双层多孔介质燃烧器的数值模拟  

Numerical Investigation of Premixed Combustion Within a Two-layer Porous Burner

作　　者：赵平辉[1] 朱旻明[1] 张根烜[1] 陈义良[1] 姜海[1] 

机构地区：[1]中国科学技术大学热科学和能源工程系,安徽合肥230027

出　　处：《计算物理》2006年第6期679-684,共6页Chinese Journal of Computational Physics

基　　金：国家自然科学基金(50206021);国家自然科学基金(50376060)资助项目

摘　　要：考虑多孔固体构架的辐射换热以及气固相间的对流换热,引入弥散效应及相间对流换热系数,使用GRI 3.0机理和双通量辐射模型,数值求解双层多孔介质内燃烧过程.分析了双层多孔介质燃烧器内火焰稳定性和污染物排放,并与单层的进行比较.结果表明,双层多孔介质燃烧器能够在较宽的流量范围内将火焰稳定在它的交界面附近.CH4/Air premixed combustion within a two-layer porous medium burner is numerically simulated in a laminar combustion model. Heat exchanges with radiation in the solid and with convection between the gas and the solid are considered, A detailed reaction mechanism GRI 3.0 is used and a dispersion formula is added to the equations. The stabilization of the flame and the emission output are investigated. The results are compared with those of a one-layer burner. It is concluded that a two-layer burner has wider flux range in stabilizing the flame nearby the two-layer porous medium interface.

关 键 词：单层多孔介质燃烧器 双层多孔介质燃烧器 火焰传播速度 超绝热火焰温度 孔径(PD) 

分 类 号：TK16[动力工程及工程热物理—热能工程]