一体化弹丸脱壳数值仿真研究

Numerical Simulation on Sabot Discarding of Integration Launch Projectile

一体化弹丸的弹体、弹托的连接方式和结构参数直接影响着其脱壳进程,进而影响其飞行稳定性和效能。为研究一体化弹丸膛口初始弹道的行为状态,建立了一体化弹丸脱壳流场模型,基于流体力学控制方程和外弹道六自由度(6DOF)运动方程,在Fluent中利用光顺法和局部重构法的动网格技术,对一体化弹丸的弹托在空气动力作用相对于弹体分离的流场进行了数值模拟,得到了在整个过程中流场分布和相关的气动参数。该仿真结果为一体化弹丸的结构设计提供参考。

The linking mode and structural parameters of ILP body and sabots have direct impact on the discarding process of ILP, and then affect its flight stability and efficiency. In order to study the initial ILP behavioral state in terms of initial trajectory muzzle, a flow field model of ILP discarding was established in this paper. Based on the hydrodynamic governing equation and the 6 DOF motion equation of the external trajectory, the aerodynamic interaction of the integrated projectile carrier with respect to the separated flow field of the projectile body was numerically simulated in Fluent by means of the dynamic mesh technology of smoothing method and local reconstruction method. The flow field distribution and related aerodynamic parameters were obtained by simulation. The simulation results provide a reference for the structural design of ILP.