RESEARCH PAPERS

wind turbine research papers 2013




New Wind Turbine High-speed Shaft Design and Simulation of Hydraulic Shock Absorbers
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ABSTRACT For wind turbine high-speed shaft vibration, this article proposes a hydraulic shock absorber design, and detailed describe the working principle and structure of the shock absorber. Use Amesim Software conduct vibration simulation, confirm that the design is 

Characterization of the geo technical properties of a carbonate clayey silt till for a shallow wind turbine foundation
free download

ABSTRACT Wind energy is a major source of renewable energy and is projected to capture 11% of the energy generation capacity for Ontario by 2018. A number of problems that the energy industry currently faces stem from a lack of understanding of cyclic loading of 

Rapid Assembly of Multifunctional Thin Film Sensors for Wind Turbine Blade Monitoring
free download

ABSTRACT Wind is a competitive, clean, and fast-growing renewable energy industry. However, in order for wind to compete with fossil fuel-based energies, it is necessary to achieve lower cost of energy. One way is to reduce operations and maintenance costs by 

Fast and Effective Multi-Objective Optimisation of Wind Turbine Placement
free download

ABSTRACT The single-objective yield optimisation of wind turbine placements on a given area of land is already a challenging optimization problem. In this article, we tackle the multi- objective variant of this problem: we are taking into account the wake effects that are 

Determination of the combined vibrational and acoustic emission signature of a wind turbine gearbox and generator shaft in service as a pre-requisite for
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ABSTRACT A review of current progress in the condition monitoring of wind turbine gearboxes and generator shaft is presented, including relevant work on gearboxes in other application areas, as an input to the design of a new continuous condition monitoring system with 

PIV in a model wind turbine rotor wake
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ABSTRACT Stereoscopic particle image velocimetry (PIV) measurements of the flow in the wake of scale model of a horizontal axis wind turbine is presented. Near the rotor, measurements are made in vertical planes intersecting the rotor axis. These planes 

State Estimate of Wind Turbine Blades using Geometrically Exact Beam Theory
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ABSTRACT As wind turbine blades fatigue, the blade's dynamic response to loading may be expected to change. The kinematic quantities that exhibit significant changes are important for wind turbine blade operation from the perspective of measurement, estimation, and 

DEVELOPMENT OF MODIFIED WIND TURBINE: A PAST REVIEW
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Wind energy represents a viable alternative, as it is a virtually endless resource. Through the next several decades, renewable energy technologies, thanks to their continually improving performance and cost, and growing recognition of their Environmental, economic and 

Hybrid Electro-Mechanical Simulation Tool for Wind Turbine Generators
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ABSTRACT Wind turbine generators (WTGs) consist of many different components to convert kinetic energy of the wind into electrical energy for end users. Wind energy is accessed to provide mechanical torque for driving the shaft of the electrical generator. The conversion 

Waste water Treatment Plant Wind Turbine Energy Project,
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The Soledad Wastewater Treatment Plant Wind Turbine Energy Project (project) is proposed at the City of Soledad's (City) Wastewater treatment plant in Monterey County, California. The proposed project includes the installation of a single 1.5-megawatt wind energy 

Uncertainties in Damage Prediction of Wind Turbine Blade under Random Gust
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ABSTRACT In the design of wind turbine structures, aeroelastic stability is of utmost importance. The bending-torsion oscillation problem of a representative rotor blade section with structural nonlinearity has been considered. The system is subjected to horizontal random 

Simulation of Thunderstorm Downbursts and Associated Wind Turbine Loads
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This study is focused on simulation of thunderstorm downbursts and associated wind turbine loads. We first present a thunderstorm downburst model, in which the wind field is assumed to result from the summation of an analytical mean field and stochastic turbulence. The 

An Investigation of Different Offshore Wind Turbine Jacket Support Foundation Models Designed for Central Mediterranean Deep Waters
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The trend for improving the cost effectiveness of offshore wind turbines is to maximise wind turbine size while minimising support structure costs. Minimising the support structure costs in deeper waters is undoubtedly more challenging. Studies have shown that the type of 

Development of automated finite element models for large wind turbine blades
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ABSTRACT The design of wind turbine blades to date is done using design codes employing advanced analytic models. While these models are very good for performing many iteration steps in the design process, little is known about the exact stress 

Sideband Algorithm for Automatic Wind Turbine Gearbox Fault Detection and Diagnosis
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ABSTRACT Improving the availability of wind turbines (WT) is critical to minimise the cost of wind energy, especially for offshore installations. Because gearbox downtime has a significant impact on WT availabilities, the development of reliable and costeffective 

Model Fidelity Study of Dynamic Transient Loads in a Wind Turbine Gearbox
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ABSTRACT Transient events cause high loads in wind turbine drivetrain components, so measuring and calculating these loads can improve confidence in drivetrain design. This paper studies the response of the Gearbox Reliability Collaborative 750-kW wind turbine 

A Spectral Model for Evaluating the Effect of Wind Evolution on Wind Turbine Preview Control
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ABSTRACT As wind turbines become larger and more flexible, the potential benefits of load mitigating control systems become more important to reduce fatigue and extend component life. In the last five years, there has been significant research activity exploring the 

Experimental validation of wind turbine higher harmonic control using shaft loads measurements
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ABSTRACT In order to achieve reductions in wind turbine structural loads and to enable further increase of wind turbine rated power and dimensions, individual pitch control algorithms received significant portion of attention in the scientific community in the recent 

Multivariate analysis and prediction of wind turbine response to varying wind field characteristics based on machine learning
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ABSTRACT Site-specific wind field characteristics have a significant impact on the structural response and the lifespan of wind turbines. This paper presents a machine learning approach towards analyzing and predicting the response of wind turbine structures to 

Wind Turbine Upgrades in Denmark: Timing Decisions and the Impact of Government Policy
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ABSTRACT Shutting down and/or upgrading existing productive assets are important economic decisions for the owners of those assets and are also the fundamental decisions that underlie the development of new, growing industries. This paper builds a structural 

Short term power forecasts for large offshore wind turbine arrays
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Executive Summary Methods are presented for precise prediction of windspeeds at a windfarm using a combination of numerical weather prediction models and on-site wind speed measurements. Simple techniques are used to investigate the properties of the 

High-performance Power-driven Design of the Permanent Magnet Direct Drive Wind Turbine
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ABSTRACT This paper describes a high-performance power-driven design of the permanent magnet direct drive wind turbine. The converter power circuit is designed by AN8026, and the converter drive circuit is designed by HCPL316J, then draw the PCB using the design 

Experimental Investigation on Small Horizontal Axis Wind Turbine Rotor Using Winglets
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ABSTRACT The present study explores the possibility of increasing the efficiency of the small horizontal axis wind turbine rotor by adding winglets at the tip of the blade. The effects of changing the winglet configuration with the blade on the power performance of small wind 

Design and Realization of Automatic Fault Diagnosis System of Wind Turbine based on LabVIEW
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ABSTRACT The wind power as a clean energy has been researched and developed by many countries. The onshore wind turbine has difficulty to secure additional location by the depletion of good location and the increase in civil complaint. Therefore, it is essential to 

IEA Annex XX: Dynamic Inflow effects at fast pitching steps on a wind turbine placed in the NASA-Ames wind tunnel
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ABSTRACT This report describes a study on dynamic inflow effects which is carried out within the framework IEA Annex XX'Analysis of NASA-Ames wind tunnel measurements'. The study makes use of measurements which were taken by NREL on a wind turbine which was 

Comparison of APIIEC standards for offshore wind turbine applications in the US Atlantic Ocean: Phase II
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Executive Summary The National Renewable Energy Laboratory (NREL) contracted MMI Engineering to conduct Phase II of the Joint Industry Project on Comparison of two design standards for offshore wind turbines (OWTs) in the United States Outer Continental Shelf 

Research on Lay-up Algorithm and Forming Technology of 1.2 MW Composite Wind TurbineBlade
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ABSTRACT In order to enhance its performance and quality, lay-up molding method is adopted to form large-scale composite wind turbine blade. Composite fibre lay-up of wind turbine blades must be multi-directional lay-up because of its complexity of bearing load and multi 

Assessing the Importance of Nonlinearities in the Development of a Substructure Model for the Wind Turbine CAE Tool FAST
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ABSTRACT The design and analysis of wind turbines are performed using aero-servo- elastic tools that account for the nonlinear coupling between aerodynamics, controls, and structural response. The NREL-developed computer-aided engineering (CAE) tool FAST 

In-Service Measurement of the Small Wind Turbine Test Stand for Structural Health Monitoring
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ABSTRACT This paper presents the research activity performed on a Small Wind Turbine (SWT) test stand. Commercially available turbine was modified towards incorporation of the sensors system for condition monitoring. Installed sensors measure angular shaft position, 

Dynamic Optimization of Drivetrain Gear Ratio to Maximize Wind Turbine Power Generation-Part 1: System Model and Control Framework
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Wind is considered to be one of the most promising resources in the renewable energy portfolio. Still, to make wind energy conversion more economically viable, it is necessary to extract greater power from the wind while minimizing the cost associated with the 

ANALYSIS OF WIND TURBINE DRIVEN DOUBLY FED INDUCTION GENERATOR
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ABSTRACT In recent years wind turbine technology has undergone rapid developments, growth in size and the optimization of wind turbines has enabled wind energy to become increasingly competitive with conventional energy sources. As a result today's wind 

Numerical Analysis of the Flowfield Around a Vertical Axis Wind Turbine
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ABSTRACT Due to the tridimensional nature of the flow, the possible presence of dynamic stall of the blades and the tip vortices, the aerodynamic field around a Vertical Axis Wind Turbine (VAWT) is very complicated. The interaction of these phenomena has not been 

Wind Turbine Blade Coatings with Anti-Erosion Properties
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ABSTRACT Rain erosion is one of the main destructive factors leading to physical failure of wind turbine blade coatings. The whirling-arm rig as one of the most popular rigs in the paint industry for blade coating evaluation is expensive and time consuming to operate. At this 

Energy Based Methods in Wind Turbine Control
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The Problem Previously stable wind turbine systems began exhibiting resonant behavior when put on a floating base. This was quickly determined to be a control problem, caused by the new dynamics in floating operation.a The problem manifests for high wind speeds, when the 

Adaptive Control Design for Aeroelastic Suppression of Wind Turbine Blade
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An aeroelastic model is introduced to analyze blade dynamics and design control strategy of blade vibration suppression. The model is a typical pitch and plunge system coupled with Beddoes-Leishman dynamic stall model, which describes unsteady flow over the spinning 

The Research on the Design of the Vertical Axis Wind Turbine Street Light Pole
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ABSTRACT According to the characteristics of the vertical axis wind turbine, research about the mechanical analysis and inherent frequency in design of the small vertical axis wind generator pole is complete, and simulation on the influence of the structure forms and pole 

Prediction of Wave-induced Tower Loading of Floating Offshore Wind Turbine Systems
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ABSTRACT In this study, SR (Sway-Rocking) model is proposed to consider the floater surge and pitch motions which have large influence on the tower loading of floating wind turbine, so that the tower loading can be estimated by the equivalent static method. A 

Development and Field Test Performance of a Non-conventional Unidirectional Co-Axial Two Series Rotors Micro Wind Turbine
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ABSTRACT The technology of harnessing wind energy through traditional three-bladed large wind turbines is in mature state. There are many disputes about the performance and availability of power output of the small wind turbines. The small wind turbines need 

Study on Common Fault of Wind Turbine
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ABSTRACT Introducing the structure and working principle of wind power generator. Analysising the failure phenomenon and common faults of wind turbines in working, giving measures for troubleshooting and maintenance points, and provide a theoretical 

Nonlinear Wave Forces on an Offshore Wind Turbine Foundation in Shallow Waters
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ABSTRACT In this study, a 3D numerical model was used to predict nonlinear wave forces on a cylindrical pile installed in a shallow water region. The model was based on solving the viscous and incompressible Navier-Stokes equations for a two-phase flow (water and air) 

Concept design of a Modified Airfoil Blade with Drag Assist for a Vertical Axis Micro-Wind Turbine
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ABSTRACT This paper presents the concept design of a modified airfoil blade for the vertical axis wind turbine in a micro wind power prototype which can be used for future research purposes. Airfoil blade turbine is one of the best turbine structures that possess the 

Duration Test Report for the Ventera VT10 Wind Turbine
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1. Background This test was conducted as part of the US Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small wind turbines. Five 

'Wind turbine syndrome': fact or fiction?
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ABSTRACT Objective: Symptoms, including tinnitus, ear pain and vertigo, have been reported following exposure to wind turbine noise. This review addresses the effects of infrasound and low frequency noise and questions the existence of 'wind turbine syndrome'.

Dc motor-based wind turbine emulator using LabVIEW for wind energy conversion system laboratory setup
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This paper describes the development and implementation of a wind turbine emulator (WTE), based on a dc motor, using LabVIEW. The emulator imitates both static and dynamic characteristics of a typical wind turbine (WT) of a wind energy conversion system (WECS). 

BEM Simulation and Performance Analysis of a Small Wind Turbine Rotor
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The blade element momentum (BEM) method is a popular tool for predicting the performance of wind turbine rotors. This study investigated the impact of including factors such as tip loss, hub loss and drag coefficients in BEM simulations of a Bergey XL. 1 small 

MODELING AND CONTROL OF A VARIABLE SPEED VARIABLE PITCH ANGLE PROTOTYPEWIND TURBINE
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ABSTRACT This paper focuses on modeling, control and simulation of a 500 horizontal axis prototype wind turbine that is being developed in the context of the MILRES (National Wind Energy Systems) Project in Turkey. The prototype turbine is designed as variable speed 

Research on Fuzzy Fault Tree Analysis Method for Wind Turbine Gearbox System?
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ABSTRACT Gearbox is one of the key components in wind turbine, and the fault of gearbox will lead to wind turbine shut down inevitably. According to the characteristics of complicated structure as well as fault probabilities and mechanism of the bottom and intermediate 

A New Configuration of Vertical Axis Wind Turbine for a Distributed and Efficient Wind Power Generation System
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Preliminary results obtained for a new configuration lift based vertical-axis wind turbine are shown. The turbine rotor is a cross flow fan type made with high curvature aerodynamic profiles. A reduced scale model of the turbine rotor has been designed and preliminary 

Reliability Compliance Test Method Research for Wind Turbine
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ABSTRACT The reliability model and test method of wind turbine is described in the paper. According to the characteristics of wind turbine product, a truncate sequential compliance method for reliability test is designed, and it is given an example for 1MW wind turbine. 

Wind Turbine O&M and Condition Monitoring Research
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NREL is a national laboratory of the US Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. Wind Turbine O&M and Condition Monitoring Research  24 2013 Wind Turbine CBM Workshop Page 25. 

Calibration and validation of a FAST floating wind turbine model of the DeepCwind scaled tension-leg platform
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ABSTRACT To capture energy from high wind resources located offshore in deep water, wind turbines mounted on floating platforms become more economical than fixed-bottom turbines. Accurate modeling of floating wind turbines, which will see increased tower, 

Characteristic Analysis of Wind Turbine Gearbox Considering Non-Torque Loading
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In the design of wind turbine gearboxes, the most important objective is to improve the durability to guarantee a service life of more than 20 years. This work investigates how external loads caused by wind fluctuation influence both the load distribution over the 

Experimental Study of Atmospheric Ice Detection on Wind Turbine Blade Using Thermal Infrared Technique
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Various techniques have been used by researchers to detect and estimate the associated parameters of atmospheric ice accretion on structures like wind turbine blades in cold regions. Most of these techniques did not perform well in harsh weather conditions. This 

DESIGN OPTIMIZATION AND ANALYSIS OF VERTICAL AXIS WIND TURBINE BLADE
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Wind Energy is clean and renewable source of energy and is also the world's fastest growing energy resource. Keeping in view power shortages and growing cost of energy, the low cost wind energy has become a primary solution. It is imperative that economies and 

Non-linear structural dynamic behavior of large horizontal-axis wind turbine: a flexible multibody system approach
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ABSTRACT This paper shows the development of a flexible multibody model, which coupled with an existing aerodynamical model, is used to numerically simulate the non-linear aeroelastic behavior of large horizontal axis wind turbines. The model is rather general; 

New Wind Turbine High-speed Shaft Design and Simulation of Hydraulic Shock Absorbers
free download

ABSTRACT For wind turbine high-speed shaft vibration, this article proposes a hydraulic shock absorber design, and detailed describe the working principle and structure of the shock absorber. Use Amesim Software conduct vibration simulation, confirm that the design is 

Characterization of the geotechnical properties of a carbonate clayey silt till for a shallow wind turbine foundation
free download

ABSTRACT Wind energy is a major source of renewable energy and is projected to capture 11% of the energy generation capacity for Ontario by 2018. A number of problems that the energy industry currently faces stem from a lack of understanding of cyclic loading of 

Falmouth, M assachusetts wind turbine infrasound and low frequency noise measurements
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Should Soundscape be an integral part for IWT community noise and public health assessments? Will this address,Why are so many neighbors complaining about excessive noise and adverse public health impacts? Leventhall in 20041 wrote that low frequency 

Rapid Assembly of Multifunctional Thin Film Sensors for Wind Turbine Blade Monitoring
free download

ABSTRACT Wind is a competitive, clean, and fast-growing renewable energy industry. However, in order for wind to compete with fossil fuel-based energies, it is necessary to achieve lower cost of energy. One way is to reduce operations and maintenance costs by 

Fast and Effective Multi-Objective Optimisation of Wind Turbine Placement
free download

ABSTRACT The single-objective yield optimisation of wind turbine placements on a given area of land is already a challenging optimization problem. In this article, we tackle the multi- objective variant of this problem: we are taking into account the wake effects that are 

Annoyance can represent a serious degradation of health: wind turbine noise a case study
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Until recently the impacts of noise induced annoyance have been underestimated. Sound which is perceived by humans to be annoying can result in serious harm to human health. Members of society including regulating authorities, industry, health professionals, and the 

Calibration and validation of the FAST dynamic simulation tool for a spar-type floating offshorewind turbine
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–Periodic waves, no wind, H s= 1.92 m, T p= 7.5 s (0.13 Hz)–Consistent heave and tower-X acc at wave frequency–Stronger response for FAST at surge and pitch frequencies–2X wave frequency response in test–slight response in FAST heave. Second-order hydrodynamic 

Dynamic Performance Model for Wind Turbine Generators
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ABSTRACT To characterize the power performance of wind turbine generators (WTGs), the International Electrotechnical Commission provides a power curve for each one based on ten minutes average. This approach causes the problem of systematic errors because of 

Understanding trends in wind turbine prices over the past decade
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Executive Summary Berkeley Lab has gathered price data on 81 US wind turbine transactions totaling 23,850 MW announced from 1997 through early 2011. Figure ES-1 depicts these reported wind turbine transaction prices (along with the associated trend 

Determination of the combined vibrational and acoustic emission signature of a wind turbinegearbox and generator shaft in service as a pre-requisite for
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ABSTRACT A review of current progress in the condition monitoring of wind turbine gearboxes and generator shaft is presented, including relevant work on gearboxes in other application areas, as an input to the design of a new continuous condition monitoring system with 

Condition Monitoring of a Wind Turbine Gearbox Using the Empirical Mode Decomposition Method and Outlier Analysis
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ABSTRACT Wind turbines are subject to variable aerodynamic loads and extreme environmental conditions. Wind turbine components fail frequently, resulting in high maintenance costs. For this reason, gearbox condition monitoring becomes important 

PIV in a model wind turbine rotor wake
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ABSTRACT Stereoscopic particle image velocimetry (PIV) measurements of the flow in the wake of scale model of a horizontal axis wind turbine is presented. Near the rotor, measurements are made in vertical planes intersecting the rotor axis. These planes 

Wind Turbine Noise
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Taken as a whole, the book is a very good first introduction to the unique problems presented by the noise analysis of wind turbine farms. The measurement of the wind turbine noise is complicated by the fact that the turbines only operate when the wind is blowing, 

Effects of Changing Atmospheric Conditions on Wind Turbine Performance
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Multi-megawatt, utility-scale wind turbines operate in a turbulent, thermally-driven atmosphere where wind speed and air temperature vary with height. These changes impact turbine power production and loads in ways that are not well understood.

State Estimate of Wind Turbine Blades using Geometrically Exact Beam Theory
free download

ABSTRACT As wind turbine blades fatigue, the blade's dynamic response to loading may be expected to change. The kinematic quantities that exhibit significant changes are important for wind turbine blade operation from the perspective of measurement, estimation, and 

wind turbine blade design, modelling and simulation



Wind turbine blade analysis using the blade element momentum method version 1.0
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This short document describes a calculation method for wind turbine blades, this method can be used for either analysis of existing machines or the design of new ones. More sophisticated treatments are available but this method has the advantage of being simple

Raptor acuity and wind turbine blade conspicuity
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This report summarizes the results of several studies that were undertaken in an effort to increase the conspicuity of wind turbine blades and reduce raptor fatalities in the wind resource area of the Altamont Pass in central California. The Altamont Pass contains a

The Sandia 100-meter all-glass baseline wind turbine blade: SNL100-00
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Abstract Sandia National Laboratories (SNL) Wind Energy Technologies Department, as part of its ongoing RD efforts, creates and evaluates innovative large blade concepts for horizontal axis wind turbines to promote designs that are more efficient aerodynamically,

Static Test of a Wind Turbine Blade
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Summary Structural health monitoring research is being performed by North Carolina AT (NCAT), the National Renewable Energy Laboratory (NREL) and Sandia Laboratories to develop a smart blade. A smart blade has an embedded sensor system integrated into the

Fatigue of fiberglass wind turbine blade materials
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Issued by Sandia National Laboratories, operated for the United States Department of Energy by Sandia Corporation. NOTICE: This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Govern- ment

Numerical approach for noise reduction of wind turbine blade tip with earth simulator
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Abstract The purpose of this research is to investigate the physical mechanisms associated with tip vortex noise caused by rotating wind turbines with giant size of computational fluid dynamics. The flow and acoustic field around the WINDMELIII wind turbine is simulated

Fatigue performance of wind turbine blade composite materials
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ABSTRACT The fatigue behavior of generic materials used in wind turbine blades has been explored. Coupon testing was carried out under constant amplitude fatigue loading to beyond 107 cycles for most materials. Unidirectional materials preformed close to

The application of non-destructive techniques to the testing of a wind turbine blade
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ABSTRACT NonDestructive Testing (NDT), also called NonDestructive Evaluation (NDE), is commonly used to monitor structures before, during, and after testing. This paper reports on the use of two NDT techniques to monitor the behavior of a typical wind turbine blade

Application of the US high cycle fatigue data base to wind turbine blade lifetime predictions
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ABSTRACT This paper demonstrates a methodology for predicting the service lifetime of wind turbine blades using the high-cycle fatigue data base for typical US blade materials developed by Mandell, et al.(1995). The first step in the analysis is to normalize the data
This tutorial paper presents a load spectrum and an engineering analysis from first principles for estimating the fatigue life of GRP blades of horizontal axis wind turbines. The distributions of aerodynamic loads, w hich affect the fatigue life of the blade, are analyzed

Blade offset and pitch effects on a high solidity vertical axis wind turbine
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A high solidity, small scale, 2.5 m diameter by 3m high Vertical Axis Wind Turbine (VAWT) consisting of three NACA 0015 profile blades, each with a span of 3m and a chord length of 0.4 m, was tested in an open-air wind tunnel facility to investigate the effects of preset toe-

Blade system design studies volume I: composite technologies for large wind turbine blades
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Abstract As part of the US Department of Energy's Wind Partnerships for Advanced Component Technologies (WindPACT) program, Global Energy Concepts LLC (GEC) is performing a study concerning innovations in materials, processes and structural Tip loss corrections are a critical factor in blade element momentum theory when determining optimum blade shape for maximum power production. Using numerical and analytical optima, this paper compares the optimal tip shape using the classical tip loss
A numerical study of rime ice accretion and resultant flow field characteristics of blade profiles for four different fixed speed, stall controlled wind turbines was performed. Analyses were carried out at Reynolds numbers ranging from of 2.5 x 10 6 to 5.5 x 10 6,

Swept wind turbine blade aeroelastic modeling for loads and dynamic behavior
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ABSTRACT A dynamic modeling effort of a swept-blade wind turbine rotor has been conducted. The swept-blade concept was used for increased energy capture without an increase in the turbine loads. The work is part of a Department of Energy contract for

In-field use of laser Doppler vibrometer on a wind turbine blade
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Abstract One of our primary goals was to determine how well a laser Doppler vibrometer (LDV) could measure the structural dynamic response of a wind turbine that was parked in the field. We performed a series of preliminary tests in the lab to determine the basic

Damage detection on a wind turbine blade section
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ABSTRACT. A scanning laser vibrometer and piezoceramic actuators are used for detecting damage on a section of a wind turbine blade. The laser is a noncontact sensor that can measure vibration at a large number of points on a structure over a wide frequency range.

Large-scale wind turbine blade design and aerodynamic analysis
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Abstract Incorporating controlled elitism and dynamic distance crowding strategies, a modified NSGA-II algorithm based on a fast and genetic non-dominated sorting algorithm is developed with the aim of obtaining a novel multi-objective optimization design algorithm

Analysis of a composite blade design for the aoc 15/50 wind turbine using a finite element model
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Abstract A fiberglass blade was designed for the Atlantic Orient Corporation (AOC) H/50 wind turbine through the use of finite element (FE) modeling techniques. In this initial design phase, the goals were: 1) make the blade as stiff as the previously designed laminated

Composite materials fatigue issues in wind turbine blade construction
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ABSTRACT This paper provides an overview of the results of recent studies of composite laminates of interest for wind turbine blade construction. In addition to the primary requirements of stiffness, strength, and ease of processing, wind blade materials must

wind turbine blade design, modelling and simulation 2014



Development of Velocity Flow Field Measurement Method Around a Vertical Axis Wind Turbine Blade Using Particle Image Velocimetry
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Abstract:The vertical axis wind turbine aerodynamics are highly complex and unsteady. Inherent in the operation of VAWTs is the presence of the dynamic stall phenomenon that has a major influence in the overall performance of the rotor. The acquisition of a reliable

A REVIEW: AERODYNAMIC ANALYSIS ON VERTICAL AXIS WIND TURBINE BLADE
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Abstract-This review contains a various work was done on wind blade carried out by different authors around the world wide. It will give the information about different techniques used to enhance the performance of wind mill blade. From the early stage of the project,
Abstract We develop a Vortex Particle-Mesh (VPM) method for the Large Eddy Simulation of wind turbine wakes and coarse scale aerodynamics. Based on the vorticity formulation of the Navier-Stokes equations, the approach combines the advantages of two discretizations.
Maximizing the power output of a wind turbine is possible by ensuring the airfoils along the blade operate at an optimal angle of attack. However, blades deflect under loading but the torsional deflection of wind turbine blades is normally ignored in the blade design process

An Analysis and Optimization of Mechanical Properties to Prolonged Service Life of Horizontal Axis Wind Turbine Blade
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Abstract At present time the conventional sources of energy like oil, gas, coal etc. are mostly used to produce the energy. But their resources are very few and which are near to end so these fuels are getting very costly day by day. So now a day it is necessary to think about

Influence Analysis on Heat Effect of Size Parameter for Mold Heat System of Large-ScaleWind Turbine Blade
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Abstract: Wind turbine blade is the key component of wind power system. Curing is one of the important processes in its production of large-scale composite wind turbine blade. Mold heating system of circulating water affects the quality of resin curing and the productive

Shear Layer and Flow Transition on a Low Speed Full Wind Turbine Blade
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Abstract We present Direct Numerical Simulation (DNS) of low-speed flow past a full stationary wind-turbine blade (without twist). This work is motivated to produce a DNS database for verification of solvers and turbulent models utilized in wind-turbine modeling

Assessing the Importance of Geometric Nonlinear Effects in the Prediction of Wind Turbine BladeLoads
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As the size of commercial wind turbines increases, new blade designs become more flexible in order to comply with the requirement for reduced weights. In normal operation conditions, flexible blades undergo large bending deflections, which exceed 10% of their radius,

ANALYSIS OF BLADE AERODYNAMICS AND OBTAINING THE FORCES OF 1.5 KW HORIZONTAL AXIS DUAL ROTOR WIND TURBINE USING THE ANSYS
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The exploitation of small horizontal axis wind turbines provides a clean and viable option for energy. Although great progress has been achieved in the wind energy sector, there is still potential space to reduce the cost and improve the performance of small wind turbines. An

A Calibrated Blade-Element/Momentum Theory Aerodynamic Model of the MARIN Stock Wind Turbine
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ABSTRACT In this paper, a calibrated blade-element/momentum theory aerodynamic model of the Maritime Research Institute Netherlands (MARIN) stock wind turbine is developed and documented. The model is created using open-source software and calibrated to closely

Assessing the importance of geometric non-linear effects in the prediction of wind turbine bladeloads
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ABSTRACT As the size of commercial wind turbines increases, new blade designs become more flexible in order to comply with the requirement for reduced weights. In normal operation conditions, flexible blades undergo large bending deflections, which exceed 10

Perturbing Design Optimization of Wind Turbine Blade towards Minimizing Dynamic Response Variation Using NURBS Finite Elements
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Abstract In real circumstances, the engineering structures are always subject to the uncertainties due to the material imperfection, machining tolerance, and the assemblage error, etc. The variation in structural vibratory response caused by such uncertainties may
A mathematic rotating blade model is introduced in conjunction with periodic time-varying aerodynamic load, which is described by Beddoes-Leishman dynamic stall model. The consequent aeroelastic model is utilized to analyze blade dynamics and design control

Wind turbine blade flapwise vibration control through input shaping
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Abstract: Wind turbine blade vibration is a serious problem not only because it will reduce the life of blade but also can it pass some unexpected frequencies to the tower, which will cause tower to vibrate. The aim of this paper is to develop a model for wind turbine

Investigating the Effects of Flatback Airfoils and Blade Slenderness on the Design of LargeWind Turbine Blades
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Abstract: Design and development of large blades is very challenging due to economics, logistics, and technical barriers. Regarding the technical barriers, designs must satisfy deflection, buckling, fatigue, and stability requirements. This is a very challenging design

Implementation of a Biaxial Resonant Fatigue Test Method on a Large Wind Turbine Blade
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Executive Summary A biaxial resonant test method was used to simultaneously fatigue test a wind turbine blade in the flapwise and lead-lag directions. The biaxial resonant blade fatigue testing described in this report is an accelerated life test method that uses inertial

ANALYSIS OF WIND TURBINE BLADE VIBRATION AND DRIVETRAIN LOADS
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The reliability of wind turbines is a major issue for the industry. Drivetrain and blade failures are common, costly and not fully understood. Designers must thus examine and understand the key parameters that influence reliability. As wind turbines increase in size, the blades

A Verification and Validation of the Geometrically Exact Beam Theory with Legendre Spectral Finite Elements for Wind Turbine Blade Analysis
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ABSTRACT Composite wind turbine blades continue to get larger and have more complex geometry than ever before. Additionally, they are becoming lighter in proportion to their size. Lighter and larger wind turbine blades result in structures that are highly flexible. It is

Application of Blade Element Momentum Theory to the Analysis of a Horizontal Axis Wind Turbine
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ABSTRACT The prediction of the aerodynamic performance of horizontal axis wind turbines is of great importance in the design and analysis of such systems. Recent progress in computational power made Computational Fluid Dynamics (CFD) suitable for accurate

Optimization Design of Wind Turbine Blade based on MATLAB
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Abstract The author to Willson wind turbine blade optimization design mathematical model, draw the corresponding program block diagram, and use MATLAB high-level programming language to write the wind turbine blade aerodynamic design program. Application of the

Meta Heuristic Method for the Design Optimization of a Wind Turbine Blade
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Abstract The cost of wind turbine is the important criteria to make the wind energy competitive. The manufacturing cost of wind turbine blade is about 15-20% of wind turbine production cost. The expenses of innovations in the design of turbine blades represent the

Design and Fabrication of Flipping Blade Vertical Axis Wind Turbine
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Abstract Wind energy is one of the renewable sources, used to generate an electric power generation. The search for environment friendly, sustainable energy has promoted in this industrial world. The present global technological society is depended on the availability

Numerical simulation and aeroacoustic noise modelling of a wind turbine using a bladesection in an annulus
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ABSTRACT Noise disturbance from wind turbines is one of the major factors which slows wind farm development near populated areas. Therefore, it is important to have an accurate estimate of the noise generated before production and installation of wind turbines. Large

CFD study of a twisted blade H-Darrieus wind turbine
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Abstract In this paper, a two-dimensional Computational Fluid Dynamics (CFD) study of the performance of a H-Darrieus turbine with three twisted blade had been carried out. The chord length of each blade is 5cm and the blade height is considered to be same for all

Swept Blade Aero-Elastic Model for a Small Wind Turbine
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higher fidelity representation of presweep and bend of blades A case study on a small wind turbine revealed the capabilities of simulating the effect of blade sweep using ADAMS Results show promising effects in terms of load mitigation: Max.

Experimental Measurements of Rotating and Stationary Wind Turbine Rotor Blade Noise
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Abstract A wind turbine rotor has been constructed for the investigation of airfoil self-noise, rotational noise and blade tower interaction noise. The main aim of this paper is to compare the aerodynamic noise created by stationary and rotating rotor blades. Furthermore, the Blade root fatigue stress, primarily resulting from wind shear and turbulence, is a critical factor in wind turbine design. Blade mounted aerodynamic control devices have been shown to have the potential to reduce this. However, limited research exists into suitable

Inclusion of a simple dynamic inflow model in the blade element momentum theory for wind turbine application
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ABSTRACT It is well established that the power generated by a Horizontal-Axis Wind Turbine (HAWT) is a function of the number of blades B, the tip speed ratio r (blade tip speed/wind free-stream velocity) and the lift to drag ratio (CL/CD) of the airfoil sections of

MESH CONVERGENCE STUDY FOR 2-D STRAIGHT-BLADE VERTICAL AXIS WIND TURBINE SIMULATIONS AND ESTIMATION FOR 3-D SIMULATIONS
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ABSTRACT Mesh resolution requirements are investigated for 2-D and 3-D simulations of the complex flow around a straight-blade vertical axis wind turbine (VAWT). The resulting flow, which may include large separation flows over the blades, dynamic stall, and wake-

The Study on the Wind Turbine under Wind Disturbance Based on Vector Control and BladePitch Control
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Analysis of Wind Turbine Blade
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Abstract Blades are the most critical component of a wind turbine which is responsible for conversion of wind energy into kinetic energy. Aerodynamics is a science and study of physical laws of the behavior of objects in airflow and the forces that are produced by

COMPARATIVE STUDY OF TRANSIENT AND QUASI-STEADY AEROELASTIC ANALYSIS OF COMPOSITE WIND TURBINE BLADE IN STEADY WIND
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The objective of this study is to conduct a comparative study of the transient and quasi- steady aeroelastic analysis of a composite wind turbine blade in steady wind conditions. Transient analysis of the wind turbine blade is performed by the multibody dynamic code

DESIGN OPTIMIZATION OF WHIFFLETREE SYSTEMS FOR WIND TURBINE BLADETESTING
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DESIGN OPTIMIZATION OF WHIFFLETREE SYSTEMS FOR WIND TURBINE BLADE TESTING submitted by SÜLEYMAN CEM YENICELI in partial fulfillment of the requirements for the degree of Master of Science in Aerospace Engineering Department, Middle East

Influence of Blade Overlap and Blade Angle on the Aerodynamic Coefficients in Vertical Axis Swirling type Savonius Wind Turbine
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Abstract When compared with other wind turbines, drag driven vertical axis Savonius wind turbine offers lower power coefficient due to its slow turning speed. However, they have many advantages over others, such as simplicity of manufacturing, ability to operate in any

Design of Blade for a Wooden Small scale wind turbine for domestic purpose
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Abstract This paper focuses on the design and manufacture of a wind turbine blade which is utilized to generate the power of 375 Watts. The objective of this work is to develop a domestic wind turbine which works at low wind speeds and which can be made available

maglev wind turbine



Research on Forces and Dynamics of Maglev Wind Turbine Generator
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Maglev wind turbine generator (MWTG) technology has been widely studied due to its low loss, low maintenance cost, and high reliability. However, the dynamics of the magnetic bearing system differ fromthe those of the traditional mechanical bearing system. A

Magnetic suspension and self-pitch for vertical-axis wind turbines
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Magnetic suspension technology applied to wind turbine is an emerging technology; the development of maglev magnetic wind turbine is just beginning. Although there claimed many maglevwindturbine products have been developed, relevant published studies are rare.

Comparative Assessment of a Horizontal Small Wind Turbine with Ball and Magnetic Bearings on the Starting
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systems. The first one considers a wind turbine system where the friction moment is given by ball bearings. The second one proposes the replacement of the ball bearings by magnetic bearings called maglevwindturbine. The

Public entrepreneurship: A dynamic strength for budding green technology
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Proceedings of the 4th National Conference; INDIACom-2010 G. The MagLevWindTurbine is a big step forward in the world of wind power. By using magnetism to levitate the blades friction is eliminated and more power can be produced without any additional power expense.

Going green: the growing role of permanent magnets in renewable energy production and environmental protection
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Source: Treehugger.com [2006 2008] From MagLevWindTurbine Tech Claims ability to produce 1GW Vertically aligned rotor Magnetic levitated using PMs Minimal friction losses Scant information available! 0.3 kW Chinese maglev turbines available

MagLev Windmill
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The Maglevwindturbine design is a vast departure from con- ventional propeller designs. It also requires little if any maintenance. The Maglevwindturbine was first unveiled at the Wind Power Asia exhibition in Beijing 2007.

PROJECT REFERENCE NO.: 38S0510
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MR. MM DANDINAVAR Keywords: wind energy; maglevwindturbine; neodymium permanent magnet; vertical and horizontal configurations. performance at lower wind velocities. Page 5. 5 At 1.5 m/s wind velocity vertical axis maglevwindturbine rotates at about 66.67 %

Concept design of a Modified Airfoil Blade with Drag Assist for a Vertical Axis Micro-Wind Turbine
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The tapered, twisted and airfoil characteristics should all be combined in order to give the best possible energy capture for the rotor speed and site conditions [8]. In 2007 the super-powered MagLevwindturbine was first unveiled at the wind Power Asia exhibition in Beijing.

Micro-Wind Turbine Design Background Report
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Three design innovations used in benchmarking and idea generation are: the Dragonfly wind turbine, Robert Howell's design and the MagLevwindturbine. Lastly, the MagLevWindTurbine uses magnetism to suspend parts of its system, thereby eliminating frictional effects.

Research on Forces and Dynamics of Maglev Wind Turbine Generator
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Maglev wind turbine generator (MWTG) technology has been widely studied due to its low loss, low maintenance cost, and high reliability. However, the dynamics of the magnetic bearing system differ fromthe those of the traditional mechanical bearing system. A

Maglav Windmall Redefined
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2011. 3. MagLevWindTurbine Technologies, Inc.(MWTT) Off Grid Technologies, Inc.(OGT), Vertical Axis Wind Turbine 200 Mega Watt off Shore Wind Farm (VAWT Off Shore JV)-City of Evanston, Illinois Lake Michigan Project.

Micro-Wind Turbine Design Final Report
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Section 4.3 discusses each design at the subsystem level. Three design innovations used in benchmarking and idea generation are: the Dragonfly Wind Turbine, Robert Howell's design and the MagLevWindTurbine. 3.1 Design Research MagLevWindTurbine

MicroWind Turbine Design
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Section 4.3 discusses each design at the subsystem level. Three design innovations used in benchmarking and idea generation are: the Dragonfly Wind Turbine, Robert Howell's design and the MagLevWindTurbine. 3.1 Design Research MagLevWindTurbine

Directions for Wind Industry in Massachusetts
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Directions for Wind Industry


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