不同管道瓦斯火焰传播特性研究

发布时间：2018-01-30 21:12

本文关键词： 瓦斯爆炸障碍物阻塞比火焰压力前驱压力　出处：《安徽理工大学》2013年硕士论文　论文类型：学位论文

【摘要】：我国是煤炭生产和消费大国,然而煤矿安全事故时有发生,其中瓦斯爆炸事故严重威胁着人民的生命财产和企业的安全生产。因此研究瓦斯火焰传播规律对预防和减少瓦斯爆炸事故的发生以及防爆、抑爆装置的开发具有理论指导和实用价值。本文通过自行设计管道装置研究瓦斯火焰压力在管道中的传播规律。在不锈钢直管道中,通过改变障碍物的形状、阻塞比、距点火端位置,研究障碍物对火焰传播规律的影响,得到了在不同障碍物条件下的火焰压力和前驱压力波压力参数。研究结果发现,圆形障碍物火焰峰值压力比方形障碍物大,火焰峰值压力随阻塞比增大先增大后减小,放置在管道中间障碍物产生的火焰峰值压力比放置在管道两端的障碍物大。前驱压力波压力传播规律与火焰压力整体上相似。研究了在直角和三通管道中火焰压力传播规律。在直角管道中,火焰压力先增大后减小,其中火焰压力在通过直角弯管一段距离后达到最大,之后火焰压力开始下降。在三通管道中,火焰压力也是通过三通分叉处一段距离后达到最大,两种不同开口端点火方式产生的火焰峰值压力不等。
[Abstract]:China is a large country of coal production and consumption, but coal mine safety accidents occur from time to time. The gas explosion accident seriously threatens the life and property of the people and the safety production of enterprises. Therefore, the study of the law of gas flame transmission to prevent and reduce the occurrence of gas explosion accidents and explosion prevention. The development of explosive suppression device has theoretical guidance and practical value. In this paper, the propagation law of gas flame pressure in the pipeline is studied by self-designed pipeline device. In the stainless steel straight pipe, by changing the shape of the obstruction, blocking ratio, the location from the igniting end. The influence of obstacles on flame propagation is studied, and the flame pressure and pressure-wave pressure parameters under different obstacle conditions are obtained. The results show that the peak flame pressure of circular obstacle is larger than that of square obstacle. The peak pressure of flame increases first and then decreases with the increase of blocking ratio. The peak flame pressure caused by the obstacles placed in the middle of the pipeline is larger than that at the two ends of the pipeline. The pressure propagation law of the precursor pressure wave is similar to that of the flame pressure as a whole. The flame pressure propagation law in right angle and three way pipeline is studied. In right angle pipe, flame pressure increases first and then decreases, and the flame pressure reaches the maximum after a distance of right angle bend pipe. Then the flame pressure began to decrease. In the three-way pipeline, the flame pressure also reached the maximum after a distance between the three way and the peak pressure of flame produced by two different ways of ignition at the end of the opening.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD712.7

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