Year: 2025
Type: conference-paper
Abstract: 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.
Source: Engineering Mechanics ...
DOI: 10.21495/em2025-117
Authors: M. Macháček, S. Hračov, K. Dejmal
Language: English
Subfield: Computational Mechanics
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4410503164