光学舱外形对子弹转速的影响数值研究

The Influence of Optical Cabin Geometry on the Rotate Speed of A Projectile by Numerical Research

为了预估光学舱几何外形的变化对旋转子弹转速的影响,文中采用求解准定常流场的方法对其进行数值模拟。结果显示:光学舱迎风端几何不对称会造成子弹转速增加或者减小,甚至反向旋转;提出在光学舱设计时应减小迎风端凸台的高度,防止转速增大。结论表明数值研究的结果和实验结果一致性较好;光学舱的几何形状对子弹的转速和旋转方向影响较大;光学舱左凸台会引起较大的顺时针转速;无凸台光学舱会减小转速;宽凸台光学舱也会产生较小的转速。

To predict the influence of optical cabin geometry on the rotate speed of a projectile,quasi-stable flow simulations were used in the paper.The results show that the geometry asymmetry at the end of windward optical cabin increases or decreases the rotate speed,and may even trigger reverse spin;when conducting the design of optical cabin geometry,the height of optical cabin boss should be decreased to prevent the increase of rotate speed.The conclusion in the paper indicates that the calculation data are in good agreement with the experimental data;the optical cabin geometry has great effect on the rotate speed and direction;the left boss of optical cabin can induce higher clockwise rotate speed;no boss of optical cabin can decrease the rotate speed;the wide boss of optical cabin can also produce lower rotate speed.