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利用粒子图像速度场测量技术(PIV)对不同CO/H_2下的合成气旋流燃烧流场进行了实验研究。由所测合成气旋流燃烧火焰的速度场可知:合成气旋流燃烧火焰中,轴向平均速度最大值出现在喷嘴中心轴线处,轴线两侧还会有个小的峰值;随着与喷嘴表面距离的增大,最大轴向平均速度不断减小,轴侧峰值与轴线距离不断增大。对比不同CO/H_2下火焰内部的速度分布可知,CO/H_2是影响合成气旋流火焰流动结构的一个重要参数,随着CO/H_2比的增大:旋流火焰内部的燃料涡与喷嘴表面距离先增大后缓慢降低,与喷嘴轴线距离也是先增大后减小;轴向平均速度最大峰值不断增加,轴侧峰值大小基本不变。
The flow field of swirling combustion of syngas with different CO / H 2 was experimentally studied by particle image velocity field measurement (PIV). From the measured velocity field of swirling combustion flame of syngas, it can be seen that in the swirling flame of syngas, the maximum axial average velocity appears at the central axis of the nozzle with a small peak on both sides of the axis. With the distance from the nozzle surface The maximum axial average speed decreases continuously, and the axial peak and axis distance increase continuously. Comparing the velocity distribution inside the flame with different CO / H 2, CO / H 2 is an important parameter that influences the flow structure of swirling flame in syngas. With the increase of CO / H 2 ratio, the fuel vortex and the nozzle surface distance First increase and then slow down, and the axis of the nozzle is also increased after the first decrease; the maximum average peak axial velocity increases continuously, the basic axial peak size remains unchanged.