Damping system for wind turbine blade edge vibration stabilization
A wind turbine blade extending in a longitudinal direction between a root end and a tip end and comprising a shell having an outer surface defining a pressure side and a suction side, a leading edge and a trailing edge, a chord having a chord length extending between the leading edge and the trailing edge and a load-bearing structure extending in the longitudinal direction, the wind turbine blade further comprises a dampening system comprising a blade dampening body attached exteriorly to the load-bearing structure or exteriorly to the outer surface of the shell, at least a first dampener located within the blade dampening body and positioned with a component in the chordwise direction of the blade and adapted to absorb vibrational forces the wind turbine blade is subjected to.
1 . A wind turbine blade extending in a longitudinal direction between a root end and a tip end and comprising a shell having an outer surface defining a pressure side and a suction side, a leading edge and a trailing edge, a chord having a chord length extending between the leading edge and the trailing edge and a load-bearing structure extending in the longitudinal direction, the wind turbine blade further comprises a dampening system, the dampening system comprising:
a blade dampening body attached exteriorly to the load-bearing structure or exteriorly to the outer surface of the shell; and
at least a first dampener located within the blade dampening body and positioned with a component in the chordwise direction of the wind turbine blade and adapted to absorb vibrational forces the wind turbine blade is subjected to, and
wherein the first dampener protrudes into the shell, and
wherein a portion of the first dampener is exposed to an exterior environment.
2 . The wind turbine blade according to claim 1 , wherein the dampening system is configured to remain part of the wind turbine blade or be attached to the wind turbine blade under design operational conditions for the wind turbine blade.
3 . The wind turbine blade according to claim 1 , wherein the first dampener is integrally formed with the blade dampening body.
4 . The wind turbine blade according to claim 1 , wherein the wind turbine rotor blade is a segmented wind turbine rotor blade, and wherein the blade dampening body is attached between wind blade sections of the segmented wind turbine blade.
5 . The wind turbine blade according to claim 1 , wherein the first dampener is a liquid dampener or a mass dampener.
6 . The wind turbine blade according to claim 1 , wherein a plurality of dampening systems or dampeners are attached along the wind turbine blade.
7 . The wind turbine blade according to claim 1 , wherein the blade dampening body has the shape of a fairing, dimensioned to create a smooth transition between the blade dampening body and the shell for reducing drag on the wind turbine blade.
8 . The wind turbine blade according to claim 1 , wherein the dampening body is located within a spanwise outer 30% of an overall length of wind turbine blade and in an anti-node of an oscillation thereof to be dampened.
9 . A wind turbine comprising a plurality of wind turbine rotor blades, the wind turbine blade according to claim 1 being one of the plurality of wind turbine rotor blades.
10 . The wind turbine blade according to claim 1 , wherein the dampening body is located within a spanwise outer 10% of an overall length of wind turbine blade and in the anti-node of the oscillation thereof to be dampened.