TOKUMARU, P. T. & DIMOTAKIS, P. E. 1991 "Rotary Oscillation Control of a Cylinder Wake," J. Fluid Mech. 224, 77-90.


Exploratory experiments have been performed on circular cylinders executing forced rotary oscillations in a steady uniform flow. Flow visualization and wake profile measurements at moderate Reynolds numbers have shown that a considerable amount of control can be exerted over the structure of the wake by such means. In particular, a large increase, or decrease, in the resulting displacement thickness, estimated cylinder drag, and associated mixing with the free stream can be achieved, depending on the frequency and amplitude of oscillation.