김종수 S.Sreedhara 허강열 양원 2024-01-20T23:34:20Z 2024-01-20T23:34:20Z 2021-09-06 2008-03 1226-0959 https://pubs.kist.re.kr/handle/201004/133686 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. Korean 한국연소학회 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 Article 2 한국연소학회지, v.13, no.1, pp.31 - 43 한국연소학회지 13 1 31 43 kci other ART001240951 Oxy-fuel combustion detailed chemistry. numerical simulation two-zone structure Conditional moment closure(CMC) model