Abstract

A computational fluid dynamics (CFD) investigation was carried out on a three-dimensional NACA6409 wing in ground effect at a Reynolds number of 320,000. Using a multi-objective-SHERPA algorithm, a root angle of 4 deg angle of attack, a tip angle of 6 deg, a forward sweep, and a tip chord of 20% of the root chord produced an optimum aerodynamic efficiency across all ground clearances. Optimization showed a gain in aerodynamic efficiency of 41% at h/c = 0.05 ground clearance and a 31% gain at h/c = 0.2 compared to a rectangular planform wing. Next, fish bone active camber (FishBAC) morphing was applied to the optimized wing varying the morphing start locations along the chord at both the tip and root. A later start location produced the highest aerodynamic efficiency but increased manufacturing complexity. Extendable span morphing was also tested and was found that increasing the span from 1c to 1.5c increased the aerodynamic efficiency of the optimized wing by 27.4% at h/c = 0.1. Varying the span from 0.8c to 1.2c in ground effect had a small effect on the drag for small ground clearances; for large ground clearances, the total drag decreased as the span increased. Smaller gains were seen when the span morphing was applied to the rectangular wing. The FishBAC morphing was applied in the spanwise direction to morph the wingtip, sealing the flow beneath the wing. Also, the proportion of the morphing wingtip caused the trailing edge to be closer to the ground further enhancing ground effect.

References

1.
Rozhdestvensky
,
K. V.
,
2006
, “
Wing-in-Ground Effect Vehicles
,”
Prog. Aerosp. Sci.
,
42
(
3
), pp.
211
283
.10.1016/j.paerosci.2006.10.001
2.
Clements
,
D.
, and
Djidjeli
,
K.
,
2023
, “
Aerodynamic Performance of Morphing and Periodic Trailing-Edge Morphing Airfoils in Ground Effect
,”
J. Aerosp. Eng.
,
36
(
3
), p.
4023012
.10.1061/JAEEEZ.ASENG-4707
3.
Qu
,
Q.
,
Jia
,
X.
,
Wang
,
W.
,
Liu
,
P.
, and
Agarwal
,
R. K.
,
2014
, “
Numerical Study of the Aerodynamics of a NACA 4412 Airfoil in Dynamic Ground Effect
,”
Aerosp. Sci. Technol.
,
38
, pp.
56
63
.10.1016/j.ast.2014.07.016
4.
Abramowski
,
T.
,
2007
, “
Numerical Investigation of Airfoil in Ground Proximity
,”
J. Theor. Appl. Mech.
,
45
(
2
), pp.
425
436
.https://www.researchgate.net/publication/228651914_Numerical_investigation_of_airfoil_in_ground_proximity
5.
Ahmed
,
M. R.
, and
Sharma
,
S. D.
,
2005
, “
An Investigation on the Aerodynamics of a Symmetrical Airfoil in Ground Effect
,”
Exp. Therm. Fluid Sci.
,
29
(
6
), pp.
633
647
.10.1016/j.expthermflusci.2004.09.001
6.
Jung
,
K. H.
,
Chunn
,
H. H.
,
Kim
,
H. J.
,
Chun
,
H. H.
, and
Kim
,
H. J.
,
2008
, “
Experimental Investigation of Wing-in-Ground Effect With a NACA6409 Section
,”
J. Mar. Sci. Technol.
,
13
(
4
), pp.
317
327
.10.1007/s00773-008-0015-4
7.
Lee
,
J.
,
Han
,
C. S.
, and
Bae
,
C. H.
,
2010
, “
Influence of Wing Configurations on Aerodynamic Characteristics of Wings in Ground Effect
,”
J. Aircr.
,
47
(
3
), pp.
1030
1040
.10.2514/1.46703
8.
Lu
,
A.
,
Tremblay-Dionne
,
V.
, and
Lee
,
T.
,
2019
, “
Experimental Study of Aerodynamics and Wingtip Vortex of a Rectangular Wing in Flat Ground Effect
,”
ASME J. Fluids Eng.
,
141
(
11
), p.
111108
.10.1115/1.4043593
9.
Wei
,
Y.
, and
Zhigang
,
Y.
,
2012
, “
Aerodynamic Investigation on Tiltable Endplate for WIG Craft
,”
Aircr. Eng. Aerosp. Technol.
,
84
(
1
), pp.
4
12
.10.1108/00022661211194933
10.
Nirooei
,
M.
,
2018
, “
Aerodynamic and Static Stability Characteristics of Airfoils in Extreme Ground Effect
,”
Proc. Inst. Mech. Eng., Part G: J. Aerosp. Eng.
,
232
(
6
), pp.
1134
1148
.10.1177/0954410017708212
11.
Qu
,
Q.
,
Wang
,
W.
,
Liu
,
P.
, and
Agarwal
,
R. K.
,
2015
, “
Airfoil Aerodynamics in Ground Effect for Wide Range of Angles of Attack
,”
AIAA J.
,
53
(
4
), pp.
1048
1061
.10.2514/1.J053366
12.
Yun
,
L.
,
Bliault
,
A.
, and
Doo
,
J.
,
2010
,
WIG Craft and Ekranoplan: Ground Effect Craft Technology
,
Springer
,
New York
.
13.
Park
,
K.
,
Hong
,
C. H.
,
Kim
,
K. S.
, and
Lee
,
J.
,
2008
, “
Effect of Endplate Shape on Performance and Stability of Wings-in-Ground (WIG) Craft
,”
World Acad. Sci., Eng. Technol.
,
2
(
11
), pp.
296
302
.10.5281/zenodo.1328792
14.
Flaig
,
J.
,
2019
, “
A Different Kettle of Fish: Is Airfish 8 Plane-Boat Hybrid a Marine Travel Game-Changer?
,” Institute of Mechanical Engineers, London, UK, accessed Feb. 2023, https://www.imeche.org/news/news-article/a-different-kettle-of-fish-is-airfish-8-plane-boat-hybrid-a-marine-travel-game-changer
15.
Bashir
,
M.
,
Lee
,
C. F.
, and
Rajendran
,
P.
,
2017
, “
Shape Memory Materials and Their Applications in Aircraft Morphing: An Introspective Study
,”
ARPN J. Eng. Appl. Sci.
,
12
(
19
), pp.
5434
5446
.https://www.arpnjournals.org/jeas/research_papers/rp_2017/jeas_1017_6371.pdf
16.
Alsaidi
,
B.
,
Joe
,
W. Y.
, and
Akbar
,
M.
,
2019
, “
Computational Analysis of 3D Lattice Structures for Skin in Real-Scale Camber Morphing Aircraft
,”
Aerospace
,
6
(
7
), p.
79
.10.3390/aerospace6070079
17.
Frommer
,
J.
, and
Crossley
,
W.
,
2005
, “
Enabling Continuous Optimization for Sizing Morphing Aircraft Concepts
,”
AIAA
Paper No. 2005-816.10.2514/6.2005-816
18.
Beaverstock
,
C. S.
,
Woods
,
B. K. S.
,
Fincham
,
J. H. S. M.
, and
Friswell
,
M. I.
,
2015
, “
Performance Comparison Between Optimised Camber and Span for a Morphing Wing
,”
Aerospace
,
2
(
3
), pp.
524
554
.10.3390/aerospace2030524
19.
Ajaj
,
R. M.
,
Friswell
,
M. I.
,
Saavedra Flores
,
E. I.
,
Little
,
O.
, and
Isikveren
,
A. T.
,
2012
, “
Span Morphing: A Conceptual Design Study
,”
AIAA
Paper No. 2012-1510.10.2514/6.2012-1510
20.
Yu
,
Y.
,
Liu
,
Y.
, and
Leng
,
J.
,
2009
, “
Design and Aerodynamic Characteristics of a Span Morphing Wing
,”
Proceedings Volume Industrial and Commercial Applications of Smart Structures Technologies
, San Diego, CA, Mar. 8–12. 10.1117/12.815675
21.
Jung
,
J. H.
,
Kim
,
M. J.
,
Yoon
,
H. S.
,
Hung
,
P. A.
,
Chun
,
H. H.
, and
Park
,
D. W.
,
2012
, “
Endplate Effect on Aerodynamic Characteristics of Three-Dimensional Wings in Close Free Surface Proximity
,”
Int. J. Nav. Archit. Ocean Eng.
,
4
(
4
), pp.
477
487
.10.2478/IJNAOE-2013-0112
22.
Macaraeg
,
M.
,
1998
, “
Fundamental Investigations of Airframe Noise
,”
AIAA
Paper No. 98-2224.10.2514/6.98-2224
23.
Jeong
,
J.
, and
Bae
,
J. S.
,
2022
, “
Wind Tunnel Flight Test of VCCS Morphing UAV
,”
2022 International Conference on Unmanned Aircraft Systems (
ICUAS
), Dubrovnik, Croatia, June 21–24, pp.
1424
1431
.10.1109/ICUAS54217.2022.9836192
24.
Woods
,
B. K. S.
, and
Friswell
,
M. I.
,
2012
, “
Preliminary Investigation of a Fishbone Active Camber Concept
,”
ASME
Paper No. SMASIS2012-8058.10.1115/SMASIS2012-8058
25.
Siemens Digital Industries Software
,
2019
, User Manual Star CCM+ 14.04.013, Siemens, Plano, TX, accessed Sept. 18,
2024
, https://community.sw.siemens.com/s/question/0D54O000075Nz8xSAC/how-do-i-cite-simcenter-starccm
26.
Coleman
,
H.
, and
Members
,
C.
,
2009
, “
Standard for Verification and Validation in Computational Fluid Dynamics and Heat Transfer (V&V20 Committee Chair and Principal Author)
,” University of Alabama, Huntsville, Standard No. ASME V&V
20
2009
.
27.
Ying
,
C.
,
Yang
,
W.
, and
Yang
,
Z.
,
2010
Ground Viscous Effect on Stall of Wing in Ground Effect
,” The Third International Conference on Modelling and Simulation (
ICMS2010
), Wuxi, P.R. China, June 4–6, pp.
230
233
.https://www.researchgate.net/publication/201131575_Ground_Viscous_Effect_on_Stall_of_Wing_in_Ground_Effect
28.
Mohamed
,
M.
, and
Amin
,
I.
,
2020
, “
Effect of Wing Geometrical Parameters on the Aerodynamic Performance of Wing in Ground Marine Craft
,” Proceedings of Third International Conference on Maritime Technology and Engineering (
MARTECH
), Lisbon, Portugal, July 4–6, pp.
347
352
.https://www.researchgate.net/publication/343016538_Effect_of_wing_geometrical_parameters_on_the_aerodynamic_performance_of_wing_in_ground_marine_craft
29.
Fink
,
M. P.
, and
Lastinger
,
J. L.
,
1986
, “
Aerodynamic Characteristics of Low-Aspect-Ratio Wings in Close Proximity to the Ground
,”
Biol. Cent.-Am.
,
2
, pp.
v
413
.
30.
Harvey
,
J. K.
, and
Perry
,
F.
,
1971
, “
Flowfield Produced by Trailing Vortices in the Vicinity of the Ground
,”
AIAA Journal
, 9(8), pp.
1659
1660
.10.2514/3.6415
31.
Abdessemed
,
C.
,
Bouferrouk
,
A.
, and
Yao
,
Y.
,
2022
, “
Effects of an Unsteady Morphing Wing With Seamless Side-Edge Transition on Aerodynamic Performance
,”
Energies
,
15
(
3
), p.
1093
.10.3390/en15031093
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