| Abstract:Abstract：It is of great significance to study the measurement and correction method of the infrared radiation characteristics of the side jet of the aircraft model in wind tunnel environment for carrying out wind tunnel tests. By solving the mass equation, the momentum equation, the energy equation, the component transfer equation and the radiation transfer equation, the numerical simulation of the side jet field of the aircraft model and the infrared radiation characteristics of each radiation source of 3-5μm in the wind tunnel environment is carried out. The results show that, under the conditions given in the paper, with the increase of Mach number Main at the entrance of the wind tunnel section, the penetration ability of the side jet decreases, the bow shock Angle above the nozzle outlet decreases, the jet core area shrinks, and the average temperature in the jet core area increases. The radiation intensity of the inner wall of the wind tunnel and the wall of the aircraft model increases, while the integrated radiation intensity of the side jet decreases first and then increases. The self-radiation of the inner wall of the wind tunnel is almost constant, and its reflected radiation gradually increases. The self-radiation of the aircraft model wall gradually increases, and its reflected radiation is very small and almost negligible. Through the analysis of the radiation characteristics of each radiation source, a method to modify the infrared radiation characteristics of the jet is finally obtained, which is suitable for the model and boundary conditions in this paper. The results in this paper can provide reference for the actual ground wind tunnel test. |