【摘要】 采用非预混燃烧模型与组分传输的一步反应模型,模拟了甲烷燃烧及NOx的生成,得出燃烧温度场、NO生成情况。模拟结果表明:采用非预混燃烧模型模拟时结果更接近实测值,模拟更准确;甲烷扩散燃烧时NO产生区域主要集中在高温火焰后侧,在前部低温区基本没有NO生成;燃烧中P-NO生成量比T-NO量小两个数量级,NO产生几乎完全被热力型NO机制支配,在燃烧过程中应特别注意高温区域的影响。更多还原

【Abstract】 Temperature fields and NOx generation in combustion processes of methane were simulated,using non-premixed combustion model and one-step chemical reaction of species translation model,respectively.The results show that : the non-premixed combustion model is the better one for methane combustion,NO generation field in diffusion combustion processes of methane lies behind high temperature flame,The thermal NO is dominant in NO generation while the instantaneous NO is much less,so NOx generation in combustion processes of methane has the closest connection with the high temperature region.更多还原