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US 4,285,636 AGranted
Vertical axis type wind power turbine
AssigneeGakko Hojin Tokai University
InventorsYoshio Kato, Kazuichi Seki, Yoshio Shimizu
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AssigneeGakko Hojin Tokai University
InventorsYoshio Kato, Kazuichi Seki, Yoshio Shimizu
Estimating the term…
Wind power turbines are largely divided into vertical axis type wind power turbines and propeller type (horizontal axis type) wind power turbines. The present invention discloses a vertical axis type wind power turbine. The airfoil of blades in this vertical axis type wind power turbine is formed in such manner that, denoting a proper position on the airfoil chord line as a camber reversing position, a camber having a downward convex curvature is given between said position and a leading edge and a camber having an upward convex curvature is given between said position and a trailing edge so as to be a mean line and a rational thickness distribution is given to this mean line. This vertical axis type wind power turbine is formed by keeping the spanwise direction of the above mentioned blade parallel with a vertical rotary axis and fitting a plurality of blades at regular intervals at a distance to the vertical rotary axis through respective supporting arms.
A vertical axis type wind powered turbine comprising a plurality of vertical blades of an airfoil form, each of said blades comprising a leading edge, a trailing edge, a cord line extending between said leading and said trailing edge and a mean camber line reversing position provided on said chord line between said leading and trailing edges, each of said blades further having a mean camber line having a radially inward curved convex curvature between said position and said leading edge and a mean camber line having a radially outward convex curvature between said position and said trailing edge and a rational thickness distribution is given to said mean camber line.
A vertical axis type wind power turbine comprising a plurality of blades of an airfoil form, each of said blades comprising a leading edge, a trailing edge, a cord line extending between said leading edge and said trailing edge and a mean camber line reversing position provided on said chord line between said leading and trailing edges, each of said blades further having a mean camber line having a radially inward convex curvature between said position and said leading edge and a mean camber line having a radially outward convex curvature between said position and said trailing edge and a rational thickness distribution is given to said mean camber line;
Dependencies are inferred from the claim text.