On the 3D unstructured tetrahedron grids generated by Gambit 2.0, the high-precision FVM with TVD schemes is applied to simulate the APFSDS sabots separating and discarding flow field, and results that accord with the laboratorial photos are obtained.

• 利用Gambit 2.；0生成三维四面体非结构网格，建立三维高精度有限体积TVD格式，通过计算平头正圆柱超音速绕流流场，验证这种三维格式的高分辨率性。 并将之应用在尾翼稳定脱壳穿甲弹弹托分离流场的数值模拟中，得到了与实验照片比较吻合的计算结果。