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Title: Film cooling air pocket in a closed loop cooled airfoil

Abstract

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.

Inventors:
 [1];  [1];  [2];  [3];  [4];  [3]
  1. (Simpsonville, SC)
  2. (East Thetford, VT)
  3. (Schenectady, NY)
  4. (Greenville, SC)
Publication Date:
Research Org.:
General Electric Company (Schenectady, NY)
OSTI Identifier:
874656
Patent Number(s):
US 6435814
Assignee:
General Electric Company (Schenectady, NY) NETL
DOE Contract Number:  
FC21-95MC31176
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
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; /415/416/

Citation Formats

Yu, Yufeng Phillip, Itzel, Gary Michael, Osgood, Sarah Jane, Bagepalli, Radhakrishna, Webbon, Waylon Willard, and Burdgick, Steven Sebastian. Film cooling air pocket in a closed loop cooled airfoil. United States: N. p., 2002. Web.
Yu, Yufeng Phillip, Itzel, Gary Michael, Osgood, Sarah Jane, Bagepalli, Radhakrishna, Webbon, Waylon Willard, & Burdgick, Steven Sebastian. Film cooling air pocket in a closed loop cooled airfoil. United States.
Yu, Yufeng Phillip, Itzel, Gary Michael, Osgood, Sarah Jane, Bagepalli, Radhakrishna, Webbon, Waylon Willard, and Burdgick, Steven Sebastian. Tue . "Film cooling air pocket in a closed loop cooled airfoil". United States. https://www.osti.gov/servlets/purl/874656.
@article{osti_874656,
title = {Film cooling air pocket in a closed loop cooled airfoil},
author = {Yu, Yufeng Phillip and Itzel, Gary Michael and Osgood, Sarah Jane and Bagepalli, Radhakrishna and Webbon, Waylon Willard and Burdgick, Steven Sebastian},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 2002},
month = {Tue Jan 01 00:00:00 EST 2002}
}

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