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

United States Patent

July 16, 2002
View the Complete Patent at the US Patent & Trademark Office
A gas turbine nozzle segment has outer and inner bands and vanes therebetween. 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. Slots are formed through the inturned flange along the nozzle side wall. A plate having through-apertures extending between opposite edges thereof is disposed in each slot, the slots and plates being angled such that the cooling medium exiting the apertures in the second cavity lie close to the side wall for focusing and targeting cooling medium onto the side wall.
Burdgick; Steven Sebastian (Schenectady, NY)
General Electric Company (Schenectady, NY)
09/ 546,766
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.