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Apparatus and methods for impingement cooling of a side wall of a turbine nozzle segment

United States Patent

May 14, 2002
View the Complete Patent at the US Patent & Trademark Office
A gas turbine nozzle segment has outer and inner bands and a vane therebetween. Each band includes a nozzle wall, a side wall, a cover and an impingement plate between the cover and the 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 impingement plate has a turned flange welded to the inturned flange. A backing plate overlies the turned flange and aligned apertures are formed through the backing plate and turned flange to direct and focus cooling flow onto the side wall of the nozzle segment.
Burdgick; Steven Sebastian (Schenectady, NY)
General Electric Company (Schenectady, NY)
09/ 546,770
April 11, 2000
This invention was made with Government support under Contract No. DE-FC21-95MC311876 awarded by the Department of Energy. The Government has certain rights in this invention.