ANALYSIS OF GAS-DYNAMIC PROCESSES AND DEVELOPMENT OF A MODEL OF FLOWS IN THE HYPERSONIC SHOCK TUNNEL
The simplified one-dimensional mathematical models of processes are considered which describe the formation and propagation of shock waves, depression waves, and contact discontinuities in shock tunnels. These models are based on quasi-one-dimensional equations of radiative gas dynamics. Experimental and theoretical studies of formation and propagation of shock waves, depression waves, and contact discontinuities with the use of shock tunnels were always of significant interest, while recently they have developed appreciably. It is associated with the fact that shock tunnels are a most convenient tool of laboratory research in such fields of current importance in the modern science and technology as aero physics and chemical kinetics, gas dynamics, and molecular physics. A large role is also played by the fact that the flows of a multicomponent gas, which undergoes chemical conversions and the oscillatory and electron excitation, take place in many modern technological and power plants, hypersonic aircrafts. Here the relatively simple object for creating nonequilibrium processes in gases is a shock wave propagating in a tube with a circular or rectangular section (this geometry of the shock wave section allows the gas-dynamic flow pattern in the working channel to be simplified visibly)