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Aerodynamic Effects of Strake Patterns on Flow around a Yawed Circular Cylinder

Published

Author(s)

Dong Hun Yeo, Nicholas P. Jones

Abstract

Strakes on a circular cylinder are often used for mitigation of cylinder vibrations and have been applied to reduction of large-amplitude vibrations of a stay cable in cable-stayed bridges, which occur under wind oblique to a cable with or without rainfall. This aerodynamic approach cannot be fully effective without understanding behavior of flow around and the associated forces on an oblique cable. To address this issue, flow around a yawed cylinder with various strake patterns was simulated in this study using three-dimensional detached eddy simulation. Effects of the strakes on aerodynamic forces on the cylinder were investigated. Results demonstrated that strake patterns strongly influence the development of flow structures around a yawed cylinder and therefore the associated forces on the cylinder. The results suggest that particular strake patterns are able to provide an aerodynamic approach that mitigates large-amplitude and low-frequency vibrations of stay cables induced by oblique wind.
Proceedings Title
International Symposium on Computational Wind Engineering
Conference Dates
May 23-27, 2010
Conference Location
Chapel Hill, NC

Keywords

Bridges, cable vibration, strakes, structural engineering, wind engineering, yawed cylinder

Citation

, D. and Jones, N. (2010), Aerodynamic Effects of Strake Patterns on Flow around a Yawed Circular Cylinder, International Symposium on Computational Wind Engineering, Chapel Hill, NC, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=905267 (Accessed April 14, 2024)
Created May 24, 2010, Updated February 19, 2017