Turbine blade squealer tip peripheral end wall with cooling passage arrangement
AssigneeGeneral Electric Company
InventorChing-Pang Lee
Life of this patent
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Abstract
A turbine blade squealer tip has a cooling passage arrangement which includes a peripheral end wall surrounding a central portion of an end cap of the squealer tip, an outer peripheral groove defined in an outer surface of the peripheral end wall being spaced outwardly from the central portion of the end cap, and a multiplicity of holes extending through the end wall from the outer groove to an internal source of cooling air flow within the turbine blade, bypassing the central portion of the end cap of the squealer tip. The outer groove which receives the flow of cooling air from outlets of the holes tends to trap the air therein so as to form an annular air seal about the outer surface of the squealer tip end wall which impedes leakage of hot gas flow past the squealer tip.
Claims10
In a turbine blade having an interior source of cooling air flow and an outer end cap with a continuous peripheral portion, a cooling passage arrangement comprising:
- (a) a peripheral end wall connected to, extending around, and projecting outwardly from said peripheral portion of said end cap of said blade so as to surround a central portion of said end cap, said peripheral end wall having an outer surface spaced outwardly from said central portion of said end cap;
- (b) an outer groove defined in said outer surface of said peripheral end wall, said outer groove extending about at least a portion of the extent of said outer surface of said peripheral end wall;
- and
- (c) a multiplicity of holes extending through said peripheral end wall from said internal source of cooling air flow to said outer groove, said holes being arranged in a criss-cross fashion with respect to one another so as to intersect with one another within said peripheral end wall and to bypass said central portion of said end cap of said blade.
Dependencies are inferred from the claim text.