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Experiments in Fluids
Published in: Experiments in Fluids 5/2004

01-11-2004 | Original Paper

Cavitation as a complementary tool for automotive aerodynamics

Authors: J. F. Beaudoin, O. Cadot, J. L. Aider, K. Gosse, P. Paranthoën, B. Hamelin, M. Tissier, D. Allano, I. Mutabazi, M. Gonzales, J. E. Wesfreid

Published in: Experiments in Fluids | Issue 5/2004

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Abstract

The wake of a 3D bluff body is studied in a hydrodynamic flow. The high Reynolds number (about 2×106) corresponds to the case of a full-scale road vehicle in a wind tunnel. A cavitation technique is proposed to identify the lowest pressure regions. It is found that these regions correspond to the two longitudinal vortices produced at the edges of the rear part of the vehicle. This technique also provides non-intrusive bulk measurements of the pressure minimum. It is found that the pressure coefficient of the longitudinal vortices is equal to Cp=−1.67, which underlines their strong contribution to the global drag. We show that cavitation can be a very useful technique to get three-dimensional information which is difficult to obtain through classical wind tunnel measurements.
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Metadata
Title
Cavitation as a complementary tool for automotive aerodynamics
Authors
J. F. Beaudoin
O. Cadot
J. L. Aider
K. Gosse
P. Paranthoën
B. Hamelin
M. Tissier
D. Allano
I. Mutabazi
M. Gonzales
J. E. Wesfreid
Publication date
01-11-2004
Publisher
Springer-Verlag
Published in
Experiments in Fluids / Issue 5/2004
Print ISSN: 0723-4864
Electronic ISSN: 1432-1114
DOI
https://doi.org/10.1007/s00348-004-0879-y

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