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Title: Cooling circuit for steam and air-cooled turbine nozzle stage

Abstract

The turbine vane segment includes inner and outer walls with a vane extending therebetween. The vane includes leading and trailing edge cavities and intermediate cavities. An impingement plate is spaced from the outer wall to impingement-cool the outer wall. Post-impingement cooling air flows through holes in the outer wall to form a thin air-cooling film along the outer wall. Cooling air is supplied an insert sleeve with openings in the leading edge cavity for impingement-cooling the leading edge. Holes through the leading edge afford thin-film cooling about the leading edge. Cooling air is provided the trailing edge cavity and passes through holes in the side walls of the vane for thin-film cooling of the trailing edge. Steam flows through a pair of intermediate cavities for impingement-cooling of the side walls. Post-impingement steam flows to the inner wall for impingement-cooling of the inner wall and returns the post-impingement cooling steam through inserts in other intermediate cavities for impingement-cooling the side walls of the vane.

Inventors:
 [1];  [2]
  1. (Clifton Park, NY)
  2. (Guilderland, NY)
Publication Date:
Research Org.:
General Electric Company (Schenectady, NY)
OSTI Identifier:
874517
Patent Number(s):
US 6406254
Assignee:
General Electric Company (Schenectady, NY) NETL
DOE Contract Number:  
FC21-95MC31176
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
cooling; circuit; steam; air-cooled; turbine; nozzle; stage; vane; segment; inner; outer; walls; extending; therebetween; leading; trailing; edge; cavities; intermediate; impingement; plate; spaced; wall; impingement-cool; post-impingement; air; flows; holes; form; air-cooling; film; supplied; insert; sleeve; openings; cavity; impingement-cooling; afford; thin-film; provided; passes; pair; returns; inserts; air flow; steam flow; turbine vane; /415/

Citation Formats

Itzel, Gary Michael, and Yu, Yufeng. Cooling circuit for steam and air-cooled turbine nozzle stage. United States: N. p., 2002. Web.
Itzel, Gary Michael, & Yu, Yufeng. Cooling circuit for steam and air-cooled turbine nozzle stage. United States.
Itzel, Gary Michael, and Yu, Yufeng. Tue . "Cooling circuit for steam and air-cooled turbine nozzle stage". United States. https://www.osti.gov/servlets/purl/874517.
@article{osti_874517,
title = {Cooling circuit for steam and air-cooled turbine nozzle stage},
author = {Itzel, Gary Michael and Yu, Yufeng},
abstractNote = {The turbine vane segment includes inner and outer walls with a vane extending therebetween. The vane includes leading and trailing edge cavities and intermediate cavities. An impingement plate is spaced from the outer wall to impingement-cool the outer wall. Post-impingement cooling air flows through holes in the outer wall to form a thin air-cooling film along the outer wall. Cooling air is supplied an insert sleeve with openings in the leading edge cavity for impingement-cooling the leading edge. Holes through the leading edge afford thin-film cooling about the leading edge. Cooling air is provided the trailing edge cavity and passes through holes in the side walls of the vane for thin-film cooling of the trailing edge. Steam flows through a pair of intermediate cavities for impingement-cooling of the side walls. Post-impingement steam flows to the inner wall for impingement-cooling of the inner wall and returns the post-impingement cooling steam through inserts in other intermediate cavities for impingement-cooling the side walls of the vane.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

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