Hollow rotor core for generating a vortex in a wind turbine

A hollow rotor core assembly for a wind turbine, comprising:

• a hollow rotor core having a first end defining a first aperture and a second end defining a second aperture, the hollow rotor core comprising at least one set of cylindrical stacks, each cylindrical stack having a plurality of guiding vanes on an internal surface thereof;
• a plurality of air openings formed on the cylindrical stacks and adapted to accept an airflow into the hollow rotor core for creating a vortex inside the hollow rotor core upon rotation of the hollow rotor core assembly, wherein the plurality of guiding vanes maintain the vortex within the hollow rotor core;
• and
• an airflow blocking device mounted to the first end of the hollow rotor core, the blocking device having a surface over the first aperture of the first end partially blocking the first aperture of the first end to allow an exhaust of a fraction of a peripheral portion of the vortex through the first end of the hollow rotor core and to redirect a remaining central portion of the vortex towards the second end of the hollow rotor core for exhaustion of the remaining central portion of the vortex from the hollow rotor core through the second end.