中国安全科学学报 ›› 2021, Vol. 31 ›› Issue (3): 54-59.doi: 10.16265/j.cnki.issn1003-3033.2021.03.008

• 安全工程技术 • 上一篇    下一篇

球形障碍物对瓦斯爆燃火焰影响试验研究

王磊 助理研究员   

  1. 中煤科工集团重庆研究院有限公司,重庆 400039
  • 收稿日期:2020-12-15 修回日期:2021-02-07 出版日期:2021-03-28 发布日期:2021-12-20
  • 作者简介:王 磊 (1983—),男,山东烟台人,博士研究生,助理研究员,主要研究方向为气体粉尘爆炸及防治技术。E-mail:Clear8023@163.com。
  • 基金资助:
    国家重点研发计划资助项目(2018YFC0807900)。

Experimental study on effect of spherical obstacle on gas deflagration flame

WANG Lei   

  1. Chongqing Research Institute Co. Ltd., China Coal Technology and Engineering Group, Chongqing 400039, China
  • Received:2020-12-15 Revised:2021-02-07 Online:2021-03-28 Published:2021-12-20

摘要: 为进一步开发煤矿井下瓦斯爆炸事故的隔抑爆技术装备,利用截面为0.2 m×0.2 m的方形管道、纹影仪和高速摄像机,开展无障碍物时和球形障碍物存在情况下的瓦斯爆燃传播试验。研究发现,无障碍物时,密闭管道内爆燃火焰的结构和传播速度受反射压力波的影响很大,湍流火焰、化学反应作用能力与反射压力波的相互作用是造成火焰传播速度变化的主要原因;球形障碍物存在时,火焰受扰动后被拉伸为前锋、中锋和尾锋,前锋速度最快,尾锋最慢;火焰前锋从经过障碍物开始整体呈加速趋势,与无障碍物相比,通过观察段的时间明显缩短。

关键词: 球形障碍物, 瓦斯爆燃, 密闭管道, 火焰传播, 反射压力波

Abstract: In order to further develop explosion-proof technology and equipment for underground gas explosion accidents in coal mines, gas deflagration propagation experiment was carried out when there were no obstacles and when there were spherical obstacles by using a square pipe with a cross section of 0.2 m×0.2 m, schlieren device and high-speed camera. Study shows that when there are no obstacles, structure and propagation speed of deflagration flame in a sealed pipeline are greatly affected by reflected pressure wave. Mutual game between turbulent flame, chemical reaction ability, and reflected pressure wave is main reason for change of flame propagation speed. When a spherical obstacle exists, flame is disturbed and stretched into a front, a center and a tail, and front is the fastest, tail is the slowest. Flame front has an overall acceleration trend from passing obstacle. Compared with obstacle, time to pass observation period is significantly shorter.

Key words: spherical obstacles, gas deflagration, airtight pipeline, flame propagation, reflected pressure wave

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