Wind turbine blade

Abstract

Disclosed is a blade including a blade body including a leading edge and a trailing edge, and at least one trailing edge cavity defined by a blade area disposed in at least partial alignment with the trailing edge, the at least one cavity extending a desired depth into said blade body in a direction of the leading edge.

1 . A blade comprising:
 a blade body including a leading edge and a trailing edge, said trailing edge being disposed at an edge area of said blade body that is thinner than a thickest area of said blade body; and   at least one trailing edge cavity defined by a blade area disposed in at least partial alignment with said trailing edge in proximity to said edge area, said at least one cavity extending a desired depth into said blade body in a direction of said leading edge.   
     
     
         2 . The of  claim 1 , wherein said at least one cavity is a concavity that is concave into said blade body in a direction of said leading edge. 
     
     
         3 . The blade of  claim 2 , wherein said concavity includes a curvature that extends in a longitudinal direction relative to a longitudinal extent of said blade body. 
     
     
         4 . The blade of  claim 2 , wherein said concavity includes a curvature that extends in a circumferential direction relative to a circumferential area of said blade body. 
     
     
         5 . The blade of  claim 2 , wherein said concavity includes a curvature that extends in a longitudinal direction relative to a longitudinal extent of said blade body and a curvature that extends in a circumferential direction relative to a circumferential area of said blade body. 
     
     
         6 . The blade of  claim 1 , wherein said trailing edge includes a seam line that is interrupted by said at least one cavity. 
     
     
         7 . The blade of  claim 1 , wherein said at least one cavity is disposed between a root end and a tip end of said blade body. 
     
     
         8 . The blade of  claim 1 , wherein said at least one cavity is multiple cavities that are each distinct from each other, and are disposed between a root end and a tip end of said blade body. 
     
     
         9 . The blade of  claim 1 , wherein said at least one cavity is two cavities disposed longitudinally parallel to each other, said two cavities adjoining at a seam line of said trailing edge. 
     
     
         10 . The blade of  claim 9 , wherein interior edges of said cavities are disposed along said seam line, and extend a greater distance away from said leading edge than opposing exterior edges of said regions of concavity. 
     
     
         11 . The blade of  claim 1 , wherein said at least one cavity is at least one depression including a depressed surface that is disposed to include at least one of a length and width relative to said trailing edge. 
     
     
         12 . The blade of  claim 11 , wherein said at least one depression includes a consistent depth across a length of said at least one depression. 
     
     
         13 . The blade of  claim 11 , wherein said at least one depression includes a consistent depth from said trailing edge across a width of said at least one depression. 
     
     
         14 . The blade of  claim 11 , wherein said at least one depression is disposed orthogonally to a chord of said blade body, and wherein said at least one depression is disposed orthogonally to at least a portion of a longitudinal extent of said blade body. 
     
     
         15 . The blade of  claim 11 , wherein said at least one depression includes a depression surface disposed at a depth into said blade body, said depth surface including a concavity into said blade body in a direction of said leading edge, said concavity including at least one of a curvature that extends in a longitudinal direction relative to a longitudinal extent of said blade body and a curvature that extends in a circumferential direction relative to a circumferential area of said blade body. 
     
     
         16 . The blade of  claim 1 , wherein said at least one cavity is triangular in shape, said triangular shape being defined by at least two sloping surfaces sloping along a length of said at least one cavity. 
     
     
         17 . The blade of  claim 1 , wherein said at least one cavity is triangular in shape, said triangular shape being defined by at least two sloping surfaces sloping along a width of said at least one cavity.