铝粉含量和粒度对HMX基炸药空爆性能的影响

为了分析不同铝粉含量及颗粒尺寸对炸药空中爆炸性能的影响,笔者利用含铝炸药的自由场空爆试验,测试了不同配方的含铝炸药空爆超压、正压作用时间和空爆冲量,对试验结果进行了比较分析。对于HMX基含铝炸药,铝粉的质量分数为30%~35%时,超压和冲量较高;当铝粉的质量分数超过35%时,超压和冲量趋于降低。自由场传感器测定结果显示,超压和冲量在4.5 m的较远距离处、铝粉的质量分数约30%时有最大值。当铝粉的质量分数约为30%时,含纳米铝粉炸药的超压和冲量低于含微米铝粉炸药。

Effect of Content and Particle Size of Aluminum Powder on the Air Blast Property of HMX-based Explosive

In order to research the effect of contents and particle sizes of Al powder on the air blast property of explosive, over-pressure, pressing time and impulse of aluminized explosives with different formula were tested and com-pared in this article.The result shows that explosive containing Al at the range of 30%-35%( mass fraction) has higher over-pressure and impulse than other explosive.With the increase of Al content (mass fraction is higher than 35%), over-pressure and impulse decrease.Free-field sensor shows that explosive containing 30%Al (mass fraction) gives rise to the highest over-pressure and impulse values in 4.5 m distance.Moreover explosive containing 30% nano-Al (mass fraction) has lower over-pressure and impulse than explosive containing micro-Al.