不同长径比的狭长管道油气爆炸实验

Experiment on oil and gas explosion of slender pipelines with different length-to-diameter ratios

为了研究油料储运工程中较大长径比狭长受限空间内油气爆炸超压和火焰传播规律,搭建了不同长径比狭长管道油气爆炸实验系统。采集爆炸超压值、火焰传播速度、火焰强度等参数数值并进行整理分析,结果表明:长距离管道对爆炸超压和火焰传播有显著强化作用,长径比超过一定数值时可发展为爆轰;开口管道发生爆轰的时间早于闭口管道;火焰传播速度由管道中部开始急剧加快,且开口管道增大速率大于闭口管道;火焰强度在闭口管道中由管道中部到后部呈上升趋势,而在开口管道中呈下降趋势。实验数据可为油料储运安全及防护设计提供参考。

To study the law of oil & gas explosion overpressure and flame propagation of slender pipelines with large lengthto-diameter ratios in confined space in oil storage and transportation engineering,an oil and gas explosion experimental system for slender pipelines with different length-to-diameter ratios was set up.By acquiring and analyzing the explosion overpressure value,flame propagation speed,flame intensity and other parameters,the results show that the long-distance pipeline exerts significant reinforcement on explosion overpressure and flame propagation,which may induce the detonation when the length-to-diameter ratio exceeds a certain value.The detonation time of open pipeline comes earlier than that of closed pipeline.The flame propagation speed increases sharply from the middle of the pipeline,and the increase rate in open pipeline is larger than that of closed pipeline.The flame intensity goes up,from the middle to the end,in the closed pipeline,but goes down in the open pipeline.The experimental data could provide references for the safety of oil storage and transportation and protective design.