This paper presents large eddy simulations of flow around a simplified vehicle model oscillating around its vertical axis. The frequency of St = 0.068 and relatively small amplitude of the oscillation are chosen to be representative for the crosswind conditions of vehicles on the road. The results were found to agree well with data from previous experimental investigations. Furthermore, the differences in LES flows between quasi-steady and dynamic flow conditions are presented and underlying flow mechanisms are explored. The cause of the phenomena of hysteresis and phase shift was found in the inertia of the flow to adjust to sudden changes in the direction of the oscillation of the body.
Numerical study of crosswind stability of a simplified car at gusty wind
Numerische Studie über die Seitenwindstabilität eines vereinfachten Fahrzeugmodells bei böigem Wind
2010
17 Seiten, 7 Bilder, 1 Tabelle, 26 Quellen
Conference paper
English
Unsteady vehicle aerodynamics in gusty crosswind
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