Applying video magnification for vision-based operating deflection shape evaluation on a wind turbine blade cross-section

2018 ◽  
Author(s):  
Zhu Mao ◽  
Aral Sarrafi ◽  
Christopher Niezrecki ◽  
Peyman Poozesh
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Cross Section ◽  
Wind Turbine Blade

The Study of the Aerodynamic Force of Wind Turbine Blade by Using FLUENT and MATLAB

2011 ◽  
Vol 225-226 ◽  
pp. 794-797
Author(s):  
He Huang ◽  
Sheng Jun Wu ◽  
Zhuo Qiu Li ◽  
Jin Fan Fei
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Cross Section ◽  
Large Scale ◽  
Aerodynamic Force ◽  
Wind Turbine Blade ◽  
Wind Pressure ◽  
Solid Model ◽  
Blade Surface ◽  
Analytical Work

In this paper, large scale wind turbine blade has been taken for example and two harmful conditions have been chosen as the study targets. Taking a 25 m long wind turbine blade, its solid model is built in CAE. Then take advantage of Computational Fluid Dynamics software-FLUENT to analyze and simulate wind pressure of blade surface acted by aerodynamic force. By means of the numerical method to make curve fitting to bring wind pressure to bear on each cross section of blade accurately, and import it into ANSYS to do further analytical work. It shows that the work should be the firm foundation for further analysis of the wind turbine blade.

Analysis of Wind Turbine Blade Motion: Linear Formulation Including All Aeroelastic Load Couplings

2012 ◽  
Author(s):  
Fouad Mohammad ◽  
Emmanuel Ayorinde
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Cross Section ◽  
Equations Of Motion ◽  
Wind Turbine Blade ◽  
Lagrange Equations ◽  
Horizontal Axis Wind Turbine ◽  
External Work ◽  
Flow Angle ◽  
Pitch Moment

A wind turbine blade similar to a helicopter rotor blade has the structure of a pretwisted beam of a variable airfoil asymmetrical cross-section. A number of approximate theories have been developed by different researchers to study the dynamic behavior of the blade of a horizontal axis wind turbine. Some researchers include warping, but they do not include the blade’s pretwisting. Others include the axial and torsional loadings and the coupling among these loadings but they ignore the bending loading. The new contribution in this study is the consideration of all the extensional, torsional and flexural loadings with their couplings, variable airfoil cross sections with warping effects, shear deflection, rotary inertia and with or without blade’s pretwist to obtain a more accurate dynamic model. To the best knowledge of the authors the simultaneous inclusion of all these factors has not been done before. The aerodynamic loadings (lift, drag and pitch moment) were calculated at each time step for a 14m blade that has a linear decreasing NACA4415 airfoil cross section utilizing a time dependent set of parameters such as angle of attack, material and air density, wind and blade speed, flow angle, yaw, pitch angles. Assuming that deformation is small, the total strain energy and total kinetic energy and external work due to the aerodynamic loading acting on the blade were calculated and used in the Lagrange equations of motion where we obtained the stiffness, mass and damping matrices of the linear dynamic equations of motion. Then the unknown displacements and rotations u, v and w in the directions of x, y and z axes respectively, the bending rotations θ1, θ2 about the y and z axes respectively and the torsional rotation ϕ about the x axis, were solved using the Newmark implicit iteration scheme.

Noise analysis of the wind turbine blade

2013 ◽  
Author(s):  
Gwochung Tsai ◽  
Yita Wang ◽  
Yuhchung Hu ◽  
Jaching Jiang
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Noise Analysis ◽  
Wind Turbine Blade

DYNAMIC ANALYSIS OF THE FLUID FLOW OVER A WIND TURBINE BLADE

2017 ◽  
Author(s):  
Aldemir Ap Cavalini Jr ◽  
João Marcelo Vedovoto ◽  
Renata Rocha
Keyword(s):  
Fluid Flow ◽  
Dynamic Analysis ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Turbine Blade
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