对底部加热、间距为2 mm、半径为25 mm的径向微通道中甲烷/空气的预混燃烧进行了系统的实验研究,通过高速数码摄像机发现了圆形的稳定火焰和非稳定火焰、透平叶片形旋转火焰、移动式火焰以及三分叉旋转火焰等多种火焰形态,在此基础上得到了以预混气进口速度和当量比为坐标的火焰形态谱图,表明火焰形态的形成与预混气进口速度和当量比之间有着密切的关系.对燃烧产物的测试和分析证实了燃烧效率的高低与火焰形态之间有着直接的联系.
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