化学反应机理和弥散效应对多孔介质内燃烧过程的影响  

Investigation of combustion in a porous medium for different reaction mechanisms and dispersion effects

作　　者：赵平辉[1] 陈义良[1] 刘明侯[1] 张根烜[1] 丁敏[1] 

机构地区：[1]中国科学技术大学热科学与能源工程系,安徽合肥230027

出　　处：《中国科学技术大学学报》2006年第10期1051-1056,共6页JUSTC

基　　金：国家自然科学基金(50206021;50376060)资助

摘　　要：采用一维反应流模型,考虑不同的化学反应机理和弥散效应的影响,数值求解多孔介质内的燃烧过程.通过对火焰结构,火焰传播速度及污染物的计算与分析,得到了不同机理的优缺点及适用范围,分析了弥散效应的影响.结果表明,当量比较小时,化学反应机理和弥散效应的影响不大;当量比较大时,结果差别较大,需要仔细选择化学反应机理和考虑弥散效应.One-dimensional reacting fluid model was used to simulate the combustion process with different reaction mechanisms. The advantages and disadvantages as well as the applicability of various mechanisms were obtained by analyzing flame structure, flame propagation speed and emissions. Dispersion was also analyzed. It is concluded that reaction mechanisms and dispersion do not affect the results much with a lower equivalence, while with a larger equivalence ratio, the results are affected greatly. Therefore, prudence is needed when considering reaction mechanisms and dispersion effects.

关 键 词：多孔介质 超绝热火焰温度 火焰传播速度 化学反应机理 弥散效应 

分 类 号：TK16[动力工程及工程热物理—热能工程]