旋转弹体马格努斯效应数值模拟方法研究

旋转的弹体通常会存在马格努斯效应,严重影响飞行稳定性和弹道轨迹。提出基于旋转壁面法的多对称面弹体旋转效应数值模拟方法,无需借助动网格和多参考系模型,仅需要将旋转速度附加壁面,即可使用定常方法模拟马格努斯效应;同时,使用SOCBT标准弹体模型对该方法进行验证分析。结果表明:计算值与试验值吻合较好;由于旋转引起的附面层堆积以及大攻角分离效应、激波的干扰,计算时附面层的网格节点要足够密,并且应该针对不同的攻角选择精度与效率兼顾的计算模型。

Numerical Investigation of Magnus Effect of a Spinning Projectile

The Magnus effect heavily affects the flight stability and trajectory calculation of the spinning projectile. A simple method based on rotating wall technique to calculate the effect of a rotating projectile with several planes of symmetry has been developed. Instead of using the dynamic mesh or multi-reference frame model, this method adds the rotating velocity to the surface of the projectile, and the Magnus force and moment can be obtained with steady calculations. The SOCBT configuration is used to testify the method. The calculation results are consistent with the experimental data in both static and rotating cases. Moreover, as the interference among the boundary layer, the separation flow at high angle of attack and the shock wave, enough gird nodes in boundary layer, as well as the calculating models, are needed to improve the precision of the Magnus effect simulation.