Cooling circuit for steam and air-cooled turbine nozzle stage

Patent · Tue Jan 01 00:00:00 EST 2002

OSTI ID:874517

Itzel, Gary Michael ^[1]; Yu, Yufeng ^[2]

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1. Clifton Park, NY
2. Guilderland, NY

The turbine vane segment includes inner and outer walls with a vane extending therebetween. The vane includes leading and trailing edge cavities and intermediate cavities. An impingement plate is spaced from the outer wall to impingement-cool the outer wall. Post-impingement cooling air flows through holes in the outer wall to form a thin air-cooling film along the outer wall. Cooling air is supplied an insert sleeve with openings in the leading edge cavity for impingement-cooling the leading edge. Holes through the leading edge afford thin-film cooling about the leading edge. Cooling air is provided the trailing edge cavity and passes through holes in the side walls of the vane for thin-film cooling of the trailing edge. Steam flows through a pair of intermediate cavities for impingement-cooling of the side walls. Post-impingement steam flows to the inner wall for impingement-cooling of the inner wall and returns the post-impingement cooling steam through inserts in other intermediate cavities for impingement-cooling the side walls of the vane.

• Research Organization: General Electric Co., Schenectady, NY (United States)
• DOE Contract Number: FC21-95MC31176
• Assignee: General Electric Company (Schenectady, NY)
• Patent Number(s): US 6406254
• OSTI ID: 874517
• Country of Publication: United States
• Language: English

Related Subjects

cooling
circuit
steam
air-cooled
turbine
nozzle
stage
vane
segment
inner
outer
walls
extending
therebetween
leading
trailing
edge
cavities
intermediate
impingement
plate
spaced
wall
impingement-cool
post-impingement
air
flows
holes
form
air-cooling
film
supplied
insert
sleeve
openings
cavity
impingement-cooling
afford
thin-film
provided
passes
pair
returns
inserts
air flow
steam flow
turbine vane
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