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《Optical Technique》 2007-05
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The simulation of transient infrared signature and stealthy technology of ground targets

CHEN Xuan,YUAN Jiang-tao,YANG Li(Academy of Ship and Power Engineering,Naval University of Engineering,Wuhan 430033,China)  
Aiming at the ground military targets which are easy attacked by infrared homing weapon,the infrared radiation signatures of them are simulated and analyzed.By using proper hypothesis,a three-dimensional radiation and convection conjugate heat transfer problem is simplified into one-dimensional heat transfer problem,and with finite-difference techniques,the direction fig of temperature field of the target is calculated and simulated.Based on these,in diffident position of the target(roof and side),the relationship between the convective emissivity needed in stealth and difference in temperature and the relationship of the convective emissivity with time are got.The results show that there is apparent difference in temperature between the target and background,and the max difference in temperature is 10℃.By using water fog stealth to limit the difference in temperature within 2℃,the good stealthy effect is achieved.
【CateGory Index】: TN219
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