This article reports experimental investigation of deflagration flame quenching behavior by porous media. In this study, a semi-vented deflagration chamber with a porous media plate was constructed, taking account of effects of obstacles and porous media materials on the flame quenching process. A high speed video camera was used to image the process and behavior of flame propagation, meanwhile, the gas-phase temperatures and ion currents, upstream, within, and downstream of the porous media, were measured using micro-thermocouples and ion probes, respectively. Results show that methane/air deflagration flame can be quenched by the Al₂O₃ porous media with thickness of 20 mm and pore density of 10 ppi. However, the presence of obstacles along the flame path may lead to significant increase of flame speed, thereby both the decreases of gas-phase temperature and ion current when the flame passes through the porous medium in the case with continuous obstacles are less, eventually the unburnt gases downstream the porous media may be reignited. Compared to Al₂O₃, Al porous media shows superior flame quenching performance because this metallic material has higher thermal conductivity, which makes combusting flame release more heat to the pore walls and adjoining structures of the porous media.

本文报道了多孔介质爆燃火焰猝灭行为的实验研究。在这项研究中，考虑到障碍物和多孔介质材料对火焰淬火过程的影响，构建了带有多孔介质板的半通风爆燃室。使用高速摄像机对火焰传播的过程和行为进行成像，同时使用微热电偶和离子探针分别测量多孔介质上游，内部和下游的气相温度和离子流。 。结果表明，甲烷/空气爆燃火焰可以被Al ₂ O ₃淬灭多孔介质，厚度为20 mm，孔密度为10 ppi。但是，沿着火焰路径的障碍物的存在可能会导致火焰速度的显着提高，因此，在存在连续障碍物的情况下，当火焰穿过多孔介质时，气相温度和离子电流的降低都较小，最终多孔介质下游的未燃烧气体可能会重新点燃。与Al ₂ O ₃相比，Al多孔介质显示出优异的火焰熄灭性能，因为这种金属材料具有较高的导热性，这使燃烧火焰将更多的热量释放到多孔介质的孔壁和相邻结构。