Open AccessDesign and experimental results for the S814 airfoil
Author(s) -
D. M. Somers
Publication year - 1997
Language(s) - English
Resource type - Reports
DOI - 10.2172/437669
Subject(s) - airfoil , lift (data mining) , drag , aerodynamic center , wind tunnel , relative wind , pitching moment , lift to drag ratio , aerodynamics , lift coefficient , marine engineering , angle of attack , mechanics , turbulence , geology , structural engineering , physics , engineering , reynolds number , computer science , data mining
A 24-percent-thick airfoil, the S814, for the root region of a horizontal-axis wind-turbine blade has been designed and analyzed theoretically and verified experimentally in the low-turbulence wind tunnel of the Delft University of Technology Low Speed Laboratory, The Netherlands. The two primary objectives of high maximum lift, insensitive to roughness, and low profile drag have been achieved. The constraints on the pitching moment and the airfoil thickness have been satisfied. Comparisons of the theoretical and experimental results show good agreement with the exception of maximum lift which is overpredicted. Comparisons with other airfoils illustrate the higher maximum lift and the lower profile drag of the S814 airfoil, thus confirming the achievement of the objectives