Numerical Investigation of Unsteady Crosswind Vehicle Aerodynamics using Time-Dependent Inflow Conditions
2008 (English)In: Seventh World MIRA International Vehicle Aerodynamics Conference, 2008Conference paper (Refereed)
Transient disturbances concerning ground vehicles are not only due to rail or road irregularities but are also caused by unsteady ambient wind conditions. This study presents a numerical investigation of unsteady crosswind aerodynamics by using the commercial software STAR-CD from CD-Adapco. The unsteadiness of the aerodynamics is introduced through time-dependent inflow boundary conditions that describe a jet flow according to Schlichting . The purpose of this study is to explore the validity of the commonly used numerical methods (URANS and DES) for the current crosswind application. To this end, simplified vehicle geometries are utilized, for which the experimental results of Chadwick et al.  are used as reference data.
Place, publisher, year, edition, pages
Vehicle Aerodynamics, crosswind aerodynamics, crosswind stability, Detached-Eddy Simulation
Fluid Mechanics and Acoustics Vehicle Engineering
IdentifiersURN: urn:nbn:se:kth:diva-11322ISBN: 978-1-906400-05-7OAI: oai:DiVA.org:kth-11322DiVA: diva2:273710
7th MIRA International Vehicle Aerodynamics Conference, Coventry, 22-23 October, 2008.
ProjectsECO2 crosswind stability and unsteady aerodynamics
QC 201010122009-10-232009-10-232016-05-23Bibliographically approved