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Experimental Study of Unsteady Wakes Behind an Oscillating Car Model
Technical Paper
2005-01-0604
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This research focuses on the analysis of the instability of passenger vehicles associated with transient crosswind gusts. A new vehicle model, created to analyze the behavior of unsteady wakes on bluff bodies, is proposed. The tests presented here were performed on a squareback model animated by an oscillating yaw angle in a steady wind. The initial unsteady results were obtained for a yaw angle of 10°, a Reynolds number close to 106, and a maximum value of the Strouhal number of 0.07. The analysis of unsteady total-pressure tomographies and unsteady particle-image velocimetry (PIV) shows the presence of phase shifting and hysteresis that evolve as a function of the Strouhal number. This work was performed in the framework of a collaboration between the Conservatoire National des Arts et Métiers, (CNAM), the Ecole Nationale Supérieure de l’Aéronautique et de l’Espace (SUPAERO) and the European automotive constructor Peugeot Citroën SA.
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Authors
- F. Chometon - Conservatoire National des Arts et Métiers, Paris, France
- A. Strzelecki - Conservatoire National des Arts et Métiers, Paris, France
- V. Ferrand - Ecole Nationale Supérieure de l’Aéronautique et de l’Espace, Toulouse, France
- H. Dechipre - Ecole Nationale Supérieure de l’Aéronautique et de l’Espace, Toulouse, France
- P. C. Dufour - Ecole Nationale Supérieure de l’Aéronautique et de l’Espace, Toulouse, France
- M. Gohlke - Ecole Nationale Supérieure de l’Aéronautique et de l’Espace, Toulouse, France
- V. Herbert
Citation
Chometon, F., Strzelecki, A., Ferrand, V., Dechipre, H. et al., "Experimental Study of Unsteady Wakes Behind an Oscillating Car Model," SAE Technical Paper 2005-01-0604, 2005, https://doi.org/10.4271/2005-01-0604.Also In
SAE 2005 Transactions Journal of Passenger Cars: Mechanical Systems
Number: V114-6; Published: 2006-02-01
Number: V114-6; Published: 2006-02-01
References
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