关键词: 云爆弹, 环氧丙烷, 储氢材料, 火焰速度, 云雾爆轰

Abstract: To study the effects of characteristic parameters of hydrogen storage material TiH2 on the detonation performance of epoxypropane (PO) cloud, PO-based mixed fuel samples with different particle sizes (5.40, 20.72, 38.88 and 60.51 μm) and different contents (0, 15 mass%, 30 mass%, 45 mass% and 60 mass%) of TiH2 powders were prepared. Using a 20 L spherical liquid fuel explosion test system and the colorimetric temperature measurement technology, the solid-liquid-gas three-phase deflagration characteristics of TiH2 powders/PO/air mixture were studied and compared with Ti powders/PO/air mixture. The experimental results showed that the flame propagation velocity, shock wave peak pressure and average flame temperature of TiH2 powders/PO/air mixture all increased when compared with Ti powders/PO/air mixture. With the increasing particle size of TiH2 powders, the shock wave peak pressure, maximum pressure rise rate and flame propagation velocity of TiH2 powders/PO/air mixture showed a trend of continuous decline, while the combustion duration continued to increase. With the increase of TiH2 powders content, the shock wave peak pressure, the maximum pressure rise rate and the flame propagation velocity of the TiH2 powders/PO/air mixture increased at first and then decreased, while the combustion duration showed an opposite trend. Hydrogen storage material TiH2 could significantly improve the damage performance of PO. However, the influence of its characteristic parameters on detonation parameters and combustion duration is opposite, so it is necessary to take overall consideration in the formulation design of cloud explosive weapons.

Key words: fuel air explosive, epoxypropane, hydrogen storage material, flame speed, cloud detonation