Flow-induced vibration of a circular cylinder with splitter plates placed upstream and downstream individually and simultaneously
By Hongjun Zhu, Guomin Li, Junlei Wang. 2020
158 citations recorded by the source corpus.
Abstract Flow-induced vibration (FIV) of a circular cylinder with splitter plates placed upstream and downstream individually and simultaneously at a low Reynolds number of 120 is numerically investigated using the direct numerical simulation (DNS). The effects of the downstream plate length and the arrangement of plates on the hydrodynamic forces, vibration response and flow wake are examined. The numerical results reveal that a downstream plate alleviates the vortex-induced vibration (VIV) at Ur≤9 (Ur is the reduced velocity) while exciting the galloping at Ur>9. The reattachment of shear layers on the plate surface generates an extra lift force, contributing to the galloping. The longer the plate, the larger the onset reduced velocity of galloping, which is associated with the jump of vibration amplitude and lift fluctuation as well as the fall of frequencies of vibration and vortex shedding. With the introduction of an upstream plate, the boundary layers develop along the plate before attaching on the cylinder surface, while the vortex shedding is delayed and flow wake is narrowed as compared to the bare cylinder, contributing to the VIV suppression. The galloping excited by the rear plate is eliminated by simultaneously placing an upstream plate, and the best suppression of VIV is achieved by the bilateral plates due to the more streamlined profile.
Subfields: Computational Mechanics, Control and Systems Engineering, Environmental Engineering
View Paper: https://www.semanticscholar.org/paper/b7c836dbd3ef7ed3428ff850b4a28399b451faa7
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In Computational Mechanics
In Control and Systems Engineering
Citations in the corpus
- Hybrid wind energy scavenging by coupling vortex-induced vibrations and galloping (2020, background): “In 65 conclusion, VIVPES is significantly proper for scavenging energy from low-speed flow for its 66 low threshold flow speed [39,40].”