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Title: Internal cooling system with converging-diverging exit slots in trailing edge cooling channel for an airfoil in a turbine engine

An airfoil (10) is disclosed for a gas turbine engine in which the airfoil (10) includes an internal cooling system (14) with one or more converging-diverging exit slots (20) configured to increase the effectiveness of the cooling system (14) at the trailing edge (34) of the airfoil (10) by increasing the contact of cooling fluids with internal surfaces (24, 30) of the pressure and suction sides (36, 38) of the airfoil (10). In at least one embodiment, the trailing edge cooling channel (18) may include one or more converging-diverging exit slots (20) to further pressurize the trailing edge cooling channel (18) and may be formed by a first and second ribs (80, 82) extending between an outer walls (13, 12) forming the pressure and suction sides (36, 38). The converging-diverging exit slot (20) may be formed from a first converging section (84) having an inlet (86) with a larger cross-sectional area than an outlet (88) and is formed from a second diverging section (90) having an inlet (92) with a smaller cross-sectional area than an outlet (94).
Inventors:
; ; ;
Issue Date:
OSTI Identifier:
1473671
Assignee:
Siemens Energy, Inc. (Orlando, FL) NETL
Patent Number(s):
10,060,270
Application Number:
15/552,882
Contract Number:
FC26-05NT42644
Resource Relation:
Patent File Date: 2015 Mar 17
Research Org:
Siemens Energy, Inc., Orlando, FL (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Other works cited in this record:

Hot gas overheat protection device for gas turbine engines
patent, July 1991

Turbine blade trailing edge cooling openings and slots
patent, January 2001

Foil formed structure for turbine airfoil trailing edge
patent, April 2003

Methods and apparatus for cooling turbine blade trailing edges
patent, June 2008

Casting Core For A Cooling Arrangement For A Gas Turbine Component
patent-application, April 2014

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