Chapter 11

Multielement Airfoils for Wind Turbines

Adam M. Ragheb, Michael S. Selig,    University of Illinois at Urbana-Champaign, Urbana, IL, United States    Email:,


The thick root airfoils of modern wind turbines, with current technology designs reaching 45% thickness, are incapable of producing high lift, and as a consequence, the blades are aerodynamically and structurally suboptimal. Additionally, the road-transportable blade length is limited to between 53 and 62 m depending on the specific blade geometry. The use of multielement airfoil arrangements on utility-scale wind turbine blades has the potential to allow for (1) improving aerodynamics near the hub section, (2) improving the structural ...

Get Wind Energy Engineering now with the O’Reilly learning platform.

O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers.