Fiber-reinforced polymers with integrated shape memory alloy actuation: an innovative actuation method for aerodynamic applications

Hübler, Moritz; Nissle, Sebastian; Gurka, Martin; Breuer, Ulf Paul

doi:10.1007/s13272-016-0209-0

“…Therefore, the winglet can be adjusted at different flight conditions to get the best lift-induced drag reduction for the given flight phase. Similar solutions have been already proposed, but most of them focused on the use of shape memory alloy materials [4][5][6][7], foldable wings during ground operations [8][9][10][11], and complaint surfaces [12][13][14][15]; but just a few of them have addressed variable cant angle winglets for drag reduction while flying [16][17][18][19].…”

Section: A B C Dmentioning

confidence: 99%

CFD Study of the Impact of Variable Cant Angle Winglets on Total Drag Reduction

Guerrero

¹

,

Sanguineti

²

,

Wittkowski

³

2018

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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 winglets are designed as fixed devices attached at the tips of the wings. However, because they are fixed surfaces, they give their best lift-induced drag reduction at a single design point. In this work, we propose the use of variable cant angle winglets which could potentially allow aircraft to get the best all-around performance (in terms of lift-induced drag reduction), at different angle-of-attack values. By using computational fluid dynamics, we study the influence of the winglet cant angle and sweep angle in the performance of a benchmark wing at a Mach number of 0.8395. The results obtained demonstrate that by carefully adjusting the cant angle, the aerodynamic performance can be improved at different angles of attack.

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“…It is worth mentioning that similar solutions have been already proposed, but most of them focused on the use of shape memory alloy materials [27][28][29][30][31][32], foldable wings during ground operations [33][34][35][36][37], load alleviation mechanisms [38][39][40][41][42], complaint surfaces [32,[43][44][45][46][47][48][49], and rotating systems for mitigating wingtip vortices [50][51][52][53][54]; but just a few of them have addressed variable cant angle winglets for drag reduction while flying [55][56][57][58][59].…”

Section: Aoamentioning

confidence: 99%

Variable cant angle winglets for improvement of aircraft flight performance

Guerrero

¹

,

Sanguineti

²

,

Wittkowski

³

2020

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Traditional winglets are designed as fixed devices attached at the tips of the wings. The primary purpose of the winglets is to reduce the lift-induced drag, therefore improving aircraft performance and fuel efficiency. However, because winglets are fixed surfaces, they cannot be used to control lift-induced drag reductions or to obtain the largest lift-induced drag reductions at different flight conditions (take-off, climb, cruise, loitering, descent, approach, landing, and so on). In this work, we propose the use of variable cant angle winglets which could potentially allow aircraft to get the best all-around performance (in terms of lift-induced drag reduction), at different flight phases. By using computational fluid dynamics, we study the influence of the winglet cant angle and sweep angle on the performance of a benchmark wing at Mach numbers of 0.3 and 0.8395. The results obtained demonstrate that by adjusting the cant angle, the aerodynamic performance can be improved at different flight conditions.

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“…Therefore, the winglet can be adjusted at different flight conditions to get the best lift-induced drag reduction for the given flight phase; or it can be kept in the vertical position while in ground so that it reduces wingspan while meeting gate and runaway clearance; or it can act as a load alleviation mechanism where in the case of gusts or strong sideslip velocities, the winglet can adjust itself, so it reduces the bending moment on the wing and the device itself. Similar solutions have been already proposed, but most of them focused on the use of shape memory alloy materials (20,21,22,23,24,25) , foldable wings during ground operations (26,27,28,29,30) , load alleviation mechanisms (31,32,33,34,35) , complaint surfaces (25,36,37,38,39,40) , and rotating systems for mitigating wingtip vortices (41,42,43,44,45) ; but just a few of them have addressed variable cant angle winglets for drag reduction while flying (41,47,48,49) .…”

Section: Introductionmentioning

confidence: 97%

Variable Cant Angle Winglets for Improvement of Aircraft Flight Performance

Guerrero¹,

Wittkowski²,

Sanguineti³

2019

Preprint

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Traditional winglets are designed as fixed devices attached at the tips of the wings. The primary purpose of the winglets is to reduce the lift-induced drag, therefore improving aircraft performance and fuel efficiency. However, because winglets are fixed surfaces, they cannot be used to control lift-induced drag reductions or to obtain the largest lift-induced drag reductions at different flight conditions (take-off, climb, cruise, loitering, descent, approach, landing, and so on). In this work, we propose the use of variable cant angle winglets which could potentially allow aircraft to get the best all-around performance (in terms of lift-induced drag reduction), at different flight phases. By using computational fluid dynamics, we study the influence of the winglet cant angle and sweep angle on the performance of a benchmark wing at Mach numbers of 0.3 and 0.8395. The results obtained demonstrate that by adjusting the cant angle, the aerodynamic performance can be improved at different flight conditions.

show abstract

Fiber-reinforced polymers with integrated shape memory alloy actuation: an innovative actuation method for aerodynamic applications

Cited by 14 publications

References 16 publications

CFD Study of the Impact of Variable Cant Angle Winglets on Total Drag Reduction

CFD Study of the Impact of Variable Cant Angle Winglets on Total Drag Reduction

Variable cant angle winglets for improvement of aircraft flight performance

Variable Cant Angle Winglets for Improvement of Aircraft Flight Performance

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