Effects of Deterministic Wind Gusts on Unsteady Crosswind Aerodynamics of Road Vehicles
2009 (English)Report (Other academic)
The relative flexibility of nowadays numerical methods offers an alternative way to experiments in order to investigate unsteady crosswind aerodynamics in an industrial framework. In this study, time accurate methods such as Detached-Eddy Simulations (DES) are used to simulate the flow. A simple vehicle shape, the so-called Windsor model, is chosen for the model. The ReL of the corresponding flow case is 2.0x106. Then, different deterministic models of wind gusts that are varied in the streamwise and the vertical direction are tested. The magnitude of the gusts models corresponds to a yaw angle of 20o. The aerodynamic loads calculated show a large excess of drag coupled with a reduction of the pitch moment. Although the side force has a smooth variation in the gust, overshoots up to 18% higher than the steady value of yaw moment are also observed.
Place, publisher, year, edition, pages
2009. , 16 p.
Trita-AVE, ISSN 1651-7660 ; 2009:76
Vehicle Engineering Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-11324OAI: oai:DiVA.org:kth-11324DiVA: diva2:273715
ProjectsEco2 Crosswind stability and unsteady aerodynamics
QC 201010122009-10-232009-10-232010-10-12Bibliographically approved