Download or read book Modelling and Numerical Simulation of Wind Turbine Performance in Rainy Conditions Using a Multiphase Flow Approach written by Ming Cai and published by . This book was released on 2012 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Simulation of Wind Turbines written by Alessandro Bianchini and published by MDPI. This book was released on 2021-09-10 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book contains the research contributions belonging to the Special Issue "Numerical Simulation of Wind Turbines", published in 2020-2021. They consist of 15 original research papers and 1 editorial. Different topics are discussed, from innovative design solutions for large and small wind turbine to control, from advanced simulation techniques to noise prediction. The variety of methods used in the research contributions testifies the need for a holistic approach to the design and simulation of modern wind turbines and will be able to stimulate the interest of the wind energy community.

Download or read book A Coupled Lagrangian Eulerian Multiphase Model for Simulation of Wind Turbines Performance Under Rainy Conditions written by Aiden C. Cohan and published by . This book was released on 2016 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wind Turbine Aerodynamic Performance Calculation written by Tongguang Wang and published by Springer Nature. This book was released on 2023-12-15 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with horizontal-axis wind turbine aerodynamic performance prediction methods. It focuses on the traditional and newly-developed methods for the wind turbine aerodynamic performance calculation. The fundamental theories of fluid mechanics essential for understanding the other parts of this book are firstly introduced in Part I, followed by the blade element momentum theory in Part II, with special attentions to a systematic review of various correction models. Part III is mainly about the prescribed and free vortex wake methods, while the state-of-art computational fluid dynamics (CFD) methods are detailed in Part IV. Part III thoroughly describes the prescribed and free vortex wake methods which are still of great importance towards realistic investigation of wind turbine performance. Despite the highly computational cost, the CFD methods in Part IV have received increasing interest from the academic community since they provide more detailed information about the flow field around the wind turbine. This has shed a light in combination with the correction models introduced in Part II on more advanced research for wind turbine. This book is intended for researchers and students interested in aerodynamics of wind turbine and is particularly suitable for practicing engineers in wind energy. Readers can gain a comprehensive understanding in both classical and up-to-date methods for the study of wind turbine aerodynamics. The authors hope that this book can promote the research and development of wind turbines.

Download or read book Numerical Simulation of Wind Turbines written by Giovanni Ferrara and published by . This book was released on 2021 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book contains the research contributions belonging to the Special Issue "Numerical Simulation of Wind Turbines", published in 2020-2021. They consist of 15 original research papers and 1 editorial. Different topics are discussed, from innovative design solutions for large and small wind turbine to control, from advanced simulation techniques to noise prediction. The variety of methods used in the research contributions testifies the need for a holistic approach to the design and simulation of modern wind turbines and will be able to stimulate the interest of the wind energy community.

Download or read book Numerical Simulation of Local Climatic Impact of an Operating Wind Turbine written by Yuan Yang and published by Open Dissertation Press. This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Numerical Simulation of Local Climatic Impact of an Operating Wind Turbine" by Yuan, Yang, 杨源, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Wind energy is commonly considered to be a clean and environmentally friendly renewable energy resource, as they do not pollute our atmosphere with greenhouse gas, nor do they cause any radioactive problems compared to nuclear energy. However, there are still some environmental impacts due to the installation and operation of the wind turbines that cannot be ignored, such as noise, visual and climatic impact. Especially, the observed local climate change in some wind farm areas has attracted general concern in recent years. Experts suspected that long time operation of wind turbines in an area can cause changes to local precipitation, evaporation of the water on earth surface, and even affect the frequency of drought happening. Nevertheless, we still cannot figure out whether these changes would be caused by wind turbines or not. The target of this study is to investigate the potential local impact of an operating wind turbine by numerical simulation. Because of the big geometric size of commercial wind turbines, experimental method is very limited in this type of study. Numerical simulation using CFD is considered to be a suitable approach and commercial software "FLUENT" is utilized in this study. Firstly, an accurate 3-D numerical wind turbine model was established and the frozen blade method was used to realize the rotation of the wind blades. Before further simulation, a wind-tunnel test has been undertaken by using a scaled physical wind turbine model for validation purpose. The experimental results show good agreement with those predicted by the numerical simulation. This suggested that the computation results were validated and the computational model can be used for further study. In this research, three wind turbine cases, with different typical ambient temperature and surface temperature, were simulated. Characters like wake structure, turbulence intensity and local temperature change was collected and analyzed in each simulated case. The results show that the operating wind turbine can bring obvious velocity deficit in the wake and a strong turbulence intensity enhancement was observed at the top tip because of the rotation. Also, local temperature change was found in the near wake region. The investigation of the local impact of the operating wind turbine is very significant. This study provides a valuable insight into the potential impacts of wind farms on local meteorology, which is rarely studied before. Meanwhile, a more comprehensive study on the effect of a wind farm on the environment is highly recommended. DOI: 10.5353/th_b5016282 Subjects: Wind turbines - Environmental aspects

Download or read book An Integrated Nonlinear Wind Waves Model for Offshore Wind Turbines written by Enzo Marino and published by Firenze University Press. This book was released on 2010 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a numerical model capable of simulating offshore wind turbines exposed to extreme loading conditions. External condition-based extreme responses are reproduced by coupling a fully nonlinear wave kinematic solver with a hydro-aero-elastic simulator. First, a two-dimensional fully nonlinear wave simulator is developed. The transient nonlinear free surface problem is formulated assuming the potential theory and a high-order boundary element method is implemented to discretize Laplace's equation. For temporal evolution a second-order Taylor series expansion is used. The code, after validation with experimental data, is successfully adopted to simulate overturning plunging breakers which give rise to dangerous impact loads when they break against wind turbine substructures. Emphasis is then placed on the random nature of the waves. Indeed, through a domain decomposition technique a global simulation framework embedding the numerical wave simulator into a more general stochastic environment is developed. The proposed model is meant as a contribution to meet the more and more pressing demand for research in the offshore wind energy sector as it permits taking into account dangerous effects on the structural response so as to increase the global structural safety level.

Download or read book Reliability Based Optimization of Floating Wind Turbine Support Structures written by Mareike Leimeister and published by Springer Nature. This book was released on 2023-01-01 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book pursues the ambitious goal of combining floating wind turbine design optimization and reliability assessment, which has in fact not been done before. The topic is organized into a series of very ambitious objectives, which start with an initial state-of-the-art review, followed by the development of high-fidelity frameworks for a disruptive way to design next generation floating offshore wind turbine (FOWT) support structures. The development of a verified aero-hydro-servo-elastic coupled numerical model of dynamics for FOWTs and a holistic framework for automated simulation and optimization of FOWT systems, which is later used for the coupling of design optimization with reliability assessment of FOWT systems in a computationally and time-efficient manner, has been an aim of many groups internationally towards implementing a performance-based/goal-setting approach in the design of complex engineering systems. The outcomes of this work quantify the benefits of an optimal design with a lower mass while fulfilling design constraints. Illustrating that comprehensive design methods can be combined with reliability analysis and optimization algorithms towards an integrated reliability-based design optimization (RBDO) can benefit not only the offshore wind energy industry but also other applications such as, among others, civil infrastructure, aerospace, and automotive engineering.

Download or read book Numerical simulation of the flow around a wind turbine using OpenFOAM written by Oscar Alejandro Urbina Rivas and published by . This book was released on 2014 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modeling and Control Aspects of Wind Power Systems written by S. M. Muyeen and published by BoD – Books on Demand. This book was released on 2013-03-20 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the recent development and progress of the wind energy conversion system. The chapters are contributed by prominent researchers in the field of wind energy and cover grid integration issues, modern control theories applied in wind energy conversion system, and dynamic and transient stability studies. Modeling and control strategies of different variable speed wind generators such as switched reluctance generator, permanent magnet synchronous generator, doubly-fed induction generator, including the suitable power electronic converter topologies for grid integration, are discussed. Real time control study of wind farm using Real Time Digital Simulator (RTDS) is also included in the book, along with Fault ride through, street light application, integrated power flow solutions, direct power control, wireless coded deadbeat power control, and other interesting topics.

Download or read book Numerical Modeling of Wind Turbine Aerodynamics written by and published by . This book was released on 2011 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: A three-dimensional numerical method was used to validate the aerodynamic performance of a two-bladed wind turbine. The method is based on ideal fluid mechanics (e.g., potential flow) and the simpler governing equations require only a few minutes of computational time. The spiral wake is modeled as a vortex sheet, providing the induced velocity effects without vortex decay, a problem inherent to some other numerical methods. Also, for an efficient wind turbine design, flow-separation on the blades must be avoided. Therefore, for such attached flow problems, the current inviscid-flow model is not only faster but provides satisfactory results. Calculated torque, axial force, and efficiency values compared well with similar data published by NREL (National Research Energy Laboratory) for a two-bladed wind turbine. Blade-section pressure coefficients were also calculated and presented for this baseline design and areas where flow separation is possible were identified. Based on these observations, a modified airfoil section was proposed, using the same blade planform geometry. Computed results and comparisons with the baseline wind turbine geometry indicate that improvements in both power and efficiency are possible (in spite of the baseline being very well designed). The method presented here paves the way for a more comprehensive redesign modification where both blade shape, twist and airfoil section can be improved. This approach can enhance performance over a wider range of wind turbine geometry and wind speed conditions.

Download or read book Modeling and Modern Control of Wind Power written by Qiuwei Wu and published by John Wiley & Sons. This book was released on 2017-12-15 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: An essential reference to the modeling techniques of wind turbine systems for the application of advanced control methods This book covers the modeling of wind power and application of modern control methods to the wind power control—specifically the models of type 3 and type 4 wind turbines. The modeling aspects will help readers to streamline the wind turbine and wind power plant modeling, and reduce the burden of power system simulations to investigate the impact of wind power on power systems. The use of modern control methods will help technology development, especially from the perspective of manufactures. Chapter coverage includes: status of wind power development, grid code requirements for wind power integration; modeling and control of doubly fed induction generator (DFIG) wind turbine generator (WTG); optimal control strategy for load reduction of full scale converter (FSC) WTG; clustering based WTG model linearization; adaptive control of wind turbines for maximum power point tracking (MPPT); distributed model predictive active power control of wind power plants and energy storage systems; model predictive voltage control of wind power plants; control of wind power plant clusters; and fault ride-through capability enhancement of VSC HVDC connected offshore wind power plants. Modeling and Modern Control of Wind Power also features tables, illustrations, case studies, and an appendix showing a selection of typical test systems and the code of adaptive and distributed model predictive control. Analyzes the developments in control methods for wind turbines (focusing on type 3 and type 4 wind turbines) Provides an overview of the latest changes in grid code requirements for wind power integration Reviews the operation characteristics of the FSC and DFIG WTG Presents production efficiency improvement of WTG under uncertainties and disturbances with adaptive control Deals with model predictive active and reactive power control of wind power plants Describes enhanced control of VSC HVDC connected offshore wind power plants Modeling and Modern Control of Wind Power is ideal for PhD students and researchers studying the field, but is also highly beneficial to engineers and transmission system operators (TSOs), wind turbine manufacturers, and consulting companies.

Download or read book Experimental Numerical Simulation and Mathematical Modelling of Vane Type Vertical Axis Wind Turbine written by Kadhim Hussein Suffer Al-Zaedy and published by . This book was released on 2016 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the problem statement, the following objectives are to be achieved; to perform experimental tests and to study the performance of the VVAWT for three and four blades, with closed and open vane designs; to measure the electric power output from the three- and four-blade VVAWT models with open vanes, using transmission gear and electric generator attached to the designs; to perform numerical simulations of the VVAWT models (three and four blades) for different angular positions of the blades and upstream air flow velocities for (i) all vanes closed and (ii) movable vanes. Using CFD software, the coefficient of drag CD and the aerodynamic characteristics of the VVAWT (distribution of static pressure, velocity, and turbulent kinetic energy) will be predicted; to develop a mathematical model for torque calculation of the VVAWT under the effect of wind shadow for three- and four-blade VVAWT models with open vanes.

Download or read book Performance Numerical Simulation of a Wind Turbine with Variable Pitch Blades written by 鄭伊庭 and published by . This book was released on 2011 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wind Resource Assessment and Micro siting written by Matthew Huaiquan Zhang and published by John Wiley & Sons. This book was released on 2015-05-18 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers all the key areas of wind resource assessment technologies from an engineer’s perspective Focuses on wind analysis for wind plant siting, design and analysis Addresses all aspects from atmospheric boundary layer characteristics, to wind resource measurement systems, uncertainties in measurements, computations and analyses, to plant performance Covers the basics of atmospheric science through to turbine siting, turbine responses, and to environmental impacts Contents can be used for research purposes as well as a go-to reference guide, written from the perspective of a hands-on engineer Topic is of ongoing major international interest for its economic and environmental benefits

Download or read book Multiphysics of Wind Turbines in Extreme Loading Conditions written by Arash Soleiman Fallah and published by Academic Press. This book was released on 2024-01-26 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multiphysics of Wind Turbines in Extreme Loading Conditions addresses the extreme transient loading of wind turbines through a multiphysics modeling approach, notably by considering the dynamic effects and the nonlinearities of the physics involved in such situations. The book forms the basis for understanding multiphysic numerical simulations conducted on onshore and offshore wind turbines and subjected to extreme loading conditions, including storms, earthquakes, blasts, impacts, and tsunamis. The multiphysics approaches used in this book are explained in each chapter, with algorithms then turned into numerical codes to attain a realistic picture of the dynamic response in each scenario. With numerical methods and loading data explained, the complexity of potential problems encountered when extreme dynamic loads are discussed, along with loading types and their effects. The book fills a specific niche in wind power, namely extreme transient loading of wind turbine, offering information and industrial practices as wind energy makes it useful to practice engineers, designers, undergraduate and graduate students. Defines best practices for unique scenarios which are not readily available in the wider literature, such as extreme load conditions, earthquake and storm scenarios Includes multi-physics methods and specific applications within the demands of extreme conditions Offers numerical simulations of both onshore and offshore wind turbines in one place

Download or read book Stability Control and Reliable Performance of Wind Turbines written by Kenneth Eloghene Okedu and published by BoD – Books on Demand. This book was released on 2018-10-10 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is intended for academics and engineers working in universities, research institutes, and industry sectors wishing to acquire new information and enhance their knowledge of the current trends in wind turbine technology. Readers will gain new ideas and special experience with in-depth information about modeling, stability control, assessment, reliability, and future prospects of wind turbines. This book contains a number of problems and solutions that can be integrated into larger research findings and projects. The book enhances studies concerning the state of the art of wind turbines, modeling and intelligent control of wind turbines, power quality of wind turbines, robust controllers for wind turbines in cold weather, etc. The book also looks at recent developments in wind turbine supporting structures, noise reduction estimation methods, reliability and prospects of wind turbines, etc. As I enjoyed preparing this book, I am sure that it will be valuable for a large sector of readers.