基于过剩焓函数多孔介质中超绝热燃烧的分析  

Analysis of super-adiabatic combustion in porous media by excess enthalpy function

作　　者：史俊瑞[1] 解茂昭[2] 李军[3] 李刚[3] 

机构地区：[1]沈阳工程学院沈阳市循环流化床燃烧技术重点试验室,辽宁沈阳110136 [2]大连理工大学能源与动力学院,辽宁大连116024 [3]大连大学建筑工程学院,辽宁大连116622

出　　处：《化工学报》2009年第6期1385-1389,共5页CIESC Journal

基　　金：国家自然科学基金项目(50476073);辽宁省教育厅科学研究计划项目(2008491);辽宁省博士启动基金项目(20081073)~~

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。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.

关 键 词：超绝热燃烧 多孔介质 过剩焓函数 

分 类 号：TK411.1[动力工程及工程热物理—动力机械及工程]