scholarly journals Some modelling improvements for prediction of wind turbine rotor loads in turbulent wind

Wind Energy ◽  
2021 ◽  
Author(s):  
Arturo Muñoz‐Simón ◽  
Rafael Palacios ◽  
Andrew Wynn
Keyword(s):  
Wind Turbine ◽  
Turbine Rotor ◽  
Turbulent Wind ◽  
Wind Turbine Rotor

Active Control of Wind Turbine Rotor Torsional Vibration

2013 ◽  
Author(s):  
Warren N. White ◽  
Zhichao Yu ◽  
Ruth Douglas Miller ◽  
David Ochs
Keyword(s):  
Wind Turbine ◽  
Active Control ◽  
Vibration Isolation ◽  
Synchronous Generator ◽  
Turbine Rotor ◽  
Time Varying ◽  
National Renewable Energy Laboratory ◽  
Permanent Magnet Synchronous Generator ◽  
Turbulent Wind ◽  
Wind Turbine Rotor

Transient and harmonic stresses in wind turbine rotor shafts contribute to gearbox failure. This paper investigates the reduction of rotor shaft torsional vibrations through active control of the generator torque. A 5 MW turbine model is used to test the procedure. A model of a permanent magnet synchronous generator is included as part of the wind turbine simulation. The simulations are carried out using the software FAST from the National Renewable Energy Laboratory (NREL). The PI and feedback linearized controller for the generator is derived together with the means for vibration isolation. Examples of steady, time varying, and turbulent wind are presented which all show significant reduction in the torsional oscillations.

Harmonization of new wind turbine rotor blades development process: A review

2014 ◽  
Vol 39 ◽  
pp. 874-882 ◽  
Author(s):  
B. Rašuo ◽  
M. Dinulović ◽  
A. Veg ◽  
A. Grbović ◽  
A. Bengin
Keyword(s):  
Wind Turbine ◽  
Development Process ◽  
Turbine Rotor ◽  
Rotor Blades ◽  
Wind Turbine Rotor

Big challenges: the role of resin in wind turbine rotor blade development

2010 ◽  
Vol 54 (1) ◽  
pp. 36-39 ◽  
Author(s):  
Paul Langemeier ◽  
Christoph Scheuer
Keyword(s):  
Wind Turbine ◽  
Rotor Blade ◽  
Turbine Rotor ◽  
Turbine Rotor Blade ◽  
Wind Turbine Rotor

scholarly journals Numerical Analysis of Wind Shear Effects on Horizontal Axis Wind Turbine Rotor Performance.

2002 ◽  
Vol 68 (674) ◽  
pp. 2795-2802
Author(s):  
Yutaka HASEGAWA ◽  
Koji KIKUYAMA ◽  
Kai KARIKOMI ◽  
Chihiro KATO
Keyword(s):  
Numerical Analysis ◽  
Wind Turbine ◽  
Wind Shear ◽  
Turbine Rotor ◽  
Horizontal Axis ◽  
Horizontal Axis Wind Turbine ◽  
Shear Effects ◽  
Wind Turbine Rotor

Design and analysis of a segmented blade for a 50 MW wind turbine rotor

2022 ◽  
pp. 0309524X2110693
Author(s):  
Alejandra S Escalera Mendoza ◽  
Shulong Yao ◽  
Mayank Chetan ◽  
Daniel Todd Griffith
Keyword(s):  
Wind Turbine ◽  
Large Mass ◽  
Turbine Rotor ◽  
Bolted Joints ◽  
Bonded Joints ◽  
Sheer Size ◽  
Extreme Scale ◽  
The Impact ◽  
Adhesive Materials ◽  
Wind Turbine Rotor

Extreme-size wind turbines face logistical challenges due to their sheer size. A solution, segmentation, is examined for an extreme-scale 50 MW wind turbine with 250 m blades using a systematic approach. Segmentation poses challenges regarding minimizing joint mass, transferring loads between segments and logistics. We investigate the feasibility of segmenting a 250 m blade by developing design methods and analyzing the impact of segmentation on the blade mass and blade frequencies. This investigation considers various variables such as joint types (bolted and bonded), adhesive materials, joint locations, number of joints and taper ratios (ply dropping). Segmentation increases blade mass by 4.1%–62% with bolted joints and by 0.4%–3.6% with bonded joints for taper ratios up to 1:10. Cases with large mass growth significantly reduce blade frequencies potentially challenging the control design. We show that segmentation of an extreme-scale blade is possible but mass reduction is necessary to improve its feasibility.

Predictive model of wind turbine rotor-blade deflection

2021 ◽  
Author(s):  
Carlos Armenta-Déu ◽  
Antoine Renoud-Grappin
Keyword(s):  
Wind Turbine ◽  
Predictive Model ◽  
Rotor Blade ◽  
Turbine Rotor ◽  
Turbine Rotor Blade ◽  
Wind Turbine Rotor

Development of a Scaled Rotor Blade for Tank Tests of Floating Wind Turbine Systems

2018 ◽  
Author(s):  
Paul Schünemann ◽  
Timo Zwisele ◽  
Frank Adam ◽  
Uwe Ritschel
Keyword(s):  
Wind Turbine ◽  
Rotor Blade ◽  
Turbine Rotor ◽  
Full Scale ◽  
Power Coefficient ◽  
Speed Ratio ◽  
Model Scale ◽  
Floating Wind Turbine ◽  
Hydrodynamic Effects ◽  
Wind Turbine Rotor

Floating wind turbine systems will play an important role for a sustainable energy supply in the future. The dynamic behavior of such systems is governed by strong couplings of aerodynamic, structural mechanic and hydrodynamic effects. To examine these effects scaled tank tests are an inevitable part of the design process of floating wind turbine systems. Normally Froude scaling is used in tank tests. However, using Froude scaling also for the wind turbine rotor will lead to wrong aerodynamic loads compared to the full-scale turbine. Therefore the paper provides a detailed description of designing a modified scaled rotor blade mitigating this problem. Thereby a focus is set on preserving the tip speed ratio of the full scale turbine, keeping the thrust force behavior of the full scale rotor also in model scale and additionally maintaining the power coefficient between full scale and model scale. This is achieved by completely redesigning the original blade using a different airfoil. All steps of this redesign process are explained using the example of the generic DOWEC 6MW wind turbine. Calculations of aerodynamic coefficients are done with the software tools XFoil and AirfoilPrep and the resulting thrust and power coefficients are obtained by running several simulations with the software AeroDyn.

Monitoring system of wind turbine rotor blades

2009 ◽  
Author(s):  
B. Frankenstein ◽  
L. Schubert ◽  
N. Meyendorf ◽  
H. Friedmann ◽  
C. Ebert
Keyword(s):  
Wind Turbine ◽  
Monitoring System ◽  
Turbine Rotor ◽  
Rotor Blades ◽  
Wind Turbine Rotor
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