Influences of a Pipeline?s Bending Angle on the Propagation Law of Coal Dust Explosion Induced by Gas Explosion
Influences of a Pipeline?s Bending Angle on the Propagation Law of Coal Dust Explosion Induced by Gas Explosion
复制标题
管道弯曲角度对瓦斯爆炸煤尘爆炸传播规律的影响
DOI：
10.1080/00102202.2019.1673381
复制
发表时间：
2019-10-04
影响因子：
1.9
通讯作者：
Zhong, Zheng
中科院分区：
文献类型：
--
作者：
Zhang, Leilin;Yang, Qianyi;Zhong, Zheng
不同弯曲角度(45？, 60吗?, 90 ?, 120 ?，和135?)，以研究管道的影响？S弯曲角对瓦斯爆炸引起煤尘爆炸传播规律的影响。分析了弯曲后冲击波和火焰的变化规律。结果表明，瓦斯爆炸可诱发粉尘爆炸。爆炸后，冲击波的峰值超压急剧上升，过弯后又缓慢下降。峰值超压衰减率随管道长度的增加而增大。S弯曲角。转角后火焰传播速度先减小后显著增大。火焰传播速度变化率与管道弯曲角度呈正相关。火焰前面积呈反v型变化，转角后火焰前面积大大增大。火焰前缘面积的增长速度与管道弯曲角度呈正相关。
A pipeline explosion system with different bending angles (45?, 60?, 90?, 120?, and 135?) was constructed to investigate the influences of the pipeline?s bending angles on the propagation law of coal dust explosion induced by gas explosion. The change laws of the shock wave and flame after bending were analyzed. Results demonstrate that gas explosion can induce the explosion of deposited dust. After the explosion, the peak overpressure of the shock wave increases dramatically and then decreases slowly after the corner. The attenuation rate of the peak overpressure increases with the increase in the pipeline?s bending angle. The flame propagation speed decreases first and then increases significantly after the corner. The change rate of flame propagation speed is positively related to the bending angle of pipelines. The flame front area presents a reverse V-shaped variation that greatly increases after the corner. Furthermore, the growth rate of the flame front area is positively related to the bending angle of pipelines.