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 483 for “"wings"”.
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Perching with fixed wings
Human pilots have the extraordinary ability to remotely maneuver small Unmanned Aerial Vehicles (UAVs) far outside the flight envelope of conventional autopilots. Given the tremendous thrust-to-weight ratio available on these small machines [1, 2], linear control approaches have recently produced …
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Wings of the White Dove
Novel
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Flap of a Butterfly's Wings
<p>The goal of this thesis is to draw attention to the often overlooked work that is done by activists and their networks when it comes to influencing international policy and law. The case study looks at the “Comfort Women” issue, an unresolved conflict from when the Japanese Imperial Army forced …
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Aeroelastic behaviour of composite wings
… dynamic and aeroelastic behaviour of composite wings. The study begins with a literature review where the development of aeroelastic tailoring and specific applications of the technology are discussed in detail. A critique of methods for the determination of cross-sectional rigidity properties …
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Aeroelastic Analysis of Membrane Wings
The physics of flapping is very important in the design of MAVs. As MAVs cannot have an engine that produces the amount of thrust required for forward flight, and yet be light weight, harnessing thrust and lift from flapping is imperative for its design and development. In this thesis, aerodynamics …
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Wings into darkness & Poetry - An Essay
Includes bibliography.
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System reliability optimization of aircraft wings
System reliability based design of aircraft wings is studied. A wing of a light commuter aircraft designed according to the FAA regulations is compared with one designed by system reliability optimization. Both the level III, and the advanced first order, second moment (AFOSM) method are employed …
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Separated Flows Over Non-slender Delta Wings
Wings with sweep are ubiquitous for engineering applications, and are observed in biology for swimmers and fliers alike. In particular, delta wings have wide ranging applicability arising from their low speed maneuvering characteristics, and favourable properties approaching the speed of sound. …
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Numerical Simulations of Iced Airfoils and Wings
… on the aerodynamic performance of airfoils and wings. In the first part of this study, a range of Reynolds numbers and Mach numbers, as well as ice-shape sizes and ice-shape locations were examined for various airfoils with the Reynolds-Averaged Navier-Stokes approach. Comparisons between …
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Propulsion considerations for supersonic oblique flying wings
Propulsion considerations unique to the supersonic oblique flying wing, including cycle selection, sizing, and integration were investigated via the development and interrogation of aerodynamic and propulsive synthesis models. These models were an amalgamation of computational tools (MSES), …
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Numerical simulations of wings in unsteady flows
… The present computed results for thick and thin wings are in close agreement with the experimental data. The numerical results obtained from a lifting-surface approximation are also in close agreement with the experimental data for a wing as thick as 18%. The lift and moment coefficients are …
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The Aerodynamics of Low Sweep Delta Wings
The aerodynamics of wings with moderately swept wings continues to be a challenging and important problem due to the current and future use in military aircraft. And yet, there is very little work devoted to the understanding of the aerodynamics of such wings. The problem is that such wings may be …
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Shape and Structural Optimization of Flapping Wings
… and structural optimization studies on flapping wings for micro air vehicles. The design space of the optimization includes the wing planform and the structural properties that are relevant to the wing model being analyzed. The planform design is parameterized using a novel technique called …
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Aeroelasticity of Morphing Wings Using Neural Networks
… The use of adaptive materials in aircraft wings allows for the change of the contour or the configuration of a wing (morphing) in flight. The use of smart materials, to accomplish these deformations, can imply that the stiffness of the wing with a morphing contour changes as the contour …
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Measurements of Wings at Very Low Reynolds Numbers
… The lift and drag behavior for rectangular wings with discretely angled wing profiles and aspect ratio were obtained at Reynolds numbers between 4,000 and 10,000. This thesis is intended to inform both future force measurement apparatus development for water tunnel applications and …
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Flapping wings for dual aerial and aquatic propulsion
… propulsion using a single set of flapping wings, offering an existence proof for favorable ow physics. Flapping wings thereby demonstrate a large force envelope, with capabilities far beyond the limits of static airfoil section coefficients, purely by changing the wing motion trajectory. …
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Cross-Sectional Stiffness Properties of Complex Drone Wings
… of long slender beam like structures, e.g., wings, wind turbine blades, and helicopter rotor blades, etc. The main feature consists of the addition of the coupling between axial and bending with torsional effects that may arise when using composite materials and the coupling stemming from the …
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A CFD/CSD Interaction Methodology for Aircraft Wings
With advanced subsonic transports and military aircraft operating in the transonic regime, it is becoming important to determine the effects of the coupling between aerodynamic loads and elastic forces. Since aeroelastic effects can contribute significantly to the design of these aircraft, there is …
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