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Parametric study of reduced span side tapering on a simplified model with wheels

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conference contribution
posted on 23.04.2020, 13:43 by Max Varney, Martin Passmore, Ryan Swakeen, Adrian GaylardAdrian Gaylard
Many modern vehicles have blunt rear end geometries for design aesthetics and practicality; however, such vehicles are potentially high drag. The application of tapering; typically applied to an entire edge of the base of the geometry is widely reported as a means of reducing drag, but in many cases, this is not practical on real vehicles. In this study side tapers are applied to only part of the side edge of a simplified automotive geometry, to show the effects of practical implementations of tapers.
The paper reports on a parametric study undertaken in Loughborough University’s Large Wind Tunnel with the ¼ scale Windsor model equipped with wheels. The aerodynamic effect of implementing partial side edge tapers is assessed from a full height taper to a 25% taper in both an upper and lower body configuration. These were investigated using force and moment coefficients, pressure measurements and planar particle image velocimetry (PIV). These geometries showed that the drag reductions are maximised with a 50% span, generating a vertically symmetric wake and less taper drag contribution when compared to a full span taper.

Funding

Jaguar Land Rover and the UK EPSRC under an industrial CASE aware (Voucher No. 15220097)

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Published in

SAE Technical Papers

Source

WCX 2020 SAE World Congress Experience

Publisher

SAE International

Version

AM (Accepted Manuscript)

Rights holder

© SAE International

Publisher statement

This paper was accepted for publication in SAE Technical Papers and the definitive published version is available at https://doi.org/10.4271/2020-01-0680.

Publication date

2020-04-14

Copyright date

2020

Notes

Due to concerns around the rapidly evolving coronavirus (COVID-19) pandemic, SAE International made the difficult decision to cancel the WCX 2020 World Congress Experience, originally scheduled for April 21-23, in Detroit.

ISSN

0148-7191

eISSN

2688-3627

Language

en

Location

Detroit, USA

Event dates

21st April 2020 - 23rd April 2020

Depositor

Mr Max Varney. Deposit date: 21 April 2020

Article number

2020-01-0680

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