Experiments and Modelling of Explosive Mixture Formation in a Closed Space as a Result of Flammable Gas Leak

Aleš Tulach, M. Mynarz, M. Kozubková
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引用次数: 4

Abstract

This paper is focused on problem of gas behaviour at a gas leak from the low-pressure pipe system. During a gas leak, leaking flammable gas is mixed with the ambient air and hazardous explosive mixture is formed. Formation of local critical concentrations of methane-air mixture in a closed dissected space depends on duration of a gas leak. Velocity of propagation of leaked gas, local explosive concentrations of gas-air mixture and also duration of formations of these local concentrations could be determined using successful verification of CFD simulation with experiments. The detailed numerical analysis enables to determine volume concentration methane-air mixture in any point of the investigated area. This work could contribute to more accurate analysis of gas leaks in residential and technological objects with occurrence of flammable, toxic or other dangerous gases.
可燃气体泄漏导致密闭空间内爆炸性混合物形成的实验与模拟
本文研究了低压管道系统气体泄漏时的气体行为问题。气体泄漏是指泄漏的可燃气体与周围空气混合,形成危险的爆炸性混合物。甲烷-空气混合物的局部临界浓度在封闭解剖空间的形成取决于气体泄漏的持续时间。通过CFD模拟与实验的成功验证,可以确定泄漏气体的传播速度、气体-空气混合物的局部爆炸性浓度以及这些局部爆炸性浓度形成的持续时间。详细的数值分析能够确定在研究区域的任何一点甲烷-空气混合物的体积浓度。这项工作有助于更准确地分析发生易燃、有毒或其他危险气体的住宅和技术对象的气体泄漏。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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