Turbine shroud cooling hole diffusers and related method
AssigneeGeneral Electric Company
InventorTagir Nigmatulin
Life of this patent
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Abstract
An inner shroud assembly for a turbine comprising a plurality of part-annular segments combining to form an inner, annular shroud adapted to surround rotating components of a turbine, each segment having a pair of end faces that are juxtaposed similar end faces on adjacent segments with gaps therebetween; at least one convection cooling hole in the segment, opening along at least one of the pair of end faces. The cooling hole opens specifically into a diffuser recess formed in one of the pair of end faces for diffusing the flow of cooling air into the gap.
Claims9
An inner shroud assembly for a turbine comprising:
- a plurality of part-annular segments combining to form an inner, annular shroud adapted to surround rotating components of a turbine, each segment having a pair of end faces that are juxtaposed similar end faces on adjacent segments with gaps therebetween;
- at least one convection cooling hole in the segment, opening along at least one of said pair of end faces;
- said at least one cooling hole opening into a diffuser recess formed in said one of said pair of end faces for diffusing the flow of cooling air into said gap;
- wherein said diffuser recess is substantially elongated in shape, with lengthwise surfaces on opposite sides of said at least one cooling hole tapering inwardly toward said cooling hole.
A segment for a turbine shroud assembly comprising:
- a segment body having a sealing face and opposite end faces;
- and at least one convection cooling hole extending through said segment body and opening into a diffuser recesses formed in a respective end face of said segment body;
- wherein said diffuser recess is substantially rectangular in shape, with lengthwise surfaces on opposite sides of the convection cooling hole tapering toward said convection cooling hole.
A method of purging cooling air into gaps between adjacent part annular segments in a turbine shroud assembly comprising:
- a) supplying cooling air through one or more cooling holes formed in each segment, each cooling hole opening along an end face of the segment;
- and
- b) diffusing the cooling air before it reaches the end face of each said segment.
Dependencies are inferred from the claim text.