In order to explore methods for suppressing methane combustion and improve the safety of its engineering application. The effect of single-layer wire mesh on premixed methane-air flame behaviors and pressure dynamics in a closed pipe is experimentally investigated. Premixed methane-air mixture with stoichiometric ratio is used in our experiments. The wire mesh of seven different types are chosen. High-speed schlieren photography system and pressure transducers are adopted to record flame behaviors and pressure-time history, respectively. It is found that the flame can easily pass through the wire mesh of 12 and 20 mesh, but extinguishes under the effect of 30 mesh. For 40, 60, 80, and 100 mesh conditions, the flame presents salient quenching trend but finally passes through wire mesh. Meanwhile, the wire mesh has been seriously destroyed. The results indicate that anti-destructive is quite important for the fire resistance capacity of wire mesh. Moreover, the wire mesh significantly advances tulip flame formation time and makes flame front inversion extent weaker due to its effect on advancing and weakening the interactions between flame front and pressure waves. Furthermore, almost no suppression effect on flame tip speed is observed in the upstream pipe because the reduction of gas flow velocity is counteracted by the growth of gas combustion velocity. However, the flame propagation in the middle suppression section is significantly inhibited due to the great heat losses when touching wire mesh. Besides, the maximum pressure is decayed significantly. And the suppression effect is pretty enhanced as mesh of wire mesh increases.

为了探索抑制甲烷燃烧的方法并提高其工程应用的安全性。实验研究了单层金属丝网对密闭管道中预混合甲烷-空气火焰行为和压力动态的影响。实验中使用具有化学计量比的预混合甲烷-空气混合物。选择了七种不同类型的丝网。采用高速schlieren摄影系统和压力传感器分别记录火焰行为和压力时间历史。发现火焰可以容易地通过12和20目金属丝网，但是在30目的作用下熄灭。对于40、60、80和100目条件，火焰呈现出明显的淬灭趋势，但最终会通过丝网。同时，丝网已经被严重破坏。结果表明，抗破坏性对丝网的耐火性能具有重要意义。而且，由于其对推进和减弱火焰前锋与压力波之间的相互作用的作用，金属丝网大大地延长了郁金香的火焰形成时间，并使火焰前锋反转程度变弱。此外，在上游管中几乎没有观察到对火焰尖端速度的抑制作用，因为气体燃烧速度的增长抵消了气体流速的降低。但是，由于接触丝网时的热损失大，因此抑制了中间抑制部的火焰传播。此外，最大压力显着下降。随着金属丝网的增加，抑制效果得到了很大的增强。