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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 77 for “"Shroud"”.
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Fluid mechanics of ported shroud centrifugal compressor for vehicular turbocharger applications
… an investigation of the effects of Ported Shroud (PS) self-recirculating casing treatment used in turbocharger centrifugal compressors for increasing the operable range. Computed results, assessed with experimental measurements on ported and non-ported variants of a representative …
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Effects of axial turbine tip shroud cavity flow on performance and durability
Flow through tip shroud cavity in a representative axial turbine vane-rotor stage environment is assessed for its role in loss generation and turbine durability. Steady and unsteady three-dimensional flow computations, complemented by control volume analyses, for varying shroud configurations …
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Preliminary design and viability consideration of external, shroud-based stators in wind turbine generators
… could employ a stator positioned in a shroud on the outside diameter of the turbine.' 7 I performed a preliminary investigation into some of the main design concerns and costs of a shroud-stator turbine. To answer the basic questions of functionality and cost, I considered turbine-blade …
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An experimental study of radial temperature profile effects on turbine tip shroud heat transfer
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
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Investigation of Shroud Geometry to Passively Improve Heat Transfer in a Solar Thermal Storage Tank
<p>A shroud and baffle configuration is used to passively increase heat transfer in a thermal store. The shroud and baffle are used to create a vena contracta near the surface of the heat exchanger, which will speed up the flow locally and thereby increasing heat transfer. The goal of this study is …
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The effects of secondary flows on the heat transfer to turbine nozzle endwall and rotor shroud.
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1979.
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Interdisciplinary Research Methodology for Secondary Level Social Studies: A Teaching Unit Concerning the Holy Shroud of Turin
… present historical research concerning the Holy Shroud of Turin which could be used to demonstrate the development of an interdisciplinary curriculum approach suitable for use by instructors of secondary level Social Studies. An historical methodology research design was chosen to indicate the …
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Understanding the Responses of a Metal and a CMCTurbine Blade during a Controlled Rub Event using a Segmented Shroud
Commercially available CMCs, or ceramic matrix composites, provide several benefits over metal blades including weight and increased temperature capability, which may save performance by significant reduction of the cooling flow bled from the compressor. The turbine inlet temperature has …
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Finite-Wavelength Scattering of Incident Vorticity and Acoustic Waves at a Shrouded -Jet Exit
"We consider a round jet shrouded for a finite downstream distance by a sharply-terminated concentric cylinder. As the vortical disturbances supported by a vortex-sheet model of the jet pass the sharp edge of the shroud exit some of the energy is scattered into acoustic waves. We quantify …
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Aerothermal Sentencing for Manufacturing Variations on Turbine Blade Shrouds
… of up to $2M. The current tolerances used on shroud platform radial displacements, which are required to limit shroud platform steps, are at risk of being unmatched to the corresponding influence on aerothermal performance and introduce uncertainty in the sentencing. Therefore, aerothermal …
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Development and Initial Evaluation of an Acoustic Apparatus Used For Testing of Farfield Noise Emitted by a Propeller in a Short Duct
… from the apparatus both with and without the shroud in place, as well as various engine silencer configurations. The data gathered proved the apparatus was actually about 6 dB louder with the shroud than without the shroud as a result of strong rotor-stator interactions. Based on the initial …
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Studio report: Welcome and farewell
The Sub-thesis: THE SHROUD AS A CONTEMPORARY TEXTILE ART FORM IN THE WESTERN WORLD is the result of research into the resurgence of the shroud both as a practical object and form of conceptual textile art. The Sub-thesis argues that shrouds are becoming a significant phenomenon embodying personal, …
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Studio report: Welcome and farewell
The Sub-thesis: THE SHROUD AS A CONTEMPORARY TEXTILE ART FORM IN THE WESTERN WORLD is the result of research into the resurgence of the shroud both as a practical object and form of conceptual textile art. The Sub-thesis argues that shrouds are becoming a significant phenomenon embodying personal, …
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The Effects of Shrouded Rotor Tip Leakage Flow on the Downstream Stator Aerodynamics in Turbines
… the downstream blade row. The leakage flow over shrouded turbine rotor blades is driven by the pressure drop across the blade row. The leakage flow experiences very little change in tangential velocity as it moves through the rotor shroud cavity, hence, when the leakage flow re-enters the …
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Experimental analysis of an energy self sufficient ocean buoy utilizing a bi-directional turbine
An experimental analysis of a Venturi shrouded hydro turbine for wave energy conversion. The turbine is designed to meet the specific power requirements of a, Woods Hole Oceanographic Institute offshore monitoring buoy using a unique gumby hose mooring system. The buoy's mission is to monitor the …
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Design of a flexible containment system for deep ocean oil spills
… mostly assembled until needed. The 3m-diameter shroud induces a flow that dilutes the gas to avoid hydrate formation. Yet the velocity is sufficiently small for gas to dissolve, reducing surface gas concentrations below workers' safety thresholds. The chimney effect causes a pressure …
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Computational study of 3D turbulent air flow in a helical rocket pump inducer
… region, with velocities of same order, and from shroud to hub. Secondary and tip leakage flows combine to give a region of high flow losses and blockage near the shroud wall, and the secondary flow pattern is nearly fully developed by the inducer exit. Original details were also resolved in the …
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Graphene Oxide Reinforcement in Plasma Sprayed Nickel-5%Aluminum Coatings
… from the metal powder, or (2) Installing a shroud on the front of the plasma gun and backfilling with Argon to inhibit combustion. The uniquely designed solution suspension configuration resulted in a higher deposition efficiency of graphene oxide while the inert shroud configuration had a …
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Secondary flows in centrifugal compresser impellers
… flow measurements made in a 1 metre diameter, shrouded, centrifugal (Ghost) impeller running at 500 rpm are presented. Relative velocities and rotary stagnation pressures $(p*=p-\frac{1}{2}\ρω^{2}r^{2}+\frac{1}{2}\ρW^{2})$ were measured on five cross-sectional planes between the impeller inlet …
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