Global ETD Search
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Showing 1 to 12 of 12 for “"Turbine Wake"”.
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Computational modeling of wind turbine wake interactions
… computational modeling and understanding of wind turbine aerodynamics and wake interactions. The following thesis work looks to study turbulence closure methods widely used in computational fluid dynamics (CFD) and their applicability for modeling wind turbine aerodynamics. The first investigation …
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Dynamic wind turbine wake trajectory control: Strategies and real-time validation
… power production enhancements using yaw-based wake steering. However, slower yaw actuation rates compared to inflow change rate cause time-varying downstream-rotor-wake overlap conditions, diminishing its benefits. To accommodate for inflow variations, closed-loop wake control can be an …
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Computational Fluid Dynamics (CFD) modelling of renewable energy turbine wake interactions
… Fluid Dynamics (CFD) simulations of renewable turbines akin to those used for wind, hydro, and tidal applications. The models developed took the form of actuator discs with the solution of incompressible Reynolds-Averaged Navier-Stokes equations with the k-ω SST turbulence models. Simulations …
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Experimental and theoretical study of horizontal-axis wind turbines
… and theoretical study of horizontal-axis wind turbines is undertaken. The theoretical analyses cover the four major areas of aerodynamics, turbulence. aeroelasticity and blade optimisation. EXisting aerodynamic theories based on blade-element theory for predicting the loads on a wind turbine …
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The effect of dynamic operation and incoming flow on the wake of a utility-scale wind turbine
Wind turbine wakes, the regions of slower and more turbulent air behind turbines, lead to power losses up to 40% and increased structural loading on downwind turbines within a wind farm. To mitigate these detrimental effects, improved understanding of wake behavior is required. However, modeling …
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The Effect of Blade Aeroelasticity and Turbine Parameters on Wind Turbine Noise
… well as the number and size of commercial wind turbines. These large turbines are loud and can cause annoyance to nearby communities. Therefore, the prediction of large wind turbine noise over long distances is critical. The wind turbine noise prediction is a very complex problem since it has to …
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Optimization of Wind Turbine Airfoils/Blades and Wind Farm Layouts
… is widely used in the design of wind turbine blades. In this dissertation, a numerical optimization method called Genetic Algorithm (GA) is applied to address the shape optimization of wind turbine airfoils and blades. In recent years, the airfoil sections with blunt trailing edge …
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Development of an experimental framework for hydrodynamic characterization of hydrokinetic turbines in laboratory facilities
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-02-04 without embargo terms
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Improving the accessibility of in-stream water wheels
… variables can improve the efficiency of the turbine without increasing its capital cost. An experimental investigation found that, typically, increasing the blade depth ratio increases the power output, but high blade depth ratios may create significant regions of negative torque across the …
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Caracterización numérica de la turbulencia en el estela de una aeroturbina mediante un modelo de simulación de grandes escalas
… datos experimentales de este tipo. ABSTRACT Wind turbine wakes are an interesting topic of study. Velocity defects and the increase of turbulence generated by the turbines in a wind farm usually cause a reduction in power generation and unsteady loads over other machines. In wind farms where, …
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Optimized design of aerodynamic airfolis for vertical axis wind turbines
… their higher energy output, horizontal-axis wind turbines have been traditionally the preferred option. Nevertheless, vertical-axis wind turbines are becoming relevant, specially in urban areas. Their advantages evidence the need of further research to overcome the main drawbacks that prevent …
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Unsteady separation control on wind turbine blades
… of the primary causes of unsteady loads on wind turbine blades. The process can be instigated by a multitude of factors, common in wind turbine operating environments, such as inflow turbulence, wind gusts and sustained yaw misalignment. The unsteady separation due to dynamic stall can lead to …