活性材料弹丸碰撞油箱引燃效应实验研究

Experimental Study on Ignition Effects of Fuel-Filled Tank Impacted by Reactive Material Projectile

采用弹道碰撞实验的方法,对高密度冷压成型和烧结硬化PTFE/Al/W活性材料弹丸碰撞油箱引燃效应进行了研究.实验结果表明,在弹丸质量和尺寸一定条件下,活性弹丸碰撞油箱引燃燃油能力显著强于钢弹丸;活性弹丸引燃效应除了与碰撞速度有关外,还显著受碰撞位置影响.基于实验结果,分析了不同装油量条件下碰撞位置和速度对油箱破裂和引燃行为的影响机理.分析表明,活性弹丸通过动能侵彻和爆炸化学能释放的联合作用,一方面显著增强了对油箱的结构破坏能力,提高了燃油的喷溅和雾化效应;另一方面活性材料爆燃反应形成的点火源持续时间更长、作用范围更大,从而有利于燃油的引燃,显著增强对燃油的引燃效应.

Ballistic impact experiments were conducted to investigate the ignition effects of a fuel- filled tank impacted by high-density pressed and sintered PTFE/Al/W reactive material projectiles. The experimental results show that, with the mass and size of projectiles fixed, when impacting a fuel-filled tank, the reactive projectile has a stronger capacity in igniting the tank than the steel projectile; the ignition behavior of reactive material projectiles by impacting a fuel- filled tank not only varies with impact velocity, but also is significantly influenced by impact position. Based on experimental results, the mechanisms of the influences of impact velocity and position on rupture and ignition of tanks with different amounts of fuel were analyzed. The results show that, reactive projectiles, through the combined effects of kinetic energy and chemical energy released during explosion, remarkably increase the damage to the fuel tank, improving the ejection and atomization of fuel. On the other hand, the duration and expansion region of the ignition source produced by deflagration reaction of reactive materials are greater. Thus reactive projectiles＇ capacity to ignite fuel is enhanced significantly.