Film cooling for a closed loop cooled airfoil

Patent · Wed Jan 01 00:00:00 EST 2003

OSTI ID:874986

Burdgick, Steven Sebastian ^[1]; Yu, Yufeng Phillip ^[2]; Itzel, Gary Michael ^[2]

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1. Schenectady, NY
2. Simpsonville, SC

Turbine stator vane segments have radially inner and outer walls with vanes extending therebetween. The inner and outer walls are compartmentalized and have impingement plates. Steam flowing into the outer wall plenum passes through the impingement plate for impingement cooling of the outer wall upper surface. The spent impingement steam flows into cavities of the vane having inserts for impingement cooling the walls of the vane. The steam passes into the inner wall and through the impingement plate for impingement cooling of the inner wall surface and for return through return cavities having inserts for impingement cooling of the vane surfaces. At least one film cooling hole is defined through a wall of at least one of the cavities for flow communication between an interior of the cavity and an exterior of the vane. The film cooling hole(s) are defined adjacent a potential low LCF life region, so that cooling medium that bleeds out through the film cooling hole(s) reduces a thermal gradient in a vicinity thereof, thereby the increase the LCF life of that region.

• Research Organization: General Electric Co., Schenectady, NY (United States)
• DOE Contract Number: FC21-95MC31176
• Assignee: General Electric Company (Schenectady, NY)
• Patent Number(s): US 6506013
• OSTI ID: 874986
• Country of Publication: United States
• Language: English

Related Subjects

film
cooling
closed
loop
cooled
airfoil
turbine
stator
vane
segments
radially
inner
outer
walls
vanes
extending
therebetween
compartmentalized
impingement
plates
steam
flowing
wall
plenum
passes
plate
upper
surface
spent
flows
cavities
inserts
return
surfaces
hole
defined
flow
communication
interior
cavity
exterior
holes
adjacent
potential
lcf
life
region
medium
bleeds
reduces
thermal
gradient
vicinity
increase
upper surface
steam flow
radially inner
cooled air
vanes extend
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