate, which is the core properties in a triple flame stability.

부상화염에 대한 연소반응 유동 수치해석을 수행하여 부상높이에 대한 기존 연구 결과들과 비교를 통하여 수치해석 결과의 신뢰성을 검정하였다. 화염전파속도를 결정하는 유동방향변환점을 기존의 연구에서처럼 연료분출속도에 상관없이 일률적인 위치로 선정할 경우 많은 오차를 유발하기 때문에 본 연구에서는 부상화염에서 이론당량비선을 따라 유동속도와 스칼라 소산율 특성을 살펴보았고 화염전파속도를 선정하는 유동방향변환점을 타당하게 선정하는 방법을 정립하였다. 이를 토대로 화염전파속도와 스칼라소산율의 관계식을 도출하여 부상화염에서 화염전파속도 특성을 규명하였다.

Keywords

References

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