Browsing University of Galway Theses (PhD Theses) by Author "Leen, Sean"
Now showing items 1-9 of 9
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Characterisation of rotationally moulded polymer liners for low permeability cryogenic applications in composite overwrapped pressure vessels
Murray, Brendan R. (2016-09-20)Composite overwrapped pressure vessels (COPVs) have become a critical component in satellite and space applications due to their ability to store highly permeating fuels at high pressures and under cryogenic conditions. ... -
Design of fibre-reinforced polymer composite blades for wind and tidal turbines
Fagan, Edward (2017-09)There is substantial opportunity in the development of wind and tidal current turbines to help decarbonise national energy systems and to expand the economic potential of the European Union. However, well-documented cases ... -
Design, analysis and testing of a spiral blade vertical-axis tidal turbine
Heavey, Shane (NUI Galway, 2021-05-04)The aim of this thesis is to develop a combined analytical, computational and experimental methodology for characterisation and optimisation of the hydrodynamic performance of a novel vertical-axis tidal turbine concept. ... -
An experimental and computational investigation of the high temperature behaviour of MarBN steel with application to effects of manufacturing
O'Hara, Eimear Marie (NUI Galway, 2018-10-30)The key step for next generation power plants is the development of advanced materials capable of achieving high flexibility and efficiency at increased steam temperatures and pressures. Such operating conditions will cause ... -
Experimental and numerical characterisation of materials for biomass co-firing
O'Hagan, Conor (2017-02-23)As Europe continues to decarbonize its electricity generation capacity, operators of thermal power plants face challenges to which they must adapt including increasingly transient operation and co-firing with biomass. This ... -
Experimental characterisation, computational modelling and design tool development for fretting fatigue and wear in flexible marine risers
O'Halloran, Sinéad (2017-09-25)Fretting is a key concern in the fatigue design of the pressure armour layer of flexible marine risers, due to the combination of extreme global dynamic loading conditions and the local geometrical-tribological conditions ... -
Macro- and micro-scale modelling of material inhomogeneity for the premature failure of welded 9Cr steels in power plants
Li, Ming (NUI Galway, 2019-02-15)Chromium-molybdenum steel pipe (9Cr-1Mo steel) is an important high temperature construction material for welded steam piping networks in gas-fired power plants. A major global problem of such materials is the premature ... -
Micromechanical modelling of size effects in crack initiation with application to fretting fatigue and cold dwell fatigue
Ashton, Patrick (NUI Galway, 2018-12-19)This thesis presents the development of a micromechanical computational framework for microstructure sensitivity of crack initiation in metals, with application to fretting fatigue and cold-dwell facet fatigue. It is ... -
Through-process characterisation for welding, microstructure evolution and constitutive response of 9Cr steel material for flexible power plant operation
Mac Ardghail, Padraig (NUI Galway, 2020-05-06)This thesis presents a combined experimental and computational characterisation programme of work for development of a through-process modelling methodology for the welding, post-weld heat treatment and in-service performance ...