A Study of Transport Aircraft High-Lift Design Approaches

Antunes, Alexandre P.; SIlva, Ricardo Galdino da; Luiz, João; Azevedo, F.

doi:10.2514/6.2007-38

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…Krueger flaps, on the other hand, were left mostly unimproved. 7 Several notable reports involving the aerodynamic design and analysis of Krueger flaps were published since the late '70s to date. 4,[8][9][10][11][12][13][14][15][16][17][18] To the authors' knowledge, only three of these publications demonstrate a systematic effort towards designing Krueger flaps.…”

Section: Introductionmentioning

confidence: 99%

Computational Design of a Krueger Flap Targeting Conventional Slat Aerodynamics

Akaydin¹,

Housman

Kiris

et al. 2016

22nd AIAA/CEAS Aeroacoustics Conference

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In this study, we demonstrate the design of a Krueger flap as a substitute for a conventional slat in a high-lift system. This notional design, with the objective of matching equivalent-mission performance on aircraft approach, was required for a comparative aeroacoustic study with computational and experimental components. We generated a family of high-lift systems with Krueger flaps based on a set of design parameters. Then, we evaluated the high-lift systems using steady 2D RANS simulations to find a good match for the conventional slat, based on total lift coefficients in free-air. Finally, we evaluated the mean aerodynamics of the high-lift systems with Krueger flap and conventional slat as they were installed in an open-jet wind tunnel flow. The surface pressures predicted with the simulations agreed well with experimental results.

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Section: Introductionmentioning

confidence: 99%

Computational Design of a Krueger Flap Targeting Conventional Slat Aerodynamics

Akaydin¹,

Housman

Kiris

et al. 2016

22nd AIAA/CEAS Aeroacoustics Conference

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Increase in high-lift devices efficiency of swept wing

Степанович

2020

Naučn. vestn. MGTU GA

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The use of Fowler flaps and slotted slats in sweptwing aircraft is the standard solution to increase wing lift at take off and landing. In the literature this solution is known as a classical option of high-lift system of commercial subsonic aircraft. The results of numerical and experimental studies of some solutions intended to increase the efficiency of classical high-lift devices are presented. The concept of the trailing-edge devices called "the adaptive flap" is considered as a way to improve flap efficiency. The adaptive concept is characterized by the integration of spoiler downward deflection to the Fowler flap function. Integration of the spoiler with a movable flap provided an increase of lift in the linear region due to flaps deflected to a higher angle. The steeper upwash angle at a leading-edge device may be the reason of an early stall of the main wing. To protect the leading edge a slotted Kruger flap with streamline form has been used. Preliminary design of classical and improved high-lift systems included the determination of aerodynamic shapes and the optimized position for the high-lift devices. Aerodynamic analysis and design were carried out using 2D RANS Navier-Stokes method. A comparison of computed results has shown visible aerodynamic advantages of an improved high-lift system for maximum lift coefficient and refining the behavior of stall characteristics at high angles of attack. The results of wind tunnel tests of aircraft model with adaptive flap showed its effectiveness.

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A Study of Transport Aircraft High-Lift Design Approaches

Cited by 2 publications

References 9 publications

Computational Design of a Krueger Flap Targeting Conventional Slat Aerodynamics

Computational Design of a Krueger Flap Targeting Conventional Slat Aerodynamics

Increase in high-lift devices efficiency of swept wing

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