Rotor blade with serrations

A rotor blade for a wind turbine, comprising:

• an attachable panel, the attachable panel comprising non-bending serrations along at least a portion of a trailing edge section of the rotor blade,
• wherein an area between the non-bending serrations is at least partially filled with a plurality of fibers such that generation of noise in the trailing edge section of the rotor blade is reduced, and a plurality of aerodynamic fins projecting from the attachable panel, wherein the plurality of aerodynamic fins are located in an upstream region with respect to an airflow flowing from a leading edge section of the rotor blade to the trailing edge section, the upstream region being directly upstream with respect to a respective non-bending serration and a respective area between respective non-bending serrations, such that each aerodynamic fin of the plurality of aerodynamic fins is positioned between the leading edge section and at least one of the respective non-bending serration and the respective area between respective non-bending serrations located downstream from the leading edge, wherein a first subset of the plurality of the aerodynamic fins are entirely positioned and aligned upstream of the non-bending serrations with respect to an airflow from a leading edge section of the rotor blade to the trailing edge section and a second subset of the plurality of aerodynamic fins are entirely positioned and aligned upstream of the area between the non-bending serrations with respect to the airflow, wherein the first subset and second subset of the plurality of aerodynamic fins together manipulate the airflow over both the non-bending serrations and the plurality of fibers.