Grogger Herwig A, Gossar Martin, Makovec Michael, Fritz Johannes, Neugebauer Katharina, Amann Frederik, Voelkl Bernhard
Engineering Department, University of Applied Sciences Joanneum, Alte Poststrasse 149, 8020 Graz, Austria.
Waldrappteam, 6162 Mutters, Austria.
J Ornithol. 2022;163(2):599-610. doi: 10.1007/s10336-021-01945-2. Epub 2022 Jan 19.
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, ), the cross-sectional area of the test section measures 2.5 m × 1.5 m. The maximum achievable flow speed is approximately 16 ms. 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.
The online version contains supplementary material available at 10.1007/s10336-021-01945-2.
已开发、建造并评估了一种用于鸟类生理飞行实验的鼓风式风洞。由于待研究的鸟类体型较大(北方白颊鹮),测试段的横截面积为2.5米×1.5米。可实现的最大流速约为16米/秒。该风洞有一个灵活的出口喷嘴,可提供上升和下降气流,以实现滑翔和爬升飞行。本文详细描述了风洞的布局、设计和建造,包括其控制。给出了测试段内气流的数值模拟和速度分布测量结果。除了自由射流边界处混合层中的非均匀流动区域外,测试段的速度分布非常均匀;局部速度与平均速度的偏差小于2%。测试段内的湍流强度测量值在1%至2%之间。作为一项限制条件,该项目的预算有限。四只北方白颊鹮被人工饲养并训练在风洞中飞行。
在线版本包含可在10.1007/s10336-021-01945-2获取的补充材料。