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Corrosion–Fatigue Coupling in Offshore Wind Turbines: The Silent Driver of Structural Risk
Author: Bilgehan, Hakan; and Avadar, LauraBilgehan, Hakan; and Avadar, Laura | Technology
Offshore wind turbines operate in one of the most aggressive engineered environments on Earth. Unlike onshore structures dominated primarily by mechanical fatigue, offshore turbines face a persistent electrochemical attack that fundamentally alters how fatigue damage accumulates. Corrosion and fatigue are not independent degradation modes; they are coupled processes that interact at the microstructural level and accelerate structural aging in ways that classical design models often underestimate. As offshore wind farms move into deeper waters, adopt larger monopiles, and target 25–35 . . .
More »Theoretical upper limit for offshore wind energy extraction
Author: Simão Ferreira, Carlos; Larsen, Gunner; and Nørkær Sørensen, Jens | EUROPE, Technology
[Abstract] Offshore wind energy is key to energy transition, but its true potential is often overstated. As wind farms become larger and denser, they change the atmospheric boundary layer, reaching up to the strong geostrophic winds a few kilometers above the surface. Energy extraction depends on the vertical transfer of momentum from these high-altitude winds down to the turbines, which sets a physical ceiling on how much energy can harvested. A closed-form analytical model, validated against more than 420 years . . .
More »Wind energy is not sustainable when balanced by fossil energy
Author: Emblemsvåg, Jan | Emissions, Grid, Ireland, Technology
Highlights: Life-cycle analyses of wind in grids have many significant shortcomings today. Wind displaces far less emissions than typically assessed today. Wind does reduce emissions but insufficiently to qualify as sustainable. Policy must focus on developing low carbon dispatchable energy sources. Policy must focus on systemic sustainability and less on renewable energy per se. Abstract: Ensuring access to affordable, reliable, sustainable and modern energy for all is one of the Sustainable Development Goals. Some countries have therefore invested significantly in . . .
More »Efficient finite difference modeling of infrasound propagation in realistic 3D domains: Validation with wind turbine measurements
Author: Mattsson, Ken; Eriksson, Gustav; Persson, Leif; Chilo, José; and Tatar, Kourosh | Noise, Sweden, Technology
ABSTRACT: We present a high-fidelity simulation tool for accurate acoustic modeling across a wide range of applications. The numerical method is based on diagonal-norm Summation-By-Parts (SBP) finite-difference operators, which guarantee linear stability on piecewise curvilinear multi-block grids. Realistic three-dimensional atmospheric and topographic data are directly incorporated into the simulations, and the solver is implemented in CUDA to achieve high computational efficiency. Verification is performed through convergence studies against highly resolved benchmark problems in both two and three spatial dimensions, while . . .
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