Sixth International Symposium on Turbulence and Shear Flow Phenomena
DOI: 10.1615/TSFP6
Rapid modification of the flow field about a free moving airfoil by controlled, trapped vorticity concentrations
pages 873-878
DOI: 10.1615/TSFP6.1400
SINOPSIS
The dynamic coupling between trailing edge flow control and the unsteady motion of a maneuvering airfoil is investigated in wind tunnel experiments. The airfoil is mounted on a 2-DOF traverse and the commanded maneuvers are effected without moving control surfaces. Bi-directional changes in the pitching moment over a range of angles of attack are effected by controllable, nominally-symmetric trapped vorticity concentrations on both the suction and pressure surfaces near the trailing edge. Manipulation and regulation of vorticity concentrations are effected by hybrid actuators comprised of a miniature [Ο(0.01c)] obstruction integrated with synthetic jet actuators.