Kozmar, Hrvoje and Procino, Lorenzo and Borsani, Alessandra and Bartoli, Gianni (2012) Sheltering efficiency of wind barriers on bridges. = Sheltering efficiency of wind barriers on bridges. Journal of Wind Engineering and Industrial Aerodynamics, 107-10. pp. 274-284. ISSN 0167-6105. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. Kvartili JCR: Q1 (2012). Točan broj autora: 4.
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Abstract
Sheltering efficiency of wind barriers on viaducts was experimentally studied in a boundary layer wind tunnel. Effects of wind incidence angle on flow field characteristics in the wake of a wind barrier were reported. Mean velocity fields and vorticity fields were determined using the Particle Image Velocimetry (PIV) technique. Freestream velocities were measured using hot-wire and Pitot tube. Results indicate a possibility of wind-induced instability of high-sided vehicles at larger vertical incidence angles, especially in the traffic lane close to trailing edge of the bridge, as velocity fluctuations and mean freestream velocities approach the road surface when increasing the vertical incidence angle. Removing elements from the wind barrier causes very large local velocities immediately downstream from a barrier and strong vorticity in the entire area in the wake of a wind barrier. Variations in horizontal incidence angle do not seem to affect flow field characteristics significantly. Without a wind barrier, wind velocities on bridges reach 80 of the freestream velocity at height as low as 1. m full-scale along with very strong vorticity in the immediate vicinity of the road surface. © 2012 Elsevier Ltd.
| Item Type: | Article (["eprint_fieldopt_article_type_article" not defined]) |
|---|---|
| Keywords (Croatian): | Air flow fields; Boundary layer wind tunnel; Flow field characteristics; Free-stream velocity; Incidence angles; Local velocity; Mean velocities; On flow; Particle image velocimetry technique; Pitot tubes; Road surfaces; Traffic lanes; Trailing edges; Velocity fluctuations; Vorticity field; Wind barriers; Wind incidences; Wind tunnel tests; Wind velocities; Bridges; Efficiency; Flow fields; Roads and streets; Vorticity; Wakes; Wind tunnels; Velocity |
| Subjects: | TECHNICAL SCIENCE |
| Divisions: | 1400 Department of fluid mechanics > 1420 Chair of environment and construction aerodynamics |
| Indexed in Web of Science: | Yes |
| Indexed in Current Contents: | Yes |
| Quartiles: | Q1 (2012) |
| Date Deposited: | 28 Apr 2015 12:49 |
| Last Modified: | 27 Jul 2017 11:09 |
| URI: | http://repozitorij.fsb.hr/id/eprint/3938 |
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