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An Active-Flow-Control (AFC) device, designed to unload the wing of the V-22 tilt-rotor aircraft in hover when the rotors blow down on it, is studied by Detached-Eddy Simulation (DES). The device is a zero-net-flux jet through a slot on the flap shoulder, designed to help the flow turn and follow the highly-deflected flap more closely. The details of the DES are presented, including boundary conditions,...