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Apparatus and methods for impingement cooling of an undercut region adjacent a side wall of a turbine nozzle segment

United States Patent

December 18, 2001
View the Complete Patent at the US Patent & Trademark Office
A gas turbine nozzle segment has outer and inner bands. Each band includes a side wall, a cover and an impingement plate between the cover and nozzle wall defining two cavities on opposite sides of the impingement plate. Cooling steam is supplied to one cavity for flow through apertures of the impingement plate to cool the nozzle wall. The side wall of the band and inturned flange define with the nozzle wall an undercut region. The inturned flange has a plurality of apertures for directing cooling steam to cool the side wall between adjacent nozzle segments.
Burdgick; Steven Sebastian (Schenectady, NY), Itzel; Gary Michael (Simpsonville, SC)
General Electric Company (Schenectady, NY)
09/ 543,457
April 5, 2000
This Invention was made with Government support under Contract No. DE-FC21-95MC31176 awarded by the Department of Energy. The Government has certain rights in this invention.