F - Mech Eng,Light,Heat,Weapons – 03 – D
Patent
F - Mech Eng,Light,Heat,Weapons
03
D
F03D 3/06 (2006.01)
Patent
CA 2531270
A Savonius three bladed vertical axis wind turbine rotor has operational characteristics superior to those of conventional three bladed rotors. The blades have high curvature and a high skew factor, for example a curvature of greater than about 7:1 (preferably at least 5.5:1, e. g. 2:1 - 5:1 ), and a skew factor of greater than about .6 (preferably at least .7, e. g. about .75-.9). Preferably the rotor also includes at least one substantially vertical shaft, the blades operatively connected to the shaft. The rotor typically has an aspect ratio of at least about .8:1, preferably at least about 2:1 (with the aspect ratio of each blade about twice that of the rotor). The blades desirably comprise a plurality of substantially aligned spokes axially spaced along the shaft, each spoke comprising three generally radially extending ribs arcuately spaced from each other approximately 120 degrees. The rotor typically has a maximum power coefficient (Cp) of at least about twice that of an otherwise identical rotor with a skew factor of .5 or less. The Savonius rotor may be used in combination with a generator or other driven element, with a drive (which automatically increases the effective gear ratio as the rotational speed of the rotor increases) operatively connecting the generator to the rotor. The rotor may alternatively be connected to a propeller of a multihull wind powered boat.
Aldrich Aaron L.
Dexter Michael H.
Hascup Justin R.
Rotsky Brad A.
Vanderhye Robert A.
Na
Vanderhye Robert A.
LandOfFree
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