Darrieus type vertical axis wind turbines (VAWT) are being used commercially nowadays; however, they still need to improve in terms of performance as they work in an urban environment where the wind speeds are low and the gusts are frequent. The aerodynamic performance of Darrieus turbine is highly affected by the wingtip vortices. This paper attempts at analyzing and comparing the performance of Darrieus with the use of various wingtip devices. Attempts have also been made to find out optimal working parameters by studying the flow through turbines with different tip speed ratios and different inlet wind speeds. A comparative computational fluid dynamics (CFD) simulation was performed on a small-scale, straight-bladed Darrieus rotor vertical axis wind turbine, with a large stationary domain and a small rotating subdomain using sliding mesh technique. Comparison of the performance of end tip device that can be used against a baseline rotor configuration is done, with the aim of identifying the best tip architecture. The main focus lies on building an experimental setup to validate the results obtained with the CFD simulation and to compare the performance with and without wingtip device. VAWTs with wingtip device show very promising results compared to the baseline model.

References

References
1.
Gupta
,
A. K.
,
2015
, “
Efficient Wind Energy Conversion: Evolution to Modern Design
,”
ASME J. Energy Resour. Technol.
,
137
(
5
), p.
051201
.
2.
Ryoichi
,
A. S.
,
2017
, “
Review of Wind Turbine Research in 21st Century
,”
ASME J. Energy Resour. Technol.
,
139
(
5
), p.
050801
.
3.
Alom
,
N.
, and
Saha
,
U. K.
,
2018
, “
Four Decades of Research Into the Augmentation Techniques of Savonius Wind Turbine Rotor
,”
ASME J. Energy Resour. Technol.
,
140
(
5
), p.
050801
.
4.
Islam
,
M.
,
Fartaj
,
A.
, and
Carriveau
,
R.
,
2008
, “
Analysis of the Design Parameters Related to a Fixed-Pitch Straight-Bladed Vertical Axis Wind Turbine
,”
Wind Eng.
,
32
(
5
), pp.
491
507
.
5.
Amato, F.
,
Bedon, G.
,
Castelli, M. R.
, and
Benini, E.
,
2013
, “
Numerical Analysis of the Influence of Tip Devices on the Power Coefficient of a VAWT
,”
Int. J. Mech., Aerosp., Ind., Mechatronic Manuf. Eng.
,
7
(6), pp. 1053–1060.https://waset.org/publications/8087/numerical-analysis-of-the-influence-of-tip-devices-on-the-power-coefficient-of-a-vawt
6.
Battisti
,
L. L.
,
Zanne
,
L. L.
,
Dell'Anna
,
S. S.
,
Dossena
,
V. V.
,
Persico
,
G. G.
, and
Paradiso
,
B. B.
,
2011
, “
Aerodynamic Measurements on a Vertical Axis Wind Turbine in a Large Scale Wind Tunnel
,”
ASME J. Energy Resour. Technol.
,
133
(
3
), p.
031201
.
7.
Ahmed
,
N. A.
, and
Netto
,
K. J.
,
2014
, “
Computer Aided Design and Manufacture of a Novel Vertical Axis Wind Turbine Rotor With Winglet
,”
Appl. Mech. Mater.
,
607
, pp. 581–587.
8.
Persico
,
G.
,
Dossena
,
V.
,
Paradiso
,
B.
,
Battisti
,
L.
,
Brighenti
,
A.
, and
Benini
,
E.
,
2017
, “
Time-Resolved Experimental Characterization of the Wakes Shed by H-Shaped and Troposkien Vertical Axis Wind Turbines
,”
ASME J. Energy Resour. Technol.
,
139
(
3
), p.
031203
.
9.
Gavrilović
,
N. N.
,
Rašuo
,
B. P.
,
Dulikravich
,
G. S.
, and
Parezanović
,
V.
,
2015
, “
Commercial Aircraft Performance Improvement Using Winglets
,”
FME Trans.
,
43
(1). pp. 1–8.http://www.mas.bg.ac.rs/_media/istrazivanje/fme/vol43/1/1_ngavrilovic.pdf
10.
Roh
,
S.-C.
, and
Kang
,
S.-H.
,
2013
, “
Effects of a Blade Profile, the Reynolds Number, and the Solidity on the Performance of a Straight Blade Vertical Axis Wind Turbine
,”
J. Mech. Sci. Technol.
,
27
(
11
), pp.
3299
3307
.
11.
McLaren
,
K.
,
Tullis
,
S.
, and
Ziada
,
S.
,
2011
, “
Computational Fluid Dynamics Simulation of the Aerodynamics of a High Solidity, Small Scale Vertical Axis Wind Turbine
,”
Wind Energy
,
15
(
3
), pp.
349
361
.
12.
Dossena
,
V.
,
Persico
,
G.
,
Paradiso
,
B.
,
Battisti
,
L.
,
Dell'Anna
,
S.
,
Brighenti
,
A.
, and
Benini
,
E.
,
2015
, “
An Experimental Study of the Aerodynamics and Performance of a Vertical Axis Wind Turbine in a Confined and Unconfined Environment
,”
ASME J. Energy Resour. Technol.
,
137
(
5
), p.
051207
.
13.
Gosselin
,
R.
,
Dumas
,
G.
, and
Boudreau
,
M.
,
2013
, “
Parametric Study of H-Darrieus Vertical-Axis Turbines Using uRANS Simulations
,”
21st Annual Conference of the CFD Society of Canada
, Sherbrooke, Canada, May 6–9, Paper No.
CFDSC-2013 #178
.http://www.lmfn.ulaval.ca/fileadmin/lmfn/documents/Articles/GosselinDumasBoudreau-CFD2013_reprint.pdf
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