Wind turbine airfoil family

1. A plurality of airfoils for a wind turbine blade, the wind turbine comprising 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 set forth in Tables 1-4, the x/c values representing locations on the chord line in relation to the trailing edges and the positive y/c values representing heights from the chord line to points on the suction sides.

2. The plurality of airfoils of claim 1 , wherein the substantially oval shaped suction sides and the substantially S-shaped pressure sides do not intersect the chord line.

3. The plurality of airfoils of claim 1 , wherein the substantially S-shaped pressure sides comprise non-dimensional coordinate values of x/c and negative y/c set forth in Tables 1-4, the x/c values representing locations on the chord line in relation to the trailing edges and the negative y/c values representing heights from the chord line to points on the pressure sides.

4. The plurality of airfoils of claim 1 , wherein each of the plurality of airfoils is connected by a smooth curve.

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 , wherein a first of the plurality airfoils comprises a profile substantially in accordance with non-dimensional coordinate values of x/c and y/c set forth in Table 1, the x/c values representing locations on the chord line in relation to the trailing edge and the y/c values representing heights from the chord line to points on the suction and pressure sides.

7. The plurality of airfoils of claim 1 , wherein a second of the plurality airfoils comprises a profile substantially in accordance with 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 heights from the chord line to points on the suction and pressure sides.

8. The plurality of airfoils of claim 1 , wherein a third of the plurality airfoils comprises a profile substantially in accordance with non-dimensional coordinate values of x/c and y/c set forth in Table 3, the x/c values representing locations on the chord line in relation to the trailing edge and the positive y/c values representing heights from the chord line to points on the suction and pressure sides.

9. The plurality of airfoils of claim 1 , wherein a fourth of the plurality airfoils comprises a profile substantially in accordance with 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 heights from the chord line to points on the suction and pressure sides.

10. A turbine blade having a plurality of airfoils, comprising:

a first airfoil;

the first airfoil comprising a profile substantially in accordance with non-dimensional coordinate values of x/c and y/c set forth in Table 1;

a second airfoil;

the second airfoil comprising a profile substantially in accordance with non-dimensional coordinate values of x/c and y/c set forth in Table 2;

a third airfoil;

the third airfoil comprising a profile substantially in accordance with non-dimensional coordinate values of x/c and y/c set forth in Table 3; and

a fourth airfoil;

the fourth airfoil comprising a profile substantially in accordance with non-dimensional coordinate values of x/c and y/c set forth in Table 4,

each airfoil comprising a chord line extending from a leading edge to a blunt trailing edge of the airfoil, the values of x/c representing locations on the chord line in relation to the trailing edge and the values of y/c representing heights from the chord line to points on the suction and pressure sides.

11. The turbine blade of claim 10 , wherein the values of x/c and y/c are scalable as a function of the same constant or number to provide a scaled up or scaled down airfoil.

12. The turbine blade of claim 10 , wherein the plurality of airfoils are connected by a smooth curve.

13. A plurality of airfoils for a wind turbine blade, the wind turbine comprising 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 S-shaped pressure sides comprise non-dimensional coordinate values of x/c and negative y/c set forth in Tables 1-4, the x/c values representing locations on the chord line in relation to the trailing edges and the negative y/c values representing heights from the chord line to points on the pressure sides.

14. The plurality of airfoils of claim 13 , wherein the substantially oval shaped suction sides and the substantially S-shaped pressure sides do not intersect the chord line.

15. The plurality of airfoils of claim 13 , wherein each of the plurality of airfoils is connected by a smooth curve.

16. The plurality of airfoils of claim 13 , wherein each of the plurality of airfoils comprises a curved leading edge.

17. The plurality of airfoils of claim 13 , wherein a first of the plurality airfoils comprises a profile substantially in accordance with non-dimensional coordinate values of x/c and y/c set forth in Table 1, the x/c values representing locations on the chord line in relation to the trailing edge and the y/c values representing heights from the chord line to points on the suction and pressure sides.

18. The plurality of airfoils of claim 13 , wherein a second of the plurality airfoils comprises a profile substantially in accordance with 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 heights from the chord line to points on the suction and pressure sides.

19. The plurality of airfoils of claim 13 , wherein a third of the plurality airfoils comprises a profile substantially in accordance with non-dimensional coordinate values of x/c and y/c set forth in Table 3, the x/c values representing locations on the chord line in relation to the trailing edge and the positive y/c values representing heights from the chord line to points on the suction and pressure sides.

20. The plurality of airfoils of claim 13 , wherein a fourth of the plurality airfoils comprises a profile substantially in accordance with 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 heights from the chord line to points on the suction and pressure sides.