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Computational Method for Aerodynamic and Aeromechanical Analysis of Offshore Wind Turbines.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Computational Method for Aerodynamic and Aeromechanical Analysis of Offshore Wind Turbines./
作者:	Win Naung, Shine.
面頁冊數:	1 online resource (205 pages)
附註:	Source: Dissertations Abstracts International, Volume: 83-09, Section: B.
Contained By:	Dissertations Abstracts International83-09B.
標題:	Fluid-structure interaction. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28960774click for full text (PQDT)
ISBN:	9798780648734

Computational Method for Aerodynamic and Aeromechanical Analysis of Offshore Wind Turbines.
Win Naung, Shine.

Computational Method for Aerodynamic and Aeromechanical Analysis of Offshore Wind Turbines. - 1 online resource (205 pages)

Source: Dissertations Abstracts International, Volume: 83-09, Section: B.

Thesis (Ph.D.)--University of Northumbria at Newcastle (United Kingdom), 2021.

Includes bibliographical references

Innovative wind power technologies have led to wind turbines with significantly longer and more flexible blade designs in order to meet the rise in green energy demands. A trend towards larger wind turbine sizes could potentially result in the blades experiencing aeroelastic instability problems. Furthermore, a typical wind farm is composed of multiple large-scale wind turbines, and therefore, the aerodynamics and aeroelasticity of a wind turbine can be influenced by various sources of flow unsteadiness generated by neighbouring wind turbines. The overall aim of this project is, therefore, to analyse the aerodynamics and aeroelasticity of wind turbines by taking various sources of flow unsteadiness into account using a high-fidelity computational method at an affordable computational cost. The computational resources and costs required for the aerodynamic and aeromechanical simulations of wind turbines using high-fidelity numerical methods are very high, which is the main challenge for the wind energy research community. Frequency domain methods, which are widely used in turbomachinery analysis but relatively new for wind turbines, are not only accurate but also computationally efficient for predictions of aerodynamic and aeroelasticity parameters. In this study, a nonlinear frequency domain solution method is proposed for the in-depth aerodynamic and aeromechanical analysis of wind turbines including multiple wind turbine models, taking numerous sources of flow unsteadiness into account. Various sources of flow unsteadiness, such as the harmonic inflow wakes, the oscillation of a blade structure, and the wake and turbulence from a neighbouring wind turbine are considered, and their effects on the aerodynamics and aeroelasticity of wind turbines are investigated. Different levels of modelling complexity are discussed in this thesis, including modelling and simulation of wind turbine blade aerofoils, rotor blades, complete wind turbine model including a tower, and multiple wind turbines in arrays. The frequency domain solution method makes it possible to model and simulate realistic flow conditions in consideration of the blade vibration as well as the effects of multiple wind turbines models without requiring significant computational resources. The present study reveals that the proposed nonlinear frequency domain solution method not only provides accurate predictions of aerodynamics and aeroelasticity of wind turbines but also reduces the computation time by one to two orders of magnitude compared to the conventional time domain methods.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798780648734Subjects--Topical Terms:

907285
Fluid-structure interaction.
Index Terms--Genre/Form:

542853
Electronic books.

Computational Method for Aerodynamic and Aeromechanical Analysis of Offshore Wind Turbines.
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245 1 0 $a Computational Method for Aerodynamic and Aeromechanical Analysis of Offshore Wind Turbines.
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500 $a Source: Dissertations Abstracts International, Volume: 83-09, Section: B.
500 $a Advisor: Rahmati, Mohammad; Farokhi, Hamed.
502 $a Thesis (Ph.D.)--University of Northumbria at Newcastle (United Kingdom), 2021.
504 $a Includes bibliographical references
520 $a Innovative wind power technologies have led to wind turbines with significantly longer and more flexible blade designs in order to meet the rise in green energy demands. A trend towards larger wind turbine sizes could potentially result in the blades experiencing aeroelastic instability problems. Furthermore, a typical wind farm is composed of multiple large-scale wind turbines, and therefore, the aerodynamics and aeroelasticity of a wind turbine can be influenced by various sources of flow unsteadiness generated by neighbouring wind turbines. The overall aim of this project is, therefore, to analyse the aerodynamics and aeroelasticity of wind turbines by taking various sources of flow unsteadiness into account using a high-fidelity computational method at an affordable computational cost. The computational resources and costs required for the aerodynamic and aeromechanical simulations of wind turbines using high-fidelity numerical methods are very high, which is the main challenge for the wind energy research community. Frequency domain methods, which are widely used in turbomachinery analysis but relatively new for wind turbines, are not only accurate but also computationally efficient for predictions of aerodynamic and aeroelasticity parameters. In this study, a nonlinear frequency domain solution method is proposed for the in-depth aerodynamic and aeromechanical analysis of wind turbines including multiple wind turbine models, taking numerous sources of flow unsteadiness into account. Various sources of flow unsteadiness, such as the harmonic inflow wakes, the oscillation of a blade structure, and the wake and turbulence from a neighbouring wind turbine are considered, and their effects on the aerodynamics and aeroelasticity of wind turbines are investigated. Different levels of modelling complexity are discussed in this thesis, including modelling and simulation of wind turbine blade aerofoils, rotor blades, complete wind turbine model including a tower, and multiple wind turbines in arrays. The frequency domain solution method makes it possible to model and simulate realistic flow conditions in consideration of the blade vibration as well as the effects of multiple wind turbines models without requiring significant computational resources. The present study reveals that the proposed nonlinear frequency domain solution method not only provides accurate predictions of aerodynamics and aeroelasticity of wind turbines but also reduces the computation time by one to two orders of magnitude compared to the conventional time domain methods.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
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650 4 $a Pressure distribution. $3 3564852
650 4 $a Energy resources. $3 3561090
650 4 $a Offshore. $3 3681420
650 4 $a Flow control. $3 3681437
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