The invention relates to a wind turbine blade oscillation preventer comprising an aperture and a sleeve and having a peripheral extent and a longitudinal extent, the preventer being configured for removable application over a wind turbine blade and configured to extend longitudinally thereover and peripherally thereabout; the preventer having a non-aerodynamic exterior surface which exhibits a rough surface capable of disrupting smooth or laminar airflow over a substantial portion of the longitudinal and peripheral extent of the sleeve when the preventer is in place on a wind turbine blade. The preventer further comprises a smooth interior surface extending along a substantial portion of the longitudinal extent of the sleeve. The invention also relates to a method of application of a blade oscillation preventer over wind turbine blades which comprise serrations at a trailing edge thereof.

A method for creating a transition from an edge of an add-on part mounted on the outer surface of a rotor blade, including the steps: delimiting an application area on the rotor blade surface and the add-on part to be covered by a sealant compound with a thin and smooth masking tape; dispensing of the sealant on the application area; distribution of the sealant; removing the masking tape; and smoothening of a sealant transition step with a flexible tool, is provided.

A wind turbine rotor blade is also provided.

Provided is a method of shaping an initial edge seal along a longitudinal edge step of an add-on part mounted on the outer surface of a rotor blade, which method includes the steps of providing an initial edge seal along a longitudinal edge step of an add-on part mounted on an outer surface of a rotor blade, and removing a top layer of the initial edge seal. Further provided is wind turbine rotor blade.

Provided is a method of shaping an initial edge seal along a longitudinal edge step of an add-on part mounted on the outer surface of a rotor blade, which method includes the steps of providing an initial edge seal along a longitudinal edge step of an add-on part mounted on an outer surface of a rotor blade, and removing a top layer of the initial edge seal. Further provided is wind turbine rotor blade.

The invention relates to a wind turbine blade oscillation preventer comprising an aperture and a sleeve and having a peripheral extent and a longitudinal extent, the preventer being configured for removable application over a wind turbine blade and configured to extend longitudinally thereover and peripherally thereabout; the preventer having a non-aerodynamic exterior surface which exhibits a rough surface capable of disrupting smooth or laminar airflow over a substantial portion of the longitudinal and peripheral extent of the sleeve when the preventer is in place on a wind turbine blade. The preventer further comprises a smooth interior surface extending along a substantial portion of the longitudinal extent of the sleeve. The invention also relates to a method of application of a blade oscillation preventer over wind turbine blades which comprise serrations at a trailing edge thereof.

A method for reducing surface roughness of a component according to an example of the present disclosure includes forming a layer of reactive material on a surface of a component, the surface of the component having at least one partially attached particle, whereby the reactive material substantially covers the at least one partially attached particle, and dissolving the reactive material, wherein dissolving the reactive material covering the partially attached particles causes the partially attached particles to break free from the surface of the component, leaving a new smooth surface.

Another method for reducing surface roughness of an engine component according to an example of the present disclosure includes forming a component by additive manufacturing, the component including an internal feature having at least one rough area, the rough area including at least one partially attached particle, forming an aluminum layer on the surface of the component, the aluminum layer substantially covering the at least one partially attached particle, heat treating the component to cause diffusion of aluminum in a diffusion zone, and dissolving away the aluminum layer and diffusion zone, wherein dissolving the aluminum covering the at least one partially attached particle and the diffusion zone causes the at least one partially attached particle to be freed from the surface of the component.

A method for creating a transition from an edge of an add-on part mounted on the outer surface of a rotor blade, including the steps: delimiting an application area on the rotor blade surface and the add-on part to be covered by a sealant compound with a thin and smooth masking tape; dispensing of the sealant on the application area; distribution of the sealant; removing the masking tape; and smoothening of a sealant transition step with a flexible tool, is provided. A wind turbine rotor blade is also provided.

A blade (10) for a rotor of a wind turbine having a profiled contour divided into: a root region (30), an airfoil region (34), and a transition region (32) between the root region (30) and the airfoil region (34). A shoulder (40) is located at the boundary between the transition region (32) and the airfoil region (34). The blade's profiled contour comprises a local relative thickness defined as the local ratio between a maximum profile thickness (t) and the chord length (c). The ratio between the shoulder width (W) and the blade length (L) being less than or equal to 0.075, and the relative thickness (t/c) in a blade length interval of 0-0.8 L is at least 22%.