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 20 of 26 for “"pylon"”.
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Study of the Influence of Nacelle and Pylon on Aerodynamics of a New VU Design
… to illustrate the influence of the nacelle and pylon on aerodynamics of a new Very Light Jet design, using Computational Fluid Dynamics.</p> <p>The objective of the first phase was to repair the existing CATIA model in order to facilitate the meshing process.</p> <p>The second and third phase …
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Martial eagles and the national power grid in South Africa: the implications of pylon-nesting for conservation management
… However, Martial Eagles also build nests on pylons that support high voltage transmission lines running through the largely treeless, semiarid landscapes of the Karoo. The main aim of this study was to develop a better understanding of the environmental factors that influence Martial Eagle …
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Numerical Wing/Store Interaction Analysis of a Parametric F16 Wing
… to examine fluid-structure interaction of a wing/pylon/store system has been developed. The aeroelastic equation of motion of the complete system is solved iteratively in the time domain using a two-entity numerical code comprised of ABAQUS/Standard and the Unsteady-Vortex-Lattice Method. Both …
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Visual localisation of electricity pylons for power line inspection
… we studied the visual localisation of a pylon. The pylon is the most prominent component of the power infrastructure and can provide a context for the inspection of the other components. Point-based descriptors tend to perform poorly on texture less objects such as pylons, therefore we …
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An engine air-brake integration study
… an engine air-brake (EAB) integrated with a pylon duct bifurcation in a realistic aircraft engine environment has 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 …
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Der Tempel des Chnum der 18. Dyn. auf Elephantine
… Thutmosis III. vor einem offenen Hof einen Pylon aus Sandstein, der in seiner Breite den Kernbau wiederholte und damit in seinen Abmessungen den 6. Pylon von Karnak nachahmte, seiner Dekoration zufolge jedoch nach dem 8. Feldzug im Jahr 33 enstanden sein muss und damit eine Parallele zum 7. …
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Faulkner's Marginal Couple and the Community
… of the community in Sanctuary, Light in August, Pylon, and The Wild Palms disturb that community's sense of itself. These alternative couples challenge mainstream Faulkner critics' assessment of gender, which derives largely from Cleanth Brooks's argument that Faulkner created active men who …
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Faulknerian comedy
… <em>The Unvanquished</em>, <em>Pylon</em>, <em>Knight’s Gambit</em>, and <em>A Fable</em>, treats <em>The Wild Palms</em> in passing and the short stories only incidentally. The very brief discussions of <em>New Orleans Sketches</em>, <em>Mosquitoes</em>, <em>Intruder in the …
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Propeller whirl flutter analysis of the nasa all-electric X-57 through multibody dynamics simulations
… propeller has a large margin of safety with the pylon pitch and yaw stiffness values having to be reduced by two orders of magnitude for whirl flutter to occur. The semi-span undergoes three design revisions to ensure whirl flutter is not encountered for any of the symmetric wing modes. The …
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A model for Hybrid Dynamic Beam Movement with Specific Application to Wind Energy Units
… model for a wind turbine and its supporting pylon, to analyze and simulate attendant vibration phenomena and to suggest and simulate an appropriate control procedure. A wind turbine can be described as an elastic system consisting of distributed parameter, beam and rod type, elements coupled …
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An analysis of the aerodynamics of a fiber optic mortar projectile
… The sting was mounted on a streamlined vertical pylon which provided remote rotation in both pitch and yaw while maintaining the center of the balance along the tunnel centerline. The model inputs included the six-component force and moment data in body coordinates and the pressure data from the …
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Development of an engine model for an integrated aircraft design tool
… which also includes the nacelle, nozzle, and pylon. The new model estimates bare engine weight within +/-10% of published values for seven existing engines, and improves TASOPT's accuracy in predicting the geometry, weight, and performance of the Boeing 737-800. The effects of existing TASOPT …
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A Computational Study of Engine Deflection Using a Circulation Control Wing
… and Landing Aircraft offers a solution by pylon mounting over the wing engines. Analysis shows that the engine thrust is still deflected downward resulting in very high lift coefficients above 6.6. In the culmination of this project Cal Poly would like to find a correlation between the …
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System design and manufacturability of concrete spheres for undersea pumped hydro energy or hydrocarbon storage
… turbines are expected to be more economical than pylon-based wind turbines, In order for offshore wind energy to maintain a steady supply to the grid without excessive ramping-up and ramping-down of onshore, fossil-fueled power generation units and to reduce the cost of wind integration, some form …
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Using multiple view geometry for transmission tower reconstruction
… in the form of a reconstructed transmission pylon that arises from image data. To this end, structure from motion techniques are used to understand multiple view geometry and extract camera extrinsics. Thereafter, a state-of-art line reconstruction algorithm is applied to produce a tower. The …
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Biomechanical adaptations involved in ramp descent: Impact of microprocessor-controlled ankle-foot prothesis. Kinetic and kinematic responses to using microprocessor-controlled ankle-foot prosthesis in unilateral trans-tibial amputees during ramp descent
… resistance which reduced the shank/pylon rotation velocity over the support foot, leading to an increase in negative work done by the prosthesis. These findings highlight the importance of having controlled ankle motion in ramp descent. Use of an MC-AF can provide TTs controlled …
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The effects of prosthetic alignment on gait biomechanics
… both the forces and moments at the socket/pylon interface using inversedynamics calculations based on captured kinematic and kinetic data.Because this pilot study involved only one subject, the findings should be treated withcaution. However, it is possible to make tentative conclusions …
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An Experimental Investigation of the STOL Performance of Cal Poly's AMELIA in the NFAC
… at zero angle-of-attack. Testing at two engine pylon heights allowed for the highly coupled propulsion and flow control system to be characterized.</p>
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Numerical Prediction of the Interference Drag of a Streamlined Strut Intersecting a Surface in Transonic Flow
… that occurs on a strut-braced wing airplane, pylons, and other applications is significant. The purpose of this work is to provide relationships to estimate the interference drag of wing-strut, wing-pylon, and wing-body arrangements. Those equations are obtained by fitting a curve to the …
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A method for identifying structural load share opportunities in aircraft powerplant configurations
… thrust reverser, engine core casings and the pylon mounts) are designed independently to meet their individual specific functional requirements. This results in inefficiencies in the overall system and a lack of understanding of how such structures behave as one unit. <br/><br/>With the …
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