稀土金属材料填充方式对预混气体爆炸特性抑制研究

利用20 L球形爆炸装置，探究了在多孔稀土金属材料两种不同的填充方式（球状和片状）下甲烷-空气预混气体爆炸特性的变化规律，考虑了留空率和填充密度对预混气体爆炸特性的影响，并利用压力传感器记录球体内爆炸压力曲线。研究结果表明:甲烷爆炸压力、最大压力上升速率和爆炸指数均与留空率呈正比例关系，与填充密度呈反比例关系，片状材料下最大压力下降幅度大于球状材料下的；片状材料抑爆性能优于球状材料的，片状材料的双重抑爆作用对爆炸威力的影响更甚；2种不同填充方式下阻火抑爆的主要机理存在差异。

Inhibition of explosion characteristic of premixed gases by filling patterns of rare earth metal materials

Using a 20 L spherical explosive device filled with porous rare earth metal materials, we investigated the explosion characteristics variation of the premixed methane-air mixture in two different filling patterns: spherical and flaky. The influences of blank rate and packed density on the explosion characteristics were considered. And the pressure sensor was used to record the explosion pressure inside the spherical device. It shows that the methane explosion pressure, the maximum pressure rise rate, and the explosion index are all proportional to the blank rate and inversely proportional to the packed density. The drop rate of the maximum explosion pressure of the flaky materials is greater than that of the spherical materials. The explosion suppression performance of the flaky materials is better than that of the spherical materials, and the dual function of the flaky materials has a stronger influence on the explosion power. The main mechanisms of fire and explosion suppression in the two different filling patterns are different.