한국연소학회지 (Journal of the Korean Society of Combustion)
- 제13권1호
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- Pages.31-43
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- 2008
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- 1226-0959(pISSN)
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- 2466-2089(eISSN)
CMC 모델 기반 수치해석을 사용한 순산소 난류확산화염 구조 연구
A Study on the Structure of Turbulent non-Premixed Oxy-fuel Flame Using CMC Model-based Simulation
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Kim, Jong-Soo
;
- Sreedhara, S. ;
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Huh, Kang-Yeol
;
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Yang, Won
- 발행 : 2008.03.31
초록
Oxy-fuel flame has a significantly different structure from that of air-fuel flame because of its high temperature. This study is aimed to find out the difference of the oxy-fuel flame structure in order to understand reaction mechanism closely, which is crucial to design real-scale oxy-fuel combustion system. By examining pictures of counterflow flame and LIF images, we found that oxy-fuel flame had two-zone structure: fuel decomposition region and distributed CO oxidation region. In the oxy-fuel flame, OH radical was distributed intensely through the whole flame due to its higher flame temperature than crossover temperature. For showing those features of the oxy-fuel flame, 1 MW scale IFRF oxy-natural gas burner was simulated by conditional moment closure(CMC) model. Calculation results were compared with experimental data, and showed agreements in trend. In the simulated distributions of fuel decomposition/CO oxidation rates, CO oxidation region was also separated from fuel decomposition zone considerably, which showed the two-zone structure in the oxy-fuel flame.
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