Numerical Simulation of Deflective Flow for the Low-Speed Revolving Cannonball

Based on the 3-dimension N-S equation, simulation of flow field over a low-speed spinning projectile at different rotate speed and angle of attack were carried out by using the standard k – ε turbulence model. Spinning was implemented through sliding mesh method, the generated mechanism of deflective flow for the low-speed revolving cannonball were analyzed by the flow field structure. Through numerical simulation, the lateral force and pressure coefficient along the cylinder' s surface were presented, and at last the influential factors of the deflective flow phenomenon were analyzed.