Aerodynamic Heating And Thermal Response Analysis Of Hypersonic Vehicle

Aerodynamic heating is unavoidable when space vehicle reentry the atmosphere, it is a crucial task to do this research for providing ample theory and data for reentry technology.Firstly, all the aerodynamic heating methods developed by others are analyzed systematically and classified. All these classic methods are synthesized. On this basis, the engineering estimation method of the aerodynamic heating and the simplified formulas are introduced. Not considering the rejection, the ablation and some other factors, the heating rates around two dimension plate and three dimension hemisphere are calculated by above engineering method. And the distributing curves of surface temperature which is used as the aerothermal condition are simulated by MATLAB.Secondly, the finite element method of the temperature field and the thermal tress field are introduced, based on this, the three dimensional thermal conductive and mechanical model is established and the temperature field caused by aerothermal is calculated. Because of the axial symmetry, the question is simplified into two-dimension calculation. Highly it values the physical unit and pay attention to the energy conservation in the whole process of calculation.Finally, thermal stress of carbon matrix composite material missile head is analyzed . When computing the thermal stress field, the sequential coupling solution of the coupled fields analysis module in ANSYS is used to calculated the the thermal stress field with the boundary condition of temperature T_w. The temperature effect which has been calculated is taken as 'thermal load' forced on the body as a transform thinking in the process, then such thermal stress is settled as general elasticity mechanics question, surly an effective way to do so also with finite element method. In conclusion, this paper presents quite an integrated discourse from aerodynamic heating to its after effects-temperature change and heat stress. Based on the sound theory, it develops a credible and steady way to calculate. The program is easy to execute with high precision and it has certain value of engineering application.