摘要
采用Deutschman甲烷/空气/铂氧化表面反应机理,气相反应采用GRI3.0机理,基于体积平均的双温度模型,对Pt催化的甲烷/空气在多孔介质燃烧器内的预混燃烧进行一维数值模拟,并与惰性多孔介质内预混燃烧结果进行比较.数值研究结果表明,有催化时,多孔介质内火焰面前移,且随着进口质量流率增大,火焰面前移更明显.催化使得多孔介质内温度分布更均匀,反应区内的最高温度亦低于惰性多孔介质过滤燃烧的最高值.催化剂的引入还可缩小燃烧器尺寸,有效降低污染物的排放.
Using the Deutschman CH4/air/Pt surface reaction mechanism and GRI3.0 gas phase reaction mechanism, combustion of CH4/air premixed gases in a porous medium burner with Pt catalyst was numerically studied based on the volume averaged two-temperature model. Compared with the results of the inert porous medium burner, it is found that the flame front moves forward with Pt catalyst, and becomes more evident with the increase of the mass flow rate. In the catalyzed porous media burner, both the solid and gas temperature distributions are more uniform and the maximum temperature is lower than that in the inert burner. The introduction of the catalyst can reduce the size of the burner and bring down pollutant emissions.
基金
国家自然科学基金(11172296
50936005)资助
关键词
多孔介质燃烧器
催化燃烧
燃烧特性
数值模拟
porous medium burner
catalytic combustion
combustion characteristic
numerical simulation
