两种密度DNTF装药的驱动性能及其产物状态方程

Driving Performance and JWL EOS of DNTF Charge with Two Densities

为研究装药密度对3,4-二硝基呋咱基氧化呋咱(DNTF)驱动性能的影响,采用不同的凝固工艺制备了两种密度的DNTF装药试样,并开展了Φ25mm圆筒试验,获得了圆筒壁膨胀位移与时间的关系,计算了爆轰产物在特定相对比容下的比动能及装药的格尼系数,并依据圆筒试验数据拟合了两种装药密度下DNTF爆炸产物的JWL状态方程。结果表明,常温常压凝固工艺条件下,DNTF装药密度仅为1.58g/cm^(3);在80℃、0.6MPa工艺条件下,装药密度升至1.80g/cm^(3),较常温常压下提高了13.9%;在装药密度为1.58g/cm^(3)下,DNTF的格尼系数为2.97mm/μs,爆轰产物相对比容为7.0时的比动能为1.471kJ/g;在装药密度为1.80g/cm^(3)下,DNTF的格尼系数增至3.03mm/μs,爆轰产物比动能增至1.716kJ/g,分别较常温常压下提高了2%和16.7%。表明DNTF装药密度的提升不仅能够显著提升单位体积装药的驱动性能,也有利于单位质量装药驱动性能的进一步增强。

In order to study the effect of charge density on the driving performance of 3,4-dinitrofurazanoxyfurazan(DNTF),DNTF charge samples with two densities were prepared by different solidification processes,andΦ25mm cylinder tests were carried out.The relationship between the expansion displacement of cylinder wall and time was obtained.The specific kinetic energy and the Gurney coefficient of the two kinds of DNTF charges at given detonation product relative volumes were calculated.According to the cylinder test data,the JWL equation of state of DNTF explosion products under two charge densities was fitted.The results show that the charge density of DNTF is only 1.58g/cm^(3) under ambient temperature and atmospheric solidification processes.However,it is increased to 1.80g/cm^(3) under the process conditions of 80℃and 0.6MPa,which is 13.9%higher than the former.In the former charge density,the Gurney coefficient of DNTF is 2.97mm/μs,and the specific kinetic energy of detonation product is 1.471kJ/g when the relative volumes of detonation product is 7.0.In the latter charge density,the Gurney coefficient of DNTF is increased to 3.03mm/μs and the specific kinetic energy of detonation product is increased to 1.716kJ/g,which are 2%and 16.7%higher than the former,respectively.These results indicate that the increase of DNTF charge density can not only significantly improve the driving performance of unit volume charge,but also further enhance the driving performance of unit mass charge.