摘要
通过两个球形容器与管道的连接组合,改变管道长度,进行连通容器预混气体爆炸实验.旨在获得连通容器的爆炸压力发展历史和连通管道内的火焰传播速率,进而分析管道长度、火焰传播方向、不同点火位置对连通容器爆炸压力和最大压力上升速率、火焰传播速率的影响.实验结果表明,随着连接管道长度的增加,传爆容器的爆炸压力和最大压力上升速率增加;当传爆容器为小容器时,增加更为明显,压力振荡更为剧烈;起爆容器的爆炸压力随管长的增加变化不大;火焰从起爆容器传播到传爆容器经历了一段不断加速、但加速度不断减小的过程;管径一定时,起爆容器越大,火焰进入管道的初速度越大,传爆容器越小,火焰传播受到的阻滞作用越强,火焰到达传爆容器的速度越小.
Premixed flammable gas explosion tests were carried out in two spherical containers connected by pipes with different lengths to determine the history of explosion pressure and the flame propagation velocity in pipes. Effect of pipe length, flame propagation direction, and ignition location on explosion pressure and flame propagation velocity in pipes was investigated. Experimental results show that the explosion pressure and the maximum rate of pressure in the second container are enhanced with the increase of pipe length. In the second container which is smaller, the pressure enhancement is more apparent with stronger pressure oscillation. The increase in pipe length has little effect on the explosion pressure in the first container. The flame velocity in pipes accelerates first and then slows down when approaching the second container. For the fixed pipe diameter, the initial flame velocity in pipes approaching to the first container increases with the container volume. As the volume of the second container decreases, the resistance to the flame propagation increases and the flame velocity in pipes near the container slows down, accordingly.
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2012年第3期256-259,共4页
Journal of Combustion Science and Technology
基金
国家自然科学基金资助项目(20976081
50904037)
江苏省高校自然科学基金资助项目(10KJB620001)
关键词
连通容器
管道长度
气体爆炸
火焰传播速率
爆炸强度
connected containers
pipe length
gas explosion
flame propagation rate
explosion intensity
