The results of experimental research on the wake and induced flow around a vertical axis wind turbine (VAWT) in skew are presented. The previous research on VAWTs in skew is limited because this operation mode has only recently been found to be significant in the operation of VAWTs in the built environment. These results contain hotwire measurements of the incoming flow and wake of a VAWT in nonskewed and skewed flow. The high sampling rate of the hotwire data allows the effects of blade passing to be identified. Flow visualization of the tip vortices is also presented. Thrust measurements of the rotor were performed to understand the effect of skew on thrust variation and to compare with analytical predictions.

Issue Section:
Research Papers
Keywords:
wind tunnels, flow visualisation, wakes, rotors, blades
Topics:
Blades, Flow (Dynamics), Rotors, Wake turbulence, Wakes, Thrust, Flow visualization, Vertical axis wind turbines, Wind tunnels, Rotation
1.
Mertens
,
S.
,
van Kuik
,
G.
, and
van Bussel
,
G.
, 2003, “
Performance of a H-Darrieus in the Skewed Flow on a Roof
,”
Sol. Energy
0038-092X,
125
, pp.
433
–
440
.
Crossref
Search ADS
 
2.
Ferreira
,
C.
,
van Kuik
,
G.
, and
van Bussel
,
G.
, 2006, “
An Analytical Method to Predict the Variation in Performance of an H-Darrieus in Skewed Flow and its Experimental Validation
,”
Proceedings of the European Wind Energy Conference 2006
,
Athens
.
3.
Timmer
,
W.
,
Vermeer
,
L.
, and
van Veen
,
J.
, 2002, “
Wind Tunnel Measurements on a One-Bladed Rotor in the Framework of the Stabtool Project
,” Tech. Report, TUDelft - DUWIND.
4.
Toet
,
S.
, and
Vermeer
,
N.
, 1991, “
Modificaties Blaaspijp Instituut voor Windenergie en Beschrijving Huidige Situatie
,” Tech. Report IW-91049M, TU Delft, Faculteit der Civiele Techniek, Institut voor Windenergie, The Netherlands.
5.
Haans
,
W.
,
Sant
,
T.
,
van Kuik
,
G.
, and
van Bussel
,
G.
, 2005, “
Measurement and Modelling of Tip Vortex Paths in the Wake of a HAWT Under Yawed Flow Conditions
,” AIAA-2005-0590.
6.
Haans
,
W.
,
Sant
,
T.
,
van Kuik
,
G.
, and
van Bussel
,
G.
, 2005, “
Measurement of Tip Vortex Paths in the Wake of a HAWT Under Yawed Flow Conditions
,”
ASME J. Sol. Energy Eng.
0199-6231,
127
(
4
), pp.
456
–
463
.
Crossref
Search ADS
 
7.
Michos
,
A.
,
Bergeles
,
G.
, and
Athanassiadis
,
N.
, 1984, “
Hot-Wire Measurements in the Wake of a Darrieus Rotor
,”
Proceedings European Wind Energy Conference 1984
.
8.
Haans
,
W.
,
Sant
,
T.
,
van Kuik
,
G.
, and
van Bussel
,
G.
, 2005, “
Velocity Measurements in the Near Wake of a Horizontal Axis Wind Turbine
,”
Proceedings of the 31st European Rotorcraft Forum, Florence, Italy
.
Copyright © 2006
 by American Society of Mechanical Engineers
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