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Title: Turbine exhaust diffuser with region of reduced flow area and outer boundary gas flow

Patent ·
OSTI ID:1126870

An exhaust diffuser system and method for a turbine engine. The outer boundary may include a region in which the outer boundary extends radially inwardly toward the hub structure and may direct at least a portion of an exhaust flow in the diffuser toward the hub structure. At least one gas jet is provided including a jet exit located on the outer boundary. The jet exit may discharge a flow of gas downstream substantially parallel to an inner surface of the outer boundary to direct a portion of the exhaust flow in the diffuser toward the outer boundary to effect a radially outward flow of at least a portion of the exhaust gas flow toward the outer boundary to balance an aerodynamic load between the outer and inner boundaries.

Research Organization:
Siemens Energy, Inc., Orlando, FL, USA
Sponsoring Organization:
USDOE
DOE Contract Number:
FC26-05NT42644
Assignee:
Siemens Energy, Inc. (Orlando, FL)
Patent Number(s):
8,668,449
Application Number:
12/944,210
OSTI ID:
1126870
Country of Publication:
United States
Language:
English

References (21)

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Tangentially directed acoustic jet controlling boundary layer patent May 2002
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Fluidic actuation for improved diffuser performance patent May 2005
Exhaust diffuser assembly with tunable velocity profile patent September 2007
Gas turbine installation, cooling air supplying method and method of modifying a gas turbine installation patent May 2008
Multi-slot inter-turbine duct assembly for use in a turbine engine patent June 2009
Coupled parametric design of flow control and duct shape patent October 2009
Diffuser for terrestrial or aviation gas turbine patent-application July 2003
Gas turbine installation, cooling air supplying method and method of modifying a gas turbine installation patent-application March 2005
Exhaust diffuser assembly with tunable velocity profile patent-application March 2005
Augmentor with Trapped Vortex Cavity Pilot patent-application March 2009
Combustion Turbine Including a Diffuser Section with Cooling Fluid Passageways and Associated Methods patent-application October 2009
A Three-Dimensional CFD Design Study of a Circulation Control Inlet Guide Vane for a Transonic Compressor
  • Gunter, Sandra L.; Guillot, Stephen A.; Ng, Wing F.
  • ASME Turbo Expo 2009: Power for Land, Sea, and Air, Volume 7: Turbomachinery, Parts A and B https://doi.org/10.1115/GT2009-59360
conference January 2009

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