Results 11 to 20 of about 3,387,018 (354)

Assessment of a rotor blade extension retrofit as a supplement to the lifetime extension of wind turbines [PDF]

open access: yesWind Energy Science, 2020
The potential lifetime of wind turbine components is usually not fully utilized as the site conditions are less severe than assumed in the turbine design.
M. Rosemeier, M. Saathoff
doaj   +1 more source

Parked and operating load analysis in the aerodynamic design of multi-megawatt-scale floating vertical-axis wind turbines [PDF]

open access: yesWind Energy Science, 2022
A good understanding of aerodynamic loading is essential in the design of vertical-axis wind turbines (VAWTs) to properly capture design loads and to estimate the power production.
M. S. Sakib, D. T. Griffith
doaj   +1 more source

Power Production and Blade Fatigue of a Wind Turbine Array Subjected to Active Yaw Control

open access: yesEnergies, 2023
This study investigated the power production and blade fatigue of a three-turbine array subjected to active yaw control (AYC) in full-wake and partial-wake configurations.
Mou Lin, Fernando Porté-Agel
doaj   +1 more source

A novel approach to structural load control using intelligent actuators [PDF]

open access: yes, 2009
The recent trend towards large multi-MW wind turbines resulted in the role of the control system becoming increasingly important. The extension of the role of the controller to alleviate structural loads has motivated the exploration of novel control ...
Dominguez, S.   +4 more
core   +1 more source

Performance of a hydrokinetic turbine using a theoretical approach

open access: yesEnergy Reports, 2020
Regarding the interest in renewable energies, several sources of energy production have been studied and still under improvement. In this work, we are interested in harnessing marine energy currents exploiting the hydrokinetic turbines.
S. Hazim   +3 more
doaj   +1 more source

Wind Turbine Blade Design

open access: yesEnergies, 2012
A detailed review of the current state-of-art for wind turbine blade design is presented, including theoretical maximum efficiency, propulsion, practical efficiency, HAWT blade design, and blade loads.
Richard J. Crossley, Peter J. Schubel
doaj   +1 more source

System-level design studies for large rotors [PDF]

open access: yesWind Energy Science, 2019
We examine the effect of rotor design choices on the power capture and structural loading of each major wind turbine component. A harmonic model for structural loading is derived from simulations using the National Renewable Energy Laboratory (NREL ...
D. S. Zalkind   +10 more
doaj   +1 more source

On the wind turbine blade loads from an aeroelastic simulation and their transfer to a three-dimensional finite element model of the blade

open access: yesWind Engineering : The International Journal of Wind Power, 2019
This article first presents a description of the different load types to which a wind turbine blade is subjected. Analytical equations are derived to express blade loads from operation parameters of the wind turbine (rotor and nacelle velocities and ...
L-C. Forcier, S. Joncas
semanticscholar   +1 more source

Identification of Flap Motion Parameters for Vibration Reduction in Helicopter Rotors with Multiple Active Trailing Edge Flaps

open access: yesShock and Vibration, 2011
An active control method utilizing the multiple trailing edge flap configuration for rotorcraft vibration suppression and blade loads control is presented.
Uğbreve;ur Dalli   +1 more
doaj   +1 more source

Reducing Helicopter Vibration Loads by Individual Blade Control with Genetic Algorithm

open access: yesMachines, 2022
A rotor that can realize individual blade pitch control was designed. This paper focuses on finding the trend of helicopter vibration loads after applying multiple high-order harmonic control.
Renguo Yang   +3 more
doaj   +1 more source

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