Film cooling air pocket in a closed loop cooled airfoil

Patent · Tue Jan 01 00:00:00 EST 2002

OSTI ID:874656

Yu, Yufeng Phillip ^[1]; Itzel, Gary Michael ^[1]; Osgood, Sarah Jane ^[2]; Bagepalli, Radhakrishna ^[3]; Webbon, Waylon Willard ^[4]; Burdgick, Steven Sebastian ^[3]

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1. Simpsonville, SC
2. East Thetford, VT
3. Schenectady, NY
4. Greenville, SC

Turbine stator vane segments have radially inner and outer walls with vanes extending between them. 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. To provide for air film cooing of select portions of the airfoil outer surface, at least one air pocket is defined on a wall of at least one of the cavities. Each air pocket is substantially closed with respect to the cooling medium in the cavity and cooling air pumped to the air pocket flows through outlet apertures in the wall of the airfoil to cool the same.

• Research Organization: General Electric Co., Schenectady, NY (United States)
• DOE Contract Number: FC21-95MC31176
• Assignee: General Electric Company (Schenectady, NY)
• Patent Number(s): US 6435814
• OSTI ID: 874656
• Country of Publication: United States
• Language: English

Related Subjects

film
cooling
air
pocket
closed
loop
cooled
airfoil
turbine
stator
vane
segments
radially
inner
outer
walls
vanes
extending
compartmentalized
impingement
plates
steam
flowing
wall
plenum
passes
plate
upper
surface
spent
flows
cavities
inserts
return
surfaces
provide
cooing
select
portions
defined
substantially
medium
cavity
pumped
outlet
apertures
cool
upper surface
steam flow
radially inner
cooled air
vanes extend
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