The infrared imaging simulation of aircraft requires temperature field distribution under different flight conditions.In this study,the Standard k ε Model,SST k ε model and S A model are used to simulate the temperature field of the aircraft respectively,and the simulation accuracy and difference of the temperature field of the three turbulence models at different flight speeds and flight heights are studied.Further comparison with the theoretical values is made to select a suitable simulation model of the temperature field of the aircraft,in order to provide an important reference for the infrared imaging simulation of the aircraft.Firstly,MutiGen Creator software is used to establish the three dimensional geometric modeling of the aircraft.Secondly,surface mesh and volume mesh are generated in Hypemesh software and fluent mesh software in turn.Finally,Fluent 2022R1 software is used to simulate the static temperature field distribution of the vehicle,and the temperature field of the vehicle is simulated under different flight speeds and different altitudes by changing the turbulence model and the boundary condition settings,and compared with the theoretical results.By changing the turbulence model and boundary condition settings,the temperature field of the aircraft at different flight speeds and different altitudes is simulated numerically and compared with the theoretical results.The experimental results show that the three turbulence models can simulate the temperature of the inner wall of the nozzle and the skin of the aircraft better.The temperature of the skin of the aircraft rises with the increase of the flight Mach number,and decreases with the increase of the flight altitude,which is consistent with the theoretical results.In the tail nozzle inner wall surface temperature simulation,three kinds of turbulence model simulation of the inner wall surface temperature of the highest difference of 21 K,the relative error in 1.8% or so,in the infrared simulation of the approximate negligible,so the three kinds of turbulence model are suitable for tail nozzle inner wall surface temperature field simulation.And it can better simulate the effect of aerodynamic heating on the temperature field of the vehicle.The model is more accurate and more suitable for the simulation of the flow field of the aircraft,which can better simulate the effect of aerodynamic heating on the temperature field of the aircraft.