Original title: Stability of a U-shaped profile and combination of wind flow velocity 0-18 m/s
Authors: Král, Radomil ; Kuznetsov, Sergeii ; Pospíšil, Stanislav ; Buljac, Andrija
Document type: Research reports
Year: 2013
Language: eng
Abstract: The report presents experimental results regarding the aero-elastic stability of a U-shaped profile withan aspect-ratio (along wind length B, frontal height H) of B/H = 4.65. In the literature it can be found that a square prism (B/H =1) can perform galloping oscillations. However, this is not the case for a flat rectangular prism (B/H = 10). The aspect ratio of the U-beam under consideration here lies between these two values. Additionally, the asymetry of the profile possibly introduces interesting effects. In a comprehensive study of B/H = 4 rectangulsr prism, it is shown experimentally that vortex-induced as well as self-excited one-degree of freedom vibrations are possible. Our investigation aims at understanding the excitation mechanism and estimate critical velocities. Simulations and, more recently wind tunnel experiments are used in our investigations.
Keywords: aero-elastic stability; U-shaped profile; wind tunnel
Project no.: ED1.1.00/02.0060
Funding provider: GA MŠk

Institution: Institute of Theoretical and Applied Mechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0232079

Permalink: http://www.nusl.cz/ntk/nusl-170578


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Research > Institutes ASCR > Institute of Theoretical and Applied Mechanics
Reports > Research reports