Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Radial flow devices
Patent
1994-11-18
1996-12-31
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Radial flow devices
416242, F01D 514
Patent
active
055888046
ABSTRACT:
An airfoil defining the shape of the blades of a vehicle engine-cooling fan assembly. The airfoil has a leading edge; a rounded, bulbous nose section adjacent the leading edge; a trailing edge; a curved pressure surface extending smoothly and without discontinuity from the nose section to the trailing edge; a curved suction surface extending smoothly and without discontinuity from the nose section to the trailing edge; and a thin aft section formed adjacent the trailing edge and between the pressure surface and the suction surface. The aft section has a camber at its location of maximum camber of between 5 and 12% of the chord of the airfoil. The nose section has a thickness which is greater than the thickness of the airfoil between the pressure surface and the suction surface, blends smoothly into the suction surface, and blends smoothly into the pressure surface via a first blend radius forming a convex surface extending from the nose section adjacent the leading edge and a second blend radius forming a concave surface extending from the convex surface to the pressure surface of the airfoil.
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International Search Report dated Apr. 25, 1996.
Neely Michael J.
Savage John R.
ITT Automotive Electrical Systems Inc.
Lewis J. Gordon
Look Edward K.
Sgantzos Mark
Twomey Thomas N.
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