DNTF基同轴双元装药的爆轰波形及驱动性能

Detonation Wave-shape and Driving Performance of Coaxial Binary Charge of DNTF-based Aluminized Explosives

采用两种不同含铝量的3,4-二硝基呋咱基氧化呋咱(DNTF)基炸药制备了一种同轴双元组合装药,其内层装药的含铝量为20%,外层装药的含铝量为5%,通过高速扫描法研究了该组合装药的爆轰波形特征;采用含铝量为12.5%的DNTF基炸药制备了同尺寸的单一装药,并通过圆筒实验,对比了组合装药与单一装药驱动性能的差异。结果表明,外层装药爆速较高时,内层装药的爆轰波形将产生汇聚效应,同时也加剧了外层装药的侧向干扰,使其波形呈现明显的散心特征;该组合装药的复杂波形不仅影响内外层装药的爆轰反应区宽度,还使圆筒比动能及爆轰产物压力在初期均明显低于单一装药;随着爆轰产物的膨胀,组合装药与单一装药的圆筒比动能逐渐接近,且爆轰产物相对比容增至2.69后,组合装药爆轰产物的压力便明显超过单一装药。

A coaxial binary composite charge was prepared by 3,4-dinitrofurazanfuroxan（ DNTF） based explosives with two kinds of different aluminum content. The charge was composed of aluminum contents of 5% for inner layer and 20% for outer layer,and the detonation wave-shape characteristics of the composite charge were studied by high speed scanning method. A single charge with same size was prepared by DNTF based explosive with aluminum content of 12.5%. The difference of driving performances of the composite charge and single charge with aluminum contents of 12.5% were compared by cylinder test. Results show that the detonation wave-shape of the inner layer charge will produce a convergence effect when the detonation velocity of outer layer charge is higher,meanwhile,the side interference of the outer layer charge is enhanced,making the wave-shape reveal diverging characteristics obviously. The complex wave-shape of the composite charge not only affects the detonation reaction zone width of the inner and outer layer charge,but also makes the specific kinetic energy and pressure of detonation products in the early stage lower than that of the single charge significantly. With the expansion of detonation products,the specific kinetic energy of the composite charge and single charge is gradually clouse and after the relative specific volume of detonation products is up to 2.69,the pressure of detonation products of the composite charge will be significantly larger than that of single charge.