Design and Experimental Results for the S827 Airfoil; Period of Performance: 1998--1999
A 21%-thick, natural-laminar-flow airfoil, the S827, for the 75% blade radial station of 40- to 50-meter, stall-regulated, horizontal-axis wind turbines has been designed and analyzed theoretically and verified experimentally in the NASA Langley Low-Turbulence Pressure Tunnel. The primary objective of restrained maximum lift has not been achieved, although the maximum lift is relatively insensitive to roughness, which meets the design goal. The airfoil exhibits a relatively docile stall, which meets the design goal. The primary objective of low profile drag has been achieved. The constraints on the pitching moment and the airfoil thickness have been satisfied. Comparisons of the theoretical and experimental results generally show good agreement with the exception of maximum lift, which is significantly underpredicted.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- AC36-99-GO10337
- OSTI ID:
- 15011672
- Report Number(s):
- NREL/SR-500-36345; AAF-4-14289-01; AAM-8-17232-01; TRN: US200507%%631
- Resource Relation:
- Other Information: PBD: 1 Jan 2005; Related Information: Work performed by Airfoils, Inc., State College, Pennsylvania
- Country of Publication:
- United States
- Language:
- English
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