回転流中に形成されるブンゼン火炎先端部の振動特性 : 熱工学,内燃機関,動力など
回転流中に形成されるブンゼン火炎先端部の振動特性 : 熱工学,内燃機関,動力など
复制标题
旋转流中形成的本生焰尖的振动特性：热工、内燃机、动力等。
DOI：
10.1299/kikaib.67.1529
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
利久 植田
中科院分区：
文献类型：
--
作者：
浩明 後藤田;利久 植田
对带有燃烧器旋转的本生型预混火焰的火焰尖端振荡进行了实验研究。甲烷/空气混合物和丙烷/空气混合物被用来考虑Lewis数的影响。用激光层析成像技术显示了未燃烧混合物的横截面图像。通过可视化图像测量了火焰尖端位置、火焰曲率和热扩散区厚度随时间的变化。当火焰尖端摆动时，火焰曲率和预热区厚度沿中心线呈周期性变化。研究还表明，无论火焰尖端向上或向下移动，火焰尖端相同位置处的火焰曲率值都不同。换句话说，火焰尖端是以滞后的方式振荡的。这表明火焰尖端的瞬时燃烧强度随滞后而周期性变化，从而导致周期性振荡。
Flame tip oscillation of a Bunsen type premixed flame with burner rotation is experimentally investigated. Methane/air mixture and Propane/air mixture are used to take into account the effect of Lewis number. Cross sectional images of unburnt mixture are visualized by a laser tomographic technique. Time variations of flame tip location, flame curvature and thermodiffusive zone thickness are measured from visualized images. As the flame tip is oscillated, the flame curvature and the preheat zone thickness along the centerline are varied periodically. Furthermore, it is shown that values of the flame curvature at the same location of the flame tip are different whether the flame tip moves upward or downward. In other words, the flame tip oscillates with a hysteresis. This suggests that the instantaneous burning intensity at the flame tip varies periodically with the hysteresis, which results in the periodical oscillation.