本文给出了底凹弹丸模型风洞实验结果的分析。从中可见,绕尾部带有导气孔的底凹弹丸具有令人满意的阻力特性,在NH-1风洞试验中,底部阻力的影响特別明显.最佳开孔比约为35％。若把此方法推广到第二代底凹弹丸中,将同样有效。 In this paper, the experimental results of the bottom cavity projectile model wind tunnel are given. It can be seen from the figure that the bottom concave pellets with air holes around the tail have satisfactory resistance characteristics, and the influence of bottom resistance is particularly obvious in the NH-1 wind tunnel test, and the optimum opening ratio is about 35%. If this method is extended to the second generation of bottom recess projectile, will be equally effective.