Wind turbine airfoil family
Airfoils are provided for a wind turbine blade that is associated with a wind turbine hub. Each airfoil includes a blunt trailing edge, a substantially oval shaped suction side, and a substantially S-shaped pressure side. The airfoils decrease in cross-sectional area along the turbine blade in a direction extending away from the wind turbine hub.
1. A plurality of airfoils for a wind turbine blade, the wind turbine associated with a wind turbine hub, each airfoil comprising:
a leading edge;
a blunt trailing edge;
a chord line extending from the leading edge to the blunt trailing edge;
a substantially oval shaped suction side; and
a substantially S-shaped pressure side, wherein the plurality of airfoils decrease in cross-sectional area along the turbine blade in a direction extending away from the wind turbine hub;
wherein the substantially oval shaped suction sides comprise non-dimensional coordinate values of x/c and positive y/c within the ranges set forth in Tables 2, 4, 6, and 8, the x/c values representing locations on the chord lines in relation to the trailing edges and the positive y/c values representing distances from the chord lines to points on the suction sides;
wherein the substantially S-shaped pressure sides comprise non-dimensional coordinate values of x/c and negative y/c within the ranges set forth in Tables 2, 4, 6, and 8, the x/c values representing locations on the chord lines in relation to the trailing edges and the negative y/c values representing distances from the chord lines to points on the pressure sides.
2. The plurality of airfoils of claim 1 , wherein each substantially oval shaped suction side and substantially S-shaped pressure side does not intersect the chord line of the airfoil.
3. The plurality of airfoils of claim 1 , wherein each of the plurality of airfoils is connected by a smooth curve.
4. The plurality of airfoils of claim 1 , wherein each of the plurality of airfoils comprises a first width about the blunt trailing edge, a second width moving towards the leading edge, the second width being smaller than the first width, and a third width moving further towards the leading edge, the third width being larger than the first width.
5. The plurality of airfoils of claim 1 , wherein each of the plurality of airfoils comprises a curved leading edge.
6. The plurality of airfoils of claim 1 , each comprising an inboard region airfoil.
7. A wind turbine blade comprising:
an inboard region comprising a plurality of airfoils, each airfoil comprising:
a leading edge;
a chord line extending from the leading edge to the blunt trailing edge;
a blunt trailing edge;
a substantially oval shaped suction side; and
a substantially S-shaped pressure side, the plurality of airfoils decreasing in cross-sectional area along the turbine blade in a direction extending away from a wind turbine hub;
an outboard region; and
a tip region;
wherein the substantially oval shaped suction sides comprise non-dimensional coordinate values of x/c and positive y/c within the ranges set forth in Tables 2, 4, 6, and 8, the x/c values representing locations on the chord lines in relation to the trailing edges and the positive y/c values representing distances from the chord lines to points on the suction sides;
wherein the substantially S-shaped pressure sides comprise non-dimensional coordinate values of x/c and negative y/c within the ranges set forth in Tables 2, 4, 6, and 8, the x/c values representing locations on the chord lines in relation to the trailing edges and the negative y/c values representing distances from the chord lines to points on the pressure sides.
8. The wind turbine blade of claim 7 , wherein on each airfoil the substantially oval shaped suction side and the substantially S-shaped pressure side does not intersect its chord line.
9. The wind turbine blade of claim 7 , wherein each airfoil is connected by a smooth curve.
10. The wind turbine blade of claim 7 , wherein each airfoil comprises a first width about the blunt trailing edge, a second width moving towards the leading edge, the second width being smaller than the first width, and a third width moving further towards the leading edge, the third width being larger than the first width.
11. The wind turbine blade of claim 7 , wherein each airfoil comprises a curved leading edge.
12. The wind turbine blade of claim 7 , wherein the plurality of airfoils include:
a first airfoil having a radial location on the turbine blade between about 30 to 45% of a turbine blade rotor radius in a direction extending away from a wind turbine hub and a maximum thickness of about 30% of the first airfoil chord length;
a second airfoil having a radial location on the turbine blade between about 27 to 30% of turbine blade rotor radius in a direction extending away from a wind turbine hub and a maximum thickness of about 35% of the second airfoil chord length;
a third airfoil having a radial location on the turbine blade between about 23 to 27% of turbine blade rotor radius in a direction extending away from a wind turbine hub and a maximum thickness of about 40% of the third airfoil chord length; and
a fourth airfoil having a radial location on the turbine blade between about 21 to 24% of turbine blade rotor radius in a direction extending away from a wind turbine hub and the maximum thickness of about 45% of the fourth airfoil chord length.
13. The wind turbine blade of claim 7 , wherein a first of the plurality airfoils comprises a profile substantially in accordance with the ranges of non-dimensional coordinate values of x/c and y/c set forth in Table 2, the x/c values representing locations on the chord line in relation to the trailing edge and the y/c values representing distances from the chord line to points on the suction and pressure sides.
14. The wind turbine blade of claim 7 , wherein a second of the plurality airfoils comprises a profile substantially in accordance with the ranges of non-dimensional coordinate values of x/c and y/c set forth in Table 4, the x/c values representing locations on the chord line in relation to the trailing edge and the y/c values representing distances from the chord line to points on the suction and pressure sides.
15. The wind turbine blade of claim 7 , wherein a third of the plurality airfoils comprises a profile substantially in accordance with the ranges of non-dimensional coordinate values of x/c and y/c set forth in Table 6, the x/c values representing locations on the chord line in relation to the trailing edge and the y/c values representing distances from the chord line to points on the suction and pressure sides.
16. The wind turbine blade of claim 7 , wherein a fourth of the plurality airfoils comprises a profile substantially in accordance with the ranges of non-dimensional coordinate values of x/c and y/c set forth in Table 8, the x/c values representing locations on the chord line in relation to the trailing edge and the y/c values representing distances from the chord line to points on the suction and pressure sides.
17. A turbine blade having a plurality of airfoils, comprising:
a first airfoil comprising a profile with non-dimensional coordinate values of x/c and y/c within the ranges set forth in Table 2;
a second airfoil comprising a profile with non-dimensional coordinate values of x/c and y/c within the ranges set forth in Table 4;
a third airfoil comprising a profile with non-dimensional coordinate values of x/c and y/c within the ranges set forth in Table 6; and
a fourth airfoil comprising a profile with non-dimensional coordinate values of x/c and y/c within the ranges set forth in Table 8,
wherein for each airfoil the x/c values represent locations on a chord line for the airfoil in relation to its trailing edge and the y/c values represent distances from the chord line for the airfoil to points on its suction and pressure sides.