Numerical simulation study on thermal radiation transmission and suppression in high-temperature sapphire window

Lei Gao; Zhongxu Jiang; Hongyu Tao

doi:10.1117/12.3037189

4 December 2024 Numerical simulation study on thermal radiation transmission and suppression in high-temperature sapphire window

Lei Gao, Zhongxu Jiang, Hongyu Tao

Author Affiliations +

Proceedings Volume 13283, Conference on Spectral Technology and Applications (CSTA 2024); 132833Z (2024) https://doi.org/10.1117/12.3037189
Event: Conference on Spectral Technology and Applications (CSTA 2024), 2024, Dalian, China

Abstract

When an aircraft equipped with infrared guidance systems flies at high Mach numbers through the atmosphere, the infrared window interacts strongly with the incoming flow, resulting in aerodynamic thermal radiation effects. This paper models the thermal radiation transmission for flat-panel side-window infrared windows, captures dynamic thermal noise images under ballistic conditions, and introduces spectral filtering techniques to mitigate intense radiation bands in sapphire windows, addressing varying radiation intensities across different bands. Simulation results indicate that, within this trajectory, the window temperature peaks at approximately 470K at the 9th second, with the highest image irradiance of 0.69W/m² in the 3-5μm band, and a non-uniformity of 0.0293 in the thermal noise image. After spectral filtering to suppress the 4.6-5μm band, the maximum image irradiance drops to 0.202W/m² , a reduction of 70.7%, with the non-uniformity decreasing to 0.0215, a reduction of 26.6%. The thermal radiation transfer calculation model and the spectral filtering techniques outlined in this paper offer valuable insights for mitigating aerodynamic thermal impacts and enhancing the performance of infrared detection systems by suppressing thermal radiation.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Lei Gao, Zhongxu Jiang, and Hongyu Tao "Numerical simulation study on thermal radiation transmission and suppression in high-temperature sapphire window", Proc. SPIE 13283, Conference on Spectral Technology and Applications (CSTA 2024), 132833Z (4 December 2024); https://doi.org/10.1117/12.3037189

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Windows

Infrared radiation

Infrared imaging

Sapphire

Thermal modeling

Optical filters

Keywords/Phrases

Search In:

Publication Years