초록 ▼

A swept wind turbine blade (20) includes a blade body (24) extending along a length between a root (26) and a tip (28) of the blade (20). A pitch axis (36) extends through the root (26) of the blade (20). A reference line (48) defines a deviation from the pitch axis (36) and corresponds to a swept s

A swept wind turbine blade (20) includes a blade body (24) extending along a length between a root (26) and a tip (28) of the blade (20). A pitch axis (36) extends through the root (26) of the blade (20). A reference line (48) defines a deviation from the pitch axis (36) and corresponds to a swept shape of the blade (20) along its length. The reference line (48) has a zero sweep at the root (26), a zero slope at the root (26), and a positive curvature (66) along a segment within 25% of the length from the root (26) to the tip (28) of the blade (20).

대표청구항 ▼

1. A swept wind turbine blade comprising: a blade body extending along a length between a root and a tip of the blade;a pitch axis extending through the root of the blade;a reference line defining a deviation from the pitch axis corresponding to a swept shape of the blade along its length;wherein th

1. A swept wind turbine blade comprising: a blade body extending along a length between a root and a tip of the blade;a pitch axis extending through the root of the blade;a reference line defining a deviation from the pitch axis corresponding to a swept shape of the blade along its length;wherein the reference line comprises: a zero sweep at the root;a zero slope at the root;a positive curvature along a segment within 25% of the length from the root to the tip of the blade;wherein the reference line comprises a positive curvature at the root. 2. The swept wind turbine blade of claim 1, wherein the reference line further comprises: a first curvature defined by a first function along a first portion of the length;a second curvature defined by a second function different from the first function along a second portion of the length adjoining the first function at a transition point;wherein a slope of the first curvature and a slope of the second curvature are equal at the transition point. 3. The swept wind turbine blade of claim 1, wherein the reference line further comprises: a first curvature defined by a first function along a first portion of the length;a second curvature defined by a second function different from the first function along a second portion of the length adjoining the first function at a transition point; wherein a slope of the first curvature and a slope of the second curvature are equal at the transition point. 4. The swept wind turbine blade of claim 3, wherein the first curvature extends from a point on a segment having a zero slope forward of the root. 5. The swept blade of claim 1, further comprising a negative curvature outboard from the positive curvature along the length. 6. The swept wind turbine blade of claim 1, wherein the reference line comprises a member selected from the group consisting of an elastic axis, a quarter chord line, a center of mass line, a shear center line, a leading edge line, and a trailing edge line of the blade. 7. A wind turbine rotor comprising the swept blade of claim 1. 8. A swept wind turbine blade comprising: a blade body extending along a length between a root and a tip of the blade;a pitch axis extending through the root of the blade;a reference line defining a deviation from the pitch axis corresponding to a swept shape of the blade along its length;wherein the reference line comprises: a zero sweep at the root;a zero slope at the root;a positive curvature along a segment within 25% of the length from the root to the tip of the blade;wherein the reference line further comprises:a first curvature defined by a first function along a first portion of the length;a second curvature defined by a second function different from the first function along a second portion of the length adjoining the first function at a transition point;wherein the first curvature and the second curvature each terminate at the transition point and have an equivalent curvature.