Design and Experimental Results for the S827 Airfoil; Period of Performance: 1998--1999

Somers, D. M.

National Renewable Energy Laboratory (U.S.)

关键词: Wind Turbines;    Thickness;    Wind Power Airfoils;    Roughness;    Nasa;   

DOI  :  10.2172/15011672
RP-ID  :  NREL/SR-500-36345
RP-ID  :  AC36-99-GO10337
RP-ID  :  15011672

美国|英语

来源: UNT Digital Library

【 摘 要 】

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.