Wind turbine rotor blade with vortex generators

Abstract

A wind turbine rotor blade with an airfoil having a suction side and a pressure side is provided. The airfoil comprises an inner airfoil portion and an outer airfoil portion, where the inner airfoil portion is comparatively thicker than the outer airfoil portion and provided with vortex generators. The thickness of the inner airfoil portion is between 30% and 80% of the inner airfoil portion's chord length, and the vortex generators are located at the suction side of the inner airfoil portion between 8% and 12% of the chord length, as measured from the leading edge of the airfoil portion.

1 .- 5 . (canceled) 
     
     
         6 . A wind turbine rotor blade, comprising:
 an airfoil having a suction side and a pressure side, the airfoil comprising an inner airfoil portion and an outer airfoil portion, where the inner airfoil portion is comparatively thicker than the outer airfoil portion, the thickness of the inner airfoil portion being between 30% and 80% of a inner airfoil portion's chord length; and   vortex generators at the suction side of the inner airfoil portion between 8% and 12% of the chord length, as measured from the leading edge of the airfoil portion.   
     
     
         7 . The wind turbine rotor blade as claimed in  claim 6 , wherein the thickness of the inner airfoil portion is between 40% and 65% of the chord length. 
     
     
         8 . The wind turbine rotor blade as claimed in  claim 6 , wherein all vortex generators are located at the same chord length. 
     
     
         9 . The wind turbine rotor blade as claimed in  claim 7 , wherein all vortex generators are located at the same chord length. 
     
     
         10 . The wind turbine rotor blade as claimed in  claim 6 , wherein vortex generators are present along the whole span of the inner airfoil portion. 
     
     
         11 . The wind turbine rotor blade as claimed in  claim 7 , wherein vortex generators are present along the whole span of the inner airfoil portion. 
     
     
         12 . The wind turbine rotor blade as claimed in  claim 8 , wherein vortex generators are present along the whole span of the inner airfoil portion. 
     
     
         13 . The wind turbine rotor blade as claimed in  claim 9 , wherein vortex generators are present along the whole span of the inner airfoil portion. 
     
     
         14 . A wind turbine, comprising:
 a rotor blade having
 an airfoil having a suction side and a pressure side, the airfoil comprising an inner airfoil portion and an outer airfoil portion, where the inner airfoil portion is comparatively thicker than the outer airfoil portion, the thickness of the inner airfoil portion being between 30% and 80% of a inner airfoil portion's chord length, and 
 vortex generators at the suction side of the inner airfoil portion between 8% and 12% of the chord length, as measured from the leading edge of the airfoil portion. 
   
     
     
         15 . The wind turbine as claimed in  claim 14 , wherein the thickness of the inner airfoil portion is between 40% and 65% of the chord length. 
     
     
         16 . The wind turbine as claimed in  claim 15 , wherein all vortex generators are located at the same chord length. 
     
     
         17 . The wind turbine as claimed in  claim 16 , wherein vortex generators are present along the whole span of the inner airfoil portion.