NEW CFD MODEL ANALYSIS APPLIED TO HIGH SPEED PROJECTILES: MAGNUS EFFECT

This paper reports on a new numerical way to simultaneously and fully couple unsteady free-flight aerodynamics and flight trajectories. The numerical choices may facilitate tackling of variable body geometry in time through the immersed boundary technique. Clever modeling assembly is initially presented and validated. The steps highlighted in the paper involve the 2(n)tree automatic meshing coupled with an immersed boundary technique designed to depict not only academic test cases but also a gyro-stabilized projectile. Boattail geometry is analyzed and our results on the boattail angle are found to generally be in close congruence with the results reported in the literature. Finally the rotation effect is addressed on a boattail gyro-stabilized projectile and the Magnus force is estimated for several working conditions (angle of incidence, Mach number).