温压炸药能量输出结构的初步研究

为了研究温压炸药后燃反应及其对空中爆炸冲击波的影响规律,采用实验和数值模拟相结合的方 法对温压炸药能量输出结构进行了初步研究。结果表明,距爆心较近时冲击波压力时程曲线上呈现两个峰 值,而在较远处则存在较宽的正压作用区,该炸药正压作用区冲量为相同质量TNT的约1.6~1.8倍。并根 据JWL-Miller模型参数得出后燃反应释放的能量占总能量的约1/3,以及非理想组分反应度随时间的变化 关系,在完全燃烧的理想情况下,后燃持续时间可达400ms。说明温压炸药中铝粉等高能添加剂的后燃反应 对增强冲击波效应和提高炸药做功能力有显著贡献。

A preliminary investigation on energy output structure of a thermobaric explosive

To explore the influence of the after-burning on the strength of the shock waves produced by the thermobaric explosive explosion in air,experiments and numerical simulations were performed to investigate the energy output structure.The results show that there lie two peaks on the pressure-time curves in the near field and a long positive pressure period in the far field.The impulse of the thermobaric explosive in the positive pressure period is 1.6~1.8 times as much as that of the TNT explosive with the same mass.The analysis of the JWL-Miller model parameters reveals that the energy released by the after-burning reaction occupies about one-thirds of the total energy.Furthermore,the reaction degree evolution curve was obtained for the nonideal component.In the case of complete burning,the after-burning reaction can last 400 ms.It indicates that the after-burning of high energy additives can evidently enhance the power of thermobaric explosive.