70th Annual Meeting of the APS Division of Fluid Dynamics (November 19, 2017 — November 21, 2017)

V0067: Complete Suppression of Fully-Developed Vortex Shedding and Vortex-Induced Vibration for a Cylinder in Cross-Flow by Release of an Internal Nonlinear Energy Sink

  • Antoine Blanchard, University of Illinois at Urbana-Champaign
  • Arne Pearlstein, University of Illinois at Urbana-Champaign
DOI: https://doi.org/10.1103/APS.DFD.2017.GFM.V0067

For a Reynolds number (24) below the critical value for a fixed circular cylinder, we show how fully-developed, large-amplitude, vortex-induced vibration of a linearly-sprung cylinder can be completely suppressed by release of an internal rotating "nonlinear energy sink," consisting of a mass rotating about the axis of the translating cylinder and a dissipative element that damps the rotational motion of the mass. The approach involves no modification to the cylinder boundary, with the effects being due to inertial coupling of the rotation of the internal mass to the rectilinear motion of the cylinder. The results have significant implications for flow control, and for "on/off switching" of mixing.

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