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

Patent · Tue Jan 01 00:00:00 EST 2002

OSTI ID:874577

Burdgick, Steven Sebastian ^[1]

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1. Schenectady, NY

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.

• Research Organization: General Electric Co., Schenectady, NY (United States)
• DOE Contract Number: FC21-95MC31176
• Assignee: General Electric Company (Schenectady, NY)
• Patent Number(s): US 6419445
• OSTI ID: 874577
• Country of Publication: United States
• Language: English

Related Subjects

apparatus
impingement
cooling
wall
adjacent
undercut
region
turbine
nozzle
segment
gas
outer
inner
bands
vanes
therebetween
band
cover
plate
defining
cavities
opposite
steam
supplied
cavity
flow
apertures
cool
inturned
flange
define
slots
formed
through-apertures
extending
edges
disposed
slot
plates
angled
medium
exiting
lie
close
focusing
targeting
gas turbine
cooling medium
wall adjacent
nozzle segment
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