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为了解空气槽对平板微型双通道螺旋型过量焓燃烧器(Swiss-roll燃烧器)工作特性的影响,采用甲烷/空气预混气,在带有空气槽和没有空气槽的平板Swiss-roll燃烧器中进行燃烧实验。实验结果表明:空气槽有助于扩展微燃烧器的可燃极限,使燃烧器在更大的空气过量系数和更小的甲烷流量下工作,同时增加了燃烧器外壁的温度梯度。另外,对带有空气槽的微燃烧器进行了数值模拟。数值结果表明,高温燃气对未燃混合物有很强的加热作用,一方面使预混火焰面发生倾斜,另一方面使预混火焰在微燃烧器内部的位置随着流速、空气过量系数、外界散热的变化而变化。
To understand the effect of the air slot on the operating characteristics of a flat panel micro-twin spiral over-enthalpy burner (Swiss-roll burner), a methane / air premix gas was used in a flat Swiss-roll with air tank and no air tank Burner experiment. The experimental results show that the air tank helps to expand the combustible limit of the micro-combustor, and enables the burner to work with larger air excess coefficient and smaller methane flow while increasing the temperature gradient of the outer wall of the combustor. In addition, micro-burners with air slots were numerically simulated. The numerical results show that the high temperature gas has a strong heating effect on the unburned mixture. On the one hand, the premixed flame surface is tilted. On the other hand, the position of the premixed flame in the micro-burner varies with the flow rate and air excess coefficient, Change the heat changes.