Sizing of High Aspect Ratio Wings with Folding Wing Tips

2022 ◽  
Author(s):  
Huaiyuan Gu ◽  
Fintan Healy ◽  
Djamel Rezgui ◽  
Jonathan E. Cooper
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Folding Wing ◽  
Wing Tips

scholarly journals Preliminary investigation of use of flexible folding wing tips for static and dynamic load alleviation

2016 ◽  
Vol 121 (1235) ◽  
pp. 73-94 ◽  
Author(s):  
A. Castrichini ◽  
V. Hodigere Siddaramaiah ◽  
D.E. Calderon ◽  
J.E. Cooper ◽  
T. Wilson ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Preliminary Investigation ◽  
Aircraft Design ◽  
Dynamic Loads ◽  
Induced Drag ◽  
Aeroelastic Model ◽  
Static And Dynamic Loads ◽  
Folding Wing ◽  
Wing Tips ◽  
Wing Tip

ABSTRACTA recent consideration in aircraft design is the use of folding wing-tips with the aim of enabling higher aspect ratio aircraft with less induced drag while also meeting airport gate limitations. This study investigates the effect of exploiting folding wing-tips in flight as a device to reduce both static and dynamic loads. A representative civil jet aircraft aeroelastic model was used to explore the effect of introducing a wing-tip device, connected to the wings with an elastic hinge, on the load behaviour. For the dynamic cases, vertical discrete gusts and continuous turbulence were considered. The effects of hinge orientation, stiffness, damping and wing-tip weight on the static and dynamic response were investigated. It was found that significant reductions in both the static and dynamic loads were possible. For the case considered, a 25% increase in span using folding wing-tips resulted in almost no increase in loads.

Correction: Testing of Folding Wing-Tip for Gust Load Alleviation in High Aspect Ratio Wing

2019 ◽  
Author(s):  
Ronald C. Cheung ◽  
Djamel Rezgui ◽  
Jonathan E. Cooper ◽  
Thomas Wilson
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Folding Wing ◽  
Gust Load Alleviation ◽  
Wing Tip

scholarly journals Testing of Folding Wing-Tip for Gust Load Alleviation in High Aspect Ratio Wing

2019 ◽  
Author(s):  
Ronald C. Cheung ◽  
Djamel Rezgui ◽  
Jonathan E. Cooper ◽  
Thomas Wilson
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Folding Wing ◽  
Gust Load Alleviation ◽  
Wing Tip

scholarly journals Aerodynamic effects of a folding wingtip to increase take-off, landing and cruise performance.

2022 ◽  
pp. 35-44
Author(s):  
S Rajat Singh ◽  
Amala Raja Rajeswar Gajula ◽  
Praneetha Maccha
Keyword(s):  
High Pressure ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Fuel Efficiency ◽  
Bottom Surface ◽  
Induced Drag ◽  
The World ◽  
Gust Loads ◽  
Folding Wing ◽  
Wing Tip

The main purpose of a folding wing tip is to allow aerodynamically efficient high aspect ratio wing. To allow a wing tip to move in flight is to alleviate the loads and achieve lower wing weight or enable wing span to maximize. Thus reduces the induced drag and improve fuel efficiency. The folding wing tip may include spring devices in order to provide an additional gust loads alleviation ability in flight. A wing without a winglet produces wingtip vortices which increases drag as the air from the bottom surface of the wing (high pressure) tries to move to the upper surface (low pressure). To avoid this and have less vortices a winglet is used, around which the flow is same on both surfaces. A folding wingtip can be set at an angle of 0° to have maximum cruise performance and aspect ratio. If the wingtip is set in the range of 15°-50° it can increase lift during take-off. This folding wingtip can access any airport in the world because if it is folded at an angle of 90°, it can meet the gate requirements and restrictions of any airport. To study the performance of this mechanism, the wing tip was designed by using CATIA V5 software. The analysis of the wingtip at different angle of attacks was done using ANSYS and XFLR 5 softwares.

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