Journal of the Korean Society of Combustion (한국연소학회지)

The Korean Society of Combustion (한국연소학회)
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Formation of MILD Combustion using Co-flow MILD Combustor

동축류 마일드 연소기를 적용한 마일드 연소 형성 연구

  • Lee, Pil Hyong (Division of Mechanical System Engineering, Incheon National University) ;
  • Hwang, Sang Soon (Division of Mechanical System Engineering, Incheon National University)
  • 이필형 (인천대학교 기계시스템공학부) ;
  • 황상순 (인천대학교 기계시스템공학부)
  • Received : 2016.11.05
  • Accepted : 2017.06.11
  • Published : 2017.09.30
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Abstract

MILD combustion was first developed to suppress thermal NOx formation in combustor for heating industrial furnaces. In this paper, the effect of co-flow MILD combustor geometry and operating conditions on the formation of MILD combustion was analyzed using 3 dimensional numerical simulation. The numerical simulations were carried out using ANSYS Fluent. The combustion and turbulence flow was modeled using the Eddy Dissipation Concept(EDC) model and realizable $k-{\varepsilon}$ model respectively. The results show that the high temperature region and average temperature decreased due to an increase in the air velocity and decrease the wall thickness of fuel nozzle. In particular, the MILD combustion flame was found to be stable with a combustion flame region at fuel velocity 10 m/s, air velocity 20 m/s, fuel nozzle thickness 1.0 mm, equivalence ratio 0.9, and outlet area ratio 40%.

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