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Title: Film cooling for a closed loop cooled airfoil

Abstract

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.

Inventors:
 [1];  [2];  [2]
  1. (Schenectady, NY)
  2. (Simpsonville, SC)
Publication Date:
Research Org.:
General Electric Company (Schenectady, NY)
OSTI Identifier:
874986
Patent Number(s):
US 6506013
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; 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; /415/416/

Citation Formats

Burdgick, Steven Sebastian, Yu, Yufeng Phillip, and Itzel, Gary Michael. Film cooling for a closed loop cooled airfoil. United States: N. p., 2003. Web.
Burdgick, Steven Sebastian, Yu, Yufeng Phillip, & Itzel, Gary Michael. Film cooling for a closed loop cooled airfoil. United States.
Burdgick, Steven Sebastian, Yu, Yufeng Phillip, and Itzel, Gary Michael. Wed . "Film cooling for a closed loop cooled airfoil". United States. doi:. https://www.osti.gov/servlets/purl/874986.
@article{osti_874986,
title = {Film cooling for a closed loop cooled airfoil},
author = {Burdgick, Steven Sebastian and Yu, Yufeng Phillip and Itzel, Gary Michael},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 2003},
month = {Wed Jan 01 00:00:00 EST 2003}
}

Patent:

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