2015-01-1560 Repository.pdf (3.14 MB)
Influence of short rear end tapers on the base pressure of a simplified vehicle
journal contribution
posted on 2015-06-03, 11:09 authored by Anna Perry, Martin Passmore, Ashley FinneyThis paper looks into the effect on base pressure of applying a high
aspect ratio chamfer to all edges of a simplified squareback model
(the Windsor model). The effects are investigated using force and
moment measurements along with surface pressure measurements on
the slanted surface and vertical base. The work forms part of a larger
study to develop understanding of the mechanisms that influence
overall base pressure and hence the resulting aerodynamic drag.
A short slant (approx. 4% of model length) was applied to the trailing
edges of the simplified vehicle model, representing the small rear end
optimisation typical of many real vehicle geometries. Two
experiments were performed: the first applied a chamfer at varying
angles to the top and bottom edges; the second test looked at the
same chamfer angle applied to the sides of the model geometry while
the top and bottom angle remained square. The changes in drag are
discussed and explained in the context of the base pressures and area
weighted pressure coefficients.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering
Published in
SAE Int. J. Passeng. Cars - Mech. SystVolume
8Issue
1Pages
1 - 11 (11)Citation
PERRY, A.K., PASSMORE, M.A. and FINNEY, A., 2015. Influence of short rear end tapers on the base pressure of a simplified vehicle. SAE International Journal of Passenger Cars- Mechanical Systems, 8 (1), pp. 317-327.Publisher
© SAE InternationalVersion
- AM (Accepted Manuscript)
Publication date
2015Notes
Copyright © 2015 SAE International. This paper is posted on this site with permission from SAE International, and is for viewing only. Further use or distribution of this paper is not permitted without permission from SAE.Publisher version
Language
- en