Preventing the propagation of flames in a pipeline is an effective measure for avoiding gas explosion accidents and reducing losses. To evaluate the effect of wire mesh, acting as a porous media, experimental and simulation studies are conducted to determine the influence of the wire mesh on the dynamics of premixed methane/air flame propagation in a semi-closed pipe. Four different kinds of wire mesh with different numbers of layers are chosen in the experiments and simulation, and the mechanism of wire mesh quenching of the flame is investigated. The experimental and simulation results are consistent. Flames are quenched when 4 layers of 40-mesh or 3 layers of 60-mesh wire mesh are used; however, once the flame propagates through the wire mesh, the risk of methane combustion may increase. The wire mesh becomes the key factor causing flame folds and acceleration, and the greater the number of layers or the larger the mesh size is, the more obvious the folds after the flame passes through the wire mesh. Moreover, the combination of heat absorption and disruption of the continuous flame surface by the mesh causes flame quenching. Wire mesh can effectively attenuate the flame temperature during premixed flame propagation in a pipe, and the attenuated maximum rate reaches approximately 79% in the case of adding 3 layers of 60-mesh wire mesh.

防止火焰在管道中蔓延是避免气体爆炸事故和减少损失的有效措施。为了评估用作多孔介质的丝网的效果，进行了实验和模拟研究，以确定丝网对半封闭管道中预混合甲烷/空气火焰传播动力学的影响。在实验和仿真中选择了四种不同层数的金属丝网，并研究了火焰对金属丝网的淬火机理。实验和仿真结果是一致的。当使用4层40目或3层60目金属丝网时，熄灭火焰。但是，一旦火焰传播通过丝网，甲烷燃烧的风险可能会增加。金属丝网成为导致火焰折叠和加速的关键因素，层数越多或网眼尺寸越大，火焰穿过金属丝网后的褶皱越明显。而且，热吸收和网对连续火焰表面的破坏的结合导致火焰淬灭。丝网可以有效地衰减管道中预混合火焰传播期间的火焰温度，并且在添加3层60丝网的情况下，最大衰减率达到约79％。