GLOBAL DYNAMICS AND AERODYNAMIC FLOW VECTORING OF WAKES

A methodology for vectoring the near-wake how behind a bluff body with out any mechanical movement of the physical boundaries of the generati ng body is described. The sole control input is suction applied at the fixed base of the forebody. Once the suction volume flux exceeds a cr itical value needed to suppress the global dynamics associated with vo rtex shedding, local directional control of the near wake can be achie ved. The distribution of suction velocities across the base can be var ied to obtain proportional directional control. The role of symmetries in stimulating aerodynamic vectoring of a streaming flow is emphasize d and illustrated.