Variable Camber Compliant Wing - Design

Joo, James J.; Marks, Christopher R.; Zientarski, Lauren; Culler, Adam J.

doi:10.2514/6.2015-1050

Cited by 54 publications

(29 citation statements)

References 7 publications

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“…Modern research for aircraft structures and actuation mechanisms has resulted in the development of new methods for creating changes in camber or initiating flap deflections. For example, the Air Force Research Lab has developed a variablecamber compliant wing (VCCW), capable of changing camber from a NACA 2412 to a NACA 8412 through the use of an embedded actuator [1,2]. A similar technology, currently under development at NASA, is the variable camber compliant trailing edge (VCCTE) [3,4], which can produce variable flap geometries from a series of incremental flap sections.…”

Section: Introductionmentioning

confidence: 99%

Geometric Definition and Ideal Aerodynamic Performance of Parabolic Trailing-Edge Flaps

F¹,

T²,

J³

2019

Int J Astronaut Aeronautical Eng

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A parabolic trailing-edge flap is defined as a parabolic deflection of the airfoil geometry aft of a hinge point. Whereas a traditional flap deflection causes a discontinuous camber-line slope at the hinge point, a parabolic deflection produces a camber line that is first-order continuous at the hinge point. The geometry manipulation of a parabolic flap is mathematically defined such that it can be applied to any airfoil with a known camber line and thickness distribution. Small-angle and small-camber approximations are used to find analytical predictions for the ideal section flap effectiveness as well as the section pitching moment in comparison to a traditional flap. Results of the parabolic flap are compared to those of a traditional flap producing equivalent lift using thin airfoil theory and the vortex-panel method. It is shown that the ideal section flap effectiveness for a parabolic flap can be 33-50% higher than that of a traditional flap, depending on the flap-chord fraction. Additionally, a parabolic flap will produce a change in pitching moment 5-50% greater than that of a traditional flap for a given change in lift. Results may be applied in the design of modern morphing wings, for which complex flap deflections can be produced.

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Section: Introductionmentioning

confidence: 99%

Geometric Definition and Ideal Aerodynamic Performance of Parabolic Trailing-Edge Flaps

F¹,

T²,

J³

2019

Int J Astronaut Aeronautical Eng

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“…Superior aerodynamic performance of seamless skin variable camber wing due to morphing leading edge and trailing edge and span wise wing twist has been demonstrated by Joo et al's VCCW concept through wind tunnel testing (seen in Fig. 1(a)) [7,8]. a) b) Fig.…”

mentioning

confidence: 83%

“…Several morphing concepts, such as Mission Adaptive Wing in 1980s [4], Smart Wing Program in 1990s [5], Mission Adaptive Compliant Wing in 2000s [6] and a very recent Variable Camber Compliant Wing (VCCW) concept by the Air Force Research Laboratory (AFRL) [7,8], have been proposed. Other advantages of morphing wing technologies have also been verified by wind tunnel tests and flight tests in the above programs and other researchers' work.…”

mentioning

confidence: 99%

Preliminary airfoil design of an innovative adaptive variable camber compliant wing

Li¹,

Ang²

2016

J. vibroeng.

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In this study, an innovative adaptive variable camber compliant wing, with skin that can change thickness and tailing edge morphing mechanism that is designed based on a new kind of artificial muscles, is designed. Consisted of a compliant base plate and seamless and continuous compliant skin with the artificial muscles embedded in, this trailing edge morphing mechanism is extremely light in weight and efficient in reconfiguration of the wing sectional profile. To demonstrate the feasibility of this design, a simulative experiment of this kind of artificial muscles was designed and carried out. A demonstrative wing section with simulative driving skin mechanism and the compliant skin was manufactured. The demonstration wing section shows that the trailing edge morphing mechanism designed and simulative driving skin work good, with a -30°/+30° trailing edge morphing achieved. Targeting this innovative design, an airfoil design approach, employing CST parametric methodology, XFOIL and Multi-Objective Particle Swarm (MOPS) optimizer, is developed for the preliminary design of this innovative wing. A new selector is introduced to facilitate the searching process and improve the robustness of this method. The results show that this method is capable of designing airfoils for this special wing in a quick and effective way.

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“…The specific design of the model is covered more in two companion papers. 1,11 The flexible composite material, used to allow the high range of motion during camber changes, proved to be difficult to model within FEA and was the limiting factor in this analysis. A 1 ft version FEA model was built to verify the desired shapes, and while this particular FEA model did not include all of the skin material, it was still able to match the desired camber shapes.…”

Section: B Finite Element Analysismentioning

confidence: 99%

Fluid-Structure Interaction of a Variable Camber Compliant Wing

Miller

2015

53rd AIAA Aerospace Sciences Meeting

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This paper presents results for a loosely-coupled fluid-structure interaction (FSI) of a flexible wing using FUN3D to compute the aerodynamic flow-field and Abaqus to calculate the structural deformation. NASA Langley also provides a general 3D algorithm to interpolate between dissimilar meshes which is used here to map pressures and displacements between the aerodynamic and structural codes. This method is applied to the AFRLdeveloped "Variable Camber Compliant Wing" (VCCW), which is an adaptable wing designed target airfoil shapes between a NACA 2410 and 8410. Results will be compared to experiments conducted in the AFRL Vertical Wind Tunnel.

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Variable Camber Compliant Wing - Design

Cited by 54 publications

References 7 publications

Geometric Definition and Ideal Aerodynamic Performance of Parabolic Trailing-Edge Flaps

Geometric Definition and Ideal Aerodynamic Performance of Parabolic Trailing-Edge Flaps

Preliminary airfoil design of an innovative adaptive variable camber compliant wing

Fluid-Structure Interaction of a Variable Camber Compliant Wing

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