Drag optimization for a transport aircraft mission adaptive wing

Martins, Andre Luiz; Catalano, Fernando Martini

doi:10.2514/6.2000-648

Cited by 9 publications

(5 citation statements)

References 1 publication

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“…At high-subsonic speed the selective displacement of an airfoil upper surface by less than 0.5 % of its chord is sufficient to introduce changes of the pressure distribution useful for tailoring the lift and drag coefficients. 7 This can be used to optimize the performance of an airfoil around a design point, for instance at cruise conditions. Asymmetric changes in the left and right wing can also be used to maneuver an aircraft without using ailerons.…”

Section: Introductionmentioning

confidence: 99%

Shape Change of the Upper Surface of an Airfoil by Macro Fiber Composite Actuators

Debiasi

Bouremel

Hee

et al. 2011

29th AIAA Applied Aerodynamics Conference

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Macro fiber composite actuators are used to displace inward or outward the upper surface of a NACA 4415 airfoil model. In the design discussed, these thin and light piezoelectric actuators are bonded to the inside and become an integral part of the skin of the upper-surface. Still-air and wind-tunnel measurements in different flow regimes were performed to assess the characteristics of static changes of the shape of the upper surface. The results obtained can be used to design a wing with morphing upper surfaces for improved aerodynamics, for maneuvering without ailerons, or for active control of the flow over the wing.

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Section: Introductionmentioning

confidence: 99%

Shape Change of the Upper Surface of an Airfoil by Macro Fiber Composite Actuators

Debiasi

Bouremel

Hee

et al. 2011

29th AIAA Applied Aerodynamics Conference

View full text Add to dashboard Cite

show abstract

“…The selective displacement of an airfoil upper surface by less than 0.5 % of its chord is sufficient to introduce changes of the pressure distribution useful for tailoring the lift and drag coefficients at high-subsonic speed. 7 This can be used to optimize the performance of an airfoil around a design point, for instance at cruise conditions. Asymmetric changes in the left and right wing can also be used to maneuver an aircraft without using ailerons.…”

Section: Introductionmentioning

confidence: 99%

Measurements of a Symmetric Airfoil Morphed by Macro Fiber Composite Actuators

Bouremel

Chan

Jones

et al. 2014

32nd AIAA Applied Aerodynamics Conference

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This study presents the geometric and aerodynamic properties of a symmetric airfoil model that uses macro fiber composite actuators to change the shape of its upper and lower surfaces. In the design discussed, these thin and light piezoelectric actuators are bonded to the inside and become an integral part of the skin of the upper and lower surfaces of the airfoil. Still-air and wind-tunnel measurements in different flow regimes are performed to assess the characteristics associated with the changes of the shape of the airfoil. The results obtained will be used to design and fabricate a wing with morphing surfaces for testing in a remote-controlled aircraft. Nomenclaturec = model chord C D = drag coefficient C L = lift coefficient C M = pitching-moment coefficient about c/4 D = drag force L = lift force l = local coordinate tangent to the airfoil surface n = local coordinate normal to the airfoil surface Re c = Reynolds number based on the chord s = model span (from wall to wall of the wind tunnel) U = flow velocity x = streamwise coordinate of the wind tunnel y = spanwise coordinate of the wind tunnel z = vertical coordinate of the wind tunnel Greek letters  = angle of attack of the airfoil  = axial (chordwise) coordinate of the airfoil  = normal coordinate of the airfoil Subscripts

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“…Numerous studies show that the transition between laminar and turbulent flows is influenced by the shape of the wing aerofoil (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14) . Aerodynamic studies from the beginning of aviation history show that for flight conditions characterised by given Mach number (M) and Reynolds number (Re), the airflow around a wing aerofoil is laminar at the leading edge but becomes turbulent at a certain point.…”

Section: Introductionmentioning

confidence: 99%

A hybrid fuzzy logic proportional-integral-derivative and conventional on-off controller for morphing wing actuation using shape memory alloy Part 2: Controller implementation and validation

Grigorie

Botez

Попов

et al. 2012

Aeronaut. j. (1968)

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Drag optimization for a transport aircraft mission adaptive wing

Cited by 9 publications

References 1 publication

Shape Change of the Upper Surface of an Airfoil by Macro Fiber Composite Actuators

Shape Change of the Upper Surface of an Airfoil by Macro Fiber Composite Actuators

Measurements of a Symmetric Airfoil Morphed by Macro Fiber Composite Actuators

A hybrid fuzzy logic proportional-integral-derivative and conventional on-off controller for morphing wing actuation using shape memory alloy Part 2: Controller implementation and validation

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