Force Generation Mechanisms by an Insect Wing in Hovering Motion with Different Flipping Schedules

Hamdani H. R., Aizaz A., Naqvi M. A.

JOURNAL OF APPLIED FLUID MECHANICS, cilt.10, sa.1, ss.433-445, 2017 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 10 Sayı: 1
  • Basım Tarihi: 2017
  • Doi Numarası: 10.18869/acadpub.jafm.73.238.26152
  • Dergi Adı: JOURNAL OF APPLIED FLUID MECHANICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.433-445
  • Orta Doğu Teknik Üniversitesi Kuzey Kıbrıs Kampüsü Adresli: Hayır

Özet

The aerodynamic force and the flow structure of a wing performing hovering motion at small Reynolds number (Re=4000). is calculated by computationally solving the 3D Navier-Stokes equations. The computations are performed for the hovering motion which consists of stroke 1, followed by the flipping motion for reversing the direction and then the stroke 2 (similar to stroke 1 but in the opposite direction). The intent of the study is to research the effects of different scheduling of the flip motion between the two strokes. At Re=4000, the delayed stall mechanism is noted during the azimuth rotation of a wing with a high value of CL due to stabilized Leading Edge Vortex. The lift contribution during the flip (pitch rotation for reversing the direction) for the complete stroke is not substantial. During a stroke, the wing encountered the wake from the previous stroke in which, the wake does not contribute positively.