Naslov
Aerodynamic loads on a vehicle exposed to cross-wind gusts: An experimental study

Autori
Kozmar, Hrvoje ; Butler, Kyle ; Kareem, Ahsan

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of Seventh Asia-Pacific Conference on Wind Engineering (APCWE-VII) / - Taipei, 2009

Skup
Seventh Asia-Pacific Conference on Wind Engineering (APCWE-VII)

Mjesto i datum
Taipei, Tajvan, 08.11.2009. - 12.11.2009

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Bluff body aerodynamics; cross-wind gusts; vehicle; bridge; transient aerodynamic loads; experiments

Sažetak
This paper presents experimental results concerning transient aerodynamic loads experienced by a vehicle. Two vehicle models were tested, one with wheels and the other one without wheels. Both models were separately placed on a bridge deck section and exposed to an air flow which consisted of an intermittent gusting, alternating between two velocity thresholds. Experimental results indicate key features for future investigations: an increase in steady aerodynamic loads in periods of wind gusts and two different unsteady phenomena. Wind gusting affects both vehicle models, exhibited in the power spectra of wind loads fluctuations as a low frequency peak at 0.3 Hz, corresponding to switching between lower and higher velocity, observed in both configurations. Vortex shedding from the bridge predominantly influences unsteady loads on a vehicle without wheels, exhibited in the power spectra of unsteady aerodynamic forces and moments as a strong high frequency peak at 10 Hz due to vortex shedding.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Građevinarstvo, Tehnologija prometa i transport

POVEZANOST RADA