多孔介质内预混合燃烧的二维数值模拟  

Two-dimensional numerical simulation of the combustion of the premixed gas in a porous medium

作　　者：刘宏升[1] 张金艳[1] 解茂昭[1] 

机构地区：[1]大连理工大学能源与动力学院,辽宁大连116024

出　　处：《哈尔滨工程大学学报》2014年第7期814-819,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(201101057);中央高校基本科研业务费专项资金资助项目(DUT13JN06);中国石油科技创新基金资助项目(2013D-5006-0208)

摘　　要：为了研究预混气在多孔介质内过滤燃烧特性,根据多孔介质燃烧理论,建立了甲烷/空气预混气在堆积床内燃烧的二维双温模型。给出了当量比、入口速度和小球直径等参数对温度分布的影响,分析了燃烧器内氧化铝小球的蓄热特性。结果表明:火焰面的前缘呈抛物线形状,燃烧波波速在0.1 mm/s数量级;随着当量比增加,波速度减小,燃烧区域范围扩大;随着入口流速增大,燃烧最高温度升高,火焰面宽度变窄,燃烧波波速增大;随着氧化铝小球直径增大,火焰面厚度变窄,燃烧波速度增大;氧化铝小球在过滤燃烧中体现出良好的蓄热能力。In order to study the premixed filtration combustion characteristics of a porous medium, a two-dimensional combustion model of premixed gas in a porous medium was established based on the theory of porous medium combus-tion. The influences of the equivalence ratio, the intake velocity and the spherule diameter on temperature distribution were discussed. The heat storage properties of the alumina spherule in the burner were analyzed. The results show that the front edge of the flame presents a parabola structure and the combustion wave velocity has an order of 0.1 mm/s. The burning area extends and the combustion wave velocity decreases with the increasing of the equivalence ratio. Higher peak temperature, narrower flame width and faster combustion wave velocity occur as the inlet velocity increa-ses. The flame width gets narrower and the combustion wave velocity increases with the increasing of the spherule di-ameter. The alumina spherule shows a good heat storage capacity in the premixed filtration combustion.

关 键 词：多孔介质 过滤燃烧 二维数值模拟 蓄热 当量比 

分 类 号：TK411.1[动力工程及工程热物理—动力机械及工程]