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Abstract

The 3D turbulent flow over a boat-tailed projectile is studied numerically at free-stream Mach numbers from 0.932 to 0.965 and the angle of attack of 6 deg. Formation and interaction of shock waves and local supersonic regions is scrutinized. Solutions of the Reynolds-averaged Navier-Stokes equations are obtained on unstructured meshes with finite-volume solvers of second-order accuracy. The solutions demonstrate intricate behavior of the pitching moment coefficient as a function of the free-stream Mach number. This is accounted for by interplay of local supersonic regions on the upper and lower surfaces of the projectile.