Abstract
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 relativelyinsensitive 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 maximumlift, which is significantly underpredicted.
| Original language | American English |
|---|---|
| Number of pages | 84 |
| State | Published - 2005 |
Bibliographical note
Work performed by Airfoils, Inc., State College, PennsylvaniaNREL Publication Number
- NREL/SR-500-36345
Keywords
- airfoil design
- airfoils
- Pennsylvania State University
- wind energy
- wind turbine