Gurney flap and T-strip alternativesin application to typical aircraft steer surface

• Autorzy: Sieradzki A.

Identyfikatory

DOI

10.5604/01.3001.0012.2491

• Języki publikacji: EN

Abstrakty

EN

Classic Gurney flap and double Gurney flap (called T-strip) are well-researched trailing edge modifications used in aerospace engineering. However, one of the inevitable effects of their use is the aerodynamic drag increase at low lift conditions, concerned as the major drawback of these solutions. This article presents Gurney flap and T-strip passive alternatives, which guarantee similar advantages in terms of e.g. lift enhancement, but without significant drag increase. Their aerodynamic analysis was performed on the application case of a typical symmetrical aircraft stabilizer with movable steer. Both solutions, consisting of plates nearly parallel to the direction of flow, were modelled as two-dimensional cases and CFD calculations were performed for specified range of angles of attack and steer deflections. Obtained aerodynamic characteristics allowed assessing the influence of selected modifications on the stabilizer effectiveness, as well as on hinge moment characteristics. The flow pattern changes in the presence of analysed devices were also investigated. In this way, performed analysis provided valuable information about the advantages and disadvantages of using of such devices in comparison to classic Gurney Flap and double Gurney flap. The results showed that using proposed solutions gives the possibility of significant reduction of the aerodynamic drag of the whole stabilizer at low lift conditions, while still maintaining favourable lift characteristics.

Słowa kluczowe

EN

CFD; steer; stabilizer; Gurney flap; T-strip

PL

CFD; stabilizator; listwa Gurneya; T-strip

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2018
• Tom: Vol. 25, No. 1
• Strony: 347--354
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Sieradzki A.

• Institute of Aviation Centre of New Technologies Krakowska Av. 110/114, 02-256 Warsaw, Poland tel.: [phone], fax: [phone]

Bibliografia

• [1] Bechert, D. W., Meyer, R., Hage, W., Drag reduction of airfoils with miniflaps. Can we learn from dragonflies?, AIAA-2000-2315, American Institute of Aeronautics and Astronautics, Reston 2000.
• [2] Cavanaugh, M. A., Robertson, P., Mason, W. H., Wind Tunnel Test of Gurney Flaps and T-Strips on an NACA 23012 Wing, AIAA-2007-4175, 25th AIAA Applied Aerodynamics Conference, American Institute of Aeronautics and Astronautics, Reston 2007.
• [3] Sieradzki, A., Gurney flap and T-strip influence on stabilizer aerodynamic effectiveness and hinge moment characteristics, Transactions of the Institute of Aviation, Vol. 245 (4), pp. 199-208, Warsaw 2016.
• [4] Stalewski, W., Sznajder, J., Computational investigations of active flow control on helicopter--rotor blades, Journal of KONES Powertrain and Transport, Vol. 21 (2), pp. 281-288, Warsaw 2014.
• [5] Stalewski, W., Rotorcraft Applications of Active Gurney Flap Investigated within the Clean-Sky Project COMROTAG, 41st European Rotorcraft Forum, The American Helicopter Society (AHS) International, Munich 2015.
• [6] Wiśniowski, W., Twenty years of light aircraft and safety program, Transactions of the Institute of Aviation, Vol. 236, No. 3, pp. 7-25, Warsaw 2014.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).