Numerical simulation on infrared radiation characteristics of vertical take-off and landing nozzle
In order to improve the infrared stealth and maneuverability of aircraft exhaust system,a multi-axis cascade rotary vertical take-off and landing nozzle was developed and proposed,and the infrared radiation characteristics of nozzles in conventional cruise,vertical takeoff and landing and intermediate form S stealth modes were studied parameterized by using Malkmus statistical narrow band model and the reverse Monte Carlo method(RMCM).The results showed that compared to the conventional cruise mode nozzle,the infrared radiation intensity of the vertical takeoff and landing mode nozzle was reduced by a maximum of 23％and the S stealth mode nozzle by a maximum of 47％.And the relative angles of the cabins had a significant effect on the infrared radiation characteristics of the S stealth mode nozzle,and the relative angles of the cabins near the exit had little effect on the infrared radiation characteristics of the nozzle in vertical takeoff and landing mode.
exhaust systemvertical take-off and landing nozzleMalkmus statistical narrow band modelRMCMinfrared radiation
万方数据
维普
