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Flow Control Of A Wind Turbine Airfoil Under Aero Elastic Pitching
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Book Synopsis Flow Control of a Wind Turbine Airfoil Under Aero-elastic Pitching by : Pourya Nikoueeyan
Download or read book Flow Control of a Wind Turbine Airfoil Under Aero-elastic Pitching written by Pourya Nikoueeyan and published by . This book was released on 2015 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Active flow control has demonstrated promising advantages in addressing problems associated with dynamic stall in large wind turbine blades. The feasibility of employing Gurney flaps for active flow control of a pitching flatback airfoil has been assessed in this study. The effectiveness of the Gurney flap in different steady and unsteady inflow conditions from attached-flow to deep dynamic stall condition were characterized by acquiring surface pressure measurements and Particle Image Velocimetry data. The results indicate that the Gurney flap has significant authority in changing the aerodynamics that can affect the aeroelastic behavior of the pitching system used in this work. The fast transient aerodynamics of the airfoil during Gurney flap deployment is also considered as a necessary requirement for an effective closed-loop control scheme. The results show great potential in using the Gurney flap as an effective and fast responding flow control device that can regulate blade loading in a broad range of inflow conditions.
Book Synopsis Aerodynamics of Wind Turbines by : Martin O. L. Hansen
Download or read book Aerodynamics of Wind Turbines written by Martin O. L. Hansen and published by Earthscan. This book was released on 2000 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wind power is an increasingly significant renewable energy resource, producing no environmentally damaging CO2 emissions. The efficient production of electricity by wind turbines relies on aerodynamics: Aerodynamics of Wind Turbines provides the fundamental solutions to efficient wind turbine design. Following a historical introduction, Part 1 of Aerodynamics of Wind Turbines is concerned with basic rotor aerodynamics, while Part 2 deals with structural aspects of the wind turbine and calculation of the loads on it. Topics covered include increasing mass flow through the turbine, performance at low and high wind speeds, assessment of the extreme conditions under which the turbine will perform and the theory for calculating the lifetime of the turbine. The classical Blade Element Momentum method is also covered, as are eigenmodes and the dynamic behavior of a turbine. Aerodynamics of Wind Turbines is an essential reference for both engineering students and others with a professional or academic interest in the physics and technologies behind horizontal axis wind turbines. It will provide a sound understanding of the mechanisms behind the generation of forces on a wind turbine.
Book Synopsis Aerodynamics of Wind Turbines, 2nd edition by : Martin O. L. Hansen
Download or read book Aerodynamics of Wind Turbines, 2nd edition written by Martin O. L. Hansen and published by Routledge. This book was released on 2013-05-13 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aerodynamics of Wind Turbines is the established essential text for the fundamental solutions to efficient wind turbine design. Now in its second edition, it has been entirely updated and substantially extended to reflect advances in technology, research into rotor aerodynamics and the structural response of the wind turbine structure. Topics covered include increasing mass flow through the turbine, performance at low and high wind speeds, assessment of the extreme conditions under which the turbine will perform and the theory for calculating the lifetime of the turbine. The classical Blade Element Momentum method is also covered, as are eigenmodes and the dynamic behaviour of a turbine. The new material includes a description of the effects of the dynamics and how this can be modelled in an ?aeroelastic code?, which is widely used in the design and verification of modern wind turbines. Further, the description of how to calculate the vibration of the whole construction, as well as the time varying loads, has been substantially updated.
Book Synopsis Handbook of Wind Energy Aerodynamics by : Bernhard Stoevesandt
Download or read book Handbook of Wind Energy Aerodynamics written by Bernhard Stoevesandt and published by Springer Nature. This book was released on 2022-08-04 with total page 1495 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook provides both a comprehensive overview and deep insights on the state-of-the-art methods used in wind turbine aerodynamics, as well as their advantages and limits. The focus of this work is specifically on wind turbines, where the aerodynamics are different from that of other fields due to the turbulent wind fields they face and the resultant differences in structural requirements. It gives a complete picture of research in the field, taking into account the different approaches which are applied. This book would be useful to professionals, academics, researchers and students working in the field.
Book Synopsis Compliance Effects on Dynamically Pitching Wind Turbine Airfoils by : Andrew S. Magstadt
Download or read book Compliance Effects on Dynamically Pitching Wind Turbine Airfoils written by Andrew S. Magstadt and published by . This book was released on 2014 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of elastic compliance in dynamically pitching wind turbine blades have been investigated. A numerical model guided wind tunnel testing, which used unsteady surface pressure measurements and phase-locked Particle Imaging Velocimetry to gather aerodynamic information. Using a torsionally compliant member, aeroelastic effects on the unsteady aerodynamics were compared against the results from a corresponding rigidly pitching airfoil to isolate the effects of compliance. The novel experimental apparatus and data acquisition techniques developed at the University of Wyoming showed that the presence of compliance can alter flow-field structures and increase dynamic loading. The high sensitivity of this nonlinear system suggests the formation of fluid-structure instabilities in large-scale turbines and demonstrates the potential for aerodynamic control as a means to mitigate adverse loading effects and improve wind turbine efficiency.
Book Synopsis Aerodynamics of Wind Turbines by : Martin Hansen
Download or read book Aerodynamics of Wind Turbines written by Martin Hansen and published by Routledge. This book was released on 2015-05-01 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aerodynamics of Wind Turbines is the established essential text for the fundamental solutions to efficient wind turbine design. Now in its third edition, it has been substantially updated with respect to structural dynamics and control. The new control chapter now includes details on how to design a classical pitch and torque regulator to control rotational speed and power, while the section on structural dynamics has been extended with a simplified mechanical system explaining the phenomena of forward and backward whirling modes. Readers will also benefit from a new chapter on Vertical Axis Wind Turbines (VAWT). Topics covered include increasing mass flow through the turbine, performance at low and high wind speeds, assessment of the extreme conditions under which the turbine will perform and the theory for calculating the lifetime of the turbine. The classical Blade Element Momentum method is also covered, as are eigenmodes and the dynamic behaviour of a turbine. The book describes the effects of the dynamics and how this can be modelled in an aeroelastic code, which is widely used in the design and verification of modern wind turbines. Furthermore, it examines how to calculate the vibration of the whole construction, as well as the time varying loads and global case studies.
Book Synopsis Wind Turbine Aerodynamics and Vorticity-Based Methods by : Emmanuel Branlard
Download or read book Wind Turbine Aerodynamics and Vorticity-Based Methods written by Emmanuel Branlard and published by Springer. This book was released on 2017-04-05 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book introduces the fundamentals of fluid-mechanics, momentum theories, vortex theories and vortex methods necessary for the study of rotors aerodynamics and wind-turbines aerodynamics in particular. Rotor theories are presented in a great level of details at the beginning of the book. These theories include: the blade element theory, the Kutta-Joukowski theory, the momentum theory and the blade element momentum method. A part of the book is dedicated to the description and implementation of vortex methods. The remaining of the book focuses on the study of wind turbine aerodynamics using vortex-theory analyses or vortex-methods. Examples of vortex-theory applications are: optimal rotor design, tip-loss corrections, yaw-models and dynamic inflow models. Historical derivations and recent extensions of the models are presented. The cylindrical vortex model is another example of a simple analytical vortex model presented in this book. This model leads to the development of different BEM models and it is also used to provide the analytical velocity field upstream of a turbine or a wind farm under aligned or yawed conditions. Different applications of numerical vortex methods are presented. Numerical methods are used for instance to investigate the influence of a wind turbine on the incoming turbulence. Sheared inflows and aero-elastic simulations are investigated using vortex methods for the first time. Many analytical flows are derived in details: vortex rings, vortex cylinders, Hill's vortex, vortex blobs etc. They are used throughout the book to devise simple rotor models or to validate the implementation of numerical methods. Several Matlab programs are provided to ease some of the most complex implementations.
Book Synopsis Wind Turbines by : Abdel Ghani Aissaoui
Download or read book Wind Turbines written by Abdel Ghani Aissaoui and published by BoD – Books on Demand. This book was released on 2016-07-27 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Renewable energies constitute excellent solutions to both the increase of energy consumption and environment problems. Among these energies, wind energy is very interesting. Wind energy is the subject of advanced research. In the development of wind turbine, the design of its different structures is very important. It will ensure: the robustness of the system, the energy efficiency, the optimal cost and the high reliability. The use of advanced control technology and new technology products allows bringing the wind energy conversion system in its optimal operating mode. Different strategies of control can be applied on generators, systems relating to blades, etc. in order to extract maximal power from the wind. The goal of this book is to present recent works on design, control and applications in wind energy conversion systems.
Book Synopsis Aerodynamics of Wind Turbines by : R.S. Amano
Download or read book Aerodynamics of Wind Turbines written by R.S. Amano and published by WIT Press. This book was released on 2014-11-24 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on Aerodynamics of Wind Turbines with topics ranging from Fundamental to Application of horizontal axis wind turbines, this book presents advanced topics including: Basic Theory for Wind turbine Blade Aerodynamics, Dynamics-Based Health Monitoring and Control of Wind Turbine Rotors, Experimental Testing of Wind Turbines Using Wind Tunnels with an Emphasis on Small-Scale Wind Turbines Under Low-Reynolds Numbers, Computational Methods, Ice Accretion for Wind Turbines and Influence of Some Parameters, and Special Structural Reinforcement Technique for Wind Turbine Blades. Consequently, for these reasons, analysis of wind turbines will attract readers not only from the wind energy community but also in the gas turbines heat transfer and fluid mechanics community.
Book Synopsis Assessment of Research Needs for Wind Turbine Rotor Materials Technology by : National Research Council
Download or read book Assessment of Research Needs for Wind Turbine Rotor Materials Technology written by National Research Council and published by National Academies Press. This book was released on 1991-01-01 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wind-driven power systems represent a renewable energy technology. Arrays of interconnected wind turbines can convert power carried by the wind into electricity. This book defines a research and development agenda for the U.S. Department of Energy's wind energy program in hopes of improving the performance of this emerging technology.
Book Synopsis Wind Turbine Airfoils and Blades by : Jin Chen
Download or read book Wind Turbine Airfoils and Blades written by Jin Chen and published by Walter de Gruyter GmbH & Co KG. This book was released on 2017-12-04 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wind Turbine Airfoils and Blades introduces new ideas in the design of wind turbine airfoils and blades based on functional integral theory and the finite element method, accompanied by results from wind tunnel testing. The authors also discuss the optimization of wind turbine blades as well as results from aerodynamic analysis. This book is suitable for researchers and engineers in aeronautics and can be used as a textbook for graduate students.
Book Synopsis Wind Turbine Aerodynamics by : Wen Zhong Shen
Download or read book Wind Turbine Aerodynamics written by Wen Zhong Shen and published by MDPI. This book was released on 2019-10-04 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wind turbine aerodynamics is one of the central subjects of wind turbine technology. To reduce the levelized cost of energy (LCOE), the size of a single wind turbine has been increased to 12 MW at present, with further increases expected in the near future. Big wind turbines and their associated wind farms have many advantages but also challenges. The typical effects are mainly related to the increase in Reynolds number and blade flexibility. This Special Issue is a collection of 21 important research works addressing the aerodynamic challenges appearing in such developments. The 21 research papers cover a wide range of problems related to wind turbine aerodynamics, which includes atmospheric turbulent flow modeling, wind turbine flow modeling, wind turbine design, wind turbine control, wind farm flow modeling in complex terrain, wind turbine noise modeling, vertical axis wind turbine, and offshore wind energy. Readers from all over the globe are expected to greatly benefit from this Special Issue collection regarding their own work and the goal of enabling the technological development of new environmentally friendly and cost-effective wind energy systems in order to reach the target of 100% energy use from renewable sources, worldwide, by 2050
Book Synopsis Assessment of Research Needs for Wind Turbine Rotor Materials Technology by : National Research Council
Download or read book Assessment of Research Needs for Wind Turbine Rotor Materials Technology written by National Research Council and published by National Academies Press. This book was released on 1991-02-01 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wind-driven power systems represent a renewable energy technology. Arrays of interconnected wind turbines can convert power carried by the wind into electricity. This book defines a research and development agenda for the U.S. Department of Energy's wind energy program in hopes of improving the performance of this emerging technology.
Book Synopsis Wind Turbine Control Systems by : Fernando D. Bianchi
Download or read book Wind Turbine Control Systems written by Fernando D. Bianchi and published by Springer Science & Business Media. This book was released on 2006-09-07 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book emphasizes the application of Linear Parameter Varying (LPV) gain scheduling techniques to the control of wind energy conversion systems. This reformulation of the classical problem of gain scheduling allows straightforward design procedure and simple controller implementation. From an overview of basic wind energy conversion, to analysis of common control strategies, to design details for LPV gain-scheduled controllers for both fixed- and variable-pitch, this is a thorough and informative monograph.
Book Synopsis Smart Rotor Modeling by : Leonardo Bergami
Download or read book Smart Rotor Modeling written by Leonardo Bergami and published by Springer. This book was released on 2014-05-30 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: A smart rotor is a wind turbine rotor that, through a combination of sensors, control units and actuators actively reduces the variation of the aerodynamic loads it has to withstand. Smart rotors feature promising load alleviation potential and might provide the technological breakthrough required by the next generation of large wind turbine rotors. The book presents the aero-servo-elastic model of a smart rotor with Adaptive Trailing Edge Flaps for active load alleviation and provides an insight on the rotor aerodynamic, structural and control modeling. A novel model for the unsteady aerodynamics of an air foil section with flap is presented and coupled with a multi-body structural representation. A smart rotor configuration is proposed, where the Adaptive Trailing Edge Flaps extend along the outer 20 % of the blade span. Linear Quadratic and Model Predictive algorithms are formulated to control the flap deflection. The potential of the smart rotor is finally confirmed by simulations in a turbulent wind field. A significant reduction of the fatigue loads on the blades is reported: the flaps, which cover no more than 1.5 % of the blade surface, reduce the fatigue load by 15 %; a combination of flap and individual pitch control allows for fatigue reductions up to 30 %.
Book Synopsis Advances in Wind Power by : Rupp Carriveau
Download or read book Advances in Wind Power written by Rupp Carriveau and published by BoD – Books on Demand. This book was released on 2012-11-21 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today's wind energy industry is at a crossroads. Global economic instability has threatened or eliminated many financial incentives that have been important to the development of specific markets. Now more than ever, this essential element of the world energy mosaic will require innovative research and strategic collaborations to bolster the industry as it moves forward. This text details topics fundamental to the efficient operation of modern commercial farms and highlights advanced research that will enable next-generation wind energy technologies. The book is organized into three sections, Inflow and Wake Influences on Turbine Performance, Turbine Structural Response, and Power Conversion, Control and Integration. In addition to fundamental concepts, the reader will be exposed to comprehensive treatments of topics like wake dynamics, analysis of complex turbine blades, and power electronics in small-scale wind turbine systems.
Book Synopsis Wind Turbine Aerodynamics and Flow Control by : Karthik Jayanarasimhan
Download or read book Wind Turbine Aerodynamics and Flow Control written by Karthik Jayanarasimhan and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aerodynamics is one of the prime topics in wind turbine research. In aerodynamics, the design of a flow control mechanism lays the foundation for an efficient power output. Lift generation in the airfoil section leading to rotary motion of blade and transfer of mechanical to electrical power generation through gearbox assembly. The primary objective of a flow control mechanism in wind turbine blades is to delay the stall and increase the lift, thereby an efficient power generation. Flow control is classified into active and passive flow control mechanisms. Active flow control works on an actuation mechanism that comes into action when required during varied operating conditions. Passive flow control devices are designed, developed, and fixed on the surface to extract the required output through effective flow control. Vortex generators are the simplest, most cost-effective and efficient passive flow control devices. These devices influence the power of wind turbine blades in various ways, such as placement of generator along the chord, distance between pairs of a generator, angle of inclination of a generator with the blade surface, the height of generator. Flow control device needs to be optimized with the aforementioned parameters for efficient stall delay and power generation.
