Research On Design Method Of Hypersonic Wing Thermal Structure

Because of its excellent performance and great military and potential civilian value,hypersonic vehicles have become the cutting-edge technology in the field of aerospace research in various countries.However,there are still many problems that need to be solved.Aerodynamic heating is one of them.Due to the inherent disadvantages of ordinary thermal protection systems and the low degree of integration with aircraft,thermal structure that can both support and carry heat has become the hot spot in the structural design of hypersonic vehicles.Thermal structure design requires the structure to be able to bear and resist thermal deformation,thermal stress and thermal buckling caused by thermal loads.In order to design a thermal structure that meets the requirements,the paper first studies the calculation method of aircraft thermal load.The cold wall heat flow obtained using engineering calculation methods needs to be corrected according to related theories.Because of the limitation of software functions,the paper has written two sets of calculation programs to complete the cold wall heat flow correction process.The two programs have the characteristics of wide application range and high calculation efficiency,which can complement each other.Because the honeycomb structure has the characteristics of high strength,high rigidity and resistance to instability,honeycomb was selected as the form of hypersonic heat-resistant structure.The influence of the size parameter of the honeycomb structure on the thermal response results was studied in this paper for reference.The equivalent heat transfer parameters and equivalent mechanical parameters of the honeycomb structure are also given,which provides a basis for the engineering calculation of the honeycomb structure.Applying the above theory and analysis,the thermal structure of the actual hypersonic wing is designed.The honeycomb structure is used to calculate the thermal response of the hypersonic wing using the written program.The results show that the honeycomb structure can effectively resist the thermal load band and ensure that the wing meets the requirements for use.