عنوان مقاله [English]
In recent years, requirement to increase projectile performance has led to a great interest in high angle of attack aerodynamics. Projectile maneuverability is a concept which is defined by having the capability to perform at high angles of attack while maintaining attached flow over the tail, rather than the capability of performing a mission in minimum possible time. Interactions between body, wing and tail vortices can delay vortex breakdown over the wing and, as a result may, enhance projectile maneuverability. Studies showed that wing aspect ratio and tail location have a remarkable influence on the vortices, and their interactions, hence, on projectile maneuverability. In the present study, a series of experiments are carried out on a body-wing-tail configuration to investigate their interferences. A projectile model was designed with the capabilities of placing a horizontal tail at various locations and installing wings with different aspect ratios. A six-component balance was used to measure aerodynamic forces and moments. Flow visualization was performed to gain insight into the corresponding flow field. Results show that reducing wing and tail distances, increases lift and decreases drag at high angles of attack.