Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Windbreak protection for road vehicles against crosswind
Abstract In this study, wind tunnel experiments and a Large Eddy Simulation (LES) model were used to investigate the protective effect of porous windbreak on road vehicles against crosswind. The model prediction of the side force and lift coefficients compared favorably with the wind tunnel experiments of vehicles on the ground. The simulation results of the wake flows behind porous windbreaks were verified by the results of wind tunnel experiments. Then the validated numerical model was used to inspect the effect of porous windbreaks for the protection of vehicles on a bridge. The flow conditions included four different windbreak heights (0, 1, 2 and 3m) and three different porosities (0, 0.233 and 0.485). The numerical results showed that the porous windbreaks could significantly reduce the side force coefficient of the vehicle, and the side force experienced by the vehicles on the windward lane of the bridge is smaller than that on the leeward lane because of the impermeable concrete barrier and windward windbreak. In addition, the shielding effect of the windbreak height of 2m plus the barrier of 0.8m height is sufficient to protect the vehicles of 3.6m height.
Highlights This paper investigates the windbreak protection against crosswind on road vehicle. The side force on vehicles were calculated by a Large Eddy Simulation model. The 2m high windbreak could significantly reduce the side force on the vehicle. The drag coefficients of the porous windbreaks are also calculated.
Windbreak protection for road vehicles against crosswind
Abstract In this study, wind tunnel experiments and a Large Eddy Simulation (LES) model were used to investigate the protective effect of porous windbreak on road vehicles against crosswind. The model prediction of the side force and lift coefficients compared favorably with the wind tunnel experiments of vehicles on the ground. The simulation results of the wake flows behind porous windbreaks were verified by the results of wind tunnel experiments. Then the validated numerical model was used to inspect the effect of porous windbreaks for the protection of vehicles on a bridge. The flow conditions included four different windbreak heights (0, 1, 2 and 3m) and three different porosities (0, 0.233 and 0.485). The numerical results showed that the porous windbreaks could significantly reduce the side force coefficient of the vehicle, and the side force experienced by the vehicles on the windward lane of the bridge is smaller than that on the leeward lane because of the impermeable concrete barrier and windward windbreak. In addition, the shielding effect of the windbreak height of 2m plus the barrier of 0.8m height is sufficient to protect the vehicles of 3.6m height.
Highlights This paper investigates the windbreak protection against crosswind on road vehicle. The side force on vehicles were calculated by a Large Eddy Simulation model. The 2m high windbreak could significantly reduce the side force on the vehicle. The drag coefficients of the porous windbreaks are also calculated.
Windbreak protection for road vehicles against crosswind
Chu, Chia-Ren (Autor:in) / Chang, Chao-Yen (Autor:in) / Huang, Chih-Jung (Autor:in) / Wu, Tso-Ren (Autor:in) / Wang, Chung-Yue (Autor:in) / Liu, Ming-Yi (Autor:in)
Journal of Wind Engineering and Industrial Aerodynamics ; 116 ; 61-69
16.02.2013
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Windbreak protection for road vehicles against crosswind
| Online Contents | 2013
Windbreak protection for road vehicles against crosswind
| Tema Archiv | 2013