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An aerodynamic profile and a wind turbine comprising a wind turbine blade with reduced sensitivity towards surface irregularities are provided. The invention is mainly directed towards pitch-regulated wind turbines, which are operated at variable rotor speed and have blades longer than about 30 mete

An aerodynamic profile and a wind turbine comprising a wind turbine blade with reduced sensitivity towards surface irregularities are provided. The invention is mainly directed towards pitch-regulated wind turbines, which are operated at variable rotor speed and have blades longer than about 30 meters.

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1. An aerodynamic profile for a wind turbine blade, said profile having a suction side and a pressure side, said suction side and said pressure side being connected at a leading edge and a trailing edge thereby forming a continuous outer surface of the profile, said profile further having a thicknes

1. An aerodynamic profile for a wind turbine blade, said profile having a suction side and a pressure side, said suction side and said pressure side being connected at a leading edge and a trailing edge thereby forming a continuous outer surface of the profile, said profile further having a thickness, a camber line, and a chord line, wherein said camber line of the profile deviates from said chord line,the leading edge has a rounded shape, andthe thickness at 2 chord-% of the leading edge being t2%C>7% of the chord, and t2%C8% of the chord and t3%C5% of the chord and t1%C>7% of the chord. 3. An aerodynamic profile for a wind turbine blade, said profile having a suction side and a pressure side, said suction side and said pressure side being connected at a leading edge and a trailing edge, thereby forming a continuous outer surface of the profile, said profile further having a thickness, a camber line, and a chord line, wherein said camber line of the profile deviates from said chord line,the leading edge has a rounded shape, andthe profile between 0.25 chord-% and 2 chord-% of the profile is within a range between a radius curvature of 4% of the chord and a radius curvature of 10% of the chord. 4. An aerodynamic profile for a wind turbine blade, said profile having a suction side and a pressure side, said suction side and said pressure side being connected at a leading edge and a trailing edge, thereby forming a continuous outer surface of the profile, said profile further having a thickness, a camber line, and a chord line, wherein said camber line of the profile deviates from said chord line,the leading edge has a rounded shape, andthe profile between 0.25 chord-% and 1 chord-% of the profile is within a range between a radius curvature of 3.5% of the chord and a radius curvature of 9% of the chord. 5. An aerodynamic profile for a wind turbine blade, said profile having a suction side and a pressure side, said suction side and said pressure side being connected at a leading edge and a trailing edge, thereby forming a continuous outer surface of the profile, said profile further having a thickness, a camber line, and a chord line, wherein said camber line of the profile deviates from said chord line,the leading edge has a rounded shape, andfor at least one position between 50%-chord and 80%-chord of said profile the slope of the suction side of the profile is between a first linear interpolation between −9% at 50%-chord to −16% at 80%-chord and a second linear interpolation between −4.5% at 50%-chord and −8% at 80%-chord. 6. An aerodynamic profile for a wind turbine blade, said profile having a suction side and a pressure side, said suction side and said pressure side being connected at a leading edge and a trailing edge thereby forming a continuous outer surface of the profile, said profile further having a thickness, a camber line, and a chord line, wherein said camber line of the profile deviates from said chord line,the leading edge has a rounded shape, andfor at least one position between 50%-chord and 80%-chord of said profile the slope of the suction side of the profile is between a first linear interpolation between −8% at 50%-chord to −14% at 80%-chord and a second linear interpolation between −5% at 50%-chord and −8.5% at 80%-chord. 7. The aerodynamic profile according to claim 1, wherein the profile thickness is less than 18% of the chord. 8. An aerodynamic profile for a wind turbine blade, said profile having a suction side and a pressure side, said suction side and said pressure side being connected at a leading edge and a trailing edge thereby forming a continuous outer surface of the profile, said profile further having a thickness, a camber line, and a chord line, wherein said camber line of the profile deviates from said chord line,the leading edge has a rounded shape,the profile between 0.25 chord-% and 2 chord-% of the profile is within a range between a radius curvature of 2% of the chord and a radius curvature of 8% of the chord, andfor at least one position between 50%-chord and 80%-chord of said profile the slope of the suction side of the profile is between a first linear interpolation between −11% at 50%-chord to −18% at 80%-chord and a second linear interpolation between −4.5% at 50%-chord and −8% at 80%-chord. 9. An aerodynamic profile for a wind turbine blade, said profile having a suction side and a pressure side, said suction side and said pressure side being connected at a leading edge and a trailing edge thereby forming a continuous outer surface of the profile, said profile further having a thickness, a camber line, and a chord line, wherein said camber line of the profile deviates from said chord line,the leading edge has a rounded shape,the profile between 0.25 chord-% and 2 chord-% of the profile is within a range between a radius curvature of 4% of the chord and a radius curvature of 10% of the chord, andfor at least one position between 50%-chord and 80%-chord of said profile the slope of the suction side of the profile is between a first linear interpolation between −14% at 50%-chord to −20% at 80%-chord and a second linear interpolation between −6% at 50%-chord and −10% at 80%-chord. 10. The aerodynamic profile according to claim 8, wherein the profile thickness is less than 24% of the chord. 11. A wind turbine blade comprising a profile according to claim 1, wherein the profile is arranged in the outer 25 radius-% of the blade. 12. A wind turbine blade comprising a profile according to claim 1 for at least 20 radius-% of the blade. 13. A wind turbine blade comprising a profile according to claim 1 for at least 40 radius-% of the blade. 14. The wind turbine blade according to claim 11 further having a low radius specific solidity. 15. The wind turbine blade according to claim 11, wherein said wind turbine blade comprises carbon fibres. 16. The wind turbine blade according to claim 15, wherein carbon fibres are the main reinforcement fibres in at least one section of the wind turbine blade. 17. The wind turbine blade according to claim 15, wherein the carbon fibres are provided as pultruded or belt pressed cured members. 18. A wind turbine comprising a wind turbine blade according to claim 11. 19. Use of an aerodynamic profile according to claim 1 for a wind turbine having reduced sensitivity towards surface irregularities. 20. Use of an aerodynamic profile according to claim 1 for a wind turbine with blades having a low radius specific solidity. 21. Use of an aerodynamic profile according to claim 1 for a wind turbine operable by pitch regulation, variable rotor speed and having a rotor diameter of at least 60 meters, preferably at least 80 meters. 22. The aerodynamic profile according to claim 1, wherein the thickness at 2 chord-% of the leading edge being t2%C>7.5% of the chord and t2%C8.5% of the chord and t3%C5.3% of the chord and t1%C<6.7% of the chord. 25. The aerodynamic profile according to claim 3, wherein the profile between 0.25 chord-% and 2 chord-% of the profile is within a radius curvature of 4.5% of the chord and a radius curvature of 9% of the chord. 26. The aerodynamic profile according to claim 4, wherein the profile between 0.25 chord-% and 1 chord-% of the profile is between a radius curvature of 4% of the chord and a radius curvature of 8% of the chord. 27. The aerodynamic profile according to claim 5, wherein at least a quarter of the range 50%-chord to 80%-chord of said profile is between said first linear interpolation and said second linear interpolation. 28. The aerodynamic profile according to claim 5, wherein at least half of the range 50%-chord to 80%-chord of said profile is between said first linear interpolation and said second linear interpolation. 29. The aerodynamic profile according to claim 5, wherein at least 90% of the range 50%-chord to 80%-chord of said profile is between said first linear interpolation and said second linear interpolation. 30. The aerodynamic profile according to claim 5, wherein substantially all of the range 50%-chord to 80%-chord of said profile is between said first linear interpolation and said second linear interpolation. 31. The aerodynamic profile according to claim 6, wherein at least a quarter of the range 50%-chord to 80%-chord of said profile is between said first linear interpolation and said second linear interpolation. 32. The aerodynamic profile according to claim 6, wherein at least half of the range 50%-chord to 80%-chord of said profile is between said first linear interpolation and said second linear interpolation. 33. The aerodynamic profile according to claim 6, wherein at least 90% of the range 50%-chord to 80%-chord of said profile is between said first linear interpolation and said second linear interpolation. 34. The aerodynamic profile according to claim 6, wherein substantially all of the range 50%-chord to 80%-chord of said profile is between said first linear interpolation and said second linear interpolation. 35. The aerodynamic profile according to claim 7, wherein the profile thickness is below 17% of the chord. 36. The aerodynamic profile according to claim 7, wherein the profile thickness is between 13% of the chord and 16% of the chord. 37. The aerodynamic profile according to claim 8, wherein at least a quarter of the range 50%-chord to 80%-chord of said profile is between said first linear interpolation and said second linear interpolation. 38. The aerodynamic profile according to claim 8, wherein at least half of the range 50%-chord to 80%-chord of said profile is between said first linear interpolation and said second linear interpolation. 39. The aerodynamic profile according to claim 8, wherein at least a 90% of the range 50%-chord to 80%-chord of said profile is between said first linear interpolation and said second linear interpolation. 40. The aerodynamic profile according to claim 8, wherein substantially all of the range 50%-chord to 80%-chord of said profile is between said first linear interpolation and said second linear interpolation. 41. The aerodynamic profile according to claim 9, wherein at least a quarter of the range 50%-chord to 80%-chord of said profile is between said first linear interpolation and said second linear interpolation. 42. The aerodynamic profile according to claim 9, wherein at least half of the range 50%-chord to 80%-chord of said profile is between said first linear interpolation and said second linear interpolation. 43. The aerodynamic profile according to claim 9, wherein at least a 90% of the range 50%-chord to 80%-chord of said profile is between said first linear interpolation and said second linear interpolation. 44. The aerodynamic profile according to claim 9, wherein substantially all of the range 50%-chord to 80%-chord of said profile is between said first linear interpolation and said second linear interpolation. 45. The aerodynamic profile according to claim 10, wherein the profile thickness is more than 13% of the chord and less than 24% of the chord. 46. The aerodynamic profile according to claim 10, wherein the profile thickness is more than 13% of the chord and less than 18% of the chord. 47. The wind turbine blade of claim 12, wherein at least 20 radius-% having said profile is arranged in the outermost 50 radius-% of the blade. 48. The wind turbine blade of claim 13, wherein at least 40 radius-% having said profile is utilised between blade radius r=30-90% of the rotor radius R.