Abstract: To investigate the effect of rotating band on the aerodynamic characteristics of high-speed spinning projectile, the second-order Roe-type upwind scheme and SST k-ω turbulence model are used to solve the three-dimensional Navier-Stokes equations. Moving boundary caused by the spinning of projectile is processed using sliding mesh method. The aerodynamic characteristics of 155 mm spinning projectile without rotating band are calculated, and the numerical results are in good agreement with the wind tunnel test data presented in Ref.［6］. The flow fields over high-speed spinning projectiles with and without rotating band are simualted under the conditions of different Mach numbers and angles of attack. By analyzing the differences of flow-field structures and aerodynamic characteristics, the conclusions are drawn as follows: the pressure distributions of two projectile models in front of rotating band are basically identical, but the rotating band structure increases the aerodynamic resistance area of the projectile, thus leading to the increase in resistance coefficient, and there is a great difference between the pressure distributions of the two spinning projectiles in the rear of the rotating band. This proves that the impact of the rotating band structure on the aerodynamic characteristics of spinning projectile cannot be neglected. Key

Key words: ordnancescienceandtechnology, spinningprojectile, rotatingband, aerodynamiccharacteristics, numericalsimulation