Ground effect phenomena about lift and downforce generating cambered aerofoils

Jonathan W. Vogt (School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, Australia)
Tracie J. Barber (School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, Australia)

International Journal of Numerical Methods for Heat & Fluid Flow

ISSN: 0961-5539

Publication date: 23 March 2012

Abstract

Purpose

Investigations into ground effect phenomena about aerofoils are typically conducted on either an upright (lift‐producing) or inverted (downforce‐producing) configuration, in isolation. This limited approach does not promote a holistic understanding of how ground effect influences aerofoils. This paper aims to address this issue.

Design/methodology/approach

A two‐dimensional computational fluid dynamics investigation was conducted on the highly cambered Tyrrell aerofoil, in both its upright and inverted configurations, in order to better understand ground effect phenomena by observing how it influences each configuration differently. The trends in force and flow field behaviour were observed at various ground clearances through observation of the normal and drag forces and pressure coefficient plots. The aerofoil was held stationary and at a constant angle of attack of 6 degrees, with a moving ground plane to simulate the correct relative motion.

Findings

The different ground effect mechanisms that occur on each configuration are highlighted and explained. It is shown how ground effect manifests through these different phenomena and that there are general or overarching mechanisms that influence both configurations. These general mechanisms allow unintuitive phenomena, such as the downward movement of the stagnation point on both configurations, to be explained.

Originality/value

Overarching mechanisms of ground effect are discovered which are of value in any situation in which ground effect aerodynamics is to be exploited.

Keywords

Citation

Vogt, J. and Barber, T. (2012), "Ground effect phenomena about lift and downforce generating cambered aerofoils", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 22 No. 2, pp. 153-174. https://doi.org/10.1108/09615531211199809

Download as .RIS

Publisher

:

Emerald Group Publishing Limited

Copyright © 2012, Emerald Group Publishing Limited

Please note you might not have access to this content

You may be able to access this content by login via Shibboleth, Open Athens or with your Emerald account.
If you would like to contact us about accessing this content, click the button and fill out the form.
To rent this content from Deepdyve, please click the button.