To reduce the infrared radiation intensity of a subsonic aircraft tail,the infrared radiation characteristics of the aircraft tail were analyzed according to the infrared threat environment of the battlefield and infrared radiation characteristics of the aircraft.Based on the analysis results,a comprehensive infrared radiation suppression scheme was developed by adopting comprehensive infrared radiation suppression measures such as low-radiation nozzle,center cone film cooling,and infrared stealth shield of the tail cabin.In addition,the infrared stealth prototype of the aircraft tail was manufactured,for which ground infrared radiation intensity measurements were carried out.The infrared radiation intensities at multiple angles were measured for the aircraft's main threat band of 3-5μm.The measurement results show that the average infrared radiation intensity of the aircraft tail in the horizontal plane decreases by 47.6%in the band of 3-5μm after infrared adopting the radiation suppression measures.The average infrared radiation intensity of the aircraft tail in the vertical plane decreases by 54%,indicating a good infrared radiation suppression effect.
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