Wind turbine rotor blade flow guiding device and wind turbine rotor blade

A wind turbine rotor blade comprising:

• a span direction;
• a root portion;
• a shoulder;
• and
• a wind turbine rotor blade flow guiding device including:
• a first portion including a rear surface for facing a surface of the wind turbine rotor blade;
• and
• a second portion connected to the first portion and extending from the first portion in a first direction along a length, the second portion including a top surface angled at an angle between 90° and 180° with respect to the rear surface of the first portion;
• wherein the second portion includes a plurality of corrugations extending along the length, wherein the second portion further includes a plurality of openings configured to allow a flow to pass through the second portion, wherein the second portion has a thickness that extends between the top surface and a back face disposed opposite the top surface, and wherein each of the plurality of openings create an enclosed hole through the thickness such that the flow enters each of the plurality of openings through the top surface emerges from the back face such that airflow that emerges from the back face, wherein the airflow that emerges from the back face through the plurality of openings is configured to energize a wake of the flow behind the back face of the wind turbine rotor blade flow guiding device, wherein the plurality of openings are disposed within the second portion in an arrangement that corresponds to the plurality of corrugations and wherein there is a single opening or row of openings for each corrugation,
• wherein the wind turbine rotor blade flow guiding device is connected to the wind turbine rotor blade such that the rear surface of the first portion faces the surface of the wind turbine rotor blade, and
• wherein the wind turbine rotor blade flow guiding device is connected to the wind turbine rotor blade between the root portion and the shoulder in the span direction.

A wind turbine comprising:

• a plurality of rotor blades, each of the plurality of rotor blades including:
• a span direction;
• a root portion;
• a shoulder;
• and
• a wind turbine rotor blade flow guiding device including:
• a first portion including a rear surface for facing a surface of one of the plurality of rotor blades;
• and
• a second portion connected to the first portion and extending from the first portion in a first direction along a length, the second portion including a top surface angled at an angle between 90° and 180° with respect to the rear surface of the first portion,
• wherein the second portion includes a plurality of corrugations extending along the length, wherein the second portion further includes a plurality of openings configured to allow a flow to pass through the second portion, wherein the second portion has a thickness that extends between the top surface and a back face disposed opposite the top surface, and wherein each of the plurality of openings create an enclosed hole through the thickness such that the flow enters each of the plurality of openings through the top surface emerges from the back face and such that airflow that emerges from the back face, wherein the airflow that emerges from the back face through the plurality of openings is configured to energize a wake of the flow behind the back face of the wind turbine rotor blade flow guiding device, wherein the plurality of openings are disposed within the second portion in an arrangement that corresponds to the plurality of corrugations and wherein there is a single opening or row of openings for each corrugation,
• wherein the wind turbine rotor blade flow guiding device is connected to the wind turbine rotor blade such that the rear surface of the first portion faces the surface of the wind turbine rotor blade, and
• wherein the wind turbine rotor blade flow guiding device is connected to the wind turbine rotor blade between the root portion and the shoulder in the span direction.