Modeling of dynamics of unsteady flows near blunt bodies for large time intervals
Inhomogenious compressible flows are assumed to be self-oscillatory, according to the suggested and developed mechanism of self-oscillations. Inhomogenious flows near cylinders and cones with spherical blunts are modeled numerically, namely flows with a subsonic isobaric jet in the outer supersonic stream and flows with a backward supersonic jet running out from a forehead surface. Well known self-oscillatory interactions of supersonic jet with a plane surface and with a cavity are considered as test problems. Two dimensional Reynolds equations along with algebraic model of turbulent viscosity are solved by the third order Runge-Kutta scheme. Self-oscillations of various amplitudes and types are found in inhomogenious flows near cylinders and cones with spherical blunts.