多孔材料对氢气爆轰的抑制作用

Inhibition effect of porous materials on hydrogen detonation

为了研究多孔材料对氢气爆轰的抑制作用,在内径80 mm、长6000 mm的爆轰圆管中开展2H_(2)+O_(2)+3Ar预混气爆轰传播实验。在距点火头5000 mm处放置不同孔隙密度(10、20、40 ppi)厚度30 mm的Al_(2)O_(3)泡沫陶瓷和不同厚度(10、30、50 mm)孔隙密度20 ppi的泡沫铁镍金属,分别使用压力传感器、烟膜记录爆轰波压力、胞格结构,计算爆轰波传播速度。结果表明,速度亏损和胞格尺寸随着孔隙密度或厚度的增加而增大,但是均与初始压力成反比。两种多孔材料的材料特性不同,泡沫铁镍金属具有良好的导热性,因此对爆轰波的抑制效果强于Al_(2)O_(3)泡沫陶瓷。

In order to study the inhibition effect of porous materials on the detonation propagation of 2H_(2)+O_(2)+3Ar premixed gas,series of experiments were carried out in the detonation tube.The inner diameter of tube is 80 mm and the length is 6000 mm.30 mm thick Al_(2)O_(3)ceramics foam with different porosity(10,20,40 ppi),foam iron nickel metal with different thickness(10,30,50 mm)and porosity of 20 ppi were placed at a distance of 5000 mm from the ignition head.The pressure sensor and smoke film are used to record the detonation wave pressure and cell structure respectively,and the detonation wave propagation velocity is calculated.The results show that the velocity deficit and cell size increase with the increase of pore density or thickness.But both are inversely proportional to the initial pressure.The material properties of the two porous materials are different.The foam iron nickel metal has good thermal conductivity.So its inhibition effect on detonation wave is stronger than that of Al_(2)O_(3)ceramic foam.