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 95 for “"Flaps"”.
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Folded Lightweight Actuated Position System (FLAPS) for CubeSat Deployables
… Folded Lightweight Actuated Positioning System (FLAPS) demonstrates the use of shape memory alloy (SMA) strips along with a feedback control loop as a repeatable use actuator for small satellites. SMAs are metal alloys that remember a stored shape when transitioning to the austenitic phase at a …
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The design and development of aquatic exercise shoe flaps
… exercise effect. The structure is called AquaFlaps. Several sketch models were made in the development of the idea leading to several foam prototypes created using the water jet. Testing of these models and prototypes yielded useful data which helped towards the final design. Testing also …
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Opercular Flaps as Sexual Ornaments For Male Longear Sunfish (Lepomis Megalotis)
… a fish species may be the exaggerated opercular flaps of male longear sunfish (Lepomis megalotis). The opercular flaps are soft scaleless extensions of the opercula which are conspicuously colored, associated with exaggerated gestures and sexually dimorphic for length. I investigated the effects …
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An Investigative Study of Gurney Flaps on a NACA 0036 Airfoil
<p>This project examined the effect of Gurney flaps on a 2D, 2-ft chord NACA 0036 airfoil in the Cal Poly 3’x4’ low speed wind tunnel at 25 m/s. It also covered the numerical simulation of the experiment in computational fluid dynamics (CFD). During the study, problems with the wind tunnel data …
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Aerodynamic modeling and assessment of flaps for hypersonic trajectory control of blunt bodies
Independently articulated aerodynamic flaps on a blunt-body entry vehicle may provide a feasible alternative to current state-of-the-art bank-angle steering control while introducing additional benefits during entry, descent, and landing. Flaps provide direct control of the vehicle’s lift and drag …
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CFD analysis and design of a low-twist, hovering rotor equipped with trailing-edge flaps
… with both slotted and blended trailing-edge flaps. This was accomplished by combining a simple blade element method with 3D inviscid and RANS CFD that allowed for a robust sequence of design specification, analysis, and verification. Most modern helicopters have high levels of blade twist and …
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Remote, non-invasive ischaemic preconditioning of skeletal muscle flaps against ischaemic necrosis : efficacy and mechanism
HYPOTHESIS: That skeletal muscle, throughout the body, can be preconditioned to better withstand prolonged periods of ischaemia, by first subjecting a remote muscle to brief, non-invasive and sub-lethal, cycles of ischaemia and reperfusion, using a hindlimb tourniquet.
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The lateral-directional characteristics of a 74-degree delta wing employing gothic planform vortex flaps
… the latest generation, gothic planform vortex flaps has been conducted. In addition, the theoretical estimates from VORSTAB were compared against experimental data to aid in documenting this new method. VORSTAB is an extension of the Quasi-Vortex-Lattice Method of Lan which empirically accounts …
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Development of a design methodology for transport aircraft variable camber flaps suitable for cruise and low-speed operations
This thesis describes the development of a generic design methodology for variable camber flap systems for transport aircraft, intended to be used for cruise and low-speed operations. The methodology was structured after several revisions were performed on conventional high-lift device design …
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A numerical study of the effects of leading edge vortex flaps on the performance of a 75° delta wing
… delta wing with and without leading edge vortex flaps. The flap had an area approximately 26 percent of the wing area with a constant chord of 6.7 percent of the wing mean aerodynamic chord and was deflected at 30°. Results for lift, drag, axial force, and pitching moment coefficients are …
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Superficial temporal artery flap: its development and application in the dog and cat
… artery in the control dogs (n=5), rendered flaps dependent on the subdermal plexus. Dogs in group A (n=5) and the control group (n=5) had flap lengths that extended to the contralateral eye, while group B (n=4) flaps extended to the contralateral zygomatic arch. A11 flap widths were …
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Use of the Discrete Vortex Method to Calculate Wind Loads over a Surface-Mounted Prism and a Bridge Cross-Section with Flaps
… The second is a bridge section with attached flaps that can be oriented to vary the moment coefficient. Advantages and disadvantages of using DVM for these applications are discussed. For the surface-mounted prism, the results show that the developed code correctly predicts the flow separation …
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Design and Performance of Circulation Control Geometries
… that make up the CC flap. Multiple dual radius flaps and alternative flap geometry, prescribed radius, flaps were developed by varying specific flap parameters from a baseline dual radius flap configuration that had been previously developed and researched. The aerodynamics of the various flap …
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Evaluation of the clinical outcome of curvilinear transport distraction osteogenesis and revascularised fibula free flaps in the reconstruction of large post-maxillectomy defects
Background: Maxillary defects caused by trauma or tumour resection in the head and neck region can be devastating to the patient from a cosmetic and functional perspective. Patients who undergo maxillectomy procedures experience a substantial deterioration in their primary oral functions such as …
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Experimental Investigations into Shark Skin Inspired Active Flow Control Mechanisms
… reducing flow separation with actively actuated flaps inspired by bristlingshark scales was studied experimentally using digital particle image velocimetry (DPIV).The flaps in this study had a rectangular shape and were designed with a protrusion heightin the bottom 10% of the boundary layer …
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UNDERSTANDING ANATOMICAL PERFUSION AND STRATEGIES TO OPTIMIZE VASCULARITY IN FREE TISSUE TRANSFER FOR AUTOLOGOUS BREAST RECONSTRUCTION USING THE DEEP INFERIOR EPIGASTRIC ARTERY PERFORATOR (DIEP) FLAP
… Inferior Epigastric Artery Perforator (DIEP) flaps, the role of linking vessels on dynamic perfusion in bilateral breast reconstruction and strategies to augment flap vascularity. For the ex-vivo anatomical studies, three and four-dimensional computed tomographic angiography (CTA) were used to …
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ΟΙ ΜΥΟΔΕΡΜΑΤΙΚΟΙ ΚΡΗΜΝΟΙ ΣΤΗΝ ΕΠΑΝΟΡΘΩΤΙΚΗ ΧΕΙΡΟΥΡΓΙΚΗ ΤΗΣ ΚΕΦΑΛΗΣ ΚΑΙ ΤΡΑΧΗΛΟΥ
… BEEN OPERATED. AFTER ABLATION SURGERY VARIOUS FLAPS HAVE BEEN USED FORRECONSTRUCTION OF THE AREA SUCH US THE DELTOPECTORAL FLAP AND THE MYOCUTANEOUS FLAPS OF THE PECTORALIS MAJOR AND STERNOMASTOID MUSCLES. IN A 130 CASES THE CERVICAL OESOPHAGUS WAS RECONSTRUCTED AND PARAMETERS FOR THE FLAP …
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A RETROSPECTIVE EVALUATION OF THE ACCURACY OF COMPUTER ASSISTED MANDIBULAR RECONSTRUCTION WITH FREE FIBULAR FLAPS TO RECONSTRUCT MANDIBULAR DEFECTS FOLLOWING ABLATIVE TUMOUR THERAPY IN A SINGLE CENTRE
Mandibular reconstruction is crucial to restore form and function following segmental mandibulectomies for ablative tumour therapy. Traditional methods utilizing free hand contouring of the neomandible rely heavily on the individual clinician’s experience and produced variable results. The …
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All The King's Horses: The Delta Wing Leading-Edge Vortex System Undergoing Vortex Breakdown: A Contribution to its characterization and Control under Dynamic Conditions
… of the breakdown location. The effect of cavity flaps on the flow over a delta wing was documented for steady angles of attack in the range 28 degrees to 42 degrees by flow visualization and surface pressure measurements at a Reynolds number of 470,000 and 1,000,000, respectfully. It was found …
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