Aerodynamic coefficients and pressure distribution on U-beams with porous flanges

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F25%3A00619500" target="_blank" >RIV/68378297:_____/25:00619500 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.21495/em2025-117" target="_blank" >https://doi.org/10.21495/em2025-117</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.21495/em2025-117" target="_blank" >10.21495/em2025-117</a>

Result language
angličtina
Original language name
Aerodynamic coefficients and pressure distribution on U-beams with porous flanges
Original language description
This study presents the results of wind tunnel experiments on U-shaped beams with either solid flanges or flanges with 50% porosity. Aerodynamic drag and lift coefficients, along with pressure coefficient distributions on the beam surfaces, were evaluated and compared for both configurations. The findings demonstrate that flange porosity significantly affects the aerodynamic forces and flow around the U-beam. Across most angles of attack, the solid-flange beam exhibited higher drag than the porous-flange beam. However, within the range of approximately −11.5° to −5.5°, the porous configuration showed higher drag. Furthermore, at negative angles of attack, the lift force on the porous-flanged beam acted in the opposite direction to that on the solid-flanged beam. Finally, incorporating flange porosity reduced the magnitude of suction pressures on both the top and bottom surfaces of the U-beam.
Czech name
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Czech description
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Project
<a href="/en/project/GA24-13061S" target="_blank" >GA24-13061S: The Combined Effects of Aeroelastic Instabilities on Civil Engineering Structures</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Engineering mechanics 2025. Book of full texts
ISBN
978-80-86246-96-3
ISSN
1805-8248
e-ISSN
1805-8256
Number of pages
4
Pages from-to
117-120
Publisher name
Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences
Place of publication
Prague
Event location
Medlov
Event date
May 12, 2025
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
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