Establishment and simulation analysis of aircraft infrared radiation model

This article constructs infrared radiation models for aircraft skin, engine exhaust nozzle, and exhaust flow field. Through model construction, it can be concluded that the surface temperature of the skin is not only affected by the flight speed, but also by the flight altitude of the aircraft. The aircraft is a turbine engine, and the infrared radiation intensity is calculated based on the temperature of the gas in front of the turbine and the temperature of the tail nozzle in both non boosted and boosted states. Calculate the infrared radiation of the tail flame and the tail flame flow field in the infrared radiation model of the tail flame flow field. The average infrared radiance of the skin and tail flame of targets at different detection distances and flight heights at the entrance pupil of the detector was analyzed in the frequency bands of (3-5 μ m) and (9.5-11.5 μ m). The relationship between the infrared radiation of target plumes flying at different heights received by detectors in different bands and the detection distance. Generate infrared simulation images under medium and long wave detection conditions based on the different yaw, pitch, and roll angles of the aircraft, providing a data source.