Development of computational methods for numerical simulation of conjugated problems of gas dynamics and thermomechanics in composite structures of promising high-speed aircrafts

An algorithm for the numerical simulation of coupled aerodynamic and thermomechanical processes in composite structures of high-speed aircraft is proposed, which allows to calculate all parameters of the three-dimensional aerogasdynamic flow near the surface of the aircraft, the heat exchange on the surface, the internal heat-and-mass transfer processes in the construction of thermodecomposition polymer composite material, and dynamic processes of heat displacement in the composite construction, including the effects of changes in the elastic characteristics of the composite, variable thermal deformation, shrinkage caused by thermodecomposition, the formation of the internal pore pressure in the composite. An example of the numerical solution of the coupled problem of a model composite construction of high-speed aircraft, showing the possibility of the proposed algorithm is given. It is shown that due to the high temperatures of the aerodynamic heating of the structures there can appear a polymer phase thermodecomposition because of the polymer phase thermodecomposition and intensive internal gas generation into the structure of the material.