Research on the aero-thermal effects by 3D analysis model of the optical window of the infrared imaging guidance

Bo Xu; Lin Li; Ying Zhu

doi:10.1117/12.2072390

21 November 2014 Research on the aero-thermal effects by 3D analysis model of the optical window of the infrared imaging guidance

Bo Xu, Lin Li, Ying Zhu

Author Affiliations +

Proceedings Volume 9296, International Symposium on Optoelectronic Technology and Application 2014: Advanced Display Technology; Nonimaging Optics: Efficient Design for Illumination and Solar Concentration; 92960G (2014) https://doi.org/10.1117/12.2072390
Event: International Symposium on Optoelectronic Technology and Application 2014, 2014, Beijing, China

Abstract

Researches on hypersonic vehicles have been a hotspot in the field of aerospace because of the pursuits for higher speed by human being. Infrared imaging guidance is playing a very important role in modern warfare. When an Infrared Ray(IR) imaging guided missile is flying in the air at high speed, its optical dome suffers from serious aero-optic effects because of air flow. The turbulence around the dome and the thermal effects of the optical window would cause disturbance to the wavefront from the target. Therefore, detected images will be biased, dithered and blurred, and the capabilities of the seeker for detecting, tracking and recognizing are weakened. In this paper, methods for thermal and structural analysis with Heat Transfer and Elastic Mechanics are introduced. By studying the aero-thermal effects and aero-thermal radiation effects of the optical window, a 3D analysis model of the optical window is established by using finite element method. The direct coupling analysis is employed as a solving strategy. The variation regularity of the temperature field is obtained. For light with different incident angles, the influence on the ray propagation caused by window deformation is analyzed with theoretical calculation and optical/thermal/structural integrated analysis method respectively.

Citation Download Citation

Bo Xu, Lin Li, and Ying Zhu "Research on the aero-thermal effects by 3D analysis model of the optical window of the infrared imaging guidance", Proc. SPIE 9296, International Symposium on Optoelectronic Technology and Application 2014: Advanced Display Technology; Nonimaging Optics: Efficient Design for Illumination and Solar Concentration, 92960G (21 November 2014); https://doi.org/10.1117/12.2072390

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