Thrust generation caused by flapping airfoils in a biplane configuration
JOURNAL OF AIRCRAFT, cilt.40, sa.3, ss.509-515, 2003 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 40 Sayı: 3
- Basım Tarihi: 2003
- Doi Numarası: 10.2514/2.3124
- Dergi Adı: JOURNAL OF AIRCRAFT
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.509-515
- Orta Doğu Teknik Üniversitesi Adresli: Evet
Özet
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.