Numerical simulation of film cooling effect and aero-optical effect of optical window

Haoxi Xiong; Shihe Yi; Haolin Ding; Xiwang Xu; Yang Si

doi:10.1117/12.2541395

18 December 2019 Numerical simulation of film cooling effect and aero-optical effect of optical window

Haoxi Xiong, Shihe Yi, Haolin Ding, Xiwang Xu, Yang Si

Proceedings Volume 11338, AOPC 2019: Optical Sensing and Imaging Technology; 113380C (2019) https://doi.org/10.1117/12.2541395
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China

Abstract

Supersonic cooling film can reduce the influence of aerodynamic heating to a certain extent, but the complex flow field structure formed by its interaction with the mainstream will cause imaging target offset, ambiguity and jitter, that is, aero-optical effect. In this paper, the variation of cooling efficiency and aero-optical effect at the optical window under different jet States is studied numerically, and the validity of the numerical method is verified by comparing the experimental results. The results show that the cooling efficiency at the optical window is higher and the aero-optical effect is smaller because of the proper total temperature of the cooling jet; The higher the supply pressure of cooling gas, the better the cooling efficiency of film cooling. In order to ensure the weakest aero-optical effect, the cooling gas supply is in pressure matching state; With the increase of Mach number of cooling gas injection, the cooling efficiency and aero-optical effect of supersonic film cooling increase; In general, nitrogen or air is chosen as cooling gas.

Citation Download Citation

Haoxi Xiong, Shihe Yi, Haolin Ding, Xiwang Xu, and Yang Si "Numerical simulation of film cooling effect and aero-optical effect of optical window", Proc. SPIE 11338, AOPC 2019: Optical Sensing and Imaging Technology, 113380C (18 December 2019); https://doi.org/10.1117/12.2541395

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KEYWORDS

Windows

Nitrogen

Refractive index

Ray tracing

Helium

Geometrical optics

Numerical analysis

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