通过二维双温模型，使用甲烷详细的化学反应机理，设计了甲烷与氧气扩散燃烧器模型，并与实验值进行对比验证了其有效性。分析了小球直径，燃料质量分数等对火焰高度的影响。结果表明:火焰高度随着入口流速和甲烷质量分数的增大而增大；随着小球直径、固体导热系数、分子扩散系数和质量弥散系数的增大而减小。与预混气体过滤燃烧相比，扩散过滤燃烧的反应区域的气体和固体的温度分布是不同的，二者之间的最大温差达到188 K。

A numerical study of the diffusion filtration combustor was conducted with detailed chemistry mechanism and two-dimensional, two-temperature model. The model was validated with available experimental data. The influences of particle diameter, fuel mass fraction and dispersion on the flame height were analyzed. Simulation results showed that the flame height increases with inlet velocity and mass fraction of fuel, and decreases with the decrease in the particle diameter, solid thermal conductivity, effective molecular diffusion coefficient and mass dispersion coefficient.

TK224.1+1

国家自然科学基金（51476105,51406123）