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三种典型低热值气体燃料的层流火焰速度测量

, PP. 74-80

Keywords: 低热值,层流火焰速度,热流量法,当量比,绝热火焰

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Abstract:

实验采用热流量炉方法,在常温常压下对3种典型低热值气体(生物质气化合成气、煤气化合成气、高炉煤气)以及甲烷和合成氨驰放气的层流火焰速度进行了测量。所测气体的当量比从0.62变化到2.09。另外,通过Chemkin对实验气体的层流火焰速度进行了模拟计算。对比实验值和计算值,发现两者非常接近。比较不同种类气体的实验结果和模拟计算结果显示:由于所测低热值气体具有较低的低位发热量,其层流火焰速度普遍较低,在当量比1处,大约为20cm/s;H2对层流火焰速度具有很大的影响,几种低热值气体中H2含量越高,其层流火焰速度越大;另外,低热值气体中的CO直接影响层流火焰速度的峰值当量比,使其偏离1,位于比较富燃的区域。

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