高温空气对燃烧回流区流动影响的数值模拟  

Numerical simulation on the influence of air flow at high temperature on combustion backflow section

作　　者：吕军[1] 唐一科[1] 欧阳奇[1] 

机构地区：[1]重庆大学机械工程学院,重庆400044

出　　处：《钢铁研究》2008年第1期55-58,62,共5页Research on Iron and Steel

摘　　要：通过建立圆管状燃烧室内甲烷气体燃烧的数学模型,对燃烧室回流区的温度场、速度场、流场以及甲烷、氧气、二氧化碳以及氮氧化合物的质量分数进行了数值模拟。通过改变入口高温空气的预热温度,数值模拟了以上变量的分布规律。研究结果表明:提高空气的预热温度,燃烧室内的反应进行越彻底,温度分布更均匀。研究结果对燃烧室的设计和燃烧室工况分析具有指导意义,所建立的数学模型为燃烧室几何及结构设计和燃烧过程操作中进行定量分析的有效手段。In this paper, a mathematical model of methane combustion in tubular chamber is established. The temperature field, velocity field, flow field and mass fraction of methane, oxygen, carbon dioxide and oxy-nitride in reflux area of combustion chamber are simulated with the model. The increase of preheating temperature of entry hot-air can accelerate the combustion reaction and make the temperature distribution more uniform. These research results can be used as guidance for chamber design and working condition analysis. The mathematical model is an efficient tool in the chamber design and quantitative analysis in combustion process.

关 键 词：燃烧室 数值模拟 工况分析 高温空气 

分 类 号：TK16[动力工程及工程热物理—热能工程]