分级进风旋流燃烧室内湍流燃烧的数值模拟  

Numerical Simulation of the Turbulent Flow Combustion in a Staged Air Swirling-flow Combustor

作　　者：陈莹[1] 张健[1] 

机构地区：[1]清华大学工程力学系,北京100084

出　　处：《热能动力工程》2011年第1期84-88,125,共5页Journal of Engineering for Thermal Energy and Power

基　　金：内燃机燃烧学国家重点实验室开放基金资助项目(SKLE200902);国家自然科学基金资助项目(51076082)

摘　　要：应用考虑湍流-化学反应相互作用的代数二阶矩-概率密度函数(PDF)湍流燃烧模型,对分级进风旋流燃烧室内两组工况下的甲烷湍流燃烧进行了数值模拟,得到的二氧化碳浓度和气体轴向脉动速度均方根值分布与实验数据相符合,得到的气体轴向和切向速度、轴向-切向脉动速度关联量、温度和氧气浓度分布与实验数据基本相符合。研究结果表明,选取适当的二次风率可以起到优化燃烧过程的作用。By adopting the turbulent flow combustion model of an algebraic second-order moment-probability density function(PDF),which has taken into account the interaction of the turbulent flow-chemical reactions,a numerical simulation was performed of the methane turbulent flow combustion under two groups of operating regimes in a staged-air swirling-flow combustor.The distribution of the mean square root values of carbon dioxide concentration and gas axial pulsation speed being obtained corresponds to the test data.Basically so do the air axial and tangential speed,correlation value of the axial-tangential pulsation speed as well as the distribution of the temperature and oxygen concentration.The research results show that to choose a proper secondary air ratio can play a role of optimizing the combustion process.

关 键 词：分级进风 湍流燃烧 旋流燃烧室 代数二阶矩-概率密度函数湍流燃烧模型 气体速度 组分浓度 

分 类 号：TK16[动力工程及工程热物理—热能工程]