Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 56 for “"wind turbine blades"”.
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Unsteady separation control on wind turbine blades
… one 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 …
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Reducing the Environmental Impact of Wind Turbine Blades
Wind energy, one of the most promising sources of clean energy, has developed rapidly over the last two decades. Wind turbines (WT) are arguably clean during operation, offering minimal pollution and zero CO2 emissions, but significant amounts of energy are used and CO2 emitted during their …
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Prediction of Aerodynamic Noise Generated By Wind Turbine Blades
… of mitigating the aerodynamic noise generated by wind turbine blades involves accurate prediction of aerodynamic noise generated by a wind turbine rotor which can be used a basis for comparison. The NREL Phase VI HAWT rotor has been chosen to perform this study. This is achieved by first …
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Impedance-Based Structural Health Monitoring of Wind Turbine Blades
Wind power is a fast-growing source of non-polluting, renewable energy with vast potential. However, current wind technology must be improved before the potential of wind power can be fully realized. One of the key components in improving wind turbines is their blades. Blade failure is very costly …
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Passive aeroelastic tailoring of wind turbine blades : a numerical analysis
… impact towards a sustainable energy supply. In wind power generation losses occur at tip speed ratios which the rotor was not designed for. Since the ideal blade shape changes nonlinearly with rising wind speeds currently used pitch control mechanisms can only approach the ideal blade …
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Mechanical Characterization Of Composite Repairs For Fiber-Glass Wind Turbine Blades
<p>While in service, wind turbine blades experience various modes of loading. An example is impact loading in the form of hail or bird strikes, which might lead to localized damage or formation of cracks a few plies deep on the blade surface. One of the methods to conduct repairs on wind turbine …
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The prediction of unsteady three-dimensional aerodynamics on wind turbine blades
… the main features of the aerodynamics of wind turbines, a review of key theoretical studies and aerodynamic modelling methods provides the opportunity to focus on predictive methods and the main technical challenges associated with the aerodynamics of HAWTs. The basic aerodynamic method …
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Aerodynamic design and analysis of small horizontal axis wind turbine blades
The exploitation of small horizontal axis wind turbines provides a clean, prospective and viable option for energy supply. Although great progress has been achieved in the wind energy sector, there is still potential space to reduce the cost and improve the performance of small wind turbines. An …
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Development of an Electromagnetic Energy Harvester for Monitoring Wind Turbine Blades
Wind turbine blades experience tremendous stresses while in operation. Failure of a blade can damage other components or other wind turbines. This research focuses on developing an electromagnetic energy harvester for powering structural health monitoring (SHM) equipment inside a turbine blade. The …
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Capability of Zambian industries to manufacture grid-scale wind turbine blades and towers.
… has led to the inception of grid-scale wind power feasibility studies at ten sites distributed around the country. These feasibility studies were aimed at establishing the availability of the wind resource for grid-scale power generation. This will lead to the development of the wind …
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Recycling of glass fibre reinforced polymer composite wind turbine blades in South Africa
With the increasing number of wind energy facilities (WEFs) being constructed in South Africa, largely supported by South Africa’s Renewable Energy Independent Power Producers Procurement Program (REIPPPP), there is a growing need to identify feasible disposal pathways for decommissioned wind …
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Valorisation of wind turbine blades into concrete : a contribution towards a more sustainable approach
The development of wind energy in the last decades led to the massive construction of wind turbines throughout the world. With 20 years of project service life, today older turbines are at the end of their service lifecycle. While the large part of wind turbine is recyclable, no valorisation of …
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The Development of a Phase Locked Excitation Testing Method for Full‐Scale Wind Turbine Blades
… designed to assess the structural health of the turbine blade as well as simulate a lifespan worth of damage in a laboratory environment. These tests also provide a further understanding of the dynamics involved in modern turbine blades. Blade tests are typically conducted in one of the following …
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Performance Evaluation of Wind Turbine Blades using Blade Element Momentum Theory and Flow Simulation Techniques
… performed to evaluate the performance of two wind turbine blades. The first study consisted of a computational flow simulation conducted to predict underperformance of a stall regulated wind turbine rotor. A hypothesis was proposed explaining the causes for the underperformance of an 8kW stall …
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