Transverse-Axis Turbine With Twisted Foils
First Claim
1. A turbine, for rotating responsive to a fluid flowing relative to the turbine wherein in use the turbine is oriented with its axis of rotation transverse to the fluid flow, the turbine comprising:
- at least two foils extending along the axis of rotation, wherein;
a) each foil has a mount end at one end of its span and a non-mount end at the other end of its span;
b) each foil has a twist about the axis of rotation of no less than about 180°
along its span;
c) one side of the foil section of each foil is generally concave and the other side of the foil section of the foil has an outer convex section, an intermediate concave section and an inner convex section; and
d) the length of the chord of the foil in the vicinity of the mount end is greater than the length of the chord of the foil in the vicinity of the non-mount end, whereby the profile of the turbine is generally tapered.
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Accused Products
Abstract
A turbine, suitable for use as a water or wind turbine, for generating rotary motion from fluid flow wherein the axis of rotation of the turbine is transverse to the direction of flow. The turbine has two foils, which may meet at the axis of rotation, and the turbine is helical and tapered. The turbine has a quasi-conical base. The non-mount end of the turbine is preferably tilted downstream with the turbine axis of rotation in the range of about 5° to 15° from perpendicular to the flow direction.
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Citations
19 Claims
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1. A turbine, for rotating responsive to a fluid flowing relative to the turbine wherein in use the turbine is oriented with its axis of rotation transverse to the fluid flow, the turbine comprising:
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at least two foils extending along the axis of rotation, wherein; a) each foil has a mount end at one end of its span and a non-mount end at the other end of its span; b) each foil has a twist about the axis of rotation of no less than about 180°
along its span;c) one side of the foil section of each foil is generally concave and the other side of the foil section of the foil has an outer convex section, an intermediate concave section and an inner convex section; and d) the length of the chord of the foil in the vicinity of the mount end is greater than the length of the chord of the foil in the vicinity of the non-mount end, whereby the profile of the turbine is generally tapered. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 19)
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18. The turbine of claim 18, wherein the turbine has a foam core.
Specification