Effects of Gurney Flaps for Aerodynamic Characteristics of an Airfoil

DOI

Bibliographic Information

Other Title
  • 翼の空力特性に対するGurney Flap の効果

Abstract

Gurney Flaps are the high-lift devices with L shape beam used for high speed road vehicles since 1970s. This paper is for research about effects of the Gurney Flaps for aerodynamic characteristics of NACA4412 airfoil by wind-tunnel experiments. The flaps are 0, 1, 2, 3, 4, 5 and 6% of the camber length in height and are attached at the trailing edge. Reynolds number is 6.5x105. In the experiments, 4% height flap had the highest coefficient of lift among flaps showing same tendency of CL-a curve as that without a flap. Coefficient of drag increased as the mounted flap was bigger in same attack angle. The highest L/D was obtained by the airfoil without flap. L/D decreased as the mounted flap was bigger, and 4% flap showed 74% L/D of the original airfoil. As results, usages of Gurney Flaps is effective to get high coefficient of lift with small and light wings, or when CD increases within tolerance level under extra engine power.

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Details 詳細情報について

  • CRID
    1390001205593989504
  • NII Article ID
    130005020703
  • DOI
    10.11345/japannctam.61.0.202.0
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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