Apparatus and methods for relieving thermally induced stresses in inner and outer bands of thermally cooled turbine nozzle stages
Abstract
To control the temperature mismatch between the inner and outer bands and covers forming plenums with the inner and outer bands on sides thereof remote from the hot gas path, passages extend from the leading edge of the covers in communication with the hot gases of combustion to the trailing edge of the covers in communication with the hot gas flowpath. A mixing chamber is provided in each passage in communication with compressor discharge air for mixing the hot gases of combustion and compressor discharge air for flow through the passage, thereby heating the cover and minimizing the temperature differential between the inner and outer bands and their respective covers. The passages are particularly useful adjacent the welded or brazed joints between the covers and inner band portions.
- Inventors:
-
- Guilderland, NY
- Clifton Park, NY
- Milton Mills, NH
- Issue Date:
- Research Org.:
- General Electric Co., Schenectady, NY (United States)
- OSTI Identifier:
- 874457
- Patent Number(s):
- 6394749
- 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:
- apparatus; methods; relieving; thermally; induced; stresses; inner; outer; bands; cooled; turbine; nozzle; stages; control; temperature; mismatch; covers; forming; plenums; remote; hot; gas; path; passages; extend; leading; edge; communication; gases; combustion; trailing; flowpath; mixing; chamber; provided; passage; compressor; discharge; air; flow; heating; cover; minimizing; differential; useful; adjacent; welded; brazed; joints; band; portions; gas flow; hot gas; hot gases; /415/
Citation Formats
Yu, Yufeng Phillip, Itzel, Gary Michael, and Correia, Victor H. S. Apparatus and methods for relieving thermally induced stresses in inner and outer bands of thermally cooled turbine nozzle stages. United States: N. p., 2002.
Web.
Yu, Yufeng Phillip, Itzel, Gary Michael, & Correia, Victor H. S. Apparatus and methods for relieving thermally induced stresses in inner and outer bands of thermally cooled turbine nozzle stages. United States.
Yu, Yufeng Phillip, Itzel, Gary Michael, and Correia, Victor H. S. Tue .
"Apparatus and methods for relieving thermally induced stresses in inner and outer bands of thermally cooled turbine nozzle stages". United States. https://www.osti.gov/servlets/purl/874457.
@article{osti_874457,
title = {Apparatus and methods for relieving thermally induced stresses in inner and outer bands of thermally cooled turbine nozzle stages},
author = {Yu, Yufeng Phillip and Itzel, Gary Michael and Correia, Victor H. S.},
abstractNote = {To control the temperature mismatch between the inner and outer bands and covers forming plenums with the inner and outer bands on sides thereof remote from the hot gas path, passages extend from the leading edge of the covers in communication with the hot gases of combustion to the trailing edge of the covers in communication with the hot gas flowpath. A mixing chamber is provided in each passage in communication with compressor discharge air for mixing the hot gases of combustion and compressor discharge air for flow through the passage, thereby heating the cover and minimizing the temperature differential between the inner and outer bands and their respective covers. The passages are particularly useful adjacent the welded or brazed joints between the covers and inner band portions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}
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