초록 ▼

Airfoils for the tip and mid-span regions of a wind turbine blade have upper surface and lower surface shapes and contours between a leading edge and a trailing edge that minimize roughness effects of the airfoil and provide maximum lift coefficients that are largely insensitive to roughness effects

Airfoils for the tip and mid-span regions of a wind turbine blade have upper surface and lower surface shapes and contours between a leading edge and a trailing edge that minimize roughness effects of the airfoil and provide maximum lift coefficients that are largely insensitive to roughness effects. The airfoil in one embodiment is shaped and contoured to have a thickness in a range of about fourteen to seventeen percent, a Reynolds number in a range of about 1,500,000 to 2,000,000, and a maximum lift coefficient in a range of about 1.4 to 1.5. In another embodiment, the airfoil is shaped and contoured to have a thickness in a range of about fourteen percent to sixteen percent, a Reynolds number in a range of about 1,500,000 to 3,000,000, and a maximum lift coefficient in a range of about 0.7 to 1.5. Another embodiment of the airfoil is shaped and contoured to have a Reynolds in a range of about 1,500,000 to 4,000,000, and a maximum lift coefficient in a range of about 1.0 to 1.5.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] An airfoil, comprising:a leading edge;a trailing edge spaced apart from said leading edge;an upper surface extending from said leading edge to said trailing edge;a lower surface ex

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] An airfoil, comprising:a leading edge;a trailing edge spaced apart from said leading edge;an upper surface extending from said leading edge to said trailing edge;a lower surface extending from said leading edge to said trailing edge; andsaid airfoil having a shape characterized by a thickness of about seventeen percent, a Reynolds number of about 2,000,000, and a maximum lift coefficient in a range of about 1.4 to 1.5.