Film cooling air pocket in a closed loop cooled airfoil
Abstract
Turbine stator vane segments have radially inner and outer walls with vanes extending between them. 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. To provide for air film cooing of select portions of the airfoil outer surface, at least one air pocket is defined on a wall of at least one of the cavities. Each air pocket is substantially closed with respect to the cooling medium in the cavity and cooling air pumped to the air pocket flows through outlet apertures in the wall of the airfoil to cool the same.
- Inventors:
-
- Simpsonville, SC
- East Thetford, VT
- Schenectady, NY
- Greenville, SC
- Issue Date:
- Research Org.:
- General Electric Co., Schenectady, NY (United States)
- OSTI Identifier:
- 874656
- Patent Number(s):
- 6435814
- 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 F02 - COMBUSTION ENGINES F02C - GAS-TURBINE PLANTS
- DOE Contract Number:
- FC21-95MC31176
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- film; cooling; air; pocket; closed; loop; cooled; airfoil; turbine; stator; vane; segments; radially; inner; outer; walls; vanes; extending; compartmentalized; impingement; plates; steam; flowing; wall; plenum; passes; plate; upper; surface; spent; flows; cavities; inserts; return; surfaces; provide; cooing; select; portions; defined; substantially; medium; cavity; pumped; outlet; apertures; cool; upper surface; steam flow; radially inner; cooled air; vanes extend; /415/416/
Citation Formats
Yu, Yufeng Phillip, Itzel, Gary Michael, Osgood, Sarah Jane, Bagepalli, Radhakrishna, Webbon, Waylon Willard, and Burdgick, Steven Sebastian. Film cooling air pocket in a closed loop cooled airfoil. United States: N. p., 2002.
Web.
Yu, Yufeng Phillip, Itzel, Gary Michael, Osgood, Sarah Jane, Bagepalli, Radhakrishna, Webbon, Waylon Willard, & Burdgick, Steven Sebastian. Film cooling air pocket in a closed loop cooled airfoil. United States.
Yu, Yufeng Phillip, Itzel, Gary Michael, Osgood, Sarah Jane, Bagepalli, Radhakrishna, Webbon, Waylon Willard, and Burdgick, Steven Sebastian. Tue .
"Film cooling air pocket in a closed loop cooled airfoil". United States. https://www.osti.gov/servlets/purl/874656.
@article{osti_874656,
title = {Film cooling air pocket in a closed loop cooled airfoil},
author = {Yu, Yufeng Phillip and Itzel, Gary Michael and Osgood, Sarah Jane and Bagepalli, Radhakrishna and Webbon, Waylon Willard and Burdgick, Steven Sebastian},
abstractNote = {Turbine stator vane segments have radially inner and outer walls with vanes extending between them. 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. To provide for air film cooing of select portions of the airfoil outer surface, at least one air pocket is defined on a wall of at least one of the cavities. Each air pocket is substantially closed with respect to the cooling medium in the cavity and cooling air pumped to the air pocket flows through outlet apertures in the wall of the airfoil to cool the same.},
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}
}
Works referenced in this record:
Development Requirements for an Advanced Gas Turbine System
journal, October 1995
- Bannister, R. L.; Cheruvu, N. S.; Little, D. A.
- Journal of Engineering for Gas Turbines and Power, Vol. 117, Issue 4
Advances in Steam Path Technology
journal, April 1996
- Cofer, J. I.
- Journal of Engineering for Gas Turbines and Power, Vol. 118, Issue 2