Two- and three-dimensional simulations of the flow around straked cylinders are presented. For the two-dimensional simulations we used the Spectral/hp Element Method, and carried out simulations for five different angles of rotation of the cylinder with respect to the free stream. Fixed and elastically-mounted cylinders were tested, and the Reynolds number was kept constant and equal to 150. The results were compared to those obtained from the simulation of the flow around a bare cylinder under the same conditions. We observed that the two-dimensional strakes are not effective in suppressing the vibration of the cylinders, but also noticed that the responses were completely different even with a slight change in the angle of rotation of the body. The three-dimensional results showed that there are two mechanisms of suppression: the main one is the decrease in the vortex shedding correlation along the span, whilst a secondary one is the vortex wake formation farther downstream.
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ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering
July 1–6, 2012
Rio de Janeiro, Brazil
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4492-2
PROCEEDINGS PAPER
Two- and Three-Dimensional Simulations of the Flow Around a Cylinder Fitted With Strakes Available to Purchase
Bruno S. Carmo,
Bruno S. Carmo
University of São Paulo, São Paulo, SP, Brazil
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Rafael S. Gioria,
Rafael S. Gioria
University of São Paulo, São Paulo, SP, Brazil
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Ivan Korkischko,
Ivan Korkischko
University of São Paulo, São Paulo, SP, Brazil
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Cesar M. Freire,
Cesar M. Freire
University of São Paulo, São Paulo, SP, Brazil
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Julio R. Meneghini
Julio R. Meneghini
University of São Paulo, São Paulo, SP, Brazil
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Bruno S. Carmo
University of São Paulo, São Paulo, SP, Brazil
Rafael S. Gioria
University of São Paulo, São Paulo, SP, Brazil
Ivan Korkischko
University of São Paulo, São Paulo, SP, Brazil
Cesar M. Freire
University of São Paulo, São Paulo, SP, Brazil
Julio R. Meneghini
University of São Paulo, São Paulo, SP, Brazil
Paper No:
OMAE2012-83603, pp. 781-790; 10 pages
Published Online:
August 23, 2013
Citation
Carmo, BS, Gioria, RS, Korkischko, I, Freire, CM, & Meneghini, JR. "Two- and Three-Dimensional Simulations of the Flow Around a Cylinder Fitted With Strakes." Proceedings of the ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. Volume 5: Ocean Engineering; CFD and VIV. Rio de Janeiro, Brazil. July 1–6, 2012. pp. 781-790. ASME. https://doi.org/10.1115/OMAE2012-83603
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