Numerical Prediction of Magnus Effect for Dual-Spin Projectile

Dual-spin projectile is comprised by precision guidance kit (PGK) and normal spin-stabilized projectile. The boundary layer of the dual-spin projectile body is affected by both PGK's tail flow and spin rate. In this paper, the normal force coefficient and side force coefficient were performed using steady-state Reynolds-averaged Navier-Stokes (RANS) for different PGK orientation angle, projectile body spin rate and angle of attack. From numerical predicted data, the normal force coefficient is found to be spin insensitive and the side force coefficient varies approximately linearly with spin rate. The slope of lines about side force coefficient versus spin rate are approximately constant for a constant angle of attack and Mach number, different PGK orientation angle just affects the intercept of lines.