Thrust generation caused by flapping airfoils in a biplane configuration

Tuncer I. , Kaya M.

JOURNAL OF AIRCRAFT, cilt.40, sa.3, ss.509-515, 2003 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 40 Konu: 3
  • Basım Tarihi: 2003
  • Doi Numarası: 10.2514/2.3124
  • Sayfa Sayıları: ss.509-515


Unsteady, viscous flows over flapping airfoils in a biplane configuration are computed on moving overset grids. The overset grid solutions are obtained in parallel in a distributed memory environment. Unsteady flowfields are described by particle traces: Time-averaged thrust values are obtained from the integration of the unsteady drag coefficient. It is shown that airfoils in a biplane configuration and oscillating in a combined pitch and plunge motion with a proper phase shift between them produce 20-40% more thrust than a single flapping airfoil. Turbulence in the flow further augments the thrust generation. For a maximum thrust at a given flapping frequency, an optimization of the flapping motion parameters is needed.