CAJ | 학술논문

针对富氧燃烧方式下由高体积分数水蒸气和CO2混合构成的烟气辐射传热难题,推导出描述非灰气体辐射特性的宽带关联k分布模型与离散坐标法相结合的计算公式.以文献中O2/CO2燃烧方式下炉内水蒸气和CO2的生成为例,采用宽带关联k分布模型计算了不同算例下混合气体的辐射强度和壁面热流量,并与统计窄谱带模型、全光谱关联k分布模型以及灰体加权和模型的计算结果进行了比较.结果表明：宽带关联k分布模型与统计窄带模型的计算结果吻合较好;与文献中的两个模型进行了对比,其计算精度有所提高,并且对混合气体的处理更加简便灵活,适用于O2/CO2燃烧方式下烟气辐射特性的计算.
침대부양연소방식하유고체적분수수증기화CO2혼합구성적연기복사전열난제,추도출묘술비회기체복사특성적관대관련k분포모형여리산좌표법상결합적계산공식.이문헌중O2/CO2연소방식하로내수증기화CO2적생성위례,채용관대관련k분포모형계산료불동산례하혼합기체적복사강도화벽면열류량,병여통계착보대모형、전광보관련k분포모형이급회체가권화모형적계산결과진행료비교.결과표명：관대관련k분포모형여통계착대모형적계산결과문합교호;여문헌중적량개모형진행료대비,기계산정도유소제고,병차대혼합기체적처리경가간편령활,괄용우O2/CO2연소방식하연기복사특성적계산.
A discrete ordinate method coupled with wide band correlated-k（WBCK） distribution model was developed to calculate the radiation characteristics of non-gray gas mixtures from oxygen-enriched combustion including high volumetric fractions of water vapor and carbon dioxide.Taking the gas mixture of water vapor and carbon dioxide formed in furnace of a coal-fired boiler at O2/CO2 combustion mode as an object of study,the radiation intensity and wall flux predicted with WBCK model were compared with that of statistical narrow band model,full-spectrum correlated-k model and weighted-sum-of-grey-gases model.Results show that the calculation results of WBCK model agree well with that of statistical narrow band model.Compared with above other two models,the WBCK model is more accurate in calculation and facile in handling of gas mixtures,which therefore is suitable for calculation of gas radiation characteristics at O2/CO2 combustion mode.