Results 41 to 50 of about 2,147 (222)

Distinct Turbulent Regions in the Wake of a Wind Turbine and Their Inflow-Dependent Locations: The Creation of a Wake Map

Energies, 2020
Wind turbines are usually clustered in wind farms which causes the downstream turbines to operate in the turbulent wakes of upstream turbines. As turbulence is directly related to increased fatigue loads, knowledge of the turbulence in the wake and its ...
Ingrid Neunaber, Michael Hölling, Richard J. A. M. Stevens, Gerard Schepers, Joachim Peinke   +4 more
doaj   +1 more source

Simulated wind farm wake sensitivity to configuration choices in the Weather Research and Forecasting model version 3.8.1 [PDF]

Geoscientific Model Development, 2020
Wakes from wind farms can extend over 50 km downwind in stably stratified conditions. These wakes can undermine power production at downwind turbines, adversely impacting revenue. As such, wind farm wake impacts must be considered in wind resource
J. M. Tomaszewski, J. K. Lundquist, J. K. Lundquist   +2 more
doaj   +1 more source

Wake properties and power output of very large wind farms for different meteorological conditions and turbine spacings: a large-eddy simulation case study for the German Bight [PDF]

Wind Energy Science, 2022
Germany's expansion target for offshore wind power capacity of 40 GW by the year 2040 can only be reached if large portions of the Exclusive Economic Zone in the German Bight are equipped with wind farms.
O. Maas, S. Raasch
doaj   +1 more source

MULTIFRACTAL ANALYSIS OF A WAKE FOR A SINGLE WIND TURBINE [PDF]

Topical Problems of Fluid Mechanics 2017, 2017
Wind energy is an important component of renewable energy sources. Studying of turbulent wakes for wind turbines and interactions with Atmospheric Boundary Layer is an urgent problem. The theory of chaos and fractal geometry with some research in fluid dynamics will change profoundly the scope of complex scale to scale transport in theory of turbulence,
Strijhak, Sergei, Redondo Apraiz, José Manuel, Tellez Alvarez, Jackson David   +2 more
openaire   +2 more sources

Large-Eddy Simulation of Wakes of Waked Wind Turbines

Energies, 2022
The wake dynamics of a wind turbine are influenced by the atmospheric turbulence and the wake of its upwind turbine. In this work, we investigate the wake characteristics of a waked wind turbine for four different downwind spacings and three different inflows using large-eddy simulation with a turbine parameterized using the actuator surface model. The
Xiaohao Liu, Zhaobin Li, Xiaolei Yang, Duo Xu, Seokkoo Kang, Ali Khosronejad   +5 more
openaire   +2 more sources

3-D shear-layer model for the simulation of multiple wind turbine wakes: description and first assessment [PDF]

Wind Energy Science, 2017
The number of turbines installed in offshore wind farms has strongly increased in the last years and at the same time the need for more precise estimations of the wind farm efficiency too.
D. Trabucchi, L. Vollmer, M. Kühn
doaj   +1 more source

A Review of Methodological Approaches for the Design and Optimization of Wind Farms [PDF]

, 2014
This article presents a review of the state of the art of the Wind Farm Design and Optimization (WFDO) problem. The WFDO problem refers to a set of advanced planning actions needed to extremize the performance of wind farms, which may be composed of a ...
Gunner Larsen, Réthoré, Pierre-Elouan, Gunner Chr. Larsen, Probst, Oliver, Oliver Probst, Krystel Castillo-Villar, Pierre-Elouan Réthoré, Herbert-Acero, José F., Larsen, Gunner Chr., Krystel K. Castillo-Villar, José F. Herbert-Acero, José Herbert-Acero, Castillo-Villar, Krystel K.   +12 more
core   +1 more source

Coalescing Wind Turbine Wakes

Journal of Physics: Conference Series, 2015
A team of researchers from the National Renewable Energy Laboratory and Statoil used large-eddy simulations to numerically investigate the merging wakes from upstream offshore wind turbines. Merging wakes are typical phenomena in wind farm flows in which neighboring turbine wakes consolidate to form complex flow patterns that are as yet not well ...
S Lee, M Churchfield, S Sirnivas, P Moriarty, F G Nielsen, B Skaare, E Byklum   +6 more
openaire   +1 more source

Wake steering of multirotor wind turbines [PDF]

Wind Energy, 2021
Abstract In this paper, wake steering is applied to multirotor turbines to determine whether it has the potential to reduce wind plant wake losses. Through application of rotor yaw to multirotor turbines, a new degree of freedom is introduced to wind farm control such that wakes can be expanded, channelled or redirected to improve ...
Gustav A. Speakman, Mahdi Abkar, Luis A. Martínez‐Tossas, Majid Bastankhah   +3 more
openaire   +6 more sources

Characterizing the Wake Effects on Wind Power Generator Operation by Data-Driven Techniques

Energies, 2023
Wakes between neighboring wind turbines are a significant source of energy loss in wind farm operations. Extensive research has been conducted to analyze and understand wind turbine wakes, ranging from aerodynamic descriptions to advanced control ...
Davide Astolfi, Fabrizio De Caro, Alfredo Vaccaro   +2 more
doaj   +1 more source