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Ambient air cooling arrangement having a pre-swirler for gas turbine engine blade cooling

United States Patent

January 6, 2015
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
A gas turbine engine including: an ambient-air cooling circuit (10) having a cooling channel (26) disposed in a turbine blade (22) and in fluid communication with a source (12) of ambient air: and an pre-swirler (18), the pre-swirler having: an inner shroud (38); an outer shroud (56); and a plurality of guide vanes (42), each spanning from the inner shroud to the outer shroud. Circumferentially adjacent guide vanes (46, 48) define respective nozzles (44) there between. Forces created by a rotation of the turbine blade motivate ambient air through the cooling circuit. The pre-swirler is configured to impart swirl to ambient air drawn through the nozzles and to direct the swirled ambient air toward a base of the turbine blade. The end walls (50, 54) of the pre-swirler may be contoured.
Lee; Ching-Pang (Cincinnati, OH), Tham; Kok-Mun (Oviedo, FL), Schroeder; Eric (Loveland, OH), Meeroff; Jamie (Cincinnati, OH), Miller, Jr.; Samuel R. (Port St. Lucie, FL), Marra; John J. (Winter Springs, FL)
Siemens Energy, Inc. (Orlando, FL)
13/ 766,909
February 14, 2013
STATEMENT REGARDING FEDERALLY SPONSORED DEVELOPMENT Development for this invention was supported in part by Contract No. DE-FC26-05NT42644, awarded by the United States Department of Energy. Accordingly, the United States Government may have certain rights in this invention.