Wind turbine blade damping device

A wind turbine blade having a root region with a root end and an airfoil region with a tip end between which ends a longitudinal axis of the wind turbine blade extends, a leading edge and a trailing edge between which a chord line extends transversely to the longitudinal axis, and a pressure side and a suction side on opposite sides of the chord line, the wind turbine blade comprising:

• a blade damping device for damping vibrations during standstill of the wind turbine blade, wherein the blade damping device comprises a base plate and a spoiler protruding from the base plate to a spoiler height along a height direction and having a spoiler length along a length direction, the height direction being adapted to extend outwardly from the wind turbine blade,
• wherein the blade damping device is detachably attached to the pressure side and/or the suction side of the airfoil region of the wind turbine blade so that the base plate of the blade damping device conforms to an exterior shape of the wind turbine blade, and wherein the spoiler height is at least 20% of a chord line length located at two thirds of a blade length along the longitudinal axis from the root end of the wind turbine blade, and
• wherein the spoiler is configured to increase air volume displaced by edgewise vibrations such that edgewise vibration damping and flow disturbance are provided by the blade damping device.