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Dissertations / Theses on the topic 'Horizontal axis wind turbine (HAWT)'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Al-Hadad, Mohammed. "Vibration Fault Detection for Horizontal Axis Wind Turbines (HAWT)." Thesis, Curtin University, 2019. http://hdl.handle.net/20.500.11937/77966.

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This research has investigated novel vibration condition monitoring methods for horizontal-axis wind turbines for a range of case studies simulating various failure modes of the blades and tower, including the effect of coupling of rotating and non-rotating components of the system. A small scale experimental test rig has been created and developed to monitor vibration behaviour under different transient loads as a function of rotor phase, including the measurement of blade, driveshaft, and tower vibrations.

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2

Jaohindy, Placide. "Modélisation des systèmes éoliens verticaux intégrés aux bâtiments : modélisation du couple production / Bâtiment." Thesis, La Réunion, 2012. http://www.theses.fr/2012LARE0005/document.

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La technique d'intégration des systèmes éoliens verticaux (VAWT) au service des logements individuels, collectifs et tertiaires est une approche intéressante pour les acteurs de la maitrise d'énergie pour promouvoir une utilisation rationnelle de l'énergie. Le choix de l'implantation d'une éolienne en milieu urbain est déterminé par la hauteur des bâtiments, la vitesse du vent et l'intensité de turbulence du site. Les conditions de vents sévères à faible altitude sont favorables à une implantation de VAWT. Dans certaines villes, la hauteur moyenne des bâtiments est relativement faible et ceci

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3

Almutairi, Badriya L. "Investigating the feasibility and soil-structure integrity of onshore wind turbine systems in Kuwait." Thesis, Loughborough University, 2017. https://dspace.lboro.ac.uk/2134/27612.

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Wind energy technologies are considered to be among the most promising types of renewable energy sources, which have since attracted broad considerations through recent years due to the soaring oil prices and the growing concerns over climate change and energy security. In Kuwait, rapid industrialisation, population growth and increasing water desalination are resulting in high energy demand growth, increasing the concern of oil diminishing as a main source of energy and the climate change caused by CO2 emissions from fossil fuel based energy. These demands and challenges compelled governments

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4

Kim, Youjin [Verfasser], Taeseong [Akademischer Betreuer] Kim, and Antonio [Gutachter] Delgado. "Computational airfoil optimization for the improvement of the performance of horizontal axis wind turbines (HAWT) with a 3D model / Youjin Kim ; Gutachter: Antonio Delgado ; Betreuer: Taeseong Kim." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2020. http://d-nb.info/1213533341/34.

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5

Shawler, James R. "Engineering aerodynamics of horizontal axis wind turbines (HAWTs)." Thesis, Loughborough University, 2004. https://dspace.lboro.ac.uk/2134/7629.

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This thesis comprises two main original contributions. The first concerns the aeroelastic modelling of a large-scale prototype wind turbine undertaken specifically to explain experimentally observed mechanical instabilities. The second explores the aerodynamic aspect of turbine modelling in greater detail since this is the main identified technical challenge, this process makes use of detailed largescale wind tunnel test data from NREL for model validation purposes. The MS4 prototype wind turbine was modelled using ADAMS/WT software, the aerodynamic model was provided by the NREL AERODYN subro

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6

Nygard, Øyvind Vik. "Wake behind a horizontal-axis wind turbine." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-13691.

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In this paper theory on cylinder and wind turbine wakes have been studied, and experimental work on the wake behind a wind turbine have been carried out in the Fluids engineering laboratory at NTNU.The objective of this paper is to show and explain how the wake from the tower of a wind turbine develops and interacts with the rotor wake. It is desirable to study the wake for different operating conditions of the wind turbine to see how the wake development is affected. A summary of classical wake theory, aerodynamics and wind turbine wakes will be given. Measurements in the wake of a cylinder f

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7

Hankin, David. "Wake impacting on a horizontal axis wind turbine." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/24565.

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Offshore wind is set to contribute a significant portion of the UK's renewable energy production. In order to achieve this, installation costs must be reduced and energy density optimised, but this must be balanced with the increase in maintenance costs resulting from fatigue due to wake impact. The aim of this thesis is to investigate the effects of horizontal axis wind turbine wake impact on a downstream rotor. A force-free wake implementation of the unsteady vortex lattice method has been developed in order to simulate the flow around the downstream rotor, including the effects of an upstre

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8

Al-Khudairi, Othman. "Structural performance of horizontal axis wind turbine blade." Thesis, Kingston University, 2014. http://eprints.kingston.ac.uk/32197/.

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The power output from a wind turbine is proportional to rotor swept area and as a result in the past 30 years continuous effort has been made to design larger blades. In this period, the blade length has been increased about 10 times since 1980s to present time. With the longest blade currently measuring more than 100m in length, wind turbine blade designers and manufacturers face enormous challenges to encounter the effect of increased weight and other loads on fatigue durability of the blade. Wind turbine blades are mainly made from glass fibre reinforced plastic (GFRP) composite. materials.

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9

Gwon, Tae gyun. "Structural Analyses of Wind Turbine Tower for 3 kW Horizontal Axis Wind Turbine." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/600.

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Structure analyses of a steel tower for Cal Poly's 3 kW small wind turbine is presented. First, some general design aspects of the wind turbine tower are discussed: types, heights, and some other factors that can be considered for the design of wind turbine tower. Then, Cal Poly's wind turbine tower design is presented, highlighting its main design features. Secondly, structure analysis for Cal Poly's wind turbine tower is discussed and presented. The loads that are specific to the wind turbine system and the tower are explained. The loads for the static analysis of the tower were calculated a

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10

Duran, Serhat. "Computer-aided Design Of Horizontal-axis Wind Turbine Blades." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12605790/index.pdf.

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Designing horizontal-axis wind turbine (HAWT) blades to achieve satisfactory levels of performance starts with knowledge of the aerodynamic forces acting on the blades. In this thesis, HAWT blade design is studied from the aspect of aerodynamic view and the basic principles of the aerodynamic behaviors of HAWTs are investigated. Blade-element momentum theory (BEM) known as also strip theory, which is the current mainstay of aerodynamic design and analysis of HAWT blades, is used for HAWT blade design in this thesis. Firstly, blade design procedure for an optimum rotor according to BEM theory i

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11

Wang, Tongguang. "Unsteady aerodynamic modelling of horizontal axis wind turbine performance." Thesis, University of Glasgow, 1999. http://theses.gla.ac.uk/4039/.

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The present work presents a study of unsteady aerodynamic modelling of horizontal axis wind turbine performance. The unsteady aspects addressed in this work include effects of variations in turbine inflow velocity due to operation in yawed flow, in the atmospheric boundary layer, in a wind tunnel, and due to the tower wake. In each case, the basis for the analysis is a prescribed wake vortex model, the development and enhancement of which has been the main focus of the work. A high resolution model has been developed to meet the requirement for adequate representation of the tower shadow effec

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12

Abdulqadir, Sherwan Ahmed. "Turbulence modelling for horizontal axis wind turbine rotor blades." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/turbulence-modeling-for-horizontal-axis-wind-turbine-rotor-blades(2536b213-3a0c-4977-ac39-916a9fce98d2).html.

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This Thesis aims to assess the reliability of turbulence models in predicting the flow fields around the horizontal axis wind turbine (HAWT) rotor blades and also to improve our understanding of the aerodynamics of the flow field around the blades. The simulations are validated against data from the NREL/NASA Phase VI wind turbine experiments. The simulations encompass the use of fourteen turbulence models including low-and high-Reynolds-number, linear and non-linear eddy-viscosity models and Reynolds stress models. The numerical procedure is based on the finite-volume discretization of the 3D

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13

Caboni, Marco. "Probabilistic design optimization of horizontal axis wind turbine rotors." Thesis, University of Glasgow, 2016. http://theses.gla.ac.uk/7338/.

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Considerable interest in renewable energy has increased in recent years due to the concerns raised over the environmental impact of conventional energy sources and their price volatility. In particular, wind power has enjoyed a dramatic global growth in installed capacity over the past few decades. Nowadays, the advancement of wind turbine industry represents a challenge for several engineering areas, including materials science, computer science, aerodynamics, analytical design and analysis methods, testing and monitoring, and power electronics. In particular, the technological improvement of

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14

Campo, Gatell Vanessa del. "Experimenal study of the aerodynamics of a horizontal axis wind turbine." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/116325.

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One of the challenges of the wind energy community today is to improve the existing background on the aerodynamic phenomena of a Horizontal Axis Wind Turbine (HAWT), the prediction of the wind speed distribution on the rotor plane, and the estimation of the design loads. This dissertation aims at contributing to the fulfillment of these objectives. In this way, this study assessed the feasibility of measuring the loads exerted on a HAWT blade by means of Stereoscopic Particle Image Velocimetry (SPIV), which is a non intrusive technique that provides with the whole 3D velocity field in a pl

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15

Tang, Xinzi. "Aerodynamic design and analysis of small horizontal axis wind turbine blades." Thesis, University of Central Lancashire, 2012. http://clok.uclan.ac.uk/7127/.

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The exploitation of small horizontal axis wind turbines provides a clean, prospective and viable option for energy supply. 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 enhanced understanding of how small wind turbines interact with the wind turns out to be essential. This work investigates the aerodynamic design and analysis of small horizontal axis wind turbine blades via the blade element momentum (BEM) based approach and the computational fluid dynamics (CFD) base

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16

Wimshurst, Aidan. "Tip flow corrections for horizontal axis wind and tidal turbine rotors." Thesis, University of Oxford, 2018. http://ora.ox.ac.uk/objects/uuid:a91acd6f-dc86-4cad-bf5e-b042e81840dc.

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On the outboard sections of horizontal axis rotor blades (that are not enclosed within a duct or shroud), vorticity is shed into the wake of the rotor. The shed vorticity induces a downwash at the rotor plane and span- wise flow accelerations along the blade, which causes the blade loading to drop off as the tip is approached. These tip flow effects are currently not adequately accounted for by reduced order rotor models (such as the blade element momentum and actuator line methods) which are frequently used to represent wind and tidal turbine rotors in large simulations. Hence, the rotor thru

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17

Worasinchai, Supakit. "Small wind turbine starting behaviour." Thesis, Durham University, 2012. http://etheses.dur.ac.uk/4436/.

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Small wind turbines that operate in low-wind environments are prone to suffer performance degradation as they often fail to accelerate to a steady, power-producing condition. The behaviour during this process is called “starting behaviour” and it is the subject of this present work. This thesis evaluates potential benefits that can be obtained from the improvement of starting behaviour, investigates, in particular, small wind turbine starting behaviour (both horizontal- and vertical-axis), and presents aerofoil performance characteristics (both steady and unsteady) needed for the analysis. All

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18

Pratumnopharat, Panu. "Novel methods for fatigue data editing for horizontal axis wind turbine blades." Thesis, Northumbria University, 2012. http://nrl.northumbria.ac.uk/10458/.

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Wind turbine blades are the most critical components of wind turbines. Full-scale blade fatigue testing is required to verify that the blades possess the strength and service life specified in the design. Unfortunately, the test must be run for a long time period. This problem led the blade testing laboratories to accelerate fatigue testing time. To achieve the objective, this thesis proposes two novel methods called STFT- and WT-based fatigue damage part extracting methods which are based on short-time Fourier transform (STFT) and wavelet transform (WT), respectively. For WT, different wavele

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19

Vimalakanthan, Kisorthman. "Passive flow control devices for a multi megawatt horizontal axis wind turbine." Thesis, Cranfield University, 2014. http://dspace.lib.cranfield.ac.uk/handle/1826/12132.

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Renewable energy is an environmentally friendly alternative to the use of fossil fuels. In response to reducing the dependency on fossil fuels, the European Wind Energy Association (EWEA) has made a policy to increase the overall renewable energy consumption by three times the current amount by the year 2020. Critical to achieving this target will be the use of wind turbines. There is a scope to increase the performance of wind turbines by utilising the existing techniques from the aeronautical industry. One of these techniques is the use of passive flow control which involves no moving parts

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20

Yucel, Burak. "Performance Prediction Of Horizontal Axis Wind Turbines Using Vortex Theory." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605715/index.pdf.

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iv Performance prediction of HAWTs is important because it gives an idea about the power production of a HAWT in out of design conditions without making any experiments. Since the experiments of fluid mechanics are difficult to afford, developing some models is very beneficial. There are some models developed about this subject using miscellaneous methods. In this study, one can find &ldquo<br>Vortex Theory&rdquo<br>among one of these theories. Some basic 3D aerodynamics was discussed in order to make the reader to understand the main subject of this study. Just after that, performance predict

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21

Taylor, D. "The design and testing of a horizontal axis wind turbine with sailfoil blades." Thesis, Open University, 1985. http://oro.open.ac.uk/54193/.

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The work contained in this thesis covers the design, development and testing of a horizontal axis wind turbine (HAWT) with Sailfoil blades. Included is a brief history of wind turbine technology, its revival, a review of current wind energy developments and a literature survey of previous work on wind turbines with sail type blades. The Sailfoil blade consists of a framework of a leading edge D spar and a rigid trailing edge spar over which is stretched a fabric sock, forming a wing-like surface. The aerodynamic performance theories of HAWTs are described, as is the aerodynamic, structural and

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22

Simoes, Francisco Jose. "A steady inviscid flow model for horizontal axis wind turbine rotors under high loading." Thesis, Imperial College London, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261843.

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23

Poole, Sean. "The development of a segmented variable pitch small horizontal axis wind turbine with active pitch control." Thesis, Nelson Mandela Metropolitan University, 2013. http://hdl.handle.net/10948/d1020583.

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Small scale wind turbines operating in an urban environment produce dismal amounts of power when compared to their expected output [1-4]. This is largely due to the gusty wind conditions found in an urban environment, coupled with the fact that the wind turbines are not designed for these conditions. A new concept of a Segmented Variable Pitch (SVP) wind turbine has been proposed, which has a strong possibility to perform well in gusty and variable wind conditions. This dissertation explains the concept of a SVP wind turbine in more detail and shows analytical and experimental results relating

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24

Poole, Sean Nichola. "Optimisation of a mini horizontal axis wind turbine to increase energy yield during short duration wind variations." Thesis, Nelson Mandela Metropolitan University, 2017. http://hdl.handle.net/10948/7036.

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The typical methodology for analytically designing a wind turbine blade is by means of blade element momentum (BEM) theory, whereby the aerofoil angle of attack is optimized to achieve a maximum lift-to-drag ratio. This research aims to show that an alternative optimisation methodology could yield better results, especially in gusty and turbulent wind conditions. This alternative method looks at increasing the aerofoil Reynolds number by increasing the aerofoil chord length. The increased Reynolds number generally increases the e_ectiveness of the aerofoil which would result in a higher or sim

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25

Oljelund, David. "Dimensionering och konstruktion av passiv mekanisk pitch för småskaliga horisontalaxlade vindkraftverk." Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-42348.

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För vindkraftverk i mindre skala används i huvudsak två sätt att avlasta vid höga vindhastigheter, stallreglering och girning ur vind. En tredje metod är att pitcha rotorbladet till en mindre attackvinkel. Då minskar belastningen på rotorbladet samtidigt som effektgenerering kan bibehållas. Arbetet redovisar en konstruktion för en fjädrande passiv mekanisk pitch som avgränsats till att enbart dimensionera en vridfjäder och tre lager. Konstruktionen riktas mot horisontalaxlade vindkraftverk med tre rotorblad med en rotordiameter upp till 20m. Ett idealt rotorblad modelleras matematiskt för att

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26

Khamlaj, Tariq A. "Analysis and Optimization of Shrouded Horizontal Axis Wind Turbines." University of Dayton / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1543845571758119.

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27

Farhan, Ali M. "Numerical study of the effect of winglets on a horizontal axis wind turbine performance." Thesis, University of Leeds, 2018. http://etheses.whiterose.ac.uk/22493/.

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With increasing demand for producing clean and pollution free energy, special attention has been paid to wind turbines and improving their performance. Reducing the effect of wingtip vortices on the wind turbine performance can be achieved by using winglets which work to weaken the impact of wingtip vortices by diffusing them away from the blade tips. The general trend of the literature has considered winglets as diffusers of the wingtip vortices. However, extending the span of the turbine rotor by attaching winglet could improve the potential of a rotor to capture more kinetic energy from mov

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28

Perry, Dylan R. "AERODYNAMIC DESIGN AND STRUCTURAL ANALYSIS PROCEDURE FOR SMALL HORIZONTAL-AXIS WIND TURBINE ROTOR BLADE." DigitalCommons@CalPoly, 2015. https://digitalcommons.calpoly.edu/theses/1375.

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This project accomplished two correlated goals of designing a new rotor blade to be used with the Cal Poly Wind Power Research Center, as well as defining the methodology required for the aerodynamic analysis of an optimized blade, the procedure required for generation of an accurate CAD model for the new blade geometry, and structural integrity verification procedure for the new blade via finite element analysis under several operating scenarios. The new rotor blades were designed to perform at peak efficiency at a much lower wind speed than the current CPWPRC rotor blades and incorporated a

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29

Sagol, Ece. "Site Specific Design Optimization Of A Horizontal Axis Wind Turbine Based On Minimum Cost Of Energy." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12611604/index.pdf.

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This thesis introduces a design optimization methodology that is based on minimizing the Cost of Energy (COE) of a Horizontal Axis Wind Turbine (HAWT) that is to be operated at a specific wind site. In the design methodology for the calculation of the Cost of Energy, the Annual Energy Production (AEP) model to calculate the total energy generated by a unit wind turbine throughout a year and the total cost of that turbine are used. The AEP is calculated using the Blade Element Momentum (BEM) theory for wind turbine power and the Weibull distribution for the wind speed characteristics of selecte

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30

Elfarra, Monier A. K. "Horizontal Axis Wind Turbine Rotor Blade: Winglet And Twist Aerodynamic Design And Optimization Using Cfd." Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12612987/index.pdf.

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The main purpose of this study is to aerodynamically design and optimize winglet, twist angle distribution and pitch angle for a wind turbine blade using CFD to produce more power. The RANS solver of Numeca Fine/Turbo was validated by two test cases, the NREL II and NREL VI blades. The results have shown a considerable agreement with measurements for both cases. Two different preconditioners have been implemented for the low Mach number flow. The results have shown the superiority of Merkle preconditioner over Hakimi one and Merkle was selected for further simulations. In addition to that, dif

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31

Ashglaf, Mohmed Omran. "Development of Hybridization concept for horizontal axis wind / tidal systems using functional similarities and advanced real-time emulation methods." Thesis, Normandie, 2019. http://www.theses.fr/2019NORMLH07/document.

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La capacité des systèmes conventionnels de production d'énergie éolienne et marémotrice à fournir au réseau une énergie fiable et stable à tout moment est un nouveau défi en raison des fluctuations météorologiques, qui ont un impact significatif et direct sur la production d'énergie. C'est pourquoi l'hybridation des systèmes de production d'énergie éolienne et hydrolienne ont été étudiées pour améliorer l'intégration des énergies éolienne et marémotrice sur le réseau électrique.Cette étude nous a amené à développer des contributions liées à deux axes principaux :Le premier axe est focalisé sur

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Pietrangeli, Sven. "Comparison of fixed diameter and variable diameter wind turbines driving a permanent magnet hub motor." Thesis, Cape Peninsula University of Technology, 2012. http://hdl.handle.net/20.500.11838/1283.

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Thesis submitted in fulfilment of the requirements for the degree MAGISTER TECHNOLOGIAE: Mechanical Engineering in the FACULTY OF ENGINEERING at the CAPE PENINSULA UNIVERSITY OF TECHNOLOGY, 2012<br>The amount of power a horizontal axis wind turbine (HAWT) can produce is determined by two main factors, wind velocity and rotor swept area. Theory dictates that the power production of a horizontal wind turbine is related to the cube of wind velocity and the square of the turbine diameter (or radius). The power produced at any given time is thus dependent on of the wind velocity and the rotor swept

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33

Tongchitpakdee, Chanin. "Computational Studies of the Effects of Active and Passive Circulation Enhancement Concepts on Wind Turbine Performance." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/16152.

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With the advantage of modern high speed computers, there has been an increased interest in the use of first-principles based computational approaches for the aerodynamic modeling of horizontal axis wind turbine (HAWT). Since these approaches are based on the laws of conservation (mass, momentum, and energy), they can capture much of the physics in great detail. The ability to accurately predict the airloads and power output can greatly aid the designers in tailoring the aerodynamic and aeroelastic features of the configuration. First-principles based analyses are also valuable for developing a

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Luz, José Leandro Rosales. "Análise numérica do desempenho da turbina eólica de eixo horizontal NREL UAE Phase VI." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/79827.

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O presente trabalho realiza um estudo do desempenho aerodinâmico da turbina eólica de duas pás e 10 m de diâmetro da UAE Phase VI, testada pelo NREL no túnel de vento NASA Ames, através do uso de dinâmica dos fluidos computacional (CFD). Para tanto são apresentados conceitos fundamentais para análise da performance do aerogerador, a metodologia aplicada para a análise numérica e os resultados obtidos. O modelo geométrico da turbina foi inserido em ambiente computacional num domínio com as mesmas dimensões da seção de testes do túnel de vento. A esse domínio foi empregada uma malha de elementos

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Polat, Ozge. "Genetic Algorithm Based Aerodynamic Shape Optimization Of Wind Turbine Rotor Blades Using A 2 D Panel Method With A Boundary Layer Solver." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613970/index.pdf.

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This thesis presents an aerodynamic shape optimization methodology for rotor blades of horizontal axis wind turbines. Genetic Algorithm and Blade Element Momentum Theory are implemented in order to find maximum power production at a specific wind speed, rotor speed and rotor diameter. The potential flow solver, XFOIL, provides viscous aerodynamic data of the airfoils. Optimization variables are selected as the sectional chord length, the sectional twist and the blade profiles at root, mid and tip regions of the blade. The blade sections are defined by the NACA four digit airfoil series or arbi

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Fleck, Gustavo Dias. "Simulação de grandes escalas para análise numérica da esteira aerodinâmica da turbina eólica NREL UAE Phase VI." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/60727.

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O experimento Unsteady Aerodynamics Experiment Phase VI, realizado no ano de 2000 pelo Laboratório Nacional norte-americano para as Energias Renováveis (NREL) no túnel de vento Ames da NASA, foi reproduzido numericamente neste trabalho. O objetivo é o estudo das características da esteira aerodinâmica produzida pela turbina eólica de duas pás e 10 metros de diâmetro, operando à velocidade de rotação constante de 72 RPM, sujeita a uma velocidade de corrente livre do vento uniforme de 9 m/s, em um túnel de vento cuja seção de testes mede 36,6 m de largura por 24,4 m de altura e o comprimento med

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Horn, Diego Anderson. "Análise numérica da esteira aerodinâmica formada por uma turbina eólica com dimensionamento ótimo de Betz." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/26540.

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A evolução do uso da energia eólica nas últimas décadas está diretamente relacionada ao desenvolvimento da tecnologia empregada na conversão e projeto das instalações. A viabilização de uma instalação eólica de grande porte depende da avaliação correta do potencial eólico. A fim de avaliar a capacidade de conversão de energia cinética do vento em torque, é fundamental a modelagem da esteira aerodinâmica das turbinas eólicas. Este trabalho apresenta um estudo sobre a esteira aerodinâmica formada por uma turbina eólica dimensionada conforme a teoria de otimização de Betz. Para tanto, realiza-se

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Yi-ChenKuo and 郭奕甄. "The Performance Analysis of Rotor Blades for Horizontal-Axis Wind Turbine (HAWT) and Vertical-Axis Wind Turbine (VAWT)." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/50081116018964036703.

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碩士<br>國立成功大學<br>航空太空工程學系碩博士班<br>100<br>This thesis employs the modified blade element momentum theory, computational simulation, and wind tunnel experiment to analyze and compare respectively the performance rotor blades used in Horizontal-Axis wind turbine (HAWT) and Vertical-Axis wind turbine (VAWT). The Blade element momentum theory is used to predict the rotor performance of HAWT and the adopted double-multiple streamtube model to calculate that of VAWT. For computational simulation, it uses the same turbulent model to simulate the rotors. Furthermore, the performance of the rotor is obtai

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Meng-HsienLee and 李孟賢. "Numerical Simulation of The Aerodynamic Performance of Horizontal-Axis Wind Turbine (HAWT) Blades." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/36598377533212258961.

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碩士<br>國立成功大學<br>航空太空工程學系<br>102<br>The purpose of this study is to investigate the differences of the aerodynamic performance on the horizontal-axis wind turbine blades of two different type of geometry shape. One of the blade is designed by blade element momentum theory (BEMT), and the other blade is a non-twisted with a constant chord length, which is called Baseline blade. In order to investigate on the BEMT designed blade, in which has a great performance of power coefficient than Baseline blade. Therefore, the effect of the aerodynamic performance on the blades would be investigated in th

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Sethi, Aditya Kumar, and Vijay Ravichandran. "Pitch Control of Horizontal Axis Wind Turbine." Thesis, 2011. http://ethesis.nitrkl.ac.in/2430/1/Pitch_Control_of_Horizontal_Axis_Wind_Turbine.pdf.

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Wind energy is fast becoming the most preferable alternative to conventional sources of electric power. Owing to the perennial availability of wind and the considerable range of power control, wind turbines are now coming up in almost all parts of the world. In the early days of development, wind turbines were designed to rotate at constant speed through pitch control or stall control. The modern wind turbines implement pitch control in order to tap maximum energy at wind speeds lower than rated wind speed. In this project, three different models of pitch actuator system have been studied and

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Wu, Pei-Rong, and 吳培榕. "Development Of Wind Direction Tracking System For Horizontal Axis Wind Turbine." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/49226959949173197007.

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碩士<br>聖約翰科技大學<br>電機產業研發碩士專班<br>100<br>Due to the increase of the atmospheric carbon dioxide (CO2) concentration, the renewable energy, also called “green energy”, without any emission of CO2 has attracted much attention to replace the traditional combustion of fossil fuel. To date, the horizontal axis wind power generator is one of the most efficient renewable energy sources. However, its efficacy is highly dependent on the wind direction. In this work, a control system allowing the horizontal axis wind power generator to automatically track wind direction changes is developed and adopted PIC1

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"COMPUTER-AIDED DESIGN OF HORIZONTAL-AXIS WIND TURBINE BLADES." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12605790/index.pdf.

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Tsai, Shan-Han, and 蔡深翰. "The Study of Horizontal-Axis Wind Turbine with Diffusers." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/81268659039267109587.

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碩士<br>淡江大學<br>航空太空工程學系碩士班<br>101<br>This study used the computational fluid dynamics software, Fluent, and computer aided design softwares, Pro/Engineer, Gambit, and Tecplot to study the flow field of horizontal-axis wind turbine, HAWT, with diffusers. This study was divided into two parts. The first part studied the effects of various parameters on the acceleration performance of a diffuser. These parameters included diffuser body length, expansion angle, flange, and inlet shroud. The second part investigated the effects of combining the blades and diffuser. We calculated the torque gener

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Lee, Hu Chia, and 李胡嘉. "Design of 10kW Horizontal Axis Wind Turbine Assembled Blades." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/5aw6b6.

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碩士<br>長庚大學<br>機械工程學系<br>105<br>The size and weight of a wind turbine blade increase with the output power of the wind turbine. The increase of blade mass represents the increase of rotor inertia that increases the cut-in wind speed and reduces the energy efficiency of the wind turbine. To reduce the mass of the blades, composit materials are often used to build hollow blades but the manpower and time are costly. In this study, the blades of a 10 kW horizontal axis wind turbine are analized and optimally designed with material mechanics, aerodynamics, and Taguchi method in order to produce holl

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Khan, Muhammad Mohsin K. "Reliability analysis and condition monitoring or a horizontal axis wind turbine /." 2005.

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Lee, Nian-Ze, and 李念澤. "Aerodynamic and Aeroacoustic Prediction of a Horizontal-Axis Wind Turbine." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/08361964798117224115.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>103<br>In this study, the full-scale numerical simulations are performed at rated wind velocity (11.4 m/s) and rated rotor speed (12.1 rpm). The aerodynamic and aeroacoustic prediction of a NREL 5MW offshore wind turbine is performed via a Fluid-Structure Interaction (FSI) approach. The Navier–Stokes equations are used to describe the incompressible and viscous flow around the wind turbine. A k- model is adopted to take the turbulence effects of wind into account. This study used a finite volume method to discretize the governing equations. The FWH model is employed

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Kendall, David Arthur. "Hinged blade model dynamics for a horizontal axis wind turbine." 2003. https://scholarworks.umass.edu/dissertations/AAI3110510.

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This dissertation describes fundamental extensions to the hinge-spring model used to simulate the first mode of blade vibration in wind turbine dynamics. Complete equations of motion are developed while allowing for both bending of the blade perpendicular to its chord and overall motion of the rotor in azimuth and yaw. The model examines the relationship between the natural rotation frequency of the rotor ω and the fundamental natural bending frequency of the blades without including the bending frequency of the tower. In the case of no yaw motion, perturbation analysis and iteration lead to a

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Jian, Ming-Yan, and 簡名硯. "Research and Development of Small Horizontal-axis Wind Turbine System." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/28077900731736239826.

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碩士<br>淡江大學<br>航空太空工程學系碩士班<br>99<br>This thesis is concerned with the research and development of a small horizontal-axis wind turbine system for moving vehicles. Specifically, this study investigates the characteristics matching problems between the rotor blade and generator, and develops a generator output control system using a micro-controller. The characteristics of some available generators are tested using a generator test bench. These generators are combined with the existing rotor blades to evaluate the matching availability. The controller designed of this system uses a microchip PIC1

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Gao, Shi-Han, and 高詩涵. "Canard for horizontal axis wind turbine application and Taguchi method analysis." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/65p25w.

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McWilliam, Michael Kenneth. "Development of a Wind Tunnel Test Apparatus for Horizontal Axis Wind Turbine Rotor Testing." Thesis, 2008. http://hdl.handle.net/10012/4075.

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Currently, wind energy presents an excellent opportunity to satisfy the growing demand without the supply and environmental problems associated with conventional energy. The engineering in wind turbines is not fully mature. There are still phenomenon, particularly dynamic stall, that cannot accurately be modeled or controlled. Dynamic stall contributes to fatigue stress and premature failure in many turbine components. The three dimensionality of dynamic stall makes these structures unique for wind turbines. Currently, flow visualization of dynamic stall on a wind turbine rotor has not been ac

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