Robust adaptive reference model control of nonlinear wind-induced oscillations of floating offshore wind turbine blade in finite-time

Targeted at the phenomenon of offshore wind turbine blades cracking and tearing up, the corrosion mechanism on offshore wind turbine blade in salt fog environment is researched. By means of analyzing the blades structural damage and the corrosion in salt fog environment, the main damage forms of the blades can be summed up with a further view to discussing and analyzing the corrosion mechanism on offshore wind turbine blade in salt fog environment from the perspective of both physical and chemical corrosion. A final conclusion is reached which shows that the pitted surface of the blade developed from the pumping and milling of sand blown by wind is the incentive and hydrone diffusion and ultraviolet radiation are the main factors that lead to the aging of materials and corrosion of blades.

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Numerical modeling and analysis of the dynamic motion response of an offshore wind turbine blade during installation by a jack-up crane vessel

Ocean Engineering ◽

10.1016/j.oceaneng.2018.07.049 ◽

2018 ◽

Vol 165 ◽

pp. 353-364 ◽

Cited By ~ 6

Author(s):

Yuna Zhao ◽

Zhengshun Cheng ◽

Peter Christian Sandvik ◽

Zhen Gao ◽

Torgeir Moan ◽

...

Keyword(s):

Numerical Modeling ◽

Wind Turbine ◽

Turbine Blade ◽

Wind Turbine Blade ◽

Offshore Wind ◽

Offshore Wind Turbine ◽

Modeling And Analysis ◽

Motion Response ◽

Dynamic Motion ◽

Jack Up

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A numerical investigation of the effects of ice accretion on the aerodynamic and structural behavior of offshore wind turbine blade

Wind Engineering ◽

10.1177/0309524x20983220 ◽

2020 ◽

pp. 0309524X2098322

Author(s):

Oumnia Lagdani ◽

Mostapha Tarfaoui ◽

Mourad Nachtane ◽

Mourad Trihi ◽

Houda Laaouidi

Keyword(s):

Wind Turbine ◽

Turbine Blade ◽

Wind Turbines ◽

Failure Modes ◽

Leading Edge ◽

Wind Turbine Blade ◽

Cold Climate ◽

Offshore Wind ◽

Structural Behavior ◽

Offshore Wind Turbine

In recent years, several wind turbines have been installed in cold climate sites and are menaced by the icing phenomenon. This article focuses on two parts: the study of the aerodynamic and structural performances of wind turbines subject to atmospheric icing. Firstly, the aerodynamic analysis of NACA 4412 airfoil was obtained using QBlade software for a clean and iced profile. Finite element method (FEM) was employed using ABAQUS software to simulate the structural behavior of a wind turbine blade with 100 mm ice thickness. A comparative study of two composite materials and two blade positions were considered in this section. Hashin criterion was chosen to identify the failure modes and determine the most sensitive areas of the structure. It has been found that the aerodynamic and structural performance of the turbine were degraded when ice accumulated on the leading edge of the blade and changed the shape of its profile.

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Modeling and Investigation of Blade Trailing Edge of Vertical Axis Offshore Wind Turbine

Sustainability ◽

10.3390/su131910905 ◽

2021 ◽

Vol 13 (19) ◽

pp. 10905

Author(s):

Lin Pan ◽

Ze Zhu ◽

Zhaoyang Shi ◽

Leichong Wang

Keyword(s):

Wind Turbine ◽

Turbine Blade ◽

Capture Rate ◽

Vertical Axis ◽

Wind Turbine Blade ◽

Offshore Wind ◽

Offshore Wind Turbine ◽

Trailing Edge ◽

Structure Changes ◽

Trailing Edge Flaps

In this study, the structure of the trailing edge of the vertical axis offshore wind turbine blade is modified. First, according to the method of parameterization, the offshore wind turbine model is established, and a series of characteristics of the offshore wind turbine are obtained. Second, we add flaps with different lengths to the trailing edge of NACA0021 airfoil to obtain different dynamic characteristics. The angle of the additional trailing edge flaps is modified. Finally, a simulation model for the modified airfoil of the vertical axis offshore wind turbine is reestablished, and the variable characteristics of the performance is studied. Through the optimization and analysis of the blade structure, this study has obtained the best parameters of the length and angle of the offshore wind turbine blade trailing edge flap. The optimization of the blade structure changes the flow field around the blade, which significantly improves the maximum wind energy capture rate and self-starting ability of the vertical axis offshore wind turbine.

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