采用改进的延迟脱体涡模拟（IDDES）方法计算了跨声速来流下激光转塔绕流流场，并采用几何光线追迹方法计算了不同光束发射角下的气动光学效应，分析了不同流场特征结构对气动光学效应的影响。结果表明，转塔表面压力分布呈现对称的“呼吸”模态和反对称的“交替”模态这两种主特征，其特征频率范围分别为St=0.26～0.41和St=0.11～0.22，这两种主特征在频域中呈现出连贯性。转塔所受阻力主要由剪切层振荡决定，所受侧向力主要由激波抖动导致，而转塔轴向力则是由激波抖动和剪切层振荡共同作用。光束穿过附着流区域的高阶光程差较小且波动幅值也很小；光束穿过激波区域和湍流尾迹区时，高阶光程差很大，其时均光程差约为附着流区域光程差的4倍，而其峰值光程差则是附着流光程差的13倍。光束穿过剪切层和湍流尾迹涡的高阶光程差经过本征正交分解（POD）后各阶模态能量占比较为相同，而光束穿过激波后的光程差能量更为集中在前五阶模态。

Improved delayed detached eddy simulation (IDDES) is used to calculate the flow field around the turret in transon-ic flow. The ray tracing method is employed to calculate the aero-optical effect at different beam emission angles. The aero-optical effect affected by different flow structures is analyzed. The results indicate that the pressure distri-bution on the turret exhibits two main characteristics: a symmetric “breathing mode” and an antisymmetric “shifting mode.” Their peak frequency are at St=0.26~0.41 and St=0.11~0.22, respectively, and these two main features ex-hibit coherence in the frequency. The drag force of the turret is primarily determined by shear layer oscillation, the lateral force is largely due to the shock wave jitter, and the axial force is influenced by both shock wave jitter and shear layer oscillation. The high-order optical path difference (OPD) is relatively small with little fluctuation when the beam passes through the attached flow region. However, when the beam traverses the shock wave region and the turbulent wake zone, the high-order OPD is significantly large, with the time-averaged OPD being about four times that of the attached flow region. and the peak OPD being 13 times greater than that of the attached flow. The high-order OPD of the beam passing through the shear layer and turbulent wake vortices shows similar energy ratio using proper orthogonal decomposition (POD) analysis. In contrast, the OPD energy of beams passing through the shock wave is more concentrated in the first five modes.