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 10 of 10 for “"Marine Propulsion"”.
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The Design of Reactor Cores for Civil Nuclear Marine Propulsion
… nuclear power plants has been in nuclear naval propulsion, particularly submarines. This accumulated experience may become the basis of a proposed new generation of compact nuclear power plant designs. In an effort to de-carbonise commercial freight shipping, there is growing interest in the …
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Numerically-based ducted propeller design using vortex lattice lifting line theory
… Ducted propellers are prevalent in modem marine propulsion systems, and the application of this technology continues to expand. The theory associated with ducted propellers applies to a wide-range of devices which include azimuth thrusters, pumpjets, and tidal turbines. Regardless of the …
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Magnetohydrodynamic Induction Pump Jet Propuslor for Undersea Vehicles
… Magnetohydrodynamic (MHD) technology for use in marine propulsion for over 60 years, but progress been limited due to the inability to create strong enough magnetic fields (> 5T). The Defense Advanced Research Projects Agency (DARPA), Defense Sciences Office (DSO), recently released a Broad …
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Cryogenic characteristics of IGBTs
… for example superconducting windings for marine propulsion motors, superconducting fault current limiters and superconducting magnet energy storage (SMES). Many of these applications also require power electronics, and it is therefore timely to consider the possibility of locating the …
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Bragg reflector geometries for colorimetric orientation and deformation sensing
Propulsion systems of commercial and naval ships are typically large and expensive. They must be kept well-aligned and free of corrosion to efficiently and reliably transfer torque to a ship's propeller. Early identification of misalignment or surface corrosion is therefore crucial, making an …
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The Hydrodynamics and Energetics of Bioinspired Swimming with Undulatory Electromechanical Fins
… to many engineering applications, including marine propulsion. It is of interest to determine how fish interact with the water around them, and how best to utilize the potential their methods offer. A stingray-like fin was chosen for analysis due to the maneuverability and versatility of …
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Experimental investigation of semiconductor losses in cryogenic DC-DC converters
… and superconducting rotary machines for marine propulsion, it is timely to consider the possibility of integrating the associated control equipment into the cryostat with the superconductor. This may bring benefits in terms of the performance of the power electronics or may enable other …
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Design and Analysis of Low Reynolds Number Marine Propellers with Computational Fluid Dynamics (CFD) Transition Modeling
Small-scale marine propellers operate at low Reynolds numbers, where laminar-turbulent transition of the boundary layer can impact the distributions of pressure and shear stress on the blade surface. Marine propellers operating at low Reynolds numbers are subject to laminar-turbulent transition of …
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A comparison study of biologically inspired propulsion systems for an autonomous underwater vehicle
… factor to this is the efficiency of the propulsion system, which is usually based on marine propellers. As fish are highly efficient swimmers greater propulsive efficiency may be possible by mimicking their fish tail propulsion system. The main concept behind this work was therefore to …