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Title: Exit chimney joint and method of forming the joint for closed circuit steam cooled gas turbine nozzles

Abstract

A nozzle segment for a gas turbine includes inner and outer band portions and a vane extending between the band portions. The inner and outer band portions are each divided into first and second plenums separated by an impingement plate. Cooling steam is supplied to the first cavity for flow through the apertures to cool the outer nozzle wall. The steam flows through a leading edge cavity in the vane into the first cavity of the inner band portion for flow through apertures of the impingement plate to cool the inner nozzle wall. Spent cooling steam flows through a plurality of cavities in the vane, exiting through an exit chimney in the outer band. The exit chimney is secured at its inner end directly to the nozzle vane wall surrounding the exit cavities, to the margin of the impingement plate at a location intermediate the ends of the exit chimney and to margins of an opening through the cover whereby each joint is externally accessible for joint formation and for subsequent inspection.

Inventors:
 [1];  [1]
  1. (Schenectady, NY)
Publication Date:
Research Org.:
General Electric Company (Schenectady, NY)
OSTI Identifier:
874605
Patent Number(s):
US 6422810
Assignee:
General Electric Company (Schenectady, NY) NETL
DOE Contract Number:  
FC21-95MC31176
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
exit; chimney; joint; method; forming; closed; circuit; steam; cooled; gas; turbine; nozzles; nozzle; segment; inner; outer; band; portions; vane; extending; divided; plenums; separated; impingement; plate; cooling; supplied; cavity; flow; apertures; cool; wall; flows; leading; edge; portion; spent; plurality; cavities; exiting; secured; directly; surrounding; margin; location; intermediate; margins; cover; externally; accessible; formation; subsequent; inspection; gas turbine; closed circuit; nozzle segment; /415/

Citation Formats

Burdgick, Steven Sebastian, and Burns, James Lee. Exit chimney joint and method of forming the joint for closed circuit steam cooled gas turbine nozzles. United States: N. p., 2002. Web.
Burdgick, Steven Sebastian, & Burns, James Lee. Exit chimney joint and method of forming the joint for closed circuit steam cooled gas turbine nozzles. United States.
Burdgick, Steven Sebastian, and Burns, James Lee. Tue . "Exit chimney joint and method of forming the joint for closed circuit steam cooled gas turbine nozzles". United States. https://www.osti.gov/servlets/purl/874605.
@article{osti_874605,
title = {Exit chimney joint and method of forming the joint for closed circuit steam cooled gas turbine nozzles},
author = {Burdgick, Steven Sebastian and Burns, James Lee},
abstractNote = {A nozzle segment for a gas turbine includes inner and outer band portions and a vane extending between the band portions. The inner and outer band portions are each divided into first and second plenums separated by an impingement plate. Cooling steam is supplied to the first cavity for flow through the apertures to cool the outer nozzle wall. The steam flows through a leading edge cavity in the vane into the first cavity of the inner band portion for flow through apertures of the impingement plate to cool the inner nozzle wall. Spent cooling steam flows through a plurality of cavities in the vane, exiting through an exit chimney in the outer band. The exit chimney is secured at its inner end directly to the nozzle vane wall surrounding the exit cavities, to the margin of the impingement plate at a location intermediate the ends of the exit chimney and to margins of an opening through the cover whereby each joint is externally accessible for joint formation and for subsequent inspection.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

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