Numerical Study of Crosswind Stability of a Simplified Car in Gusty Wind
Paper in proceedings, 2010

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.

hysteresis

vehicle aerodynamic

LES

large eddy simulations

Author

Sinisa Krajnovic

Chalmers, Applied Mechanics, Fluid Dynamics

Anders Bengtsson

Chalmers, Applied Mechanics, Fluid Dynamics

Lars Davidson

Chalmers, Applied Mechanics, Fluid Dynamics

Branislav Basara

Chalmers, Applied Mechanics, Fluid Dynamics

8th MIRA International Vehicle Aerodynamics Conference

Driving Forces

Sustainable development

Areas of Advance

Transport

Subject Categories

Fluid Mechanics and Acoustics

More information

Created

10/8/2017