Cooling System For Actively Cooling A Turbine Blade

A cooling system for actively cooling a turbine blade with a cooling fluid comprising:

• the turbine blade having an inlet edge and an outlet edge;
• an internal flow passage formed in the turbine blade, which extends from the inlet edge to the outlet edge and comprises:
• a first passage section, which defines a first flow direction;
• a second passage section, which defines a second flow direction;
• a wall located between the first passage section and the second passage section;
• a diverter, between the first passage section and the second passage section, which configured to transfer a fluid flow from the first flow direction into the second flow direction;
• and
• a pier head formed by the wall in a region of the diverter, which at least with a pier head section extends into a region of the first passage section that reduces a flow cross section of the internal flow passage.