For complicated unsteady separated flow problem of slender body at extra-wide of angle of attack range, delayed detached eddy simulation based on shear stress transport turbulence model is adopted to simulate the unsteady flows of slender body numerically in Mach number 0.6 and at the angle of attack of 0° to 180°. The calculated results of unsteady aerodynamic forces and the fluctuating pressure are analyzed which have a good agreement with experimental results. The unsteady amplitude of the lateral force is particularly strong at the angle of attack of 45 to 165°. The Strouhal number of lateral force range from 0.177 to 0.31. The investigation of unsteady vortical flow characteristics indicate the dominant frequency characteristic of aerodynamic force is mainly generated by Karman-vortex-street-like flow induced by the cylindrical body and no obvious dominant frequency is found in the massively separation past the canard surface.

针对细长体在攻角超宽范围内的复杂非定常分离流动问题，采用基于剪切应力传递湍流模型的延迟分离涡模拟，以数值模拟马赫数为0.6，角度为0.6的细长体的非定常流动。 0°至180°的冲击。分析了非定常空气动力和脉动压力的计算结果，与实验结果吻合良好。在攻角为45至165°时，横向力的不稳定幅度特别大。侧向力的斯特劳哈尔数范围为0.177至0.31。