Effects of Mass and Damping on Flow-Induced Vibration of a Cylinder Interacting with the Wake of Another Cylinder at High Reduced Velocities

Md. Mahbub Alam
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Md. Mahbub Alam: Center for Turbulence Control, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China

Energies, 2021, vol. 14, issue 16, 1-13

Abstract: Flow-induced vibration is a canonical issue in various engineering fields, leading to fatigue or immediate damage to structures. This paper numerically investigates flow-induced vibrations of a cylinder interacting with the wake of another cylinder at a Reynolds number Re = 150. It sheds light on the effects of mass ratio m * , damping ratio, and mass-damping ratio m * ζ on vibration amplitude ratio A/D at different reduced velocities Ur and cylinder spacing ratios L/D = 1.5 and 3.0. A couple of interesting observations are made. The m * has a greater influence on A/D than ζ although both m * and ζ cause reductions in A/D . The m * effect on A/D is strong for m * = 2–16 but weak for m * > 16. As opposed to a single isolated cylinder case, the mass-damping m * ζ is not found to be a unique parameter for a cylinder oscillating in a wake. The vortices in the wake decay rapidly at small ζ . Alternate reattachment of the gap shear layers on the wake cylinder fuels the vibration of the wake cylinder for L/D = 1.5 while the impingement and switch of the gap vortices do the same for L/D = 3.0.

Keywords: vibration response; damping ratio; flow-induced vibration; mass ratio; reduced velocity; wake interaction; energy harvesting (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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