Force Generation Mechanisms by an Insect Wing in Hovering Motion with Different Flipping Schedules
Publish place: Journal of Applied Fluid Mechanics، Vol: 10، Issue: 1
Publish Year: 1395
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JAFM-10-1_038
تاریخ نمایه سازی: 3 بهمن 1400
Abstract:
The aerodynamic force and the flow structure of a wing performing hovering motion at small Reynolds number (Re=۴۰۰۰) is calculated by computationally solving the ۳D Navier-Stokes equations. The computations are performed for the hovering motion which consists of stroke ۱, followed by the flipping motion for reversing the direction and then the stroke ۲ (similar to stroke ۱ 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=۴۰۰۰, 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.
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Authors
H. R. Hamdani
Aerospace Engineering Department, College of Aeronautical Engineering, National University of Sciences and Technology, Pakistan
A. Aizaz
Aerospace Engineering Department, College of Aeronautical Engineering, National University of Sciences and Technology, Pakistan
M. A. Naqvi
Aerospace Engineering Department, College of Aeronautical Engineering, National University of Sciences and Technology, Pakistan