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Numerical Study of Crosswind Stability of a Simplified Car in Gusty Wind

Sinisa Krajnovic (Institutionen för tillämpad mekanik, Strömningslära) ; Anders Bengtsson (Institutionen för tillämpad mekanik, Strömningslära) ; Lars Davidson (Institutionen för tillämpad mekanik, Strömningslära) ; Branislav Basara (Institutionen för tillämpad mekanik, Strömningslära)
8th MIRA International Vehicle Aerodynamics Conference (2010)
[Konferensbidrag, refereegranskat]

This paper present 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 investigation. Furthermore, the differences in LES flows between quasi-steady and dynamic flow conditions are presented and underlying flow mechanisms are explored. The cause for phenomena of hysteresis and phase shift was found in the inertia of the flow to adjust to sudden changes in direction of the oscillation of the body.

Nyckelord: LES, large eddy simulations, vehicle aerodynamic, hysteresis



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Denna post skapades 2011-01-18. Senast ändrad 2014-09-29.
CPL Pubid: 134958

 

Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Strömningslära

Ämnesområden

Transport
Hållbar utveckling
Strömningsmekanik

Chalmers infrastruktur