| 超音速/高超音速飞行器湍流流场气动光学效应分析 |
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| 引用本文： | 杨文霞,蔡超,丁明跃,周成平.超音速/高超音速飞行器湍流流场气动光学效应分析[J].光电工程,2009,36(1). |
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| 作者姓名： | 杨文霞 蔡超 丁明跃 周成平 |
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| 作者单位： | 1. 华中科技大学图像识别与人工智能研究所,图像信息处理与智能控制教育部重点实验室,武汉430074;武汉理工大学理学院数学系,武汉430070
2. 华中科技大学图像识别与人工智能研究所,图像信息处理与智能控制教育部重点实验室,武汉430074 |
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| 摘 要： | 针对高超音速飞行器在大气中流动时所产生的气动光学效应进行定性和定量的分析与计算.通过对高速湍流流场N-S方程的CFD求解,得到在不同飞行参数下,飞行器外围流场的各种参数分布;再运用变折射率流场的光线追迹法,得到红外光在该非均匀变折射率流场中的传输路径;最后应用傅里叶光学理论,结合数值分析方法,计算得到高速湍流流场的气动光学效应传输函数.计算结果表明,气动光学传输函数的幅度响应函数具有低通特征,使得图像发生像模糊;其相位响应函数具有非线性的特点,导致红外成像非线性偏移.本文所得实验结果与理论分析相吻合.
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| 关 键 词： | 气动光学效应 光学传递函数 湍流 N-S方程 光线追迹 |
Numerical Analysis of Aero-optic Effects Induced by the Turbulence Flow Field Surrounding Super/Hypersonic |
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| YANG Wen-xia,CAI Chao,DING Ming-yue,ZHOU Cheng-ping.Numerical Analysis of Aero-optic Effects Induced by the Turbulence Flow Field Surrounding Super/Hypersonic[J].Opto-Electronic Engineering,2009,36(1). |
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| Authors: | YANG Wen-xia CAI Chao DING Ming-yue ZHOU Cheng-ping |
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| Affiliation: | YANG Wen-xia1,2,CAI Chao1,DING Ming-yue1,ZHOU Cheng-ping1 ( 1. Institute of IPRAI,Image Processing and Intelligence Control,Key Laboratory of Education Ministry of China,Huazhong University of Science and Technology,Wuhan 430074,China,2. Dept. of Mathematics,Wuhan University of Technology,Wuhan 430070,China ) |
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| Abstract: | Numerical simulation and analysis of aero-optic effects caused by the hyper-speed turbulence fields under different flight conditions were carried out. The aero-optic effects were characterized with the associated optical transfer functions. First, the analysis and computation of the aero-optic effect under different flight conditions were addressed, where the parameters characterizing the hyper-speed turbulence field were obtained by solving its N-S equations via CFD methods. The infrared ray trajectories ... |
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| Keywords: | aero-optic effects optical transfer function turbulence N-S equations ray tracing |
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