The present disclosure relates to dampening of predominantly edgewise vibrations in a wind turbine blade. This is achieved by a wind turbine blade comprising one or more bump airfoil sections, each bump airfoil section being characterised in that for any airfoil within the bump airfoil section, the airfoil's pressure side profile y.sub.p has particular geometric properties near the trailing edge of the airfoil. Furthermore, a total length of all bump airfoil sections in the blade is at most 30% of the length of the blade, and at least half of the total length of all bump airfoil sections in the wind turbine blade is provided by one or more bump airfoil sections located spanwise in the outermost 30% of the blade.

A modular wind power blade structure and a manufacturing method thereof are disclosed. The structure includes a windward shell, a leeward shell, a T-shaped rib and a support member. The windward shell and leeward shell are assembled relative to each other to form a complete cross-sectional structure of the blade, the T-shaped rib is fixed on the windward shell and leeward shell along length direction of the blade and a plurality of the T-shaped ribs is provided at an interval in width direction of the blade, and the support member comprises a web and spar caps connected at both ends of the web, the two spar caps respectively fixedly connected to the inner wall of the windward shell and the leeward shell, and the T-shaped rib and the spar cap are pultruded profiles, and the windward shell and the leeward shell are formed through an automatic tape laying process.

Disclosed is a wind turbine blade and a method for its production. The wind turbine blade comprises an upwind side shell part and a downwind side shell part. The upwind side shell part and the downwind side part are bonded together along at least one joint. At said at least one joint, the upwind side shall part and the downwind side shell part are bonded at an internal glue flange as well as at an external glue flange. The glue flange can be produced by using a mould insert along which the glue flange is laminated.

The present disclosure provides a wind turbine blade with an improved trailing edge structure and a manufacturing method thereof. The wind turbine blade includes an upper shell, a lower shell, and a trailing edge, where a trailing edge bonding region enclosed by the upper shell, the lower shell and the trailing edge is filled with composite materials, and the composite materials are discontinuous in an airfoil chordwise direction. The manufacturing method includes the following steps: S1: manufacturing reinforcements with a same cross-sectional shape as the trailing edge filling region for composite materials; and S2: integrally molding the reinforcements, a fiber fabric and the upper shell, providing the lower shell, combining the upper shell and the lower shell, and performing heating for curing and molding. The discontinuous filling structure reduces usages of the adhesive and the reinforcements of the composite materials. The small web can improve a strength of the trailing edge region, and reduce a bonding width of the trailing edge. Therefore, the present disclosure realizes a light weight of the wind turbine blade.

A multi-layer composite body that includes a first composite layer having a first elasticity parameter and a second composite layer mechanically coupled with the first composite layer. The second composite layer may have a second elasticity parameter that is different from the first elasticity parameter of the first composite layer. The first composite layer and the second composite layer may extend in a continuous manner with respect to each other, forming a substantially two-dimensional, homogenous structure. Further, the first composite layer and the second composite layer may respond to a common external mechanical force in a different manner.

A multi-layer composite body that includes a first composite layer having a first elasticity parameter and a second composite layer mechanically coupled with the first composite layer. The second composite layer may have a second elasticity parameter that is different from the first elasticity parameter of the first composite layer. The first composite layer may include at least two transverse parts joined by a flexible folding zone such that the at least two transverse parts and the folding zone form a reversibly foldable and substantially two-dimensional homogenous structure. Further, the first composite layer and the second composite layer may respond to a common external mechanical force in a different manner.

A wind turbine rotor blade is disclosed that includes a blade body having a shape that generates a lift when impacted by an incident airflow. The blade body includes a pressure side and a suction side joining at a leading edge and a trailing edge, and a chord extension system mechanically coupled with the trailing edge. The chord extension system may be configured to enhance an aerodynamic performance of the wind turbine rotor blade. The chord extension system may include either a flat plate or a serration. The chord extension system may include a multi-layer composite body that includes a first composite layer having a first elasticity parameter and a second composite layer mechanically coupled with the first composite layer. The second composite layer may have a second elasticity parameter different from the first elasticity parameter.

A wind turbine rotor blade that includes a blade body having a shape that generates a lift when impacted by an incident airflow. The blade body includes a pressure side and a suction side shell joining at a leading and a trailing edge, and a load-shedding assembly mechanically coupled with the trailing edge and configured to move from an original position to a reversibly deformed position under an application of an external load, and back to the original position on withdrawal of the external load. The load-shedding assembly includes the pressure and suction side shells, and a number of flexible structural elements mechanically coupled with the shells and configured to cause the load-shedding assembly to move from the original position to the deformed position under the external load and back to the original position on withdrawal of the external load, and thereby, reduce an overall load on the blade body.

The performance of airfoils on wind turbines has been found to be improved by the presence of endplates mounted to the airfoil. Using steady numerical simulations, the shape of the endplates that improves the lift coefficients and lift-to-drag coefficients to the greatest degree is a thin plate that follows the chord of the airfoil with a thickness that is between an eighth and a quarter of the length of the airfoil. Rounding the edges of the endplates further enhance the performance of the airfoil, and the overall effect of the endplates achieves nearly a 9.1% increase and 30% decrease in the lift and drag forces, respectively.

A method of manufacturing a wind turbine rotor blade. The method includes providing a blade body having a shape that generates a lift when impacted by an incident airflow, and longitudinally extending the blade body from a root region to a tip region, through a transition region extending between and joining the root and the tip region. The root region may begin from a proximal end of the blade body, extending up to a predetermined first length of the blade body. The tip region may begin from a distal end of the blade body, extending up to a predetermined second length of the blade body. The blade body may include a predetermined structure that is fail-safe under a predetermined operating condition. The method may include providing flow enhancing components configured to enhance aerodynamic flow characteristics of the blade body, and physically coupling the flow enhancing components with the blade body.