Abstract:

The energy accumulation in the reaction zone of lean premixed combustion in porous media was analyzedDimensionless excess enthalpy function was theoretically derived based on a onedimensional, twotemperature modelIt was shown that the superadiabatic temperature was controlled by the combined effect of the modified Lewis number, the thermal conductivity ratio between solid and gas phases, the porosity of packed bed and the dimensionless combustion wave speedAn examination of the four source terms in the H-equation indicated that the modified Lewis number was the dominant one among the four terms and basically determined the distribution of the excess enthalpy function.

Key words:

超绝热燃烧, 多孔介质, 过剩焓函数

摘要：

分析了稀预混气体多孔介质中超绝热燃烧反应区的能量集中现象。通过一维双温模型理论上推导出量纲1过剩焓函数。分析表明，超绝热燃烧温度是修正的Lewis数、固体和气体热导率的比值、填充床孔隙率以及量纲1燃烧波波速的综合函数。通过对量纲1焓方程4个源项的分析表明，修正的Lewis数主导源项的大小并决定焓值的分布。

关键词:

超绝热燃烧, 多孔介质, 过剩焓函数