单面遮挡下受限甲烷气云爆炸超压模型研究  

Explosion overpressure model of confined methane cloud obstructed with single wall

作　　者：吕东[1] 张欣[1] 吴伟[1] 李晋[1] 

机构地区：[1]公安部天津消防研究所,天津300381

出　　处：《振动与冲击》2014年第5期42-45,共4页Journal of Vibration and Shock

基　　金：国家科技支撑计划项目(2011BAK03B08);公安部消防局应用创新计划项目(2012XFCX15)

摘　　要：气体爆炸超压的经验公式往往不涉及遮挡对其带来的影响。以基于计算流体力学的方法,研究了单面遮挡对不同量级的受限甲烷气体爆炸超压带来的影响。研究结果表明,在设计的遮挡条件下,气体爆炸的超压与折合距离在对数坐标系中近似呈线性关系。通过数值模拟,提出了受限甲烷气体在受单面遮挡时的爆炸超压、甲烷燃烧热及距离爆炸的气云中心之间的距离三者之间的模拟计算式。该方面的研究对甲烷气体爆炸方面的工程计算以及其它遮挡条件下的爆炸模拟方法均有一定的参考意义。The existing empirical formulae regarding gas explosion overpressure often ignore the influence of obstructions and barriers.Overpressures of different levels of methane gas explosions occurring in a confined space were investigated in logarithmic coordinates based on computational fluid dynamics （CFD）method.The results indicated that the relation between the overpressure and the scaled distance is linear in logarithmic coordinate.The formulae for overpressure,combustion heat of methane gas and distance from the centre of combustible gas cloud were provided.The results were beneficial to explosion engineering computation and further scientific study on methane gas explosion.

关 键 词：甲烷 爆炸 超压 折合距离 

分 类 号：TE88[石油与天然气工程—油气储运工程]