Flame Stabilization Mechanism of a Micro Cyclone Combustor

마이크로 사이클론 연소기의 화염 안정화 기구

  • 오창보 (한국기계연구원, 에너지기계연구센터) ;
  • 최병일 (한국기계연구원, 에너지기계연구센터) ;
  • 한용식 (한국기계연구원, 에너지기계연구센터) ;
  • 김명배 (한국기계연구원, 에너지기계연구센터) ;
  • 황철홍 (인하대학교 기계공학부)
  • Published : 2007.05.04

Abstract

A micro cyclone combustor was developed to be used as a component of mobile power generator (MPG). The cyclone combustor was designed so that fuel and air were supplied to the combustion chamber separately to prevent a flash-back. The flame shape stabilized inside the micro cyclone combustor was visualized experimentally and the flow field and the combustion characteristics of the combustor were investigated numerically. The global equivalence ratio (${\Phi}$), defined using the fuel and air flow rates, was introduced to examine the overall flow and flame features of the combustor. The flame stabilization mechanism could be well understood using the velocity distribution inside the combustor. For only non-reacting case, it was found that a weak recirculating zone was formed upper the fuel-supplying tube in case of ${\Phi}$ < 1.0. It was also found that small regions that have a negative axial velocity exist near the fuel injection ports for both of non-reacting and reacting case. It was identify that a flame front was stabilized at the negative axial velocity regions near the fuel injection ports.

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