Study Of One-dimension Trajectory Correction Projectile Aerodynamic Characteristic

The modern warfare proposed a higher request to the accuracy of the armament system, the trajectory correction projectile was the improved form of the conventional ammunition. It not only had the higher attack precision, but also costed far less than the missile, therefore its application prospect was extremely broad.The present paper taked the one-dimension trajectory correction projectile which use a drag ring to correct range as the research object. By the wind tunnel experiments, it was analyzed that how the drag rings affected the projectiles' drag coefficient, lift coefficient, pitching-moment coefficient and the pressure center coefficient from two aspects: drag ring's position and outspread area. Then the corrected trajectory model was established based on the characteristic of the one-dimensional trajectory correction and the simulation analysis to the abilities of different drag rings was carried on. The paper also presented the estimate formula of the drag coefficient in subsonic, transonic and supersonic flow so that the designer can estimate projectiles' drag coefficient fast and relative accurately. All of these provided references for the design of one-dimension trajectory correction projectiles.