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:
-
- Schenectady, NY
- Issue Date:
- Research Org.:
- General Electric Co., Schenectady, NY (United States)
- OSTI Identifier:
- 874605
- Patent Number(s):
- 6422810
- Assignee:
- General Electric Company (Schenectady, NY)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
F - MECHANICAL ENGINEERING F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 F05D - INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- 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 = {Tue Jan 01 00:00:00 EST 2002},
month = {Tue Jan 01 00:00:00 EST 2002}
}