Abstract
Offshore wind turbines are becoming increasingly popular due to their higher wind energy harnessing capabilities and lower visual pollution. Researchers around the globe have been reporting significant scientific advancements in offshore wind turbines technology, addressing key issues, such as aerodynamic characteristics of turbine blades, dynamic response of the turbine, structural integrity of the turbine foundation, design of the mooring cables, ground scouring and cost modelling for commercial viability. These investigations range from component-level design and analysis to system-level response and optimization using a multitude of analytical, empirical and numerical techniques. With such wide-ranging studies available in the public domain, there is a need to carry out an extensive yet critical literature review on the recent advancements in offshore wind turbine technology. Offshore wind turbine blades’ aerodynamics and the structural integrity of offshore wind turbines are of particular importance, which can lead towards system’s optimal design and operation, leading to reduced maintenance costs. Thus, in this study, our focus is to highlight key knowledge gaps in the scientific investigations on offshore wind turbines’ aerodynamic and structural response. It is envisaged that this study will pave the way for future concentrated efforts in better understanding the complex behavior of these machines.
Highlights
Received: 25 October 2021Offshore wind turbines offer significant benefits over onshore wind turbines
Most commercial offshore wind turbines are horizontal-axis 3-bladed upwind machines, where the above-sea-level components include torque generating blades connected to the hub, which is an integral part of the nacelle
The linear frequency domain technique neglects the key effects related to inherent nonlinear rigid-body and flow dynamics of floating structures and the coupled aerodynamics-hydrodynamic performance of floating offshore wind turbines [10,52]
Summary
Offshore wind turbines offer significant benefits over onshore wind turbines. One of the key benefits offshore wind turbines offer is their comparatively bigger size, which translates into lower cost of power generation. Have floating support structures, which are connected to seabed the seabed through mooring caFurther classification of offshore wind turbines is shownisin. It canthat be there seen are two types of fixed-support offshore turbines operation commercially, i.e., monopile that there are two types of fixed-support offshoreinturbines in operation commercially, i.e., and jacket. Most of the commercially offshore wind turbines in the worldwind (currently) have fixed-support structures [2].fixed-supHowever, installed and operational offshore turbines in the world (currently) have there are some significant issues with this technology. The watch circle avoids wind turbine blades experiencing extreme wind loads, which are potentially structurally damaging This introduces another complexity for the mooring cables, i.e., they need to be flexible enough to compensate for the movement of the floating platform [3]. [1]. [1]
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