A method is provided for installing a continuous pliant add-on device (e.g., a vibration suppression device) onto a blade of a wind turbine, wherein the blade is mounted to a rotor that is atop a tower. The method includes, with the rotor, positioning the blade to a first position. A first end of the add-on device is fixed to a first end of the blade. The blade is then rotated with a pitch control system while supplying the add-on device in a first direction along a span of the rotating blade to wrap the add-on device around the blade towards an opposite second end of the blade in a first wrap pattern.

A vortex generator device for a wind turbine blade, and a wind turbine blade is disclosed, the vortex generator device comprising a base with an inner side and an outer side, and a first fin protruding from the outer side and extending along a first fin axis, wherein the vortex generator device is a single-fin vortex generator device, and the base has a first edge part and a second edge part, the first edge part and the second edge part forming a primary angle in the range from 5 degrees to 60 degrees.

The present disclosure relates to a method of optimizing a rotor blade of a wind turbine, wherein said rotor blade extends from a rotor-blade coupling to a rotor-blade tip in a rotor-blade longitudinal direction with a rotor-blade length, having an aerodynamical profile extending between a leading edge and a trailing edge, wherein said method comprises the following steps: designing of said rotor blade for design environmental conditions including at least one design air density, with said designing comprising providing a sound-protection means, the sound protection means comprising at least one bristle, within a blade external region of said rotor blade the latter being defined as the 50% of said rotor-blade length abutting said rotor-blade tip; providing an air density at the installation site of said wind turbine; comparing said air density with said design air density; and increasing the induction factor by increasing a density factor of said sound-protection means when said air density is lower than said design air density.

A wind turbine blade apparatus at least includes a wind turbine blade body, wherein a serration portion is disposed on at least on a part of a trailing edge of the wind turbine blade body, the serration portion having a saw-teeth shape where a mountain portion and a valley portion are arranged alternately in a blade longitudinal direction, and wherein a chord-directional cross section of the wind turbine blade body along a chord direction is formed to have an airfoil shape at any position in a region from the mountain portion to the valley portion.

A vortex generator device for a wind turbine blade, and a wind turbine blade is disclosed, the vortex generator device comprising a base with an inner side and an outer side, and a first fin protruding from the outer side and extending along a first fin axis, wherein the vortex generator device is a single-fin vortex generator device, and the base has a first edge part and a second edge part, the first edge part and the second edge part forming a primary angle in the range from 5 degrees to 60 degrees.

A vortex generator device for a wind turbine blade, and a wind turbine blade is disclosed, the vortex generator device comprising a base with an inner side and an outer side, and a first fin protruding from the outer side and extending along a first fin axis, wherein the vortex generator device is a single-fin vortex generator device, and the base has a first edge part and a second edge part, the first edge part and the second edge part forming a primary angle in the range from 5 degrees to 60 degrees.

A vortex generator for wind turbine blade includes: a platform; and at least one fin disposed projecting from an upper surface of the platform, and including a leading edge and a trailing edge. A rear end surface of the at least one fin, including the trailing edge, has a shape inclined backward as a distance from a bottom surface of the platform increases in a height direction of the fin.

A wind turbine blade apparatus at least includes a wind turbine blade body, wherein a serration portion is disposed on at least on a part of a trailing edge of the wind turbine blade body, the serration portion having a saw-teeth shape where a mountain portion and a valley portion are arranged alternately in a blade longitudinal direction, and wherein a chord-directional cross section of the wind turbine blade body along a chord direction is formed to have an airfoil shape at any position in a region from the mountain portion to the valley portion.

A vortex generator for wind turbine blade is a vortex generator for wind turbine blade, the vortex generator being made of a resin, including: a platform; and at least one fin disposed projecting from an upper surface of the platform. The vortex generator includes a cavity that opens to a bottom surface of the platform and extends to an inside of the fin.

The present disclosure relates to methods (400, 500) for reducing vibrations in parked wind turbines (10), assemblies (82) comprising vibration mitigating devices (300) for wind turbine blades (22) and wind turbines (10). An assembly (82) comprises a vibration mitigating device (300) configured to be arranged around a wind turbine blade (22) of a wind turbine (10) and comprising one or more inflatable bodies (305) and one or more air flow modifying elements (310); and a pressure source (98) configured to inflate and/or deflate one or more of the one or more inflatable bodies (305) based on measurements of a sensor system (97) configured to monitor the wind turbine (10) and/or environmental conditions around the wind turbine (10).