Original title: The influence of the blockage effect on the aerodynamic characteristics of the bluff body in the air flow
Authors: Ledvinková, Blanka ; Hračov, Stanislav ; Macháček, Michael
Document type: Papers
Conference/Event: Computational mechanics 2024 /39./., Srní (CZ), 20241104
Year: 2024
Language: eng
Abstract: Experiments on airflow around bluff bodies were conducted in a confined space in a wind tunnel. The presence of the body induces the blockage effect—reducing the cross-sectional area of the tunnel and causing an increase in flow velocity. 2D simulations of flow around sharply edged bodies (a rectangle with a 2:1 side ratio and a U-profile with a non-porous barrier) were performed at various angles of attack using the RANS k-ω SST model to evaluate the influence of the blockage effect. Two different computational domains were used: the first, with spacing between confining walls matching the actual dimensions of the wind tunnel at our institute (1.9 m), and the second, with a width of 7.5 m, assuming the blockage effect to be negligible in this case. The mean drag and lift coefficients, fluctuating lift coefficient, and Strouhal number were evaluated for both cases.
Keywords: aerodynamic coefficients; blockage effect; bluff body; RANS simulation
Project no.: GA24-13061S (CEP)
Funding provider: GA ČR
Host item entry: Computational mechanics 2024. Proceedings of computational mechanics 2024, ISBN 978-80-261-1249-5

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: https://hdl.handle.net/11104/0357811

Permalink: http://www.nusl.cz/ntk/nusl-668242


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Research > Institutes ASCR > Institute of Theoretical and Applied Mechanics
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