F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
F04D 29/38 (2006.01) F04D 29/68 (2006.01)
Patent
CA 2361801
A family of airfoils (20, 30) for a blade of a cooling-tower fan is provided wherein the blade has a root region and a tip region, and 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 of 1,000,000, and wherein each airfoil is characterized by a maximum lift coefficient that is largely insensitive to roughness effects.
L'invention concerne un ensemble de profils (20, 30) pour une ailette, présentant une base et un haut, d'un ventilateur à refroidissement. L'ensemble de profils comprend un profil (30) au niveau de la base de l'ailette ayant un nombre Reynolds de 500.000 et un profil (20) au haut de l'ailette ayant un nombre Reynolds de 1.000.000. Chaque profil est caractérisé par un coefficient d'élévation maximum qui est quasiment insensible aux effets d'irrégularité.
S0mers Dan M.
Tangler James L.
Finlayson & Singlehurst
Midwest Research Institute
S0mers Dan M.
LandOfFree
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