Wind energy machine

A rotary machine driven by a flowstream comprising:

• a housing having a semi-cylindrical back wall, horizontal top and bottom walls, and a plurality of intake ducts opening across the front thereof;
• a cylindrical rotor in said housing;
• and
• a plurality of vertical vanes carried on and around said rotor to extend outward therefrom and spaced closely at their ends to said top and bottom walls;
• those ducts opening into said housing on one side of a front to back centerline of said rotor being formed and disposed to direct flow in a rotational direction generally along a chord of the front quadrant of said rotor on said one side, while those ducts on the other side are curved and disposed to bend the stream and direct flow back in said rotational direction generally along a chord of the front quadrant of said rotor on the other side of said centerline;
• said vanes being of airfoil configuration and being disposed so that flow over said vanes as directed from said ducts creates aerodynamic forces in said direction of rotation;
• said vanes being arranged in a series of rows thereof;
• each row being disposed from the outside toward the inside of said flanges with a narrow spacing between the trailing edge of one airfoil and the leading edge of the next forming an air velocity increasing slot.