Results 41 to 50 of about 579 (191)

An Analytical Model for Wind Turbine Wakes under Pressure Gradient

Energies, 2022
In this study, we present an analytical modeling framework for wind turbine wakes under an arbitrary pressure gradient imposed by the base flow. The model is based on the conservation of the streamwise momentum and self-similarity of the wake velocity ...
Arslan Salim Dar, Fernando Porté-Agel
doaj   +1 more source

Analytical model for the power–yaw sensitivity of wind turbines operating in full wake [PDF]

Wind Energy Science, 2020
Wind turbines are designed to align themselves with the incoming wind direction. However, turbines often experience unintentional yaw misalignment, which can significantly reduce the power production.
J. Liew, A. M. Urbán, S. J. Andersen
doaj   +1 more source

Blade–wake interactions in cross-flow turbines [PDF]

International Journal of Marine Energy, 2015
This paper presents analytical bounds for blade–wake interaction phenomenona occurring in rotating cross-flow turbines for wind and tidal energy generation (e.g. H rotors, Darrieus or vertical axis). Limiting cases are derived for one bladed turbines and extended to the more common three bladed configuration.
Ferrer Vaccarezza, Esteban, H.J. Willden, Richard   +1 more
openaire   +2 more sources

Characterization of Wind Turbine Wakes with Nacelle-Mounted Doppler LiDARs and Model Validation in the Presence of Wind Veer

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, Fernando Carbajo Fuertes, Mohsen Vahidzadeh, Corey D. Markfort, Fernando Porté-Agel   +4 more
doaj   +1 more source

Integrated Design and Experimental Validation of a Fixed-Pitch Rotor for Wind Tunnel Testing

Energies, 2023
In this paper we report about the design and validation of a 1.2 m wind turbine rotor with fixed blade pitch. The wind turbine is a scaled version of the DTU 10 MW. Integrated design of dimensional scaling laws, blade aerodynamics, and turbine control is
Alessandro Fontanella, Giulia Da Pra, Marco Belloli   +2 more
doaj   +1 more source

A call for enhanced data-driven insights into wind energy flow physics

Theoretical and Applied Mechanics Letters
With the increased availability of experimental measurements aiming at probing wind resources and wind turbine operations, machine learning (ML) models are poised to advance our understanding of the physics underpinning the interaction between the ...
Coleman Moss, Romit Maulik, Giacomo Valerio Iungo   +2 more
doaj   +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

Region-Based Convolutional Neural Network for Wind Turbine Wake Characterization in Complex Terrain

Remote Sensing, 2021
We present a proof of concept of wind turbine wake identification and characterization using a region-based convolutional neural network (CNN) applied to lidar arc scan images taken at a wind farm in complex terrain.
Jeanie A. Aird, Eliot W. Quon, Rebecca J. Barthelmie, Mithu Debnath, Paula Doubrawa, Sara C. Pryor   +5 more
doaj   +1 more source

Scientific collaboration in data‐intensive research networks: PhD fellows' expectations and early experiences

Journal of the Association for Information Science and Technology, EarlyView.
Abstract Collaboration has become important at all stages of research careers. In data‐intensive research fields such as wind energy, many PhD fellows are socialized to such collaboration in networks that train a cohort of PhD fellows. Based on interviews with 23 PhD fellows in four wind‐energy training networks, we investigate their expectations and ...
Grischa Fraumann, Haakon Lund, Frans van der Sluis, Morten Hertzum   +3 more
wiley   +1 more source

Towards Identifying Contribution of Wake Turbulence to Inflow Noise from Wind Turbines

E3S Web of Conferences, 2015
Downstream turbines in a wind farm often operate under the influence of wakes from upstream turbines. Aerodynamic losses and aeromechanical issues (stochastic loads) associated with such wake-turbine interactions have been investigated before.
Agrawal Bharat Raj, Rosenberg Aaron, Sharma Anupam   +2 more
doaj   +1 more source