한국연소학회:학술대회논문집

The Korean Society of Combustion (한국연소학회)
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Analysis of NO Formation in Nonpremixed Hydrogen-Air Flames Considering Turbulence-Chemistry Interaction

난류연소 모델링을 이용한 수소-공기 비예혼합 화염의 NOx 생성 분석

  • 박양호 (서울대학교 항공우주공학과) ;
  • 문희장 (대한항공(주) 항공기술연구원) ;
  • 김성룡 (서울대학교 항공우주공학과) ;
  • 윤영빈 (서울대학교 항공우주공학과) ;
  • 정인석 (서울대학교 항공우주공학과)
  • Published : 1999.10.22
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Abstract

Numerical analysis on the characteristics of nitrogen oxides (NOx) formation in turbulent nonpremixed hydrogen-air flames was carried out. Lagrange IEM model and Assumed PDF model were applied to consider turbulence-chemistry interaction known to affect the production of NOx. Partial equilibrium assumption was used to predict nonequilibrium effect to which one-half power dependence between EINOx normalized by flame residence time and global strain rate is attributed. As a result. such one-half power dependence could be reproduced only by reaction model including $HO_{2}$and $H_{2}O_{2}$, which means its dependence on Damkohler number; nonequilibrium effect. This dependence was shown better in the region of higher global strain. Besides, the improvement of turbulence model is required to predict mean flow properties quantitatively in the radial direction.

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