高落速云雾爆轰的数值模拟

Numerical Simulation of Cloud Detonation at high Falling Velocity

为了研究落速1000 m·s^(-1)条件下的燃料分散和爆轰过程,建立了燃料分散爆轰的计算仿真模型,以静态燃料分散及云雾爆轰实验结果作为数值方法进行了验证,分析了2 kg环氧丙烷燃料在高落速条件下分散爆轰的温度、压力随时间变化规律。结果发现:落速1000 m·s^(-1)条件下,数值模拟得到了云雾形态、浓度场随时间和空间的分布规律,云雾形态大致呈扇形,浓度随距离增加逐渐降低,最终达到稳定分布,云雾径向半径可达2.24 m,同时得到云雾爆轰过程及爆轰压力场、温度场的影响规律,起爆后形成弧形波阵面向外扩散且温度压力不断衰减。数值模拟结果与实验相吻合,为高落速云爆武器系统的安全设计提供了新途径。

To study the fuel dispersion and detonation process at a falling speed of 1000 m·s^(-1),a computational simulation mod-el of fuel dispersion detonation was established,and the static fuel dispersion and cloud detonation experimental results were used as numerical methods to verify the results.Results show that under the condition of a falling speed of 1000 m·s^(-1),the distri-bution of cloud shape and concentration field with time and space is obtained by numerical simulation.The cloud shape is roughly fan-shaped,and the concentration gradually decreases with distance,and finally reaches a stable distribution.The radial radius of the cloud can reach 2.24 m.The law of the cloud detonation process and the influence of the detonation pressure field and temperature field are obtained.After initiation,the arc-shaped wave front is formed and diffuses outward,and the tempera-ture and pressure continue to decay.The numerical simulation results are consistent with the experiments,which provide a new way for the safety design of the high-falling velocity cloud explosion weapon system.