Abstract
A 17% - thick, natural-laminar-flow airfoil, the S825, for the 75% blade radial station of 20- to 40-meter, variable-speed and variable-pitch (toward feather), horizontal-axis wind turbines has been designed and analyzed theoretically and verified experimentally in the NASA Langley Low-Turbulence Pressure Tunnel. The two primary objectives of high maximum lift, relatively insensitive to roughnessand low-profile drag have been achieved. The airfoil exhibits a rapid, trailing-edge stall, which does not meet the design goal of a docile stall. The constraints on the pitching moment and the airfoil thickness have been satisfied. Comparisons of the theoretical and experimental results generally show good agreement.
| Original language | American English |
|---|---|
| Number of pages | 89 |
| State | Published - 2005 |
Bibliographical note
Work performed by Airfoils, Inc., State College, PennsylvaniaNREL Publication Number
- NREL/SR-500-36346
Keywords
- airfoil design
- airfoils
- Pennsylvania State University
- wind energy
- wind turbine