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燃料在炸药爆炸驱动下形成燃料空气爆炸云团,进而引燃爆炸,对目标造成毁伤.本文在前期提出的光滑离散颗粒流体动力学方法 (SDPH)的基础上,引入描述炸药由爆轰到膨胀整个过程的Jones-Wilkins-Lee状态方程及描述气体快速燃烧过程的EBU-Arrhenius燃烧模型,建立了求解战斗部起爆、燃料抛撒和燃料二次引燃爆炸问题的新型SDPH方法.设计了圆环形燃料颗粒在炸药爆炸驱动下运动抛撒的算例进行数值验证,结果与理论相符;对燃料空气炸药(FAE)云雾的形成和发展过程进行了数值模拟,分析了云雾的形态,并与实验结果进行对比,符合较好,同时分析了不同起爆方式对云雾团成型的影响;最后,在云雾团成型的基础上,引入蒸发燃烧模型对FAE的燃烧爆炸过程进行了模拟研究.结果表明,本文建立的数学模型和计算方法可以较好的模拟燃料空气炸药抛撒成雾及云雾燃烧爆炸过程,为该类武器装备的设计研究提供了较好的数值方法.
The fuel, which is driven by explosives, forms an explosive cloud of fuel air, which ignites the explosion and damages the target.In this paper, based on the smooth discrete particle hydrodynamics (SDPH) The Jones-Wilkins-Lee equation of state and the EBU-Arrhenius combustion model describing the rapid combustion process of the gas are established for the whole process, and a new SDPH method is developed to solve the problems of initiation, fuel dissipation and secondary ignition of the combustor. Numerical simulation of fuel particles driven by explosives explodes the results of numerical simulation. The formation and development of FAE clouds are numerically simulated, and the morphology of the cloud is analyzed. The results are consistent with the experimental results The comparison and the coincidence are good, meanwhile, the influence of different initiation methods on the cloud formation is analyzed.Finally, based on the formation of the cloud formation, the evaporation combustion model is introduced to simulate the combustion and explosion process of FAE.The results show that Mathematical model and calculation method can better simulate the fuel air explosives throwing fog and cloud combustion and explosion process, The research on the design of weapons-like equipment provided a good numerical method.