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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 92 for “"vanes"”.
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Analysis and design of transonic cascades with splitter vanes
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
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Cluster Weather Vanes: Radio Galaxies as Indicators of Galaxy Cluster Dynamics
… We find that RG jets make excellent "weather-vanes" for understanding the dynamics of their surrounding media, and useful tools for understanding the motions in galaxy clusters.
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Aerodynamic design of moveable inlet guide vanes for active control of rotating stall
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1990.
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A Comprehensive Three-Dimensional Analysis of the Wake Dynamics in Complex Turning Vanes
… structures formed in the wake of complex turning vanes. The vane packs were designed by the StreamVane swirl distortion generator technology, a design system that can efficiently reproduce swirl distortion for compressor rig and full turbofan engine testing. StreamVanes consist of an array of …
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Step Misaligned and Film Cooled Nozzle Guide Vanes at Transonic Conditions: Heat Transfer
… on the endwall heat transfer for nozzle guide vanes in a land based power generation gas turbine at transonic conditions. Endwall Nusselt Number and adiabatic film cooling effectiveness distributions were experimentally calculated and compared with qualitative data gathered via oil paint flow …
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Design Solutions for the Coupling of High-Pressure Turbine Vanes to Pressure-Gain Combustors
L'abstract è presente nell'allegato / the abstract is in the attachment
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Multi-step optimization of internal cooling channels for gas turbine vanes using adjoint methods and machine learning
L'abstract è presente nell'allegato / the abstract is in the attachment
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An experimental study of the aft guide vanes of an engine bypass nacelle for low-boom supersonic flight
… around the gearbox, a set of thin forward guide vanes, and a set of thick, strut-like aft guide vanes. The aft guide vanes, which also serve structural purposes, are used to direct the flow such that the exhaust is a uniform, nearly-full annular cross-section, and to choke and then accelerate the …
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An experimental study of the forward guide vanes of an engine bypass nacelle for low-boom supersonic flight
Made available in DSpace on 2011-08-25T22:16:42Z (GMT). No. of bitstreams: 3 Herrera_Arthur.pdf: 9040481 bytes, checksum: b1cb32088f9dbae91d7f22098b17feb2 (MD5) license.txt: 4064 bytes, checksum: e734bd04ed7c751742bd7380d9b55410 (MD5) Herrera_Arthur.docx: 22589106 bytes, checksum: …
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Interactions of a Human Body with Parallel Angled Vanes Used to Improve Public Safety at a Low-Head Dam
… showed that angled parallel submerged vanes might improve public safety by eliminating the submerged hydraulic jump and creating a flow that carries a body entering that flow laterally toward the channel bank, thus improving the chance of rescue. In this work, the potential interactions …
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Investigation of Control Effectors for Ducted Fan VTOL UAVs
… measure each control effector's performance. Box vanes, mounted downstream of the duct, utilized four assemblies, each with three vanes and one flap. This configuration showed adequate results in generating a nose-down pitch moment. Duct deflectors, mounted on the windward strut upstream of the …
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Effects of Duct Lip Shaping and Various Control Devices on the Hover and Forward Flight Performance of Ducted Fan UAVs
… on the interior of the duct lip surface. Control vanes positioned aft of the duct were tested as the primary attitude control for the vehicle. An empirical control vane model was created based on the static data for the control vanes, and it was applied to wind tunnel test results to determine the …
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An engine air-brake integration study
… been analyzed. The EAB uses variable exit guide vanes downstream of a high bypass ratio (BPR) fan rotor to produce drag quietly by swirling flow out of the fan nozzle. The swirling motion yields low pressure in the vortex core from simple radial equilibrium, thereby generating pressure drag. The …
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Concentration And Velocity Fields Throughout The Flow Field Of Swirling Flows In Gas Turbine Mixers
… an annular flow profile and incorporated swirl vanes to produce a swirling flow to promote fuel/air mixing. The fuel was injected into the bulk flow from the pressure side of the swirl vanes. The first mixer had a swirl angle of 45°, while the second had a swirl angle of 55°. In order to …
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The effects of manufacturing variability on turbine vane performance
Gas turbine vanes have airfoil shapes optimized to deliver specific flow conditions to turbine rotors. The limitations of the manufacturing process with regards to accuracy and precision mean that no vane will exactly match the design intent. This research effort is an investigation of the effects …
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Characterization of the flow field response to vaneless space reduction in centrifugal compressors
… frequency of the waves is set by the diffuser vanes passing frequency and the wavelength by the product of the diffuser vane passing period and the speed of the wave. It is demonstrated that the difference in static pressure from the pressure surface to the suction surface at the leading edge …
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Experimental and Computational Study of Roughened Surface For PWR Rod Bundles
… assemblies utilize spacer grids with flow mixing vanes to augment the coolant turbulence and improve heat transfer from the fuel rods. However, in the regions where the turbulence due to mixing vanes is the lowest, the heat transfer is the worst, resulting in higher temperatures and limiting …
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Design and development of a rectangular supersonic wind tunnel facility for the study of shock/boundary layer interactions
… micro-vortex generators, in the form of ramped vanes, were performed to demonstrate the capabilities of the new tunnel. A 5° expansion diffuser was situated downstream of the vortex generators to model the effects of a supersonic external compression inlet and diffuser. The incoming boundary …
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An experimental study of improvement of a micro hydro turbine performance
… followed by some details on the design of guide vanes, runner blades and draft tube of axial flow turbines, these components being usually regarded as areas which have major impact on the performance of hydraulic turbines. The next chapter gives the details of the test circuit that was …
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An investigation of laser drilling variation and the application of a knowledge management framework
… laser drilling holes in gas turbine blades and vanes. The complexity of such advanced manufacturing techniques requires a disciplined approach toward process improvement. In addition, manufacturing knowledge management systems must be put in place to provide the foundation for improvement …
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