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采用平面激光诱导荧光(PLIF)、高温热电偶及红外气体分析仪,对不同当量比下的合成气在双旋流模型燃烧室内的火焰特征进行了试验研究.结果表明:当量比为0.2时,合成气火焰的反应区呈月牙形,随着当量比的增大,合成气火焰根部逐渐出现M型分布特征,火焰锋面的内、外侧张角均单调减小,火焰推举高度与穿透深度增大,同时,燃烧室中下游出现大量的反应区,火焰根部受到压缩,燃烧室排气温度升高,CO排放量迅速降低.
The flame characteristics of syngas at different equivalence ratios in a double swirl model combustor were studied by using planar laser induced fluorescence (PLIF), high temperature thermocouple and infrared gas analyzer.The results showed that when the equivalent ratio was 0.2, The reaction zone of the syngas flame is crescent-shaped. With the increase of the equivalence ratio, the M-shaped distribution of the flame root gradually appears in the syngas flame. The flaring angles of the flames face monotonously decrease, In the meantime, a large number of reaction zones appear in the middle and lower reaches of the combustion chamber, the root of the flame is compressed, the exhaust temperature of the combustion chamber increases, and the CO emission rapidly decreases.