Experimental investigation of the wake of a lifting wing with cut-in sinusoidal trailing edges
File(s)
Author(s)
Prigent, SL
Buxton, O
Bruce, PJK
Type
Conference Paper
Abstract
The wake behind a NACA0012 wing at incidence with cut-in sinusoidal trailing edges
(TE) is experimentally investigated. A wing model with interchangeable trailing edges is
used to study their impact on the wake properties. Both vertical and span-wise traverses
of hot-wires are done at different downstream positions, to obtain the downstream evolution
of statistical properties and to perform spectral analysis. Stereoscopic particle image
velocimetry is used to study the flow structure in a span-wise/cross-stream plane.
Span-wise inhomogeneity of the velocity deficit and of the wake width is observed and
explained by the presence of a span-wise/cross-stream flow induced by the cut-in modifications.
Spectral analysis shows a decrease of shedding intensity with shorter TE wavelength,
with up to 57% reduction when compared to a straight blunt wing. Blunt sinusoidal TEs
offer a reduction of span-wise correlation compared to the blunt straight one, which is
mitigated when compared to an unmodified wing. A sharp cut-in design is also studied,
that exhibits a more broad-band shedding spike at a lower frequency.
(TE) is experimentally investigated. A wing model with interchangeable trailing edges is
used to study their impact on the wake properties. Both vertical and span-wise traverses
of hot-wires are done at different downstream positions, to obtain the downstream evolution
of statistical properties and to perform spectral analysis. Stereoscopic particle image
velocimetry is used to study the flow structure in a span-wise/cross-stream plane.
Span-wise inhomogeneity of the velocity deficit and of the wake width is observed and
explained by the presence of a span-wise/cross-stream flow induced by the cut-in modifications.
Spectral analysis shows a decrease of shedding intensity with shorter TE wavelength,
with up to 57% reduction when compared to a straight blunt wing. Blunt sinusoidal TEs
offer a reduction of span-wise correlation compared to the blunt straight one, which is
mitigated when compared to an unmodified wing. A sharp cut-in design is also studied,
that exhibits a more broad-band shedding spike at a lower frequency.
Date Issued
2016-01-04
Date Acceptance
2016-01-02
Citation
2016
Publisher
American Institute of Aeronautics and Astronautics
Copyright Statement
Copyright © 2015 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved. Simon L. Prigent, Oliver Buxton, and Paul J. Bruce. "Experimental investigation of the wake of a lifting wing with cut-in sinusoidal trailing edges", 54th AIAA Aerospace Sciences Meeting, AIAA SciTech, (AIAA 2016-0852).
Sponsor
Commission of the European Communities
Grant Number
FP7 - 317269
Source
54th AIAA Aerospace Sciences Meeting
Publication Status
Published
Start Date
2016-01-04
Finish Date
2016-01-08
Coverage Spatial
San Diego, CA, U.S.A.