Wind turbine blade comprising a trailing edge section having a plurality of slits with varying lengths

A trailing edge panel configured to be attached at a trailing edge of a shell structure of a wind turbine blade, wherein the trailing edge panel comprises:

• an attachment section configured to be attached to and extend from the trailing edge of the shell structure of the wind turbine blade and to an upstream position on a first blade side of the shell structure of the wind turbine blade,
• a trailing edge section extending from the attachment section and configured to project out from the trailing edge of the shell structure of the wind turbine blade, wherein the trailing edge section is defined between
• a first trailing edge section end, wherein the first trailing edge section end is configured to extend along at least part of the span of the shell structure of the wind turbine blade and is the most distal end of the trailing edge section relative to the attachment section, and
• a second trailing edge section end, wherein the second trailing edge section end is configured to extend along at least part of the span of the shell structure of the wind turbine blade and is a plane going through the trailing edge panel defined at a predetermined distance from the first trailing edge section end toward the attachment section,
• and wherein the trailing edge section comprises a plurality of slits, including:
• a first plurality of slits extending a first distance from the first trailing edge section end toward the second trailing edge section end, and
• a second plurality of slits extending a second distance from the first trailing edge section end toward the second trailing edge section end, wherein the second distance is smaller than the first distance.