Název: Aerodynamic coefficients and pressure distribution on U-beams with porous flanges
Autoři: Macháček, Michael ; Hračov, Stanislav ; Dejmal, Karel
Typ dokumentu: Příspěvky z konference
Konference/Akce: Engineering mechanics 2025. International conference /31./, Medlov (CZ), 20250512
Rok: 2025
Jazyk: eng
Abstrakt: 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.
Klíčová slova: aerodynamic coefficients; porous flanges; pressure coefficients; U-shaped beam; wind tunnel testing
Číslo projektu: GA24-13061S (CEP)
Poskytovatel projektu: GA ČR
Zdrojový dokument: Engineering mechanics 2025. Book of full texts, ISBN 978-80-86246-96-3, ISSN 1805-8248

Instituce: Ústav teoretické a aplikované mechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v repozitáři Akademie věd.
Původní záznam: https://hdl.handle.net/11104/0366375

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-679010


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav teoretické a aplikované mechaniky
Konferenční materiály > Příspěvky z konference