PNS (Parabolized Navier-Stokes) computations for spinning and fin-stabilized projectiles at supersonic velocities

The Parabolized Navier-Stokes (PNS) computational technique has been applied to calculate the three-dimensional viscous flow about a standard spinning projectile and a long L/D finned projectile. The results for the spinning projectile are compared with past PNS computations and wind tunnel pressure and force measurements in order to benchmark the update version of the code. Excellent agreement is found and the improvements to the code are shown to provide greater computational efficiency. Results are then presented for the finned projectile configuration and comparison made with predictions from an inviscid code and values from a data base compiled from range firings.