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Showing 1 to 17 of 17 for “"winglets"”.
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A Study of the Design of Adaptive Camber Winglets
<p>A numerical study was conducted to determine the effect of changing the camber of a winglet on the efficiency of a wing in two distinct flight conditions. Camber was altered via a simple plain flap deflection in the winglet, which produced a constant camber change over the winglet span. Hinge …
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Analysis of Wingtip Vortex Structure Generated by Bio-Inspired Winglets
<p>Bio-inspired winglets were studied with the goal of better understanding the structure of the wingtip vortices they generate. Measurements of the tip vortex were previously carried out using stereoscopic particle image velocimetry (sPIV). The bio-inspired winglet was tested on a rectangular NACA …
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Understanding the Structure of Wing Tip Vortices of Bio-Inspired Winglets
<p>Bio-inspired wing tip devices were investigated with the goal of improving the fuel efficiency of subsonic aircraft. Particularly, the structure of a bio-inspired winglet design based on bird feathers were tested in a low-speed wind tunnel. Particle image velocimetry (PIV), was used to study the …
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Numerical analysis of a fin-tube plate heat exchanger with winglets
… and successfully carried out. Rectangular winglets were set in pairs, with downstream orientation. The effects of impact angles of (20⁰ , 30⁰, and 40⁰ ) as well as tubes and winglets were placed in one row lined arrangement and air flow by forward arrangement and backward arrangement. …
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Practical Applications of Delta Winglets in Compact Heat Exchangers with Louvered Fins
… studies have shown that implementing delta winglets on louvered fins along the tube wall is an effective method of augmenting tube wall heat transfer. In this thesis, the effect of delta winglets is investigated in both two- and three-dimensional louvered fin arrays. For both geometries, …
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The effect of Whitcomb winglets and other wingtip modifications on wake vortices
Wind tunnel experiments have been conducted on six different wingtip configurations to determine their wake vortex characteristics. The trailing wingtip vortex was probed by a 1/8 inch diameter five hole yawhead pressure probe in the VPI & SU Stability Wind Tunnel. The vortex tangential and axial …
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Winglet Performance Evaluation through the Vortex Lattice Method
… was to assess the possibility of retrofitting winglets to the Dassault Falcon 10 small size business jet using the vortex lattice method solver program SURFACES© by GreatOWL Publishing. The winglet geometric parameters investigated were the winglet span, cant angle, sweep and taper ratio in …
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Heat transfer enhancement in a rectangular duct by using winglet and nanofluids
… this study is representative of a channel with winglets spread over three rows each row 13 a pair of winglets. In this study, three dimensional turbulent flow of different nanofluids flow inside a rectangular duct with the existence of vortex generator winglets at different angle are (10º, 20º …
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The Investigation of an Inboard-Winglet Application to a Roadable Aircraft
… as 2D in behavior. It is also shown that the winglets produce thrust at a positive-lift wing configuration. In the Pegasus II, the vertical stabilizers act like inboard winglets and produce a thrust component from its resultant force, giving 5.2% improvement in its effective aspect ratio and …
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Effects of Louver Length and Vortex Generators to Augment Tube Wall Heat Transfer in Louvered Fin Heat Exchangers
… tube wall heat transfer with the use of delta winglets placed on the fins near the tube wall. These studies were completed on a 20X scale model of a louvered fin exchanger with a fin pitch to louver pitch ratio of 0.76 and a louver angle of 27°, over a Reynolds number range based on louver …
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Potential of Multi-Winglet Systems to Improve Aircraft Performance
… der Effekt verschiedener Anordnungen einzelner Winglets auf die jeweilige und in der Regel von den Profilwerten abweichende aerodynamische Belastbarkeit modelliert. Zum anderen erlaubt das Tool den nicht-linearen Auftriebsanstieg bei Erreichen des Grenzauftriebsbeiwerts eines Profilschnitts auf …
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Post stall propeller behavior at low Reynolds numbers
… three small propellers with tiplets similar to winglets on wings were tested and compared to traditionally tipped propellers. This comparison showed better designed traditional propellers were more efficient, but that tiplets improved performance of the specific propellers.
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Supersonic conical flow computations using a rectangular finite volume method
… wing-bodies and waveriders (with very thin winglets) have been done. Very good agreement with experimental results is found.
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Aerodynamic Properties of the Inboard Wing Concept
… The vertical tails were shown to act as winglets, reducing drag and increasing L/D. These results suggest areas for substantial improvement in aerodynamic performance of the configuration.
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Aerodynamic Analysis of Variable Geometry Raked Wingtips for Mid-Range Transonic Transport Aircraft
… the most common types of treatment are blended winglets and raked wingtips. With Boeing currently investigating novel designs for its next generation of airliners, a variable geometry raked wingtip novel control effector (VGRWT/NCE) was studied to determine the aerodynamic performance benefits …
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Vortex generator arrays in air-cooled condensers for power plant applications
This study presents a numerical analysis of laminar convective heat transfer in a rectangular channel with different configurations of delta-winglet vortex generators (VG). A low and high Reynolds number case of 225 and 1123 is simulated which is representative of the lower and upper limits of the …
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Bio-inspired adaptive wingtip devices for low Reynolds number operation
The student, Michael Lynch, submitted this Thesis for approval on 2017-04-27 at 18:38.