Gas turbine airfoil trailing edge corner

A gas turbine airfoil comprising:

• a pressure sidewall and a suction sidewall joined along respective leading and trailing edges and extending radially outward from a root to a tip;
• a trailing edge corner defining an intersection of the trailing edge and the tip;
• the trailing edge corner comprising:
• a metering hole receiving a cooling fluid flow from an interior fluid flow channel of the airfoil and discharging a metered flow;
• a dispersion cavity receiving the metered flow and discharging a dispersed flow, the dispersion cavity having a cross sectional area greater than a cross sectionnal area of the metering hole, said dispersion cavity being defined by a pair of spaced apart ribs extending in a flow direction of the dispersed flow, by the suction sidewall spanning between the ribs on one side of the cavity, and by the pressure sidewall on an opposed side of the cavity;
• an open flow channel receiving the dispersed flow and conducting the dispersed flow to a periphery of the airfoil, the open flow channel controlling mixing of the cooling fluid flow with a process gas flowing around an exterior of the airfoil.