燃料爆炸抛撒过程的实验研究

Experimental Study on the Process of Fuel Explosive Dispersion

通过高速录像对3种量级(5、20、50kg)FAE装置的静爆实验进行了现场记录,通过对燃料爆炸抛撒形成云雾的成长过程的实时记录结果,把燃料的爆炸抛撒过程分为3个阶段:喷出阶段、过渡阶段和膨胀阶段,其依据是爆炸驱动力和气动阻力的相互作用而导致的云雾径向膨胀速度的变化;对于结构相似的FAE装置,爆炸抛撒各阶段结束时刻及最终的云雾直径与装填燃料量的立方根成正比,说明小型装置可以模拟大型FAE武器;此外对应于不同阶段结束时刻的云雾直径与装置直径的比值分别为5.5、30和45。

Local records of static explosion were taken by the high-speed video for the 3 kinds of FAE devices. On the analysis of experimental data, the process of fuel explosive dispersion was divided into three regimes: Ejection stage, transition stage and expansion stage, based on the radical expanded velocity caused by explosion acting force and aerodynamic force. For FAE devices with similar structure, according to the experiment data obtained from high-speed video, we got that end-time of different stages and cloud diameters before detonation were proportional to the cube root of fuel quantity, which illuminated that small device can simulate big FAE device. The ratios of cloud diameter to device diameter were 5.5, 30 and 45 at the end moment of different stages, respectively.