메탄/공기 예혼합화염에서의 수소첨가에 의한 소염 및 NOx 발생특성에 관한 수치해석 = Numerical Analysis of the Extinctionand NOx Emission in Methane/AirPremixed Flame by Hydrogen Addition

다국어 초록 (Multilingual Abstract)

Lean premixed combustion is a well known method for low NOx gas turbine combustor. But lean combustion is usually accompanied by flame instability. To overcome this problem, the hydrogen (H2) was added to main fuel methane to increase flammable limit. In this paper, the effects of hydrogen addition on lean premixed combustion of methane (CH4) were investigated numerically. Results showed that the extinction stretch rate increases and the extinction temperature constant with relatively small amount of H2 addition. The flame temperature and NO emission increase with H2 addition at the same stretch rate and equivalence ratio but it could increase the range of lean extinction and extinction equivalence ratio limit. Eventually, the H2 addition case showed almost same or lower NO emission than no addictive CH4 case in the extinction condition.

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