一体化弹丸主要由电枢、弹体和弹托组成，弹托在轨道炮内起着支撑并保护弹体的作用。一体化弹丸出膛后，弹体与弹托分离。为研究一体化弹丸出膛后弹体、弹托瞬态分离的行为状态，本文建立了一体化弹丸二维分离模型，基于Navier-Stokes控制方程和6DOF外弹道控制方程以及标准型$k - \varepsilon $湍流模型，采动网格技术（光顺法和局部重构法），对一体化弹丸出膛后弹体、弹托的动态分离过程进行数值仿真，得到不同时刻下分离状态的流场及相关的运动参数。分析弹托和弹体在分离过程中的弹道特性，为后续研究提供了设计依据。
The intergration launch projectile (ILP)is mainly consist of armature, projectilebody and sabot, the sabot plays the role of supporting and protecting the projectile body in a electromagnetic launcher. After the ILP has left of the chamber, the projectile body will be separated from the sabot. To study the behavior of the instantaneous separation between the projectile and the sabot after the ILP has left the chamber, we establish an ILP two-dimension separation model based on the Navier-Stokes govering equation, the 6DOF external ballistics govering equation and the standard turbulence model, and adopted the grid technology(fairing method and local redrawing method)for numerical simulation of the projectile body-sabot separation flow field after the ILP has left the chamber, so as to obtain the sabot and projectile body motion parameters during the separation process.And analyze the ballistic characteristic of body and sabot during separation period. It has provided reference for future optional structure design of intergration launch projectile.
2020,42(8): 32-37 收稿日期：2020-05-20
DOI：10.3404/j.issn.1672-7649.2020.08.006
分类号：TJ762
作者简介：古刚(1970-),男,研究员,主要从事电磁发射技术研究
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