Shape memory alloy‐based centrifugal stiffening for response reduction of horizontal axis wind turbine blade

2020 ◽  
Author(s):  
Sourav Das ◽  
M. Mohamed Sajeer ◽  
Arunasis Chakraborty ◽  
Saptarshi Sarkar
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Turbine Blade ◽  
Horizontal Axis ◽  
Horizontal Axis Wind Turbine ◽  
Centrifugal Stiffening

Flutter Limit Investigation for a Horizontal Axis Wind Turbine Blade

2018 ◽  
Vol 140 (4) ◽  
Author(s):  
Mennatullah M. Abdel Hafeez ◽  
Ayman A. El-Badawy
Keyword(s):  
Dynamic Response ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Nonlinear Partial Differential Equations ◽  
Stability Limit ◽  
Wind Turbine Blade ◽  
Horizontal Axis ◽  
Horizontal Axis Wind Turbine ◽  
Centrifugal Stiffening ◽  
Aeroelastic Model

This work presents a new aeroelastic model that governs the extensional, chordwise, flapwise, and torsional vibrations of an isolated horizontal axis wind turbine blade. The model accounts for the sectional offsets between the shear, aerodynamic, and mass centers. The centrifugal stiffening effects are also accounted for by including nonlinear strains based on an ordering scheme that retains terms up to second-order. Aerodynamic loading is derived based on a modified Theodorsen's theory adapted to account for the blade rotational motion. A set of four coupled nonlinear partial differential equations are derived using the Hamiltonian approach that are then linearized about the steady-state extensional position. The finite element method (FEM) is then employed to spatially discretize the resulting equations with the aim of obtaining an approximate solution to the blade's dynamic response, utilizing state space techniques and complex modal analysis. Investigation of the blade's flutter stability limit is carried out. Effects of parameters such as wind speed and blade sectional offsets on the flutter limit and dynamic response are also investigated.

scholarly journals Unsteady Flow and Vibration Analysis of the Horizontal-Axis Wind Turbine Blade under the Fluid-Structure Interaction

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Rui Zhu ◽  
Da-duo Chen ◽  
Shi-wei Wu
Keyword(s):  
Unsteady Flow ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Turbine Blade ◽  
Horizontal Axis ◽  
Leeward Side ◽  
Horizontal Axis Wind Turbine ◽  
Fluid Structure ◽  
Fluid Field ◽  
Stress Fluctuation

A 1.5 MW horizontal-axis wind turbine blade and fluid field model are established to study the difference in the unsteady flow field and structural vibration of the wind turbine blade under one- and two-way fluid-structure interactions. The governing equations in fluid field and the motion equations in structural were developed, and the corresponding equations were discretized with the Galerkin method. Based on ANSYS CFX fluid dynamics and mechanical structural dynamics calculation software, the effects of couplings on the aerodynamic and vibration characteristics of the blade are compared and analyzed in detail. Results show that pressure distributions at different sections of the blade are concentrated near the leading edge, and the leeward side of two-way coupling is slightly higher than that of one-way coupling. Deformation along the blade span shows a nonlinear change under the coupling effect. The degree of amplitude attenuation in two-way coupling is significantly greater than that in one-way coupling because of the existence of aerodynamic damping. However, the final amplitude is still higher than the one-way coupling. The Mises stress fluctuation in the windward and leeward sides is more obvious than one-way coupling, and the discrepancy must not be ignored.

Review of aerodynamic developments on small horizontal axis wind turbine blade

2015 ◽  
Vol 42 ◽  
pp. 801-822 ◽  
Author(s):  
N. Karthikeyan ◽  
K. Kalidasa Murugavel ◽  
S. Arun Kumar ◽  
S. Rajakumar
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Turbine Blade ◽  
Horizontal Axis ◽  
Horizontal Axis Wind Turbine

OS2-4 Studies on unsteady characteristic of field horizontal-axis wind turbine blade

2006 ◽  
Vol 2006.11 (0) ◽  
pp. 47-48
Author(s):  
Takao MAEDA ◽  
Yasunari KAMADA ◽  
Yuu OUCHI ◽  
Kei TANAKA ◽  
Keita NAITO
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Turbine Blade ◽  
Horizontal Axis ◽  
Horizontal Axis Wind Turbine

Stacking sequence optimization of horizontal axis wind turbine blade using FEA, ANN and GA

2015 ◽  
Vol 52 (4) ◽  
pp. 791-801 ◽  
Author(s):  
P. Emmanuel Nicholas ◽  
K. P. Padmanaban ◽  
D. Vasudevan ◽  
T. Ramachandran
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Turbine Blade ◽  
Horizontal Axis ◽  
Stacking Sequence ◽  
Horizontal Axis Wind Turbine ◽  
Sequence Optimization ◽  
Stacking Sequence Optimization

scholarly journals Horizontal Axis Wind Turbine Blade Design Methodologies for Efficiency Enhancement—A Review

Energies ◽  
2018 ◽  
Vol 11 (3) ◽  
pp. 506 ◽  
Author(s):  
Shafiqur Rehman ◽  
Md. Alam ◽  
Luai Alhems ◽  
M. Rafique
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Turbine Blade ◽  
Horizontal Axis ◽  
Blade Design ◽  
Efficiency Enhancement ◽  
Horizontal Axis Wind Turbine ◽  
Design Methodologies ◽  
Turbine Blade Design
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