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Title: Turbine blade with contoured chamfered squealer tip

Patent ·
OSTI ID:1166772

A squealer tip formed from a pressure side tip wall and a suction side tip wall extending radially outward from a tip of the turbine blade is disclosed. The pressure and suction side tip walls may be positioned along the pressure sidewall and the suction sidewall of the turbine blade, respectively. The pressure side tip wall may include a chamfered leading edge with film cooling holes having exhaust outlets positioned therein. An axially extending tip wall may be formed from at least two outer linear surfaces joined together at an intersection forming a concave axially extending tip wall. The axially extending tip wall may include a convex inner surface forming a radially outer end to an inner cavity forming a cooling system. The cooling system may include one or more film cooling holes in the axially extending tip wall proximate to the suction sidewall, which promotes increased cooling at the pressure and suction sidewalls.

Research Organization:
Siemens Energy, Inc., Orlando, FL (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FC26-05NT42644
Assignee:
Siemens Energy, Inc. (Orlando, FL)
Patent Number(s):
8,920,124
Application Number:
13/767,019
OSTI ID:
1166772
Country of Publication:
United States
Language:
English

References (29)

Chordally bifurcated turbine blade patent October 1994
Turbine blade having tip slot patent April 1996
Slot cooled blade tip patent March 1998
Conduction blade tip patent April 1998
Turbine blade having recuperative trailing edge tip cooling patent July 1999
Ribbed turbine blade tip patent December 1999
Tapered tip turbine blade patent July 2000
Method and apparatus for reducing turbine blade tip temperatures patent July 2002
Airfoil tip squealer cooling construction patent August 2003
Foil formed structure for turbine airfoil tip patent October 2003
Turbine blade having angled squealer tip patent January 2004
Turbine blade tip squealer and rebuild method patent September 2007
Turbine airfoil curved squealer tip with tip shelf patent October 2007
Blunt tip turbine blade patent October 2007
Turbine airfoil with curved squealer tip patent November 2007
Turbine blade cooling system with bifurcated mid-chord cooling chamber patent August 2008
Skewed tip hole turbine blade patent March 2009
Counter tip baffle airfoil patent October 2009
Conformal tip baffle airfoil patent March 2010
Plasma blade tip clearance control patent October 2010
Method and Apparatus for Reducing Turbine Blade Tip Temperatures patent-application July 2002
Cooled thermal barrier coating on a turbine blade tip patent-application October 2002
Tip ramp turbine blade patent-application February 2008
Cascade tip baffle airfoil patent-application December 2009
Aerofoil patent-application February 2010
Turbine Blade for a Gas Turbine Engine patent-application June 2010
Flared tip turbine blade patent-application September 2010
Turbine Blade with Chamfered Squealer Tip and Convective Cooling Holes patent-application November 2012
Cooled Turbine Blade for Gas Turbine Engine patent-application June 2013

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