Movement of Flame Fronts in a Turbulent Premixed V Flame
Movement of Flame Fronts in a Turbulent Premixed V Flame
复制标题
湍流预混 V 型火焰中火焰锋面的运动
DOI：
10.1299/kikaib.72.2279
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
F. Williams
中科院分区：
文献类型：
--
作者：
J. Furukawa;H. Hashimoto;F. Williams
本文研究了湍流预混V形火焰中火焰锋面在两个位置的三维运动。例如，湍流火焰刷中最高位置和最高位置的半高。在V型火焰中，未燃烧的混合物在燃烧器的外侧，已燃烧的气体在燃烧器的内侧。平均气体流量是从内侧到外侧，因为平均气体膨胀不仅向上发生，而且向外发生。当火焰前锋沿未燃到已燃方向移动时，它是从内侧向外侧移动的，跟随着气体流动。当火焰前锋在燃烧到未燃烧的方向上移动时，它逆着气流从外侧移动到内侧。其结果是，在未爆炸到燃烧方向的火焰前锋的速度矢量的大小大于那些在燃烧到未燃烧方向。在未燃烧到燃烧的方向上的火焰前缘的速度的轴向分量可以是负的。
3-D Movement of Flame Fronts in a Turbulent Premixed V Flame has been examined at two positions, i. e., the highest position and half height of the highest posion in the turbulent flame brush. In the V flame, the unburnt mixture in the outer side and the burnt gas is in the inner side of the burner. The average gas flow is from the inner side to the outer side because of the average gas expansion occuring not only upward but also outward. When the flame front moves in the unburnt-to-burnt direction, it moves from the inner side to the outer side, follow the gas flow. When the flame front moves in the burnt-to-unburnt direction, it moves from the outer side to the inner side, against the gas flow. As the result, the magnitude of the velocity vectors of the flame front in the unburst-to-burnt direction are larger than those in the burnt-to-unburnt direction. The axial component of the velocity of the flame front in the unburnt-to-burnt direction can be negative.