Trailing edge tip cooling of blade of a gas turbine blade

A turbine blade assembly comprising:

• a rotor disk configured to be rotatable;
• and
• a plurality of turbine blades installed on the rotor disk,
• wherein each of the turbine blade comprises:
• an airfoil having an airfoil tip, a leading edge, a trailing edge, and a pressure side and a suction side extending from the leading edge to the trailing edge and defining an airfoil cavity therein;
• a squealer tip arranged at the airfoil tip and comprising a trailing edge tip portion disposed at the trailing edge of the airfoil and a pressure side rail and a suction side rail meeting at the trailing edge tip portion and defining a squealer tip pocket at the airfoil tip;
• and
• at least one tip cooling hole disposed at the squealer tip pocket to provide cooling air from the airfoil cavity to the squealer tip pocket,
• wherein the trailing edge tip portion of the squealer tip comprises:
• a chamfer disposed towards the pressure side of the airfoil;
• and
• a groove extending from the squealer tip pocket to the chamfer to provide cooling air from the squealer tip pocket to the chamfer.

A gas turbine comprising:

• a compressor configured to compress air introduced thereinto from an outside;
• a combustor configured to mix fuel with air compressed by the compressor for combustion;
• and
• a turbine including a plurality of turbine blades rotated by combustion gas produced by the combustor,
• wherein each of the turbine blade comprises:
• an airfoil having an airfoil tip, a leading edge, a trailing edge, and a pressure side and a suction side extending from the leading edge to the trailing edge and defining an airfoil cavity therein;
• a squealer tip arranged at the airfoil tip and comprising a trailing edge tip portion disposed at the trailing edge of the airfoil and a pressure side rail and a suction side rail meeting at the trailing edge tip portion and defining a squealer tip pocket at the airfoil tip;
• and
• at least one tip cooling hole disposed at the squealer tip pocket to provide cooling air from the airfoil cavity to the squealer tip pocket,
• wherein the trailing edge tip portion of the squealer tip comprises:
• a chamfer disposed towards the pressure side of the airfoil;
• and
• a groove extending from the squealer tip pocket to the chamfer to provide cooling air from the squealer tip pocket to the chamfer.