掺混H_(2)对CH_(4)-空气对冲扩散火焰温度和NO_(x)生成影响的数值研究  

Numerical study on the influence of H_(2)addition on flame temperature and NO_(x)production of CH_(4)-air opposed-flow diffusion flame

作　　者：吕志超 洪洋 赵国江 Lv Zhichao;Hong Yang;Zhao Guojiang(Taizhou Vocational College of Science and Technology,Taizhou 318020,China;Zhejiang Bondlye Environment Protection Technology Co.,Ltd.,Linhai 317000,China)

机构地区：[1]台州科技职业学院,浙江台州318020 [2]浙江邦得利环保科技股份有限公司,浙江临海317000

出　　处：《可再生能源》2022年第9期1144-1148,共5页Renewable Energy Resources

基　　金：国家重点研发计划资助项目(2017YFC0211200);2020年台州市科技计划项目(2003gy36)。

摘　　要：文章基于CHEMKIN软件对CH_(4)-空气对冲扩散火焰燃烧过程中掺混H_(2)对火焰温度以及NO_(x)生产量的影响进行了数值研究,分析了不同H_(2)摩尔分数和火焰拉伸率下火焰温度的变化特性以及NO_(x)的生成特性。研究结果表明:受到燃料气体传质能力和燃烧产热能力的综合影响,随着H_(2)摩尔分数的增加,混合燃料主燃烧区的峰值火焰温度点更靠近空气区;随着火焰拉伸率的增大,主燃烧区的范围变窄,反应物在燃烧区的滞留时间缩短,NO的生成受到抑制;NO_(2)和NO的摩尔分数表现出正相关的关系;随着混合燃料中H_(2)摩尔分数的增大,NO和NO_(2)的峰值摩尔分数显著增大。In this paper,the effect of H_(2) addition on the flame temperature and NO_(x)production in CH_(4)-air opposed-flow diffusion flame combustion was investigated numerically by CHEMKIN.The variation characteristics of flame temperature and NO_(x)production under different H_(2) mole fractions and different stretching rates were then analyzed.The results showed that,due to the comprehensive influence of fuel gas mass transfer capacity and combustion heat generation capacity,the peak flame temperature in the main combustion zone of mixed fuel was closer to the air zone with the increase of H_(2) mole fraction;In addition,the increased stretching rate could lead to a narrow main combustion zone,a short residence time of reactants in the combustion zone,and a suppressed NO formation;The peak mole fraction of NO and NO_(2)increased significantly with the increase of H_(2) mole fraction in the mixed fuel.And the mole fraction of NO is positively correlated to that of NO_(2).

关 键 词：合成气 扩散火焰 数值模拟 火焰温度 NO_(x) 

分 类 号：TK91[动力工程及工程热物理]