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Showing 1 to 20 of 21 for “"winglet"”.
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Structural Design of a Business Jet Winglet
<p>Structural sizing of a winglet for the Falcon 10 was performed and is presented here. The aerodynamic profile of the winglet was taken from a previous study, which predicted an increase in range of 3.3% with an estimated weight increase of 52 kg. An investigation of the current structure layouts …
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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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Potential of Multi-Winglet Systems to Improve Aircraft Performance
… ist die Untersuchung des Potenzials von Multi-Winglet Konfigurationen zur Leistungssteigerung von Flugzeugen. Multi-Winglet Systeme sind aus der Vogelwelt bekannt. Die offensichtliche Diskrepanz zwischen dem Erfolg der Multi-Winglet Konfiguration in der Natur sowie dem theoretisch großen …
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Vortex-enhanced heat transfer by a new delta-winglet array
Liquid-to-air and phase-change heat exchanger performance is crucial to meet efficiency standards with low cost and environmental impact in numerous end-use energy applications. Research on performance improvement of heat exchangers often focuses on the air side because transport coefficients are …
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The Investigation of an Inboard-Winglet Application to a Roadable Aircraft
The inboard-winglet concept was examined for its flow characteristics by testing for pressure coefficients over the wing and winglet surface in the Virginia Tech Stability Wind Tunnel over a range of freestream velocity and angle of attack. The results were analytically applied to calculate …
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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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Aerodynamic and Structural Design of a Winglet for Enhanced Performance of a Business Jet
<p>The preliminary design of a winglet to improve the range and fuel burn of the Falcon 10 business jet is presented. Twelve candidate geometries were studied varying the cant angle and the span. The configuration offering the best compromise between induced drag reduction, profile drag increase …
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The effect of Whitcomb winglets and other wingtip modifications on wake vortices
… Primary focus is placed on the Whitcomb winglet and its individual components, the upper winglet alone and the lower winglet alone. It is shown that the Whitcomb winglet and the upper winglet configuration both produce two distinct vortices of the same rotation. The maximum tangential …
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A Study of the Design of Adaptive Camber Winglets
… 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 points were located at 20%, 50% and 80% …
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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
… 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 flow field at two planes aft of the wing as the wing tip vortices developed downstream. These were time-dependent, …
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Experimental Characterization of Additively Manufactured Multi-Feather Wingtip Devices
… visualization campaign showed that the basic winglet had flow over the wing that was closest to two-dimensional flow. This was reinforced by the analysis of the lift to drag ratio where the basic winglet had an increased aerodynamic efficiency of up to 25% over the wing with no attachment. Two …
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Stability enhancement of a transonic wing using a passive nonlinear energy sink
… the computational aeroelastic study, a prototype winglet-mounted NES was designed and built. Computational aeroelastic analysis of the wing, modeled with the winglet and NES using experimentally identified parameters, showed that the prototype improves aeroelastic stability, but external housings …
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Validation and Uncertainty Quantification of Doublet Lattice Flight Loads using Flight Test Data
… equipped with Tamarack® Aerospace Group’s active winglet modification, ATLAS® (Active Technology Load Alleviation System). ATLAS® allows for significant aerodynamic improvements to be realized by reducing loads to below the values of the original, unmodified airplane. Flight loads are measured …
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Vortex generator arrays in air-cooled condensers for power plant applications
… 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 air velocity range between 1-5 m/s in a typical air-cooled condenser (ACC) system. The …
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Formgedächtnislegierungen
… der adaptive Tragflügel und das adaptive Winglet, gebaut worden. Diese sollen je nach Vorgabe eine entsprechende Form einnehmen, die durch eine modifizierte Regelung für Formgedächtnislegierungen eingestellt wird. Dabei wird die Verformung der Struktur über Dehnungsmessstreifen erfasst und …
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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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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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