On the near-wake of a ground-effect diffuser with passive flow control

Show simple item record

dc.contributor.author Ehirim, Obinna
dc.contributor.author Knowles, Kevin
dc.contributor.author Saddington, A. J.
dc.contributor.author Finnis, Mark V.
dc.contributor.author Lawson, Nicholas J.
dc.date.accessioned 2019-02-19T17:28:33Z
dc.date.available 2019-02-19T17:28:33Z
dc.date.issued 2019-02-08
dc.identifier.citation Ehirim O, Knowles K, Saddington A, et al., (2019) On the near-wake of a ground-effect diffuser with passive flow control. International Journal of Automotive Technology, Volume 20, Issue 1, February 2019, pp. 11-23 en_UK
dc.identifier.issn 1229-9138
dc.identifier.uri http://doi.org/10.1007/s12239-019-0002-2
dc.identifier.uri http://dspace.lib.cranfield.ac.uk/handle/1826/13923
dc.description.abstract A ground-effect diffuser is an upwardly-inclined section of an automobile’s underbody which increases aerodynamic performance by generating downforce. To understand the diffuser flow physics (force behaviour, surface and off-surface flow features), we established the near-wake (within one vehicle width of the base) velocity profiles and flow structures of an automotive ground-effect diffuser using a bluff body with a 17 degree slanted section forming the plane diffuser ramp surface (baseline geometry), and endplates extending along both sides of the ramp. Wind tunnel experiments were conducted at a Reynolds number of 1.8 million based on the bluff body length, and laser Doppler velocimetry was used to measure two-dimensional velocity components on three planes of the diffuser near-wake. We also measured the velocity field in the near-wake of diffusers with modified geometry (with an inverted wing or a convex bump) as passive flow control devices. The near-wake velocity profiles indicated that the passive flow control methods increased the diffuser flow velocity and that the longitudinal vortices along the diffuser determined the shape of the flow structures in the near-wake of the diffuser bluff body en_UK
dc.language.iso en en_UK
dc.publisher Springer Verlag en_UK
dc.rights Attribution-NonCommercial 4.0 International *
dc.rights.uri http://creativecommons.org/licenses/by-nc/4.0/ *
dc.subject Laser Doppler Velocimtery en_UK
dc.subject Ground Effect en_UK
dc.subject Diffuser en_UK
dc.subject Flow Control en_UK
dc.title On the near-wake of a ground-effect diffuser with passive flow control en_UK
dc.type Article en_UK
dc.identifier.cris 22290793

Files in this item

The following license files are associated with this item:

This item appears in the following Collection(s)

Show simple item record

Attribution-NonCommercial 4.0 International Except where otherwise noted, this item's license is described as Attribution-NonCommercial 4.0 International

Search CERES


My Account