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在煤炭工业中,瓦斯爆炸事故经常发生,造成了巨大的人员伤亡以及材料性能的破坏。在研究瓦斯爆炸机理过程中,火焰前端传播速度是最重要的因素之一。根据中北大学水平管道实验装置设计了一套火焰速度测量系统,用于研究在密闭管道内圆环障碍物的数量和阻塞比对火焰传播速度的影响。结果表明,障碍物对瓦斯爆炸产生的火焰具有明显的加速作用。随障碍物数量和阻塞比的增加,火焰加速更加明显且持续更剧烈。其中,障碍物数量对火焰加速持续的作用更大,而障碍物阻塞比的作用不明显。
In the coal industry, gas explosion accidents often occur, causing huge casualties and the destruction of material performance. In studying the mechanism of gas explosion, the propagation speed of flame front is one of the most important factors. A set of flame velocity measurement system was designed according to the experimental set-up of horizontal pipelines of North China University to study the influence of the number of obstructions and the obstruction ratio on the propagation velocity of flame in a closed pipe. The results show that the obstacles have obvious accelerating effect on the flame produced by gas explosion. With the increase in the number of obstructions and the obstruction ratio, the flame acceleration is more obvious and continues to be more intense. Among them, the number of obstacles on the flame continued to play a greater role, while the obstruction of the role of obstruction is not obvious.