Wingtip device ≈ Wingtip device
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Wingtip-Mounted Propellers: Aerodynamic Analysis of Interaction Effects and Comparison with Conventional Layout Open
Wingtip-mounted propellers installed in a tractor configuration can decrease the wing induced drag by attenuating the wingtip vortex by the propeller slipstream. This paper presents an aerodynamic analysis of the propeller-wing interaction…
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The effect of aspect ratio on the leading-edge vortex over an insect-like flapping wing Open
Insect wing shapes are diverse and a renowned source of inspiration for the new generation of autonomous flapping vehicles, yet the aerodynamic consequences of varying geometry is not well understood. One of the most defining and aerodynam…
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Commercial aircraft performance improvement using winglets Open
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Numerical heat transfer in a solar air heater duct with punched delta-winglet vortex generators Open
The flow topology and thermohydraulic performance of a novel designed punched delta-winglet (P-DW) placed on the absorber of a solar air heater duct are numerically explored. The effects of geometrical parameters, namely, the relative wing…
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Testing of a Hinged Wingtip Device for Gust Loads Alleviation Open
Recent aircraft designs have considered higher aspect ratio wings to reduce induced drag for improved fuel efficiency; however, to remain compliant with airport gate requirements, folding wing-tips have been introduced as a solution to the…
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Effects of position and geometry of curved vortex generators on fin-tube heat-exchanger performance characteristics Open
The thermal and fluid-flow characteristics of the rectangular-winglet, delta-winglet-upstream (DWU), and delta-winglet-downstream (DWD) curved vortex generators (CVGs) are computationally analyzed in this study. Polar coordinates based on …
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CFD Study of the Impact of Variable Cant Angle Winglets on Total Drag Reduction Open
Winglets are commonly used drag-reduction and fuel-saving technologies in today’s aviation. The primary purpose of the winglets is to reduce the lift-induced drag, therefore improving fuel efficiency and aircraft performance. Traditional w…
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An Experimental Study on the Effects ofWinglets on the Wake and Performance of a ModelWind Turbine Open
Wind tunnel experiments were performed to investigate the effects of downstream-facing winglets on the wake dynamics, power and thrust of a model wind turbine. Two similar turbines with and without winglets were operated under the same con…
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Design of a Morphing Wingtip Open
An initial design of a morphing wingtip for a regional jet aircraft is developed and evaluated. The adaptive wingtip concept is based upon a chiral-type internal structure, enabling controlled cant angle orientation, camber, and twist thro…
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Performance enhancement of fin and tube heat exchanger employing curved trapezoidal winglet vortex generator with circular punched holes Open
Vortex generation is a potential passive technology for increasing the heat transfer rate in the air side of fin and tube heat exchangers (FTHEs). This study proposes novel configurations of a curved trapezoidal winglet vortex generator (C…
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The effect of using winglets to enhance the performance of swept blades of a horizontal axis wind turbine Open
One of the recent methods to improve the performance of horizontal axis wind turbine is to attach a winglet at the tip of the blade of these turbines. Winglets reduce the effect of vortex flow at the blade tip and thus improve the performa…
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Numerical Study of Heat Transfer Enhancement of Internal Flow Using Double-Sided Delta-Winglet Tape Insert Open
A numerical study was performed to investigate the thermal performance characteristics of an enhanced tube heat exchanger fitted with punched delta-winglet vortex generators. Computational fluid dynamics modeling was applied using the k–ε …
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Heat transfer in a tube with combined V-winglet and twin counter-twisted tape Open
The article aims to study experimentally the enhanced thermal-hydraulic performance in a constant heat-fluxed tube inserted with V-winglet-attached twin counter-twisted tapes. Air was utilized as the test fluid and flowed into the tube in …
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Aeroelastics Flight Dynamics Coupling Effects of the Semi-Aeroelastic Hinge Device Open
A recent consideration in aircraft design is the use of folding wingtips, with the aim of enabling higher-aspect-ratio aircraft with less induced drag but also meeting airport gate limitations. This study investigates the impact of floatin…
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Gust Alleviation of a Large Aircraft with a Passive Twist Wingtip Open
This paper presents an investigation into the gust response and wing structure load alleviation of a 200-seater aircraft by employing a passive twist wingtip (PTWT). The research was divided into three stages. The first stage was the desig…
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Numerical Study of the Effect of Winglets on the Performance of a Straight Blade Darrieus Water Turbine Open
This study deals with the three-dimensional unsteady numerical simulation of the flow around a cross-flow vertical-axis water turbine (CFWT) of the Darrieus type. The influence of turbine design on its hydrodynamic characteristics and perf…
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Effect of blade tip winglet on the performance of a highly loaded transonic compressor rotor Open
The tip leakage flow has an important influence on the performance of transonic compressor. Blade tip winglet has been proved to be an effective method to control the tip leakage flow in compressor, while the physical mechanisms of blade t…
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An experimental study on the effects of winglets on the tip vortex interaction in the near wake of a model wind turbine Open
An experimental study of the near wake up to four rotor diameters behind a model wind turbine rotor with two different wing tip configurations is performed. A straight‐cut wing tip and a downstream‐facing winglet shape are compared on the …
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Numerical simulation of heat transfer enhancement from tubes surface to airflow using concave delta winglet vortex generators Open
Improvement of the convection heat transfer coefficient of the airflow has become a concern nowadays to increase the rate of heat transfer. Therefore, the present study is focused on evaluating the improvement of heat transfer numerically …
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Integrated Design of a Morphing Winglet for Active Load Control and Alleviation of Turboprop Regional Aircraft Open
Aircraft winglets are well-established devices that improve aircraft fuel efficiency by enabling a higher lift over drag ratios and lower induced drag. Retrofitting winglets to existing aircraft also increases aircraft payload/range by the…
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An Aerodynamic Study of a Domestic Scale Horizontal Axis Wind Turbine With Varied Tip Configurations Open
This paper primarily aims to investigate the aerodynamic characteristics of a small Horizontal Axis Wind Turbines (HAWT) with different blade tip configurations to enhance power generation efficiency. To understand the flow behavior at the…
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Impact of perforated shapes in delta type hindrance promoter on thermo-hydraulic performance of solar water heating system (An experimental study) Open
In this investigation, the influence of the non-circular type of holes in perforated delta-winglets on the thermo-hydraulic performance is studied. The copper strip having perforated delta-winglets attached on both sides (top and bottom) i…
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Aeroelastic Assessments and Functional Hazard Analysis of a Regional Aircraft Equipped with Morphing Winglets Open
The application of morphing wing devices can bring several benefits in terms of aircraft performance, as the current literature shows. Within the scope of Clean Sky 2 AirGreen 2 European project, the authors provided a safety-driven design…
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The effect of folding wingtips on the worst-case gust loads of a simplified aircraft model Open
In recent years, the development of lighter and more efficient transport aircraft has led to an increased focus on gust load alleviation. A recent strategy is based on the use of folding wingtip devices that increase the aspect ratio and t…
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Effect of winglet geometry on horizontal axis wind turbine performance Open
Winglets (WLs) have recently been used to improve the performance of horizontal axis wind turbine (HAWT). The WL geometry is a key parameter for diverging blade tip vortices away from turbine blades and reducing induced drag. The present s…
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Flow analysis and optimization of a vertical axis wind turbine blade with a dimple Open
In this study, the influences of the geometric characteristics of a dimple on the aerodynamic properties of a vertical axis wind turbine are investigated, and its configuration optimization that maximizes the wind turbine's performance is …
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Aerodynamic performance of several passive vortex generator configurations on an Ahmed body subjected to yaw angles Open
We evaluate the aerodynamic performance of several passive vortex generators (VGs) placed on a standard Ahmed body, with a slant angle ( α = 35º), subjected to different yawing angles ( β ) using RANS-based models. Rigorous validation of t…
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A Numerical Investigation of a Winglet-Propeller Using an LES Model Open
The generation of tip vortex cavitation (TVC) is a common phenomenon in marine propellers. Therefore, it is important to find a way for the effective suppression of TVC. Based on the enlightenment of bionics, a propeller with winglets was …
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Experimental Investigation of the Effects of Winglets on the Tip Vortex Behavior of a Model Horizontal Axis Wind Turbine Using Particle Image Velocimetry Open
This study presents an experimental investigation on the effects of winglets on the near wake flow around the tip region and on the tip vortex characteristics downstream of a 0.94 m diameter three-bladed horizontal axis wind turbine (HAWT)…
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Experimental Investigation of the Wake and the Wingtip Vortices of a UAV Model Open
An experimental investigation of the wake of an Unmanned Aerial Vehicle (UAV) model using flow visualization techniques and a 3D Laser Doppler Anemometry (LDA) system is presented in this work. Emphasis is given on the flow field at the wi…