Despite the big interest in both, micro-air vehicles (MAV) and flow-control strategies, only few studies have investigated the flow-control possibilities over low aspect ratio (LAR) wings flying at low Reynolds numbers (Re). The present study verified the LAR thick airfoils' conformity with the nonlinear lift approximation equation. Then, a moving-wall flow control method was designed and tested over an LAR thick airfoil (0.57 aspect ration (AR), NACA0015 shaped) performing at a chord-based Re of 4 × 104. The moving belt control postponed the stall onset by 25 deg and produced a 103% gain in lift without any saturation signs at a control speed ratio of Ub/U = 6. Particle image velocimetry (PIV) measurements confirmed the effectiveness of the moving-wall control strategy on the upper surface flow reattachment. Moreover, other quantities such as the, vortices, and the swirling strength are investigated.

Issue Section:
Flows in Complex Systems
Keywords:
Aerodynamics , Boundary layers, Drag, Experimental techniques, Lift, Measurement techniques, PIV, Turbulence, Vortices, Fluid mechanics
Topics:
Airfoils, Belts, Flow (Dynamics), Flow control, Vortices, Wings, Wind tunnels, Drag (Fluid dynamics), Separation (Technology), Particulate matter

References

1.
McMasters
,
J.
, and
Henderson
,
M.
,
1980
, “
Low-Speed Single-Element Airfoil Synthesis
,”
Tech. Soar.
,
6
(
2
), pp.
1
–
21
.http://journals.sfu.ca/ts/index.php/ts/article/view/989
2.
Mueller
,
T. J.
,
2000
, “
Aerodynamic Measurements at Low Reynolds Numbers for Fixed Wing Micro-Air Vehicles
,” Notre Dame University, Notre Dame, IN.
3.
Spedding
,
G.
, and
McArthur
,
J.
,
2010
, “
Span Efficiencies of Wings at Low Reynolds Numbers
,”
J. Aircr.
,
47
(
1
), pp.
120
–
128
.
Google Scholar
Crossref
Search ADS
 
4.
Krishnan
,
A.
,
Kumar
,
G.
,
Deters
,
R. W.
, and
Selig
,
M. S.
,
2014
, “
Propeller-Induced Flow Effects on Wings of Varying Aspect Ratio at Low Reynolds Numbers
,”
AIAA
Paper No. 2014-2152.
5.
Ringuette
,
M. J.
,
Milano
,
M.
, and
Gharib
,
M.
,
2007
, “
Role of the Tip Vortex in the Force Generation of Low-Aspect-Ratio Normal Flat Plates
,”
J. Fluid Mech.
,
581
, pp.
453
–
468
.
Google Scholar
Crossref
Search ADS
 
6.
Yang
,
L.
,
Li
,
J.
,
Cai
,
J.
,
Wang
,
G.
, and
Zhang
,
Z.
,
2016
, “
Lift Augmentation Based on Flap Deflection With Dielectric Barrier Discharge Plasma Flow Control Over Multi-Element Airfoils
,”
ASME J. Fluids Eng.
,
138
(
3
), p.
031401
.
Google Scholar
Crossref
Search ADS
 
7.
Michelis
,
T.
, and
Kotsonis
,
M.
,
2015
, “
Flow Control on a Transport Truck Side Mirror Using Plasma Actuators
,”
ASME J. Fluids Eng.
,
137
(
11
), p. 111103.
8.
LaTunia
,
G.
,
Melton
,
P.
, and
Koklu
,
M.
,
2016
, “
Active Flow Control Using Sweeping Jet Actuators on a Semi-Span Wing Model
,”
AIAA
Paper No. 2016-1817.
9.
Seele
,
R.
,
Tewes
,
P.
,
Woszidlo
,
R.
,
McVeigh
,
M. A.
,
Lucas
,
N. J.
, and
Wygnanski
,
I. J.
,
2009
, “
Discrete Sweeping Jets as Tools for Improving the Performance of the V-22
,”
J. Aircr.
,
46
(
6
), pp.
2098
–
2106
.
Google Scholar
Crossref
Search ADS
 
10.
Gilarranz
,
J. L.
,
Traub
,
L. W.
, and
Rediniotis
,
O. K.
,
2005
, “
A New Class of Synthetic Jet Actuators—Part II: Application to Flow Separation Control
,”
ASME J. Fluids Eng.
,
127
(
2
), pp.
377
–
387
.
Google Scholar
Crossref
Search ADS
 
11.
Boukenkoul
,
M.
,
Li
,
F.
, and
Aounallah
,
M.
,
2017
, “
A 2D Simulation of the Flow Separation Control Over a NACA0015 Airfoil Using a Synthetic Jet Actuator
,” Second International Conference on Mechanical and Aeronautical Engineering (ICMAE), Hong Kong, China, Dec. 28–30, Paper No.
012007
.
12.
Prandtl
,
L.
,
1925
, “
The Magnus Effect and Wind-Powered Ships
,”
Naturwissenschaften
,
13
(
6
), pp.
93
–
108
.
Google Scholar
Crossref
Search ADS
 
13.
Seifert
,
J.
,
2012
, “
A Review of the Magnus Effect in Aeronautics
,”
Prog. Aerosp. Sci.
,
55
, pp.
17
–
45
.
Google Scholar
Crossref
Search ADS
 
14.
Gad-el Hak
,
M.
, and
Bushnell
,
D. M.
,
1991
, “
Separation Control: Review
,”
ASME J. Fluids Eng.
,
113
(
1
), pp.
5
–
30
.
Google Scholar
Crossref
Search ADS
 
15.
Gad-el Hak
,
M.
,
Pollard
,
A.
, and
Bonnet
,
J.-P.
,
1998
,
Flow Control: Fundamentals and Practices
, Vol.
53
,
Springer-Verlag
,
Berlin
.
16.
Brooks
,
J. D.
,
1963
, “
The Effect of a Rotating Cylinder at the Leading and Trailing Edges of a Hydrofoil
,” Naval Ordnance Test Station, China Lake, CA, Technical Report No.
NOTS-TP-3036
.http://www.dtic.mil/dtic/tr/fulltext/u2/403808.pdf
17.
Alvarez-Calderon
,
A.
,
1964
, “
High Lift and Control System for Aircraft
,” U.S. Patent No.
3,140,065
.http://www.google.co.in/patents/US3140065
18.
Johnson
,
W.
,
Tennant
,
J.
, and
Stamps
,
R.
,
1975
, “
Leading-Edge Rotating Cylinder for Boundary-Layer Control on Lifting Surfaces
,”
J. Hydronautics
,
9
(
2
), pp.
76
–
78
.
Google Scholar
Crossref
Search ADS
 
19.
Modi
,
V.
,
Sun
,
J.
,
Akutsu
,
T.
,
Lake
,
P.
,
McMillan
,
K.
,
Swinton
,
P.
, and
Mullins
,
D.
,
1981
, “
Moving-Surface Boundary-Layer Control for Aircraft Operation at High Incidence
,”
J. Aircr.
,
18
(
11
), pp.
963
–
968
.
Google Scholar
Crossref
Search ADS
 
20.
Mokhtarian
,
F.
, and
Modi
,
V.
,
1988
, “
Fluid Dynamics of Airfoils With Moving Surface Boundary-Layer Control
,”
J. Aircr.
,
25
(
2
), pp.
163
–
169
.
Google Scholar
Crossref
Search ADS
 
21.
Mokhtarian
,
F.
,
Modi
,
V.
, and
Yokomizo
,
T.
,
1988
, “
Rotating Air Scoop as Airfoil Boundary-Layer Control
,”
J. Aircr.
,
25
(
10
), pp.
973
–
975
.
Google Scholar
Crossref
Search ADS
 
22.
Modi
,
V.
,
Munshi
,
S.
,
Bandyopadhyay
,
G.
, and
Yokomizo
,
T.
,
1998
, “
High-Performance Airfoil With Moving Surface Boundary-Layer Control
,”
J. Aircr.
,
35
(
4
), pp.
544
–
553
.
Google Scholar
Crossref
Search ADS
 
23.
Al-Garni
,
A. Z.
,
Al-Garni
,
A. M.
,
Ahmed
,
S. A.
, and
Sahin
,
A. Z.
,
2000
, “
Flow Control for an Airfoil With Leading-Edge Rotation: An Experimental Study
,”
J. Aircr.
,
37
(
4
), pp.
617
–
622
.
Google Scholar
Crossref
Search ADS
 
24.
Rae
,
W. H.
, and
Pope
,
A.
,
1984
,
Low-Speed Wind Tunnel Testing
,
Wiley
,
New York
, Chap. 8.
25.
Torres
,
G. E.
, and
Mueller
,
T. J.
,
2004
, “
Low Aspect Ratio Aerodynamics at Low Reynolds Numbers
,”
AIAA J.
,
42
(
5
), pp.
865
–
873
.
Google Scholar
Crossref
Search ADS
 
26.
Liu
,
Y.-C.
, and
Hsiao
,
F.-B.
,
2012
, “
Aerodynamic Investigations of Low-Aspect-Ratio Thin Plate Wings at Low Reynolds Numbers
,”
J. Mech.
,
28
(
1
), pp.
77
–
89
.
Google Scholar
Crossref
Search ADS
 
27.
Chen
,
W.-L.
,
Gao
,
D.-L.
,
Yuan
,
W.-Y.
,
Li
,
H.
, and
Hu
,
H.
,
2015
, “
Passive Jet Control of Flow Around a Circular Cylinder
,”
Exp. Fluids
,
56
(
11
), p.
201
.
Google Scholar
Crossref
Search ADS
 
28.
Polhamus
,
E. C.
,
1971
, “
Predictions of Vortex-Lift Characteristics by a Leading-Edge Suction Analogy
,”
J. Aircr.
,
8
(
4
), pp.
193
–
199
.
Google Scholar
Crossref
Search ADS
 
29.
Lamar
,
J. E.
,
1974
, “
Extension of Leading-Edge-Suction Analogy to Wings With Separated Flow Around the Side Edges at Subsonic Speeds
,” NASA Langley Research Center, Hampton, VA, Technical Report No.
NASA-TR-R-428
.https://ntrs.nasa.gov/search.jsp?R=19740026346
30.
Li
,
F. C.
,
Chen
,
Y. B.
,
Wei
,
J. J.
, and
Kawaguchi
,
Y.
,
2012
,
Turbulent Drag Reduction by Surfactant Additives
,
Wiley
,
Singapore
, pp.
233
–
254
.
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