多孔介质特性参数对燃烧温度及压力影响的数值模拟研究  

Influences of Property Parameters of Porous Media on Temperature and Pressure by Numerical Simulation

作　　者：刘慧[1] 董帅[2] 幸念强[3] 李本文[2] 

机构地区：[1]东北大学材料与冶金学院,东北大学314信箱沈阳110004 [2]东北大学材料电磁过程研究教育部重点实验室,314信箱沈阳110004 [3]武汉钢铁集团鄂城钢铁有限责任公司焦化厂干熄工段,湖北鄂州436000

出　　处：《应用能源技术》2009年第12期31-37,共7页Applied Energy Technology

基　　金：国家重点基础研究发展计划973计划(2006CB601203)

摘　　要：考查了两段式多孔介质内预混气燃烧的温度与压力分布情况。建立了甲烷/空气预混气体在多孔介质内燃烧的二维数学模型,运用FLUENT软件求解瞬态控制方程的方法计算出燃烧稳定后多孔介质内的温度、与压力分布,并考查了不同当量比、多孔介质辐射衰减系数和导热系数对温度和压力分布的影响。结果表明,甲烷/空气预混气体在多孔介质中燃烧,当量比越大温度峰值越高,压力梯度越大;小孔介质辐射衰减系数的改变对温度分布和压力分布没有明显的影响,而大孔介质辐射衰减系数对温度分布和压力分布有较大的影响;增加多孔介质的导热系数,会使固相与气相温度均有所升高,燃烧区域压力降低。The combustion of methane/air mixtures in a two - section porous burner is numerically studied; the temperature and the pressure profiles are predicted. The software FLUENT is used to solve a two- dimensional transient mathematical model of the combustion. The detailed computations include the temperature and the pressure profiles. The effects of parameters like equivalence ratio, radiative extinction coefficient and thermal conductivity of the porous media on temperature and pressure profiles are investigated. The results show that： the peak of temperature and the gradient of pressure will go up with the increasing of equivalence ratio; both temperature and the pressure profiles will vary obviously with the changing of radiative extinction coefficient of the large pore porous media; the temperature of gas and porous skeleton will increase while the pressure in the combustion region will decrease with the increasing of thermal conductivity of the porous media.

关 键 词：多孔介质 燃烧 温度 压力 数值模拟 

分 类 号：TF051[冶金工程—冶金物理化学]