Key Laboratory of IR and Low Temperature Plasma of Anhui Province

Hefei, China

Key Laboratory of IR and Low Temperature Plasma of Anhui Province

Hefei, China

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Feng Y.,Key Laboratory of IR and Low Temperature Plasma of Anhui Province | Lu X.,Key Laboratory of IR and Low Temperature Plasma of Anhui Province | Ling Y.,Key Laboratory of IR and Low Temperature Plasma of Anhui Province | Zhou R.,The Peoples Liberation Army 94782 Division
Guangdian Gongcheng/Opto-Electronic Engineering | Year: 2013

The infrared characteristics of an air target's scarfskin are very important for the detection and identification of the air target. Referring to a certain oversea air target, its flight path was set. Aerodynamic heating and radiation from environment being considered comprehensively, one dimensional heat conduction equations were established about the air target's scarfskins. These equations were solved with backward difference approximation, and then temperature distributions of the scarfskins were achieved in 4:00 AM~4:45 AM and 12:00 PM~12:45 PM. Finally, influence of environment radiation being considered, while time and space changing, the infrared radiant intensity distributions of the scarfskins were calculated numerically in 3 ~ 5 μm and 8 ~ 14 μm. The result shows that far infrared radiant intensity of the scarfskins is far more than their middle infrared radiant intensity and the infrared characteristics have few changes when the air target flights.


Feng Y.,State Key Laboratory of Pulsed Power Laser Technology | Feng Y.,Key Laboratory of IR and Low Temperature Plasma of Anhui Province | Lu Y.,State Key Laboratory of Pulsed Power Laser Technology | Lu Y.,Key Laboratory of IR and Low Temperature Plasma of Anhui Province | And 2 more authors.
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | Year: 2013

Predigesting geometrical model of a certain aircraft was established, and its flight path was set. Aerodynamic heating and radiation from sun, ground and atmosphere were considered comprehensively, then physical models of heat conduction were founded against three shielding coatings with different emissivity and physical characteristic of stealth aircraft skin. Based on one dimensional heat conduction equation, temperature distributions of skins with different emissivity were calculated between 12:00 pm and 12:45 pm. Finally, influence of environment radiation was considered, the infrared radiant intensity distributions of skins with different emissivity were calculated numerically in 3-5 μm and 8-14 μm. The result improves that with skin emissivity reducing the infrared radiant intensity of skin diminishes at a certain extent, but due to influence of environment radiation, the effect of aircraft infrared stealth is not ideal only by skin emissivity decreasing.

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