Article
Green & Sustainable Science & Technology
Daniel Micallef, Abdolrahim Rezaeiha
Summary: Over the past decade, there has been a steady increase in scientific articles on rotor aerodynamics of offshore wind turbines, highlighting the critical role of aerodynamics in overcoming specific barriers in multi-physics systems. Current trends in research focus on the interaction between aerodynamics and other fields, such as platform hydrodynamics and control, with common approaches being coupled or uncoupled studies. The literature mainly addresses isolated floating turbines, while studies on interactions between floating turbines are limited.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Thermodynamics
Yefeng Cai, Haisheng Zhao, Xin Li, Yuanchuan Liu
Summary: This paper proposes a reliable criterion based on the velocity field of FOWT to distinguish its operating states (VRS or PWS) and considers the aerodynamic characteristics and flow mechanism of the FOWT in detail.
Article
Green & Sustainable Science & Technology
Jing Dong, Axelle Vire
Summary: This study aims to predict the occurrence of the vortex ring state (VRS) during the operation of floating offshore wind turbines, and the results show that VRS may occur for a wide range of operating conditions. The most suitable criterion for VRS prediction is found to be Wolkovitch's criterion.
Article
Green & Sustainable Science & Technology
Jing Dong, Axelle Vire, Zhangrui Li
Summary: This paper conducts a comparative analysis and evaluation of the vortex ring state (VRS) phenomenon and aerodynamic performance of a floating offshore wind turbine (FOWT), and compares the results with other similar studies, providing a deeper understanding of the working state changes of FOWTs.
Review
Energy & Fuels
Srikanth Bashetty, Selahattin Ozcelik
Summary: This paper provides a literature review on the dynamics of offshore floating wind turbine platforms, highlighting the historical developments, challenges, and potential solutions for harnessing offshore wind energy. Various types of floating platforms and their relative advantages and disadvantages are discussed, along with recommendations for future research directions.
Review
Engineering, Marine
Decao Yin, Elizabeth Passano, Fengjian Jiang, Halvor Lie, Jie Wu, Naiquan Ye, Svein Saevik, Bernt J. Leira
Summary: This study conducted a state-of-the-art review on influential VIM research, focusing on engineering practice, model tests, numerical calculation, and field measurement. Engineering gaps and potential research topics were identified for future work.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Gabriela Grasu, Pengfei Liu
Summary: Floating Offshore Wind has the potential to provide an effective solution for the increasing energy demand of coastal communities around the world if the specific risks associated with this novel technology are understood and evaluated.
Article
Green & Sustainable Science & Technology
Alireza Arabgolarcheh, Sahar Jannesarahmadi, Ernesto Benini
Summary: This paper aims to implement a computationally-efficient approach based on a Computational Fluid Dynamics (CFD) method to describe the aerodynamics of floating offshore wind turbines (FOWTs) using an actuator line model (ALM). The results showed that this method can achieve reasonable accuracy with lower computational cost and preprocessing time, and can capture the effects of platform motion on wake evolution.
Article
Green & Sustainable Science & Technology
Ziwen Chen, Xiaodong Wang, Yize Guo, Shun Kang
Summary: This study investigates the aerodynamic characteristics of floating offshore wind turbines under different motions using computational fluid dynamics simulations. It is found that increasing amplitude and frequency can aggravate the fluctuation of the overall aerodynamic performance of wind turbines. Additionally, complex platform motions adversely affect the power generation of floating offshore wind turbines.
Article
Green & Sustainable Science & Technology
Kamran Ali Shah, Fantai Meng, Ye Li, Ryozo Nagamune, Yarong Zhou, Zhengru Ren, Zhiyu Jiang
Summary: Over the past decade, offshore wind energy development has shifted towards deeper waters, leading to the use of floating offshore wind turbines instead of traditional bottom-fixed turbines. However, the high cost of floating offshore wind turbines can be attributed to the inadequate adaptation of system dynamics control methods, affecting performance and reliability. Various control methods are systematically analyzed, with emphasis on wind and wave forecasting, to improve power maximization, regulation, and load mitigation in floating offshore wind turbine systems.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Engineering, Marine
Thiago S. Hallak, C. Guedes Soares, Oscar Sainz, Sergio Hernandez, Alfonso Arevalo
Summary: The WIND-bos spar Floating Offshore Wind Turbine has been studied experimentally and numerically, and the results have shown a good motion performance of the novel concept. The importance of damping calibration and the consideration of nonlinear damping force in the numerical model are highlighted.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Marine
L. S. P. Da Silva, M. De Oliveira, B. Cazzolato, N. Sergiienko, G. A. Amaral, B. Ding
Summary: This paper investigates the stochastic nonlinear dynamics of a floating offshore wind turbine (FOWT) in the frequency-domain under irregular waves and turbulent winds. The main sources of nonlinearities are estimated using statistical linearisation, which provide reliable estimates of the response by using nonlinear mooring model and nonlinear aerodynamic loads model.
Article
Energy & Fuels
Yuanchuan Liu, Dunjie Ge, Xinglan Bai, Liang Li
Summary: This paper numerically studies the vortex-induced motion (VIM) of the OC4 semi-submersible floating offshore wind turbine platform under different flow velocities. The effect of current incidence angle on platform VIM is analyzed. Results show that the lock-in phenomenon is present and the transverse response amplitude is large until V-r = 30. The transverse response amplitude for cases with the incidence angle of 180 degrees is generally smaller and has a narrower lock-in regime compared to the other two incidence scenarios. Flow field visualization reveals the interaction between upstream vortices and the downstream column when the incidence angle is 180 degrees, impacting the vortex shedding process and fluid forces of the downstream column.
Article
Engineering, Civil
Wonsuk Han, Homin Kim, Eunkuk Son, Soogab Lee
Summary: This study investigates the impact of wake steering on wind turbines using the unsteady vortex lattice method (UVLM) and the curled wake model. The results show that the counter-rotating vortices significantly affect the aerodynamics of wind turbines, including the effective angle of attack and wake deflection.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2023)
Article
Mechanics
Xiangheng Feng, Jiangyuan Fang, Yonggang Lin, Bowen Chen, Danyang Li, Hongwei Liu, Yajing Gu
Summary: In this study, a fully coupled and highly elaborated model based on computational fluid dynamics with the dynamic fluid body interaction method was established. The blade pitch motion was regulated through a user-defined function. Dynamic simulations of the full-configuration floating wind turbine system were performed in power production, shutdown, and startup cases. The results showed that the blade pitch motion decreased the aerodynamic loads and amplified the platform response amplitude, while extreme motion responses and mooring line tension oscillations were observed in shutdown and startup cases.
Article
Energy & Fuels
Luis A. Martinez-Tossas, Philip Sakievich, Matthew J. Churchfield, Charles Meneveau
Summary: This work revisits the filtered lifting line theory and provides a more general formulation for solving flow problems with significant changes in chord, such as wind turbine blades.