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Film cooling air pocket in a closed loop cooled airfoil

Patent ·
OSTI ID:874656
 [1];  [1];  [2];  [3];  [4];  [3]
  1. Simpsonville, SC
  2. East Thetford, VT
  3. Schenectady, NY
  4. Greenville, SC
+ Show Author Affiliations

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 Company (Schenectady, NY)
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

References (2)

Advances in Steam Path Technology journal April 1996
Development Requirements for an Advanced Gas Turbine System journal October 1995

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Related Subjects

/415/416/
air
airfoil
apertures
cavities
cavity
closed
compartmentalized
cooing
cool
cooled
cooled air
cooling
defined
extending
film
flowing
flows
impingement
inner
inserts
loop
medium
outer
outlet
passes
plate
plates
plenum
pocket
portions
provide
pumped
radially
radially inner
return
segments
select
spent
stator
steam
steam flow
substantially
surface
surfaces
turbine
upper
upper surface
vane
vanes
vanes extend
wall
walls