Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Radial flow devices
Reexamination Certificate
2005-05-31
2005-05-31
Verdier, Christopher (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Radial flow devices
C416SDIG002, C416SDIG005
Reexamination Certificate
active
06899524
ABSTRACT:
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.
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patent: 5417548 (1995-05-01), Tangler et al.
patent: 5562420 (1996-10-01), Tangler et al.
patent: 6039541 (2000-03-01), Parker et al.
patent: 6068446 (2000-05-01), Tangler et al.
“NREL Airfoil Families for HAWTs”, J.L. Tangler and D.M. Somers, National Technical Information Service, U.S. Department of Commerce, Jan. 1995.
Somers Dan M.
Tangler James L.
Midwest Research Institute
Verdier Christopher
White Paul J.
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