摘要
在常规尺度Swiss-roll燃烧器的中心区填充多孔介质,并对其进行实验研究.通过监测燃烧器的温度和燃烧产物的变化,分析了燃烧器在不同条件下的点火启动过程特性,并得到了燃烧器的贫燃极限.结果表明:相比于在入口处点火,在中心区点火启动时达到充分燃烧的时间更短,多孔介质的温度分布更均匀;多孔介质材料性质和预混气流量对启动特性影响很大;在中心区温度为950～1200K时,可处理1.3%的天然气/空气预混气.说明该燃烧器能显著拓展燃料的贫燃极限,对低热值气体具有良好的适用性.
Porous medium was added to the central area of a conventional scale Swiss-roll combustor,and an experiment research was conducted.The starting process of the combustor under different conditions and its lean flammability characteristics were analyzed by monitoring the combustor＇s temperature development and the transformation of the combustion products.The experimental results show that,ignition at the central area takes a shorter time for complete combustion compared with that at the entering point and the temperature distribution of the porous media is more uniform;the porous media properties and that the pre-mixed gas flow rate have great influence on the startup characteristics.Furthermore,when the temperature of the combustor center is between 950 K and 1 200 K,it can burn 1.3% natural gas/air premixed gas,indicating that porous medium built-in Swiss-roll combustor can expand the fuel＇s lean flammability,and is well applicable to low-calorific gases.
基金
中国高技术研究发展(863)计划(2006AA05Z210)资助
