초록 ▼

The present invention relates in a broad aspect to a method for design and modification of airfoils useful for wind turbine applications, which airfoils possess smooth and stable characteristics in stall. These characteristics comprise: (1) No or very little tendency to double stall, (2) Insensitivi

The present invention relates in a broad aspect to a method for design and modification of airfoils useful for wind turbine applications, which airfoils possess smooth and stable characteristics in stall. These characteristics comprise: (1) No or very little tendency to double stall, (2) Insensitivity or little sensitivity of maximum lift to leading edge roughness, (3) High lift-drag ratio just before maximum lift, (4) Small variations of the aerodynamic loads in stall and (5) Sufficient aerodynamic damping to suppress blade vibrations in stall. The invention further relates to blades and/or airfoil sections in general which posses smooth and stabile characteristics in stall. Also, it relates to a method of implementing the desired shape on an airfoil or a wind turbine blade.

대표청구항 ▼

The present invention relates in a broad aspect to a method for design and modification of airfoils useful for wind turbine applications, which airfoils possess smooth and stable characteristics in stall. These characteristics comprise: (1) No or very little tendency to double stall, (2) Insensitivi

The present invention relates in a broad aspect to a method for design and modification of airfoils useful for wind turbine applications, which airfoils possess smooth and stable characteristics in stall. These characteristics comprise: (1) No or very little tendency to double stall, (2) Insensitivity or little sensitivity of maximum lift to leading edge roughness, (3) High lift-drag ratio just before maximum lift, (4) Small variations of the aerodynamic loads in stall and (5) Sufficient aerodynamic damping to suppress blade vibrations in stall. The invention further relates to blades and/or airfoil sections in general which posses smooth and stabile characteristics in stall. Also, it relates to a method of implementing the desired shape on an airfoil or a wind turbine blade. eves to the wear-resistant liner at locations to come into register with said bores in the rotor blade when the wear-resistant liner is attached to the rotor blade and to have a portion projecting beyond said rotor blade; pre-forming the liner to fit on the fluid dynamic surface of the rotor blade; bringing the wear-resistant liner and the rotor blade into engagement and placing a thrust collar around the projecting portion of the connector sleeve at the non-fluid dynamic rear face of the rotor blade; presenting a tubular clamping tool to said thrust collar and mounting it with respect to said connector sleeve so that the tool can be actuated to thrust the thrust collar firmly against the rear surface of the blade body; applying tack welds between the connector sleeve and the thrust collar to hold the thrust collar in place relative to the connector sleeve; and, removing the clamping tool from the connector sleeve. 6. A method according to claim 5 characterised by including the further step of providing additional weld material between the thrust collar and the connector sleeve to mount the thrust collar more securely relative to the connector sleeve.