University of Surrey

Test tubes in the lab Research in the ATI Dance Research

On the effect of discrete roughness on crossflow instability in very low turbulence environment

Placidi, Marco, van Bokhorst, Evelien and Atkin, Christopher J. (2016) On the effect of discrete roughness on crossflow instability in very low turbulence environment In: The 8th AIAA Flow Control Conference, AIAA AVIATION Forum, 13-17 Jun 2016, Washington, D.C., USA.

[img]
Preview
Text
On the effect of discrete roughness on the linear growth of crosssflow instability in very low turbulence environment.pdf - Accepted version Manuscript

Download (848kB) | Preview

Abstract

Wind tunnel experiments were conducted in a low-turbulence environment (Tu < 0:006%) on the stability of 3D boundary layers. The effect of two different distributions of discrete roughness elements (DREs) on crossfl ow vortices disturbances and their growth was eval uated. As previously reported, DREs are found to be an effective tool in modulating the behaviour of crossfl ow modes. However, the effect of 24μm DREs was found to be weaker than previously thought, possibly due to the low level of environmental disturbances here with. Preliminary results suggest that together with the height of the DREs and their spanwise spacing, their physical distribution across the surface also intimately affects the stability of 3D boundary layers. Finally, crossfl ow vortices are tracked along the chord of the model and their merging is captured. This phenomena is accompanied by a change in the critical wavelength of the dominant mode.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
NameEmailORCID
Placidi, Marcom.placidi@surrey.ac.uk
van Bokhorst, Evelien
Atkin, Christopher J.
Date : 13 June 2016
Funders : Engineering and Physical Sciences Research Council (EPSRC)
DOI : 10.2514/6.2016-3470
Copyright Disclaimer : © 2016 American Institute of Aeronautics and Astronautics, Inc.
Related URLs :
Depositing User : Clive Harris
Date Deposited : 18 Oct 2018 10:37
Last Modified : 11 Dec 2018 11:24
URI: http://epubs.surrey.ac.uk/id/eprint/849729

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800