不同点火能对甲烷爆炸的影响

Effects of Different Ignition Energy on Methane Explosion

摘要: 甲烷爆炸会带来巨大的财产损失、人员伤亡、环境破坏以及社会不良效应，影响甲烷爆炸的因素众多，其中点火能是影响甲烷爆炸及其破坏特性的一个重要因素。为探究点火能对甲烷爆炸传播性能的影响，利用Fluent模拟软件建立燃气管道模型，模拟在密闭空间内甲烷爆炸的传播过程，并进行模型可靠性验证。本次模拟了在5种不同点火能条件下的甲烷爆炸传播规律，测定了温度、超压峰值和速度等参数。研究结果表明：从弱点火能到强点火能，密闭管道内火焰传播速度加快，甲烷爆炸超压峰值增大，温度升高，超压峰值和温度均与点火能量大小呈对数函数关系。

Abstract: Methane explosion brings huge property losses, casualties, environmental damage and social ad-verse effects. There are many factors affecting methane explosions, among which ignition energy is an important factor affecting methane explosion and its destructive characteristics. In order to investigate the effect of ignition energy on the propagation performance of methane explosion, fluent simulation software is used to simulate the propagation process of methane explosion in a two-dimensional confined space and verify the results with previous experiments to obtain the peak overpressure, temperature and flame propagation rate of methane explosion under different ignition energy conditions. The results of the study show that from weak ignition energy to strong ignition energy, the flame propagation speed in the confined pipe increases, the peak overpressure of the methane explosion increases, the temperature increases, and both the peak overpressure and temperature are logarithmically related to the magnitude of the ignition energy.