华中科技大学学报：自然科学版2012，Vol.40Issue(12)：107-111,5.
2.5MW煤粉氧燃烧旋流火焰数值计算
Numerical calculation of 2.5 MW oxy-coal swirling flame
摘要
Abstract
To predict the oxy-coal swirling flame characteristics and main produces,the effects on these predictions by the extended eddy-dissipation models with different turbulent models was discussed.The oxy-coal combustion characteristics were numerically investigated and compared with experimental results and air-fired mode with a consistent thermal load of 2.5 MW at IFRF(International Flame Research Foundation).The wet-recycled oxy-coal combustion with pure oxygen premixed in secondary stream was dealt with and contrasted to the modified physical parameters,including oxygen mass diffusivity,emissivity,specific heat capacity,etc.The results show that the oxy-fired swirling flame temperature is similar with air-fired mode,and the stabilized flame is a flame type-Ⅱ.The EDC(eddy dissipation concept) model gives better predictions of products,especially for CO and high temperature in IRZ(internal recirculation zone) with realized k-ε model.However,the FRED(finite rate and eddy dissipation) model with two turbulent models also gives good predictions of temperature,products and flame structure.关键词
旋流火焰/氧燃烧/反应速率/火焰传播/火焰结构/烟气Key words
swirling flame/oxy-coal combustion/reaction rate/flame propagation/flame structure/flue gas分类
能源科技引用本文复制引用
刘敬樟,陈胜,柳朝晖,郑楚光..2.5MW煤粉氧燃烧旋流火焰数值计算[J].华中科技大学学报：自然科学版,2012,40(12):107-111,5.基金项目
国家重点基础研究发展计划资助项目 （）
国家高技术研究发展计划资助项目 （）
国家科技支撑计划资助项目 （）
国家自然科学基金资助项目 （）
