Bat flight generates complex aerodynamic tracks
(2007) In Science 316(5826). p.894-897- Abstract
- The flapping flight of animals generates an aerodynamic footprint as a time-varying vortex wake in which the rate of momentum change represents the aerodynamic force. We showed that the wakes of a small bat species differ from those of birds in some important respects. In our bats, each wing generated its own vortex loop. Also, at moderate and high flight speeds, the circulation on the outer ( hand) wing and the arm wing differed in sign during the upstroke, resulting in negative lift on the hand wing and positive lift on the arm wing. Our interpretations of the unsteady aerodynamic performance and function of membranous-winged, flapping flight should change modeling strategies for the study of equivalent natural and engineered flying... (More)
- The flapping flight of animals generates an aerodynamic footprint as a time-varying vortex wake in which the rate of momentum change represents the aerodynamic force. We showed that the wakes of a small bat species differ from those of birds in some important respects. In our bats, each wing generated its own vortex loop. Also, at moderate and high flight speeds, the circulation on the outer ( hand) wing and the arm wing differed in sign during the upstroke, resulting in negative lift on the hand wing and positive lift on the arm wing. Our interpretations of the unsteady aerodynamic performance and function of membranous-winged, flapping flight should change modeling strategies for the study of equivalent natural and engineered flying devices. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/168611
- author
- Hedenström, Anders LU ; Johansson, Christoffer LU ; Wolf, Marta LU ; von Busse, R ; Winter, Y and Spedding, G R
- organization
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Science
- volume
- 316
- issue
- 5826
- pages
- 894 - 897
- publisher
- American Association for the Advancement of Science (AAAS)
- external identifiers
-
- wos:000246369800039
- scopus:34248587767
- ISSN
- 1095-9203
- DOI
- 10.1126/science.1142281
- language
- English
- LU publication?
- yes
- id
- 7f7e473b-b1d4-45cf-a057-bc3ff9f7dc4e (old id 168611)
- date added to LUP
- 2016-04-01 16:41:09
- date last changed
- 2022-03-15 02:12:00
@article{7f7e473b-b1d4-45cf-a057-bc3ff9f7dc4e,
abstract = {{The flapping flight of animals generates an aerodynamic footprint as a time-varying vortex wake in which the rate of momentum change represents the aerodynamic force. We showed that the wakes of a small bat species differ from those of birds in some important respects. In our bats, each wing generated its own vortex loop. Also, at moderate and high flight speeds, the circulation on the outer ( hand) wing and the arm wing differed in sign during the upstroke, resulting in negative lift on the hand wing and positive lift on the arm wing. Our interpretations of the unsteady aerodynamic performance and function of membranous-winged, flapping flight should change modeling strategies for the study of equivalent natural and engineered flying devices.}},
author = {{Hedenström, Anders and Johansson, Christoffer and Wolf, Marta and von Busse, R and Winter, Y and Spedding, G R}},
issn = {{1095-9203}},
language = {{eng}},
number = {{5826}},
pages = {{894--897}},
publisher = {{American Association for the Advancement of Science (AAAS)}},
series = {{Science}},
title = {{Bat flight generates complex aerodynamic tracks}},
url = {{http://dx.doi.org/10.1126/science.1142281}},
doi = {{10.1126/science.1142281}},
volume = {{316}},
year = {{2007}},
}