Rotor blade with a serrated trailing edge

A rotor blade for a wind turbine,

• wherein
• the rotor blade comprises serrations along at least a portion of a trailing edge section of the rotor blade,
• the serrations comprise a first tooth and at least a second tooth, wherein the first tooth is spaced apart from the second tooth,
• an area between the first tooth and the second tooth is at least partially filled with a plurality of comb elements, wherein the plurality of comb elements are arranged substantially parallel to each other and in substantially chordwise direction of the rotor blade, such that generation of noise in the trailing edge section of the rotor blade is reduced, and
• wherein
• the rotor blade further comprises a plurality of ridges comprising a first ridge and at least a second ridge for manipulating an airflow flowing toward the serrations and the plurality of comb elements, the first ridge is positioned in the area between the first tooth and the second tooth and connects to a first comb element of the plurality of comb elements, and the second ridge is positioned on the first tooth and does not connect to any of the plurality of comb elements.