Drag optimization for axisymmetric afterbodies with jet plume using computational fluid dynamics

A supersonic turbulent flow over an axisymmetric body is numerically studied using the Navier-Stokes equations in conjunction with the k-? turbulence model. Numerical calculations of total body drag (including wave drag, skin friction drag, and base drag) were carried out for a boat tailed projectile with and without base-bleed. Surface pressures and viscous layer profiles are in good agreement with experimental data. Golden Section optimization was adopted to optimize the body boat tail. This optimization may be used as a tool for preliminarily design of axisymmetric boat tailed bodies