Turbine airfoil with integrated impingement and serpentine cooling circuit
First Claim
1. An airfoil for a gas turbine engine having a longitudinal axis, said airfoil including a root, a tip, a leading edge, a trailing edge, and opposed pressure and suction sidewalls, and comprising:
- a generally radially-extending first cooling channel disposed between said pressure and suction sidewalls adjacent said leading edge;
a generally radially-extending second cooling channel disposed aft of said first cooling channel, said second cooling channel being closed off at an outer end thereof and disposed in fluid communication with a forward inlet an inner end thereof;
a generally radially extending partition having a plurality of impingement holes disposed between said first and second cooling channels; and
a generally axially extending end channel disposed radially outward from said second cooling channel in fluid communication with said first cooling channel and with a first dust hole disposed in said tip cap, said first dust hole sized to permit the exit of debris entrained in a flow of cooling air from said airfoil.
1 Assignment
0 Petitions
Accused Products
Abstract
An airfoil for a gas turbine engine includes a generally radially-extending first cooling channel disposed between pressure and suction sidewalls adjacent the leading edge of the airfoil, and a generally radially-extending second cooling channel disposed aft of the first cooling channel. The second cooling channel is closed off at an outer end thereof and is disposed in fluid communication with a forward inlet an inner end thereof. The first and second cooling channels are separated by a partition having a plurality of impingement holes therein. A generally axially extending end channel is disposed radially outward from the second cooling channel in fluid communication with the first cooling channel and with a dust hole disposed in the tip cap. The dust hole is sized to permit the exit of debris entrained in a flow of cooling air from the airfoil.
29 Citations
20 Claims
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1. An airfoil for a gas turbine engine having a longitudinal axis, said airfoil including a root, a tip, a leading edge, a trailing edge, and opposed pressure and suction sidewalls, and comprising:
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a generally radially-extending first cooling channel disposed between said pressure and suction sidewalls adjacent said leading edge; a generally radially-extending second cooling channel disposed aft of said first cooling channel, said second cooling channel being closed off at an outer end thereof and disposed in fluid communication with a forward inlet an inner end thereof; a generally radially extending partition having a plurality of impingement holes disposed between said first and second cooling channels; and a generally axially extending end channel disposed radially outward from said second cooling channel in fluid communication with said first cooling channel and with a first dust hole disposed in said tip cap, said first dust hole sized to permit the exit of debris entrained in a flow of cooling air from said airfoil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A turbine blade for a gas turbine engine, comprising:
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a dovetail adapted to be received in a disk rotatable about a longitudinal axis; a laterally-extending platform disposed radially outwardly from said dovetail; and an airfoil including a root, a tip, a leading edge, a trailing edge, and opposed pressure and suction sidewalls, said airfoil comprising; a generally radially-extending first cooling channel disposed between said pressure and suction sidewalls adjacent said leading edge; a generally radially-extending second cooling channel disposed aft of said first cooling channel, said second cooling channel being closed off at an outer end thereof and disposed in fluid communication with a forward inlet an inner end thereof; a generally radially extending partition having a plurality of impingement holes disposed between said first and second cooling channels; and a generally axially extending end channel disposed radially outward from said second cooling channel in fluid communication with said first cooling channel and with a first dust hole disposed in said tip cap, said first dust hole sized to permit the exit of debris entrained in a flow of cooling air from said airfoil. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification