Results 121 to 130 of about 6,676 (235)

Numerical Computations of Wind Turbine Wakes

, 2007
Numerical simulations of the Navier-Stokes equations are performed to achieve a better understanding of the behaviour of wakes generated by wind turbines.
Stefan Ivanell, Jens N. Sørensen, Dan Henningson   +2 more
openaire   +2 more sources

The wake structure of a wind turbine - comparison between PIV measurements and free-wake calculations

, 1996
Rotor aerodynamic prediction codes remain inaccurate, as many of the features of the wake flow are not yet fully understood, or are simply unknown. In the present work, this problem has been addressed by comparing the results of a sophisticated free-wake
Anderson, C.G., Wagner, S., Bareib, R., Whale, J.   +3 more
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CFD modelling of wind turbine airfoil aerodynamics [PDF]

, 2008
This paper reports the first findings of an ongoing research programme on wind turbine computational aerodynamics at the University of Glasgow. Several modeling aspects of wind turbine airfoil aerodynamics based on the solution of the Reynoldsaveraged ...
Bonfiglioli, A., Foerster, M., Fraysse, F., Zanon, A., Campobasso, M.S.   +4 more
core  

Segmented Gurney Flaps for Improved Wind Turbine Wake Recovery

Wind Energy
When wind passes through the rotor of a wind turbine, the velocity is decreased while turbulence is increased. The region of decreased wind speed behind the rotor is known as the wind turbine wake and is bounded by a complex structure of helical vortices.
Nirav Dangi, Koen Boorsma, Edwin Bot, Wim Bierbooms, Wei Yu   +4 more
doaj   +1 more source

Aerofoil behaviour at high angles of attack and at Reynolds numbers appropriate for small wind turbines [PDF]

, 2014
The aerodynamic characteristics of a NACA0018 aerofoil have been investigated experimentally for incidence angles ranging from 0° to 180° in closed-jet and open-jet wind tunnels with different blockage coefficients at Reynolds numbers from 60,000 to 140 ...
Dominy, Robert G, Du, Longhuan, Berson, Arganthaël, Dominy, Robert   +3 more
core   +1 more source

Maximizing wind farm power output with the helix approach: Experimental validation and wake analysis using tomographic particle image velocimetry

Wind Energy
Wind farm control can play a key role in reducing the negative impact of wakes on wind turbine power production. The helix approach is a recent innovation in the field of wind farm control, which employs individual blade pitch control to induce a helical
Daan van derHoek, Bert Van denAbbeele, Carlos Simao Ferreira, Jan‐Willem vanWingerden   +3 more
doaj   +1 more source

Prediction of unsteady blade loads of a wind turbine using RANS and vorticity transport methodologies

, 2010
Numerical simulations of the NREL phase VI wind turbine operating in yawed conditions have been performed using two computational methods; one based on the solution of the Reynolds-averaged Navier-Stokes equations (RANS) using unstructured overset meshes
Fletcher, Timothy M., Kim, Da Hye., Scheurich, Frank, Kwon, Oh Joon, Brown, Richard, Yu, Dong Oh   +5 more
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Unsteady wake modelling for tidal current turbines

, 2011
The authors present a numerical model for three-dimensional unsteady wake calculations for tidal turbines. Since wakes are characterised by the shedding of a vortex sheet from the rotor blades, the model is based on the vorticity transport equations.
C. Johnstone, Mccombes, Tom, Grant, Andrew, T. McCombes, A. Grant, Johnstone, Cameron   +5 more
core   +1 more source

Wind Tunnel Evaluation of Aerodynamic Loads in FAST.Farm Under Controlled Wake Conditions

Wind Energy
This study investigates the capability of FAST.Farm, a mid‐fidelity wind farm simulation tool employing the dynamic wake meandering approach, to accurately predict loads on wind turbines in a small wind farm.
Alessandro Fontanella, Mohammad Youssef Mahfouz, Marco De Pascali, Po Wen Cheng, Marco Belloli   +4 more
doaj   +1 more source

Vertical-axis wind turbines in oblique flow: sensitivity to rotor geometry

, 2011
Increasing interest is being shown worldwide in the application of vertical-axis wind turbines for decentralised electricity generation within cities.
Scheurich, Frank, Brown, Richard
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