Perturbation of Vortex Induced Vibrations on a Square Section Cylinder
نویسندگان
چکیده
This paper addresses the vibration of a square section cylinder due to the alternate vortex shedding at moderate Reynolds number (3500). The numerical investigation is focused on the perturbation of the vortex shedding in order to decrease the amplitude of the vibrations at lock-in. By analyzing the unsteady flow results, we show that a control technique spatially localized at the surface of the cylinder, can be efficient only if the mean flow is modified, or/and that the energy input, i.e. the cost function, becomes very large.
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