A low-cost wind tunnel for bird flight experiments.

Grogger, Herwig A; Gossar, Martin; Makovec, Michael; Fritz, Johannes; Neugebauer, Katharina; Amann, Frederik; Voelkl, Bernhard (2022). A low-cost wind tunnel for bird flight experiments. Journal of ornithology, 163(2), pp. 599-610. Springer 10.1007/s10336-021-01945-2

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A blower-type wind tunnel for physiological bird flight experiments has been developed, constructed and evaluated. Since the birds to be investigated are rather big (Northern Bald Ibis, Geronticus eremita), the cross-sectional area of the test section measures 2.5 m × 1.5 m. The maximum achievable flow speed is approximately 16 ms-1. The wind tunnel exhibits a flexible outlet nozzle to provide up- and downdraft to allow for gliding and climbing flights. The current paper describes in detail the layout, design and construction of the wind tunnel including its control. Numerical simulations of the flow and measurements of the velocity distribution in the test section are presented. Apart from a non-homogeneous flow region in the mixing layer at the boundaries of the free jet, the test section exhibits a very even velocity distribution; the local speed deviates by less than two percent from the mean velocity. The turbulence intensity inside the test section was measured to be between 1 and 2%. As a constraint, a limited budget was available for the project. Four northern bald ibises were hand-raised and trained to fly in the wind tunnel.

Supplementary Information

The online version contains supplementary material available at 10.1007/s10336-021-01945-2.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Veterinary Public Health Institute > Animal Welfare Division

UniBE Contributor:

Völkl, Bernhard

ISSN:

0021-8375

Publisher:

Springer

Language:

English

Submitter:

Pubmed Import

Date Deposited:

26 Apr 2022 13:30

Last Modified:

26 Apr 2022 13:39

Publisher DOI:

10.1007/s10336-021-01945-2

PubMed ID:

35464255

Uncontrolled Keywords:

Bird flight experiments Northern bald ibis Wind tunnel

BORIS DOI:

10.48350/169518

URI:

https://boris.unibe.ch/id/eprint/169518

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