Wind turbine blade comprising a noise reducing device

A noise reducing device (19) for a wind turbine blade (5), having a first end (22), a second end (25), a first local side surface (27) and a second local side surface (29) arranged between the first end (22) and the second end, wherein the noise reducing device (19) is configured for attachment to a side surface of the wind turbine blade (5), the noise reducing device (19) comprising a plurality of airflow modifying elements (20), a plurality of noise reducing elements (23) and at least one base part (26), the airflow modifying elements (20) extending from a first proximal end (21) to the first end (22), the noise reducing elements (23) extending from an opposite facing second proximal end (24) to the second end (25), and the at least one base part (26) extending from the first proximal end (21) to the second proximal end (24), wherein the airflow modifying elements (20) and the noise reducing elements (23) extend in opposite longitudinal directions from the first end (22) to the second end (25), the second local side surface (29) of each of the airflow modifying elements (20) and the at least one base part (26) forming a continuous flat side surface and being configured to contact and/or to be directly attached to said side surface of the wind turbine blade (5), wherein the wind turbine blade (5) has a trailing edge (10), the trailing edge (10) being a truncated trailing edge (10″) having a trailing edge surface (32), and wherein the at least one noise reducing device (19) has a local edge surface (28) configured to extend along at least part of said trailing edge surface (32) in a flapwise direction when the noise reducing device (19) is attached to a side surface of the wind turbine blade (5).

A wind turbine blade (5) for a wind turbine, extending in a longitudinal direction from a blade root (7) to a tip end (8) and further in a chordwise direction from a leading edge (9) to a trailing edge (10), the wind turbine blade comprising a first side surface defining a pressure side (12) and a second side surface defining a suction side (13), wherein at least one noise reducing device (19) is attached to one of said first and second side surfaces, wherein the at least one noise reducing device (19) is arranged relative to the trailing edge (10), the noise reducing device (19) having a first end (22), a second end (25), a first local side surface (27) and a second local side surface (29) arranged between the first end (22) and the second end, the noise reducing device (19) comprising a plurality of airflow modifying elements (20), a plurality of noise reducing elements (23) and at least one base part (26), the airflow modifying elements (20) extending from a first proximal end (21) to the first end (22), the noise reducing elements (23) extending from an opposite facing second proximal end (24) to the second end (25), the at least one base part (26) extends from the first proximal end (21) to the second proximal end (24), wherein the airflow modifying elements (20) and the noise reducing elements (23) extend in opposite longitudinal directions from the first end (22) to the second end (25), the second local side surface (29) of each of the airflow modifying elements (20) and the at least one base part (26) forming a continuous flat side surface, wherein the trailing edge (10) is a truncated trailing edge (10″) having a trailing edge surface (32), wherein the at least one noise reducing device (19) has a local edge surface (28) extend along at least part of said trailing edge surface (32) in a flapwise direction.