Three-dimensional simulation for fast forward flight of a calliope hummingbird.

Citation data:

Royal Society open science, ISSN: 2054-5703, Vol: 3, Issue: 6, Page: 160230

Publication Year:
2016
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Repository URL:
https://digitalcommons.georgefox.edu/bio_fac/95
PMID:
27429779
DOI:
10.1098/rsos.160230
PMCID:
PMC4929914
Author(s):
Song, Jialei; Tobalske, Bret W; Powers, Donald R; Hedrick, Tyson L; Luo, Haoxiang
Publisher(s):
The Royal Society
Tags:
Multidisciplinary; Aerodynamics and Fluid Mechanics; Biology; Ornithology
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article description
We present a computational study of flapping-wing aerodynamics of a calliope hummingbird (Selasphorus calliope) during fast forward flight. Three-dimensional wing kinematics were incorporated into the model by extracting time-dependent wing position from high-speed videos of the bird flying in a wind tunnel at 8.3 m s(-1). The advance ratio, i.e. the ratio between flight speed and average wingtip speed, is around one. An immersed-boundary method was used to simulate flow around the wings and bird body. The result shows that both downstroke and upstroke in a wingbeat cycle produce significant thrust for the bird to overcome drag on the body, and such thrust production comes at price of negative lift induced during upstroke. This feature might be shared with bats, while being distinct from insects and other birds, including closely related swifts.