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在全透明的火焰加速管中,利用火焰加速系统和高速摄像系统,对管道中瓦斯火焰诱导沉积煤尘参与燃烧和爆炸的机理进行了实验研究。讨论了障碍物的特征尺寸和瓦斯浓度对火焰传播速度的影响。实验结果表明:当有障碍物存在时,瓦斯煤尘火焰的传播速度迅速提高,且障碍物的特征尺寸越大,火焰传播速度越快,瓦斯浓度越接近化学当量比,瓦斯煤尘火焰的传播速度越大。
In the completely transparent flame accelerating tube, the flame accelerating system and the high-speed camera system are used to experimentally study the mechanism of gas flame induced deposition of coal dust in combustion and explosion in pipeline. The influence of the characteristic size of the obstacle and the gas concentration on the flame propagation velocity is discussed. Experimental results show that when there is an obstacle, the propagation speed of flame of gas coal dust increases rapidly, and the larger the size of the obstacle, the faster the flame propagation, the closer the gas concentration is to the stoichiometric ratio, and the propagation of flame of coal dust The greater the speed.