High-Lift Effect of Bionic Slat Based on Owl Wing

doi:10.1016/S1672-6529(13)60243-7

J4 ›› 2013, Vol. 10 ›› Issue (4): 456-463.doi: 10.1016/S1672-6529(13)60243-7

收稿日期:2013-01-16 修回日期:2013-09-06 出版日期:2013-09-09 发布日期:2013-10-10

High-Lift Effect of Bionic Slat Based on Owl Wing

Changjiang Ge, Luquan Ren, Ping Liang, Chengchun Zhang, Zhihui Zhang

Key Laboratory of Bionic Engineering (Ministry of Education, China), Jilin University, Changchun 130022, P. R. China

Received:2013-01-16 Revised:2013-09-06 Online:2013-09-09 Published:2013-10-10
Contact: Changjiang Ge E-mail:mygongbo@gmail.com
About author:Changjiang Ge, Luquan Ren, Ping Liang, Chengchun Zhang, Zhihui Zhang

摘要/Abstract

关键词: alula, bionic slat, high-lift effect, leading-edge separation, low Reynolds number

Abstract:

A slat without a cove is built on the basis of a bionic airfoil (i.e. stowed multi-element airfoil), which is extracted from a long-eared owl wing. The three-dimensional models with a deployed slat and a stowed slat are measured in a low-turbulence wind tunnel. The results are used to characterize high-lift effect: compared with the stowed slat, the deployed slat works more like a spoiler at low angles of attack, but like a conventional slat or slot at high angles of attack. In addition, it can also increase stall angle and maximum lift coefficient, and postpone the decrease in the gradient of the lift coefficient. At the same time, the flow field visualized around both three-dimensional models suggests the leading-edge separation associated with the decrease in the gradient of the lift coefficient. Furthermore, the related two-dimensional simulation well agrees with the analysis of the lift coefficient, as the complement to the experiment. The bionic slat may be used as reference in the design of leading-edge slats without a cove.

Key words: alula, bionic slat, high-lift effect, leading-edge separation, low Reynolds number

Changjiang Ge, Luquan Ren, Ping Liang, Chengchun Zhang, Zhihui Zhang. [J]. J4, 2013, 10(4): 456-463.

Changjiang Ge, Luquan Ren, Ping Liang, Chengchun Zhang, Zhihui Zhang. High-Lift Effect of Bionic Slat Based on Owl Wing[J]. J4, 2013, 10(4): 456-463.

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High-Lift Effect of Bionic Slat Based on Owl Wing

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