Experimental analysis of flow structures and forces on a 3D-bluff-body in constant cross-wind |
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| Authors: | M Gohlke J F Beaudoin M Amielh F Anselmet |
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| Institution: | 1.PSA Peugeot Citro?n,Direction de la Recherche et de l’Innovation Automobile,Vélizy-Villacoublay Cedex,France;2.Institut de Recherche sur les Phénomènes Hors équilibre,CNRS, Universités d’Aix Marseille,Marseille,France |
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| Abstract: | The effect of cross-wind on a bluff-body in ground proximity is analysed experimentally. A recently introduced wind-tunnel
model is used to analyse the effect of flow structures on the global forces and global moments. This study aims at creating
a large database of the flow produced in the proximity of this bluff-body and giving some new insight into the physical mechanisms
responsible for the increase in force in cross-wind situations. The importance of the model’s lee side to the global yawing
moment is put forward. Two vortices are identified and changes in the slope of the yawing moment versus yaw angle are attributed
to their presence. |
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