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 615 for “"blades"”.
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Fatigue cracking of lumber bandsaw blades
… in the tooth gullet region of wide handsaw blades used in the lumber industry. This thesis presents both the theory and the experiment aspects of this research in terms of the tasks defined as follows. The current literature was reviewed to critically examine the current state-of-the-art in …
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Corrosion studies of stainless steel blades
Corrosion is a subject of interest to interdisciplinary research communities that includes fields of materials science, chemistry, physics, metallurgy and chemical engineering. In order to understand the mechanisms of corrosion and the function of corrosion inhibitors, the reactions at the …
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Robust design methodologies: application to compressor blades
Compressor blades are subtle aerodynamic shapes designed after years of research and insight. They inevitably show deviations from their desired shapes due to manufacturing errors, erosion or foreign object damage. In the present study we focus on seeking compressor blade geometries, that are …
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Unsteady separation control on wind turbine blades
… 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 excessive …
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Robust design and tolerancing of compressor blades
Variations in the geometry of compressor blades can be introduced by variability in the manufacturing process or by in-service erosion. Recent research efforts have focused on characterizing the impacts of this geometric variability on turbomachinery performance and designing blade geometries whose …
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Adaptive Composite Blades for Horizontal Axis Tidal Turbines
… devices more efficient and economic.<br/>The blades of a HATT are the source of energy extraction for the device and are required to operate in a harsh subsea environment for a long (20 year) life cycle with minimal need for maintenance. Choice of an appropriate foil section for the blade is …
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Reducing the Environmental Impact of Wind Turbine Blades
… problematic at end-of-life (EoL), especially the blades. WT blades are mainly made with composite materials comprising thermosetting resin and glass fibre. They are lightweight and strong but problematic to recycle. Large volumes of waste will be generated when these WT blades are decommissioned …
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Manufacturing Variability in High Pressure Turbine Rotor Blades
… the ability to process the measurements of real blades. Structured-light scanning was used measure the manufactured blades and geometry processing scripts were developed to extract the manufacturing variability once the blades were aligned to the design-intent coordinate system. The extracted …
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Probabilistic performance-based geometric tolerancing of compressor blades
… so as to maximize the quality of the accepted blades. Optimization is performed at several performance limits to observe how the effectiveness of tolerances and the best geometric discriminators of performance change with performance limit. A set of compressor blade data is used consisting of …
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Lift and drag characteristics of rotating oar blades
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1993.
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Aerodynamic performance evaluation of multi inner blades savonius rotor
… of the Savonius wind turbine rotor with inner blades was investigated. The effect of number of inner blades, angle of inner blades, position of inner blades, and distance between the inner blades were evaluated under low and normal ranges of Tip Speed Ratio (TSR) through simulation and …
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Prediction of Aerodynamic Noise Generated By Wind Turbine Blades
… 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 predicting the three …
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Nonlinear aeroelastic modelling of large wind turbine composite blades
… size and flexibility of large wind turbine blades introduces significant aeroelastic effects, which are caused by fluid-structure interaction. These effects might result in aeroelastic instability problems, such as edgewise instability and flutter, which can be devastating to the blades and …
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