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" Deniz üstü yüzer rüzgar türbinlerinin sayısal modelleme ıle incelenmesi ve yeni bir yüzer platformun geliştirilmesi "
Alkarem, Yüksel
Özbahçeci, Bergüzar
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Latin Dissertation
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| Language of Document
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English
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| Record Number
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1112199
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| Doc. No
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TLpq2522625098
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| Main Entry
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Alkarem, Yüksel
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Özbahçeci, Bergüzar
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| Title & Author
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Deniz üstü yüzer rüzgar türbinlerinin sayısal modelleme ıle incelenmesi ve yeni bir yüzer platformun geliştirilmesi\ Alkarem, YükselÖzbahçeci, Bergüzar
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| College
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Izmir Institute of Technology (Turkey)
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| Date
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2020
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| student score
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2020
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| Degree
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Master's
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| Page No
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166
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| Abstract
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Harvesting offshore wind energy has been a primary stimulus for research recently as more shreds of evidence show the highly unexploited potential it carries. As water depth increases, fixed-bottom foundations become impractical and floating solutions must be adopted for offshore wind turbines. The underlying causes of high demands to reach accurate numerical simulation of floating offshore wind turbines are a plethora. The system's nonlinearities impose a serious challenge on the estimation of system responses, power production, and fatigue loading. Proper simulation of environmental stochastic loading from wind and wave plays a critical role in the analysis of such systems. The floating platforms govern the integrity of the entire system. There are different kinds of existing platforms like semi-submersible, spar, tension leg, etc. However, attempts to reduce hydrodynamic and aerodynamic-induced mean and dynamic excitations continue. This study examines the performance of a semi-submersible platform numerically using a hydro-aero coupled model and compares the results with the benchmark experimental data and other numerical model studies. A comparative study shows the present model depending on the second-order potential theory, and the dynamics of the mooring cables agrees well with the experimental results. A spar type platform is also modeled for mid-depth conditions. Moreover, a novel floating platform is developed and compared to existing alternatives in the field. The proposed platform achieves better stability in terms of mean offsets and dynamic oscillations, especially in pitch at extreme conditions. Another extinct feature of the design is the diminished tensile strain in the mooring lines for a relatively shorter cable length and equal linearized horizontal stiffness.
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Alternative energy
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Flow velocity
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Fluid-structure interaction
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Fourier transforms
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Turbines
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Wind power
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