Sheng, W., Galbraith, R. and Coton, F. (2009) On the S809 airfoil's unsteady aerodynamics characteristics. Wind Energy, 12(8), pp. 752-767. (doi: 10.1002/we.331)
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Abstract
The S809 airfoil dynamic characteristics, which are based on the airfoil dynamic tests at the University of Glasgow, are presented in this paper. The airfoil tests include static, ramp-type (ramp-up and ramp-down) and oscillatory motions at Reynolds numbers of 1.0 × 10<sup>6</sup> and 1.5 × 10<sup>6</sup> with and without the sand-tripped leading edge. This study aimed to explore the unsteady aerodynamic features of the S809 airfoil, such as the progression of separation from leading edge to trailing edge, the large trailing edge separation before stalling, the stall onset inception and the re-attachment convection, and to provide some useful data for tuning/refining the semi-empirical dynamic stall (DS) models, such as the Leishman–Beddoes DS model or its variations. Experimental results show that the S809 airfoil has a complicated DS process that renders this airfoil a challenge for any modeller of the unsteady airloads. The leading-edge roughness has small effect on the static features, but significantly invokes earlier stall onset inception under dynamic conditions, while has small influence on the convective phase of the re-establishment of fully attached flow.
| Item Type: | Articles |
|---|---|
| Keywords: | S809, unsteady aerodynamics, dynamic stall |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Galbraith, Professor Roderick and Coton, Professor Frank |
| Authors: | Sheng, W., Galbraith, R., and Coton, F. |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TL Motor vehicles. Aeronautics. Astronautics |
| College/School: | College of Science and Engineering > School of Engineering > Autonomous Systems and Connectivity |
| Research Group: | Aerospace sciences |
| Journal Name: | Wind Energy |
| Publisher: | Wiley |
| ISSN: | 1095-4244 |
| ISSN (Online): | 1099-1824 |
| Published Online: | 15 April 2009 |
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