对超音速弹体底部流动特征分三种状态进行了数值模拟。一种是底部不排气状态,一种是底部亚音速排气状态,另一种是底部超音速排气状态。经解这三种状态和外部超音速绕流混合流动的流场控制方程组,得出的数值模拟结果表明,数值精度合理,能有效地分析底部诸状态下流场流动特征,为提高射程和精度提供判断依据,为此类底部流动特征提供了一种预测方法。 The flow characteristics at the bottom of supersonic projectile were numerically simulated in three states. One is the bottom of the non-exhaust state, one is the bottom subsonic exhaust state, the other is the bottom of the supersonic exhaust state. The numerical simulation results show that the numerical accuracy is reasonable and can effectively analyze the characteristics of the flow field at the bottom of various states. In order to improve the range and Accuracy provides a basis for judgment, providing a predictive method for such bottom flow characteristics.