Structural Design and Experimental Investigation of A Medium Scale Composite Wind Turbine Blade Considering Fatigue Life

2002 ◽  
Vol 10 (1) ◽  
pp. 1-10
Author(s):  
C. Kong, ◽  
Y. Sugiyama, ◽  
C. Soutis,
Keyword(s):  
Experimental Investigation ◽  
Fatigue Life ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Structural Design ◽  
Wind Turbine Blade ◽  
Medium Scale

A Study on Aerodynamic and Structural Design of High Efficiency Composite Blade of 1 MW Class HAWTS Considering Fatigue Life

2013 ◽  
Author(s):  
Changduk Kong ◽  
Minwoong Kim ◽  
Gilsu Park
Keyword(s):  
Fatigue Life ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Structural Design ◽  
High Efficiency ◽  
Design Procedure ◽  
Wind Turbine Blade ◽  
Structural Safety ◽  
Horizontal Axis Wind Turbine ◽  
Composite Blade

In this work, 1 MW class horizontal axis wind turbine blade configuration is properly sized and analyzed using the newly proposed aerodynamic design procedure and the in-house code developed by authors, and its design results are verified through comparison with experimental results of the previously developed wind turbine blade. The wind turbine structural design is carried out using the Glass/Epoxy composite materials and the simplified deign methods by the netting rule and the rule of mixture. The structural safety of the designed blade structure is investigated through the various load case studies, and stress, deformation, buckling and vibration analyses using a commercial FEM code, MSC.NASTRAN. Finally the required 20 years fatigue life is confirmed using the modified Spera’s empirical formulae.

Experimental investigation of the effect of active flow control on the wake of a wind turbine blade

2021 ◽  
pp. 095440622110089
Author(s):  
GholamHossein Maleki ◽  
Ali Reza Davari ◽  
Mohammad Reza Soltani
Keyword(s):  
Experimental Investigation ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Active Flow Control ◽  
Leading Edge ◽  
Wind Turbine Blade ◽  
Plasma Actuators ◽  
Plasma Actuation ◽  
Surface Pressure Distribution ◽  
Stall Angle

An extensive experimental investigation was conducted to study the effects of Dielectric Barrier Discharge (DBD), on the flow field of an airfoil at low Reynolds number. The DBD was mounted near the leading edge of a section of a wind turbine blade. It is believed that DBD can postpone the separation point on the airfoil by injecting momentum to the flow. The effects of steady actuations on the velocity profiles in the wake region have been investigated. The tests were performed at α = 4 to 36 degrees i.e. from low to deep stall angles of attack regions. Both surface pressure distribution and wake profile show remarkable improvement at high angles of attack, beyond the static stall angle of the airfoil when the plasma actuation was implemented. The drag calculated from the wake momentum deficit has further shown the favorable role of the plasma actuators to control the flow over the airfoil at incidences beyond the static stall angle of attack of this airfoil. The results demonstrated that DBD has been able to postpone the stall onset significantly. It has been observed that the best performance for the plasma actuation for this airfoil is in the deep stall angles of attack range. However, below and near the static stall angles of attack, plasma augmentation was pointed out to have a negligible improvement in the aerodynamic behavior.

Dynamic prediction fatigue life of composite wind turbine blade

2015 ◽  
Vol 18 (3) ◽  
pp. 673-691 ◽  
Author(s):  
Samir Lecheb ◽  
Abdelkader Nour ◽  
Ahmed Chellil ◽  
Hamza Mechakra ◽  
Hicham Ghanem ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Turbine Blade ◽  
Dynamic Prediction

A Method of Estimating Wind Turbine Blade Fatigue Life and Damage using Continuum Damage Mechanics

2011 ◽  
Vol 21 (6) ◽  
pp. 810-821 ◽  
Author(s):  
A. Movaghghar ◽  
G. I. Lvov
Keyword(s):  
Fatigue Life ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Damage Mechanics ◽  
Elastic Strain Energy ◽  
Continuum Damage Mechanics ◽  
Wind Turbine Blade ◽  
Mode Shapes ◽  
Ansys Analysis ◽  
Natural Resonance Frequency

In this article, an energy-based model for predicting fatigue life and evaluation of progressive damage in a full composite wind turbine blade is proposed. Itis based on the assumption that the damage growth rate in a composite material depends on the maximum value of elastic strain energy per cycle. Design, finite element modeling, and dynamic analysis of the blade have been performed using ANSYS software. The first five natural frequencies and mode shapes of the blade were calculated and dangerous nodes in the critical location were determined using the modal and harmonic analysis techniques. Obtaining critical stresses from ANSYS analysis, fatigue life of the blade at the first natural resonance frequency was estimated by the model. Results showed that the calculated life of the analyzed blade could meet the design requirement.

Sign in / Sign up

Export Citation Format

Share Document