往复流多孔介质燃烧换热器热量提取的数值研究  

Numerical study of heat extraction from porous media reciprocal flow burner with embedded heat exchangers

作　　者：史俊瑞[1] 刘红[2] 李军[3] 李刚[3] 王启民[1] 

机构地区：[1]沈阳工程学院沈阳市生物质发电重点实验室,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：《热科学与技术》2009年第3期272-276,共5页Journal of Thermal Science and Technology

基　　金：辽宁省教育厅科学研究计划资助项目(2008491);辽宁省博士启动基金资助项目(20081073)

摘　　要：通过一维双温模型,研究多孔介质中的燃烧特性和换热器的热量提取。预测的气体和固体温度曲线基本上为M型分布。数值结果表明,在往复流多孔介质燃烧器系统中,甲烷的贫可燃极限可以扩展到当量比0.15。当换热器的长度从6mm增大到14mm时,热效率由0.39增加到0.61。随着换热器长度和当量比的增大,热量提取效率增大。A reciprocal flow combustor with embedded heat exchangers was studied numerically. Combustion characteristic in porous media and heat extraction by heat exchanger were examined by a one-dimensional and two temperatures numerical model. The predicted gas and solid temperatures are basically M-shaped. Results show that the lean flammability limit of the mixture of CH4 can be extended to an equivalence ratio of 0.15. At the same time, the efficiency spans the range of 0.39 0.61 when increasing the heat exchanger length from 6 to 14 ram. In addition, it is shown that the heat extraction efficiency is getting larger with increasing heat exchanger length and equivalence ratio.

关 键 词：热量提取 多孔介质 换热器 数值研究 

分 类 号：TK411.1[动力工程及工程热物理—动力机械及工程]