Results 111 to 120 of about 31,556 (230)
Remote Sensing, 2019 Accurate prediction of wind turbine wakes is important for more efficient design and operation of wind parks. Volumetric wake measurements of nacelle-mounted Doppler lidars are used to characterize the wake of a full-scale wind turbine and to validate an
Peter Brugger +4 more
doaj +1 more source
Theoretical Modeling of Vertical-Axis Wind Turbine Wakes [PDF]
Energies, 2018 In this work, two different theoretical models for predicting the wind velocity downwind of an H-rotor vertical-axis wind turbine are presented. The first model uses mass conservation together with the momentum theory and assumes a top-hat distribution for the wind velocity deficit.
openaire +2 more sources
Segmented Gurney Flaps for Improved Wind Turbine Wake Recovery
Wind EnergyWhen 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 +4 more
doaj +1 more source
Determination of wind turbine far wake using actuator disk [PDF]
, 2014 The growth in size of wind turbines over the last years is significant. The rotor diameter becomes somehow comparable to atmospheric boundary layer at the land surface. In this case the assumption of uniform velocity of upcoming wind cannot be valid. The
AMER, Rodeyna +2 more
core +3 more sources
Numerical simulations of wind turbine wakes
, 2018 In recent years, the size and capacity of wind farms have increased significantly, as larger turbines are being clustered together to take advantage of the available wind resource. In large-scale wind farms, the downstream wind turbines will inevitably operate within the wake of the upstream ones. This leads to an apparent reduction of the power output
openaire +3 more sources
Wind EnergyWind 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 +3 more
doaj +1 more source
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. +4 more
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Applied Sciences, 2018 Optimal design of wind turbine placement in a wind farm is one of the most effective tools to reduce wake power losses by alleviating the wake effect in the wind farm.
Longyan Wang, Yunkai Zhou, Jian Xu
doaj +1 more source
Neighborhood effects in wind farm performance: An econometric approach
, 2016 The optimization of turbine density in wind farms entails a trade-off between the usage of scarce, expensive land and power losses through turbine wake effects.
Odening, Martin +2 more
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Wake measurements of a multi-MW wind turbine with long range lidar [PDF]
, 2009 The 2-µm pulsed Doppler lidar of the DLR (Deutsches Zentrum für Luft- und Raumfahrt) was used to carry out wake measurements of a 5 MW wind turbine of the type Multibrid M5000.
Käsler, Yvonne +3 more
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