摘要
在空间上瓦斯爆炸可以分为瓦斯燃烧区、非瓦斯燃烧区两个区域。在瓦斯燃烧区内冲击波和火焰是相互耦合的;当瓦斯燃烧完毕后燃烧波消失,只剩非瓦斯燃烧区冲击波,冲击波失去能量支持,最终恢复至正常大气参数。为了研究非燃烧区内瓦斯爆炸冲击波在分岔管道中的传播特性,搭建了截面为80 mm×80 mm的方形管道,分别由1 m、1.5 m、2.5 m、3 m、4 m等5种长度不等的管道组合而成。管道由3个部分组成,前端为直管道瓦斯填充区,中间管道为空气直管道和管道末端,末端设计了30°、45°、60°、90°四种单向分岔角度。通过瓦斯填充量和管道分岔角度两个变量,采用TST6300动态数据采集储存仪,对管道内瓦斯爆炸冲击波能量及冲击波在单向分岔情况下超压分流情况进行试验研究。结果表明,管道单向分岔条件下,非燃烧区瓦斯爆炸冲击波分流系数与冲击波初始超压及管道分岔角度有关,分流系数随冲击波初始超压及分岔角度的增加而增加。
The paper is engaged in an experimental study to pursue the propagating regularity of the gas explosion shock waves at the unidirectional bifurcation of the pipeline in the non-combustion zones. So far as we know,the gas explosion in the space can take place in the two kinds of areas： the gas combustion area and the non-gas combustion area. When the combustion waves disappear as the gas combustion is over,only the shock waves remain in the non-gas combustion area,and the shock wave may lose its energy support,and the air would finally come back to the normal atmospheric situation. However,when the shock wave and the flame are mutually coupled in the gas combustion area,a square pipe should be built up of a section of 80 mm × 80 mm composed of turnings with different lengths,such as 1 m,1. 5 m,2. 5 m,3m and 4 m,as is motivated by the recent interest in the study of the propagation features of the gas explosion waves in the branch pipelines of the non-combustion zones. The above said branch pipeline is by nature made up of three parts： the front part（ which serves as the straight pipe gas filling area）,the middle part（ a straight pipe for the air ventilation） and the third part（ the part of the pipe designed of four kinds of unidirectional bifurcation angles,such as 30°,45°,60° and 90°）. Our experiment is not only aimed to test the gas filling quantity and the unidirectional bifurcation angle,but also focused on the amount of the energy of the gas explosion wave in the tunnel and the overpressure shunt of the shock-wave of the TST 6 300 dynamic data storage machine under the unidirectional bifurcation situation.The results of our experiments show that under the unidirectional bifurcation situation,the shunt coefficient of the gas explosion wave in the non-combustion zone is related to the initial overpressure of the shock-wave and the tunnel bifurcation angle. With the increase of the initial overpressure and the bifurcation angle,the shunt coefficient of the shock wave would increase,too. The experimental results we have gained tend to show its great significance for the research of the propagation regularity of the gas explosion shock-wave as well as for the coal mining rescue and disaster-relief practice.
出处
《安全与环境学报》
CAS
CSCD
北大核心
2015年第5期108-111,共4页
Journal of Safety and Environment
基金
国家自然科学基金项目(51174080)
河南理工大学博士基金项目(B2009-20)
关键词
安全工程
瓦斯爆炸
非燃烧区
单向分岔管道
冲击波
safety engineering
methane explosion
non-combustion zone
unidirectional branch pipe
shock wave
