氨气-氢气富燃湍流旋转火焰的大涡模拟  

Large Eddy Simulation of Rich Ammonia-Hydrogen Turbulent Swirling Flame

作　　者：程康 王平 毛晨林 Valera-Medina Agustin 王永倩 杨证淳 刘文锋 田飞[3] Cheng Kang;Wang Ping;Mao Chenlin;Valera-Medina Agustin;Wang Yongqian;Yang Zhengchun;Liu Wenfeng;Tian Fei(Institute for Energy Research,Jiangsu University,Zhenjiang 212013,China;School of Engineering,Cardiff University,Cardiff CF243AA,United Kingdom;School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学能源研究院,镇江212013 [2]英国卡迪夫大学工程学院,英国卡迪夫CF243AA [3]江苏大学能源与动力工程学院,镇江212013

出　　处：《燃烧科学与技术》2023年第5期561-568,共8页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(91741117).

摘　　要：为研究氨-氢掺混燃烧特性,利用动态增厚火焰(DTF)燃烧模型,对英国卡迪夫大学燃气轮机模型燃烧室中的一个当量比为1.2、氨-氢掺混体积比为1∶1的湍流旋转火焰进行了大涡模拟(LES)计算,同时结合预混层流火焰和化学反应网络(CRN)方法进行综合分析.LES分析表明:燃烧室中存在一个大的回流区,其质量回流率随轴向距离而改变,最大值可达65%;燃烧室中的NO主要经由N+OH→NO+H生成,NO与温度、OH之间存在着正相关性.在NO的排放预测方面,无论是预混层流火焰的计算结果还是CRN计算结果,均与LES预测的湍流场中结果存在不小的差异,其原因可归结于两者的简化分析方法未能准确描述复杂流场中的湍流-化学反应相互作用关系.In order to study the combustion characteristics of ammonia-hydrogen blending fuel,large eddy simu-lation(LES)with dynamic thickened flame(DTF)combustion model was performed to calculate an ammoniahydrogen turbulent swirling flame,whose equivalence ratio is 1.2,in a gas turbine model combustor of Cardiff University,UK.The volume ratio of ammonia-hydrogen is 1∶1.Additionally,premixed laminar flame calculation and chemical reaction network(CRN)were used to analyze NO emission.LES analysis shows that there is a large recirculation zone in the combustion chamber,and mass recirculation rate changes with the axial location,whose maximum value is about 65%;NO in the combustion chamber is mainly generated through N+OH→NO+H,which is positively correlated with temperature and OH.A big difference is found in NO emission prediction between the calculation results of the premixed laminar flame and the CRN and those of LES in the turbulent flow field.The reason can be attributed to the fact that their simplified analysis methods fail to accurately describe the interaction between turbulence and chemical reaction in complex flow field.

关 键 词：氨气-氢气掺混燃烧 旋转湍流火焰 大涡模拟 化学反应网络方法 NO排放 

分 类 号：TK16[动力工程及工程热物理—热能工程]