摘要
针对不同流速比混合层流场气动光学效应问题,首先采用大涡模拟数值方法进行了数值仿真,其次用光线追迹方法进行了气动光学效应仿真,最后对混合层的气动光学效应进行了评价。结果表明,混合层流场涡结构与光程差极小值存在一一对应关系,并且其流速比低的混合层气动光学效应更加严重。同时,研究了不同光学参数对斯特列尔比的影响,得到了相应的规律。
This paper aims at the problem of aero-optical effects in the mixing layer flow field with different velocity ratios.Firstly the large eddy simulation method is used for numerical simulation.Secondly the ray tracing method is used to simulate the aero-optical effects.Finally an aero-optical evaluation of the mixing layer is carried out.The results show that there is a remarkable correspondence between the vortex structure of the mixing layer flow field and the minimum optical path difference.The aero-optic effects of mixing layer with low velocity ratio is more serious than the others flow fields.Meanwhile,the effects of different optical parameters on Strehl ratio are studied and the corresponding laws are obtained.
作者
邢博阳
蔡彬
杨波
张斌
XING Boyang;CAI Bin;YANG Bo;ZHANG Bin(School of Aeronautics and Astronautics,Shanghai Jiao Tong University,Shanghai 200240;Shanghai Aerospace Control Technology Institute,Shanghai 201109)
出处
《飞控与探测》
2021年第2期51-57,共7页
Flight Control & Detection
基金
上海航天技术研究院-上海交大航天先进技术联合研究中心资助项目(USCAST2016-06)。
关键词
混合层
气动光学
图像偏移
斯特列尔比
mixing layer
aero-optic effects
image shift
Strehl ratio
