Edge vortices of a double element wing in ground effect
Edge vortices of a double element wing in ground effect
The influence of edge vortices generated by a generic double-element wing on force behaviors are discussed. The wing is equipped with end plates and operates in ground effect. The downforce-vs-height curve is divided into three distinct regions according to ground proximity and flap setting. As the wing is moved from a height in freestream
to the ground plane, the downforce first experiences a rapid enhancement (region A). This process is accompanied by the presence of a concentrated vortex off the edge of the side plate and diffuser effect of the wing. At a critical height, the vortex breaks down and its contribution to the downforce is lost. This creates a change in the gradient of
the downforce slope. The force enhancement process continues as the height of the wing is reduced (region B); the
main diffuser effect is still present. The downforce is lost below a height where the maximum downforce is reached,
due to large separation on the wing (region C). The importance of the edge vortices in defining the characteristics
of the downforce curve is established.
1127-1137
Zhang, Xin
3056a795-80f7-4bbd-9c75-ecbc93085421
Zerihan, Jonathan
c71e1585-69bf-4085-8d62-8826452cfc7d
2004
Zhang, Xin
3056a795-80f7-4bbd-9c75-ecbc93085421
Zerihan, Jonathan
c71e1585-69bf-4085-8d62-8826452cfc7d
Zhang, Xin and Zerihan, Jonathan
(2004)
Edge vortices of a double element wing in ground effect.
Journal of Aircraft, 41 (5), .
Abstract
The influence of edge vortices generated by a generic double-element wing on force behaviors are discussed. The wing is equipped with end plates and operates in ground effect. The downforce-vs-height curve is divided into three distinct regions according to ground proximity and flap setting. As the wing is moved from a height in freestream
to the ground plane, the downforce first experiences a rapid enhancement (region A). This process is accompanied by the presence of a concentrated vortex off the edge of the side plate and diffuser effect of the wing. At a critical height, the vortex breaks down and its contribution to the downforce is lost. This creates a change in the gradient of
the downforce slope. The force enhancement process continues as the height of the wing is reduced (region B); the
main diffuser effect is still present. The downforce is lost below a height where the maximum downforce is reached,
due to large separation on the wing (region C). The importance of the edge vortices in defining the characteristics
of the downforce curve is established.
This record has no associated files available for download.
More information
Published date: 2004
Identifiers
Local EPrints ID: 22950
URI: http://eprints.soton.ac.uk/id/eprint/22950
ISSN: 0021-8669
PURE UUID: 4c4aba70-9ab8-4b6a-adb1-62cba60c4d9a
Catalogue record
Date deposited: 23 Mar 2006
Last modified: 08 Jan 2022 15:51
Export record
Contributors
Author:
Xin Zhang
Author:
Jonathan Zerihan
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics