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The effect of aspect ratio on the wake of the Ahmed body

Venning, James and Lo Jacono, David and Burton, David and Thompson, Mark C. and Sheridan, John The effect of aspect ratio on the wake of the Ahmed body. (2015) Experiments in Fluids, 56 (6). 1-11. ISSN 0723-4864

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Official URL: http://dx.doi.org/10.1007/s00348-015-1996-5

Abstract

This paper seeks to further elucidate the wake of the Ahmed body by investigating how the time-averaged flow structures vary with frontal aspect ratio. High-resolution particle image velocimetry results are provided for eight different width Ahmed geometries at Re = 3 × 10^4. It is shown that the narrower the body, the greater the downwash over the back slant, meaning the flow remains more attached. At a critical aspect ratio ( AR = 1.9), the flow downstream changes. The separation over the back slant is shown to be affected by the AR, and this in turn has a significant effect on the circulation in the c-pillar vortices.

Item Type:Article
Additional Information:Thanks to Springer editor. The definitive version is available at http://link.springer.com The original PDF of the article can be found at Springer website : http://link.springer.com/article/10.1007/s00348-015-1996-5
HAL Id:hal-01167075
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Monash University (AUSTRALIA)
Laboratory name:
Funders:
Australian Research Council (ARC) - Centre National de la Recherche Scientifique (CNRS)
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Deposited On:23 Jun 2015 15:20

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