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24 November 2021 A calculation approach for shock layer radiation and transmittance towards hypersonic infrared homing vehicle
Mingqi Pang, Zelin Shi, Daijun Zhang, Haizheng Liu
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Proceedings Volume 12061, AOPC 2021: Infrared Device and Infrared Technology; 1206119 (2021) https://doi.org/10.1117/12.2606307
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China
Abstract
In order to study the optical transmission and radiation characteristics in a hypersonic shock layers over infrared optical window, an approximation calculation approach is proposed. With this method, the formal solution for shock layer radiative transport equation is derived considering both target signature and windows thermal radiance. Consequently, the transmissivity of heating shock layer can be expressed quantitatively, which shows that the shock layer is optically thick in the 4~4.5μm band mainly. Besides, the radiance flux density of shock layer is calculated when temperature is 800K, pressure is 7atm and thickness is 1cm. Shock layer radiance is found to be larger in the mid-wave infrared band compared with long-wave infrared band and short-wave infrared band.
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Mingqi Pang, Zelin Shi, Daijun Zhang, and Haizheng Liu "A calculation approach for shock layer radiation and transmittance towards hypersonic infrared homing vehicle", Proc. SPIE 12061, AOPC 2021: Infrared Device and Infrared Technology, 1206119 (24 November 2021); https://doi.org/10.1117/12.2606307
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KEYWORDS
Infrared radiation
Carbon dioxide
Imaging infrared seeker
Transmittance
Absorption
Mid-IR
Target detection
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