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Russian Aeronautics

, Volume 61, Issue 3, pp 331–339 | Cite as

Definition of Wingtip Devices Shape and Dimensions for a Subsonic Airliner

  • D. Gueraiche
  • S. A. PopovEmail author
  • Yu. A. Ryzhov
Flight Vehicle Design
  • 6 Downloads

Abstract

The results of flow field numerical simulation on the typical wing-body prototype of the modern DLR-F4 airliner under sub- and transonic compressible air flow are presented. Using the DLR-F4 CAD model, the effect of the wingtip end plate area and of the cant angle of a typical Whitcomb winglet is studied. The dependencies of the model lift-to-drag ratio increment on the flat wingtip end plate relative area and on the cant angle of an airfoil Whitcomb winglet are obtained. The concept of an elliptic winglet with a variable cant angle that similar to the winglet used on Airbus A350 is studied. A technique is developed for solving the multi-parameter design optimization task for the Whitcomb winglet, taking the maximum lift-to-drag ratio of the wing as a criterion for optimization.

Keywords

subsonic airliner Whitcomb winglet wingtip airfoil device induced drag 

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Copyright information

© Allerton Press, Inc. 2018

Authors and Affiliations

  1. 1.Moscow Aviation Institute (National Research University)MoscowRussia

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