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针对鸭式布局下的微小型制导弹药,研究了翼展与弹径比值变化下的静稳定性。首先导入制导弹药的几何节点,实现了三维气动外形建模,然后根据不同的飞行条件,进行气动流体力学仿真,最后得到了弹药静稳定性随翼展与弹径比值变化的曲线。其中,选定三种典型方案,获得了随攻角变化的升力系数、阻力系数以及俯仰力矩系数,对比分析了弹药气动特性。结果表明,弹药静稳定性随翼展与弹径比值的增大而降低,在满足设计要求范围内,弹体具有良好的机动性。
Aiming at the miniature guided munitions under the duck-type layout, the static stability under the variation of the ratio of the span and the radius of the shell is studied. Firstly, the geometric node of guided munition is imported to realize the modeling of three-dimensional aerodynamic profile. Then the aerodynamic simulation of aerodynamics is carried out according to different flight conditions. Finally, the curve of the static stability of the ammunition with the ratio of span and span is obtained. Among them, three typical schemes were selected to obtain the lift coefficient, drag coefficient and pitch moment coefficient with the change of attack angle, and the aerodynamic characteristics of the ammunition were compared and analyzed. The results show that the static stability of the ammunition decreases with the increase of the ratio of span and span, and the projectile has good maneuverability within the range of design requirements.