转塔气动光学效应的自适应校正分析  

Adaptive Correction Analysis of Aero-Optical Effects of a Turret

作　　者：陈勇[1] 袁强[1] 姚向红[1] 谢伟明[1] 李玉栋 Chen Yong;Yuan Qiang;Yao Xianghong;Xie Weiming;Li Yudong(Facility Design and Instrumentation Institute,China Aerodynamics Research and Development Center,Mianyang 621000,Sichuan,China)

机构地区：[1]中国空气动力研究与发展中心设备设计与测试技术研究所,四川绵阳621000

出　　处：《光学学报》2022年第24期27-35,共9页Acta Optica Sinica

摘　　要：转塔绕流会带来严重的气动光学效应影响,从而限制机载激光武器性能的有效发挥,故转塔气动光学效应的抑制研究具有现实的迫切性。采用高精度数值仿真方法,并结合风洞验证试验,以提供高置信度的时间序列波前数据。据此,建立校正残差在空域中随校正阶数的变化曲线与散点图,用于自适应光学校正的定量评估。研究结果表明:转塔流场中存在脱落涡街等复杂结构,当马赫数较高时还会出现激波;顶视气动光学效应最强,前视稳态像差含量高,顶视和后视动态像差占比大,激波结构会增加波前的动态像差占比;前视可以取得很好的自适应光学校正效果,而顶视校正难度较大,对自适应光学校正的变形镜拟合波面能力要求较高。因此,转塔气动光学效应的抑制建议采用自适应光学校正与流动控制结合等联合抑制方法。The flow around the turret causes serious aero-optical effects,consequently limiting the effective performance of airborne laser weapons.Therefore,researching the suppression of aero-optical effects of a turret has become a real urgency.In this paper,high-precision numerical simulation methods are used,and wind-tunnel verification experiments are conducted,to provide high-confidence time-series wavefront data.On this basis,the curve and scatter plot of correction residual variation with correction order in the airspace are developed for quantitative evaluation of adaptive optics correction.The results show that complex structures,such as shedding vortex streets,are observed in the flow field around the turret,and shock waves also appear when the Mach number is large.The aero-optical effect of the top view is the strongest,while the steady-state aberration of the front view accounts for a large share of the whole.Moreover,the dynamic aberrations of the top view and the rear view assume large proportions,and shock waves further increase the dynamic aberration ratios of the wavefront.The front view can achieve a satisfactory adaptive optics correction effect,while the correction of the top view is difficult as it requires a high wavefront fitting ability of the deformation mirror for adaptive optics correction.Therefore,joint suppression methods,such as combining adaptive optics correction and flow control,are recommended to suppress aero-optical effects of a turret.

关 键 词：大气光学 自适应光学校正 气动光学效应 光学转塔 校正阶数 波前重构 

分 类 号：O436[机械工程—光学工程] O355[理学—光学]