Patent ID: 11879357
Assignee: ROLLS-ROYCE PLC
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
1. A turbine blade for a gas turbine engine, the turbine blade comprising:
an aerofoil comprising a leading edge, a trailing edge, a first sidewall defining a pressure surface, and a second sidewall defining a suction surface, wherein the first sidewall and the second sidewall are connected to each other at each of the trailing edge and the leading edge;
an internal cooling circuit disposed within the aerofoil and configured to direct a cooling fluid within the aerofoil;
a tip comprising a tip base disposed on the aerofoil, the tip base extending between the first sidewall and the second sidewall and between the leading edge and the trailing edge, the tip base defining a tip plane, wherein the aerofoil defines a chordal length between the leading edge and the trailing edge at the tip;
at least one first recessed portion formed on the first sidewall proximal to the tip and recessed inboard from the pressure surface, wherein the at least one first recessed portion is disposed proximal to and spaced apart from the trailing edge of the aerofoil, and wherein the at least one first recessed portion comprises:
a base surface disposed inboard from the pressure surface;
a first surface extending from the base surface to the pressure surface, the first surface further extending at least radially towards the tip, wherein the first surface is inclined obliquely to the tip plane by a first angle; and
a second surface extending from the base surface to the pressure surface, the second surface further extending from the first surface distal to the tip towards the trailing edge, wherein the second surface is inclined relative to the first surface; and
at least one slot extending from the first surface of the at least one first recessed portion to the internal cooling circuit such that the at least one slot fluidly communicates the at least one first recessed portion with the internal cooling circuit, wherein the at least one slot is configured to allow a flow of the cooling fluid from the internal cooling circuit to the at least one first recessed portion.