发射器转塔是机载激光武器系统的重要组成部分。载机跨声速飞行条件下，转塔的外凸特征极易引起激波/边界层干扰，伴随复杂的多尺度旋涡生成和演化过程，产生强烈的湍流脉动，气动光学效应影响显著，对激光武器打击范围和工作效能构成了严重制约。项目以气动光学机理研究需求为牵引，针对典型转塔跨声速湍流分离流场，在考虑发射窗曲率和来流特征变化对剪切层失稳及旋涡运动影响的前提下，开展流场精细结构分析、涡系结构演化机理及流动控制措施研究。完善适合分离涡结构捕捉的高精度RANS/LES混合方法，揭示激波非定常振荡-剪切层失稳-旋涡输运现象的演化机制，厘清不同尺度旋涡运动特征及流场瞬时脉动对光学畸变特性的影响规律。在此基础上分析附加旋涡系统相互干扰对流场结构的作用机制，探索能够有效抑制光学畸变的流动控制方法。深刻认识分离流场涡系结构演化影响光学特性的流动机理，为气动光学机理研究提供可靠的流体力学理论依据与方法支撑。

The optical turret is an important component of the airborne laser weapon system. Under the condition of transonic flight, the convex geometrical characteristics of the optical turret can easily cause the shock / boundary layer interference with complex generation and evolution process of multi-scale vortex, generate intense turbulent pulsation and lead to significant aero-optical effect. As a result, the strike range and efficiency of the laser weapon system are constrained seriously. The project is based on the demand for aero-optical mechanism research and aimed at transonic turbulence separation flowfield of typical optical turret. Considering the influence of the launch window curvature and the incoming flow characteristic to the instability of the shear layer and the motion of vortex, subtle flowfield structure, evolution mechanism of vortex system and flow control measures will be investigated. The project will develop the hybrid RANS / LES method for detailed analysis of detached vortex, reveal the mechanism of shock unsteady oscillation, shear layer instability and vortex transport phenomena, clarify the interference effect of the vortex structure movement and transient pulsation to optical properties. Based on the detailed analysis, the mechanism of the additional vortex system interference to the flowfield structure will be analyzed and the flow control method that can reduce the aero-optics distortion effectively will be explored. Through the project, the understanding of the flow mechanism in aero-optics phenomena about the evolution process of vortex structures of complex flowfield will be increased. Reliable theoretical basis of fluid dynamics and flowfield analysis methods will be provided to aero-optics mechanism research.