Simulation and analysis of aerodynamic external flow field environment of scramjet-propelled vehicle
Aiming at the problem of insufficient research on aerodynamic environment prediction of scram-jet-propelled vehicle during flight,this paper is based on the ground wind tunnel data to execute the analysis on the correlation between simulation parameters and numerical accuracy and propose a simulation scheme for the aerodynamic environment with optimized parameters.The environmental prediction data indicate that scram-jet-propelled vehicle faces extremely harsh aerodynamic sound,vibration and thermal conditions during flight,with the values reaching 147 dB,182g and 2130 K,respectively.In terms of structural design,the leading edge of airfoil is directly exposed to more intense aerodynamic heating,necessitating the selection of materials with excel-lent heat resistance,and the anti-vibration design needs to give special attention to the position of trailing edge of airfoil.The use of new high-performance materials,such as chromium-nickel-iron alloys,could significantly en-hance the structural reliability and durability.In the environmental testing,the test range must fully cover the limit value of the above extreme aerodynamic environment,and the temperature rise speed of the thermal test should reach 83℃/s so as to simulate the thermal stress of the vehicle in the extreme environment.In addition,as the flow speed increases,the impact of aerodynamic heat on the structural vibration of the vehicle becomes increasingly significant,which further validates the importance of the combined thermal vibration test.
万方数据
维普
