This paper aims to discuss the effectiveness of a new passive kind of VIV (Vortex Induced Vibrations) suppression. Moreover, the proposed solutions leads to a significant drag reduction when compared with conventional proposals (strakes for instance). The concept of guided porosity is applied in experimental tests conducted with low mass ratio cylindrical models. The works also shows that the job (VIV control and drag reduction) is achieved without moving parts, in contrast with segmented fairings. It also advances in terms of the omnidirectional solution. Initially, the concept is discussed in terms of the potential theory. Then experimental results are presented in terms of displacements and forces.
VIV Control and Drag Reduction Using the Guided Porosity Concept
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Fernandes, AC, Coelho, FM, Franciss, R, & Neto, SFS. "VIV Control and Drag Reduction Using the Guided Porosity Concept." Proceedings of the ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. Volume 1: Offshore Technology. Estoril, Portugal. June 15–20, 2008. pp. 441-447. ASME. https://doi.org/10.1115/OMAE2008-57471
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