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Cooling-tower fan airfoils

United States Patent

6,899,524
May 31, 2005
View the Complete Patent at the US Patent & Trademark Office
Airfoils for Enhanced Wind Turbine and Cooling Tower Efficiency
A family of airfoils for a blade of a cooling-tower fan, is provided wherein the blade has a root region and a tip region, the family of airfoils comprises an airfoil (30) in the root region of the blade having a Reynolds number of 500,000, and an airfoil (20) in the tip region of the blade having a Reynolds number of 1,000,000, and wherein each airfoil is characterized by a maximum lift coefficient that is largely insensitive to roughness effects.
Tangler; James L. (Boulder, CO), Somers; Dan M. (Port Matilda, PA)
Midwest Research Institute (Kansas City, MO)
09/ 936,802
March 22, 2002