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准确计算马格努斯力和力矩对旋转弹箭设计、弹道计算和稳定性研究都至关重要。采用非定常雷诺平均Navier-Stokes(RANS)方程对高速旋转的SOCBT弹丸进行了数值模拟,纵向气动特性在整个攻角范围内都较好地与试验值保持一致,而侧向气动特性马格努斯力和力矩在小攻角范围与试验数据吻合较好,在大攻角范围却存在一定的差异。采用延迟分离涡模拟(DDES)方法的计算结果有较为明显的改善,对比研究表明分离点位置对马格努斯效应有着显著影响。表明DDES方法对于提高旋转弹箭马格努斯效应的数值模拟精度有较大的潜力。
Accurate Magnus force and moment calculations are crucial to the design of rotating projectiles, ballistic calculations and stability studies. The unsteady Reynolds averaged Navier-Stokes (RANS) equations were used to simulate the high-speed rotation of the SOCBT projectile. The longitudinal aerodynamic characteristics were consistent well with the experimental values over the entire range of angles of attack, while the lateral aerodynamic characteristics of the Magnum The force and moment agree well with the experimental data in the range of small angle of attack, but there are some discrepancies in the range of high angle of attack. The results of the DDES method are obviously improved. Comparative studies show that the position of the separation point has a significant effect on the Magnus effect. It shows that DDES method has great potential to improve numerical simulation accuracy of Magnus effect of rotating missile.