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 7 of 7 for “"Surface waviness"”.
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Characterization and mitigation of blade waviness effects on fan performance
The role of surface waviness, arising from carbon composite manufacturing process, on aeroengine fan blade performance is characterized. The mechanisms for laminar-turbulent transition are assessed numerically and experimentally over relevant range of aerodynamic and geometric parameters. The …
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Development and application of transition detection using infrared thermography for characterization of fan blade waviness effects
… a natural transition experiment on flat and wavy surfaces. The approach relies on computing the convective heat transfer coefficient field on the test surface and inferring transition region from the same. The transition location identified from infrared images is assessed against hotwire …
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Methods of improving the surface flatness of thin glass sheets and silicon wafers
… with manufacturing larger sheets is their surface waviness. The sheets have large warps, on the order of hundreds of microns, that present many challenges in all the industries utilizing such sheets, especially in the liquid crystal display and precision optics industries. The thinner the …
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Improving surface quality of SLA 3D printed parts via controlled dip-coating
… is often chosen for its relatively high quality surface finish. However, the average surface roughness of SLA 3D printed parts is in the range of 0.4 to 2 [mu], which is relatively rough compared to that of polishing/finishing processes, typically 0.1 to 0.4 gm. Therefore, the objective of this …
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Modelling and simulation in tribology of complex interfaces
Tribology is known as the science of surfaces in relative motion and involves complex interactions over multiple length and time scales. Therefore, friction, lubrication and wear of materials are intrinsically highly multiphysics and multiscale phenomena. Several modelling and simulation tools have …
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Flexural Stiffnesses of and Dimensional Stability in Circular Quasi-isotropic Laminate Mirrors
… buffer layers on composite mirrors for high surface smoothness. In this dissertation document, radial stiffness associated with stacking sequence effects in quasi-isotropic laminates (pi/n, where n=3, 4, and 6) and dimensional stability in the composite laminates are investigated numerically. …
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Effects of micro- and nano-scale surface geometry on behaviors of live cells and liquid droplets
As the scale of the surface texture responsible for superhydrophobicity becomes similar to the size of a droplet, simple models based on homogeneity assumptions begin to break down. In order to better understand these discrete phenomena, we first create a unique model with the finite element …