Experimental investigation of aero-optical effect due to supersonic turbulent boundary layer

被引：0
|
作者：
Ding H. [1 ]
Yi S. [1 ]
Fu J. [1 ]
Zhu Y. [1 ]
He L. [1 ]
机构：
[1] College of Aerospace Science and Engineering, National University of Defense Technology, Changsha
来源：
| 1600年 / Chinese Society of Astronautics卷 / 45期
关键词：
Aero-optical; BOS; PSF; Turbulent boundary layer;
D O I：
10.3788/IRLA201645.1018007
中图分类号：
学科分类号：
摘要：
When a planar optical wavefront is made to propagate through a supersonic turbulent boundary, affected by the density fluctuation, its propagation direction and phase will change, which make target image blur, shifting, jitter et al and bring problems for target identification. By using the BOS-based Wavefront Sensing (BOS-WS) technique based on the principle of Background Oriented Schlieren (BOS), the optical wavefront propagated through a Ma=3.0 supersonic turbulent boundary layer was acquired. Based on the wave optics principles, the corresponding Point Spread Function (PSF) distribution and degraded image were computed. The research results show that many changes are found on the PSF peak value, peak value location and shape. The PSF peak value deceases largely, the PSF value peak position appears a significant move, the PSF shape appears multi peaks phenomenon, the spatial randomness of turbulent boundary layer density distribution is obtained, the image appears to a certain degree degradation after the PSF processing. © 2016, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
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页数：7
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