F - Mech Eng,Light,Heat,Weapons – 02 – C
Patent
F - Mech Eng,Light,Heat,Weapons
02
C
F02C 9/18 (2006.01) F01D 5/14 (2006.01) F01D 9/06 (2006.01) F02C 7/00 (2006.01)
Patent
CA 2445057
In various embodiments, the present invention provides a means for improving gas turbine engine performance by applying fluid flow control to the inter-turbine duct (20) joining a high-pressure turbine spool (17) and an associated low-pressure turbine spool (15), allowing the low-pressure turbine spool (15) to have a relatively larger diameter than the high-pressure turbine spool (17). One or more unobstructed fluid flow paths (27) between one or more boundary layer suction ports (44) disposed within the upstream end (22) of the outer-body surface (32) of the inter- turbine duct (20) and the suction side of the associated low-pressure turbine nozzle (12) are provided. Advantageously, the natural static pressure difference between these points results in a self aspirating assembly (10). The fluid flow control provided by the respective suction and blowing forces generated allows for a relatively larger diameter low-pressure turbine spool (15) and/or relatively fewer low-pressure turbine nozzles (12) to be used than is possible with conventional systems, assemblies, and methods. Thus, a gas turbine engine weight savings and optimized performance may be achieved.
Graziosi Paolo
Kirtley Kevin
Company General Electric
Craig Wilson And Company
LandOfFree
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