Coherent structures shed by multiscale cut-in trailing edge serrations on lifting wings
File(s)
Accepted version
Author(s)
Prigent, SL
Buxton, ORH
Bruce, PJK
Type
Journal Article
Abstract
This experimental study presents the effect of multiscale cut-in trailing edge serrations on the coherent
structures shed into the wake of a lifting wing. Two-probe span-wise hot-wire traverses are performed
to study spectra, coherence, and phase shift. In addition, planar particle image velocimetry is used to
study the spatio-temporal structure of the vortices shed by the airfoils. Compared with a single tone
sinusoidal serration, the multiscale ones reduce the vortex shedding energy as well as the span-wise
coherence. Results indicate that the vortex shedding is locked into an arch-shaped cell structure. This
structure is weakened by the multiscale patterns, which explains the reduction in both shedding energy
and coherence.
structures shed into the wake of a lifting wing. Two-probe span-wise hot-wire traverses are performed
to study spectra, coherence, and phase shift. In addition, planar particle image velocimetry is used to
study the spatio-temporal structure of the vortices shed by the airfoils. Compared with a single tone
sinusoidal serration, the multiscale ones reduce the vortex shedding energy as well as the span-wise
coherence. Results indicate that the vortex shedding is locked into an arch-shaped cell structure. This
structure is weakened by the multiscale patterns, which explains the reduction in both shedding energy
and coherence.
Date Issued
2017-07-31
Date Acceptance
2017-07-10
Citation
Physics of Fluids, 2017, 29 (7)
ISSN
1070-6631
Publisher
AIP Publishing
Journal / Book Title
Physics of Fluids
Volume
29
Issue
7
Copyright Statement
© 2017 The Authors. Published by AIP Publishing.
Sponsor
Commission of the European Communities
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000406765200031&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
FP7 - 317269
Subjects
Science & Technology
Technology
Physical Sciences
Mechanics
Physics, Fluids & Plasmas
Physics
MODE DECOMPOSITION
FLAT-PLATE
NOISE
GENERATION
REDUCTION
AIRFOIL
Publication Status
Published
Article Number
ARTN 075107