The influence of rotating cylinder with curved plates on Vortex-Induced Vibration

To suppress Vortex-Induced Vibration (VIV) and reduce its hazards on practical marine engineering applications, this paper studies a model of rotatable cylinder with curved plates, investigating the influence of rotation and curved plates on VIV. The model is numerically solved based on SST k - ω turbulence model. The displacement and other parameters are calculated using the Newmark- β method. The results show that the rotatable curved plates in the initial branch, upper branch, and lower branch have an inhibitory effect on the VIV. When reduced velocity is low, the curved plates play a crucial role in the vortex shedding. But as reduced velocity increases, rotation becomes the key factor affecting the vortex shedding. When reduced velocity is 5, the 2 curved plates have the best effect. Furthermore, the rotation angle of the cylinder increases as reduced velocity increases. When the rotation angle becomes too large, it actually promotes the vibration. • This research presents a model of rotatable cylinder with curved plates. • The number of the curved plates and rotation are studied. • Two curved plates have the best inhibitory effect on the vibration. • The rotating plates can disrupt the vortices and suppress the vibrations.