Turbine blade for gas turbine engine and method of cooling same
First Claim
Patent Images
1. A turbine blade comprising:
- a platform having an internal cavity formed therein;
an airfoil extending radially from said platform;
an internal cooling circuit formed in said airfoil for circulating a coolant therethrough, said internal cooling circuit including a plurality of radially extending cavities fluidly connected in series in a serpentine arrangement with two of said radially extending cavities being connected at a turn; and
at least one supply passage extending between said turn and said internal cavity.
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Abstract
A turbine blade includes a platform having an internal cavity formed therein and an airfoil extending radially from the platform. An internal cooling circuit is formed in the airfoil for circulating a coolant therethrough, and at least one supply passage extends between the internal cooling circuit and the internal platform cavity for diverting coolant to the internal platform cavity. The coolant is expelled from holes located in the forward and aft edges of the platform for purging the forward and aft disk wheel spaces and impingement cooling adjacent nozzle bands.
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Citations
20 Claims
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1. A turbine blade comprising:
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a platform having an internal cavity formed therein;
an airfoil extending radially from said platform;
an internal cooling circuit formed in said airfoil for circulating a coolant therethrough, said internal cooling circuit including a plurality of radially extending cavities fluidly connected in series in a serpentine arrangement with two of said radially extending cavities being connected at a turn; and
at least one supply passage extending between said turn and said internal cavity. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A turbine blade for use in a gas turbine engine having a turbine rotor disk, said turbine blade comprising:
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a dovetail for mounting said turbine blade to said rotor disk;
a shank extending from said dovetail;
a platform joined to said shank and having an internal cavity formed therein;
an airfoil extending radially from said platform;
an internal cooling circuit formed in said airfoil for circulating a coolant therethrough, said internal cooling circuit including a plurality of radially extending cavities fluidly connected in series in a serpentine arrangement with two of said radially extending cavities being connected at a turn; and
at least one supply passage extending between said turn and said internal cavity. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. In a gas turbine engine having a turbine rotor including at least one blade mounted to a rotor disk, said blade having a platform and an airfoil extending radially from said platform, a method of cooling said blade comprising the steps of:
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providing said airfoil with an internal cooling circuit having a plurality of radially extending cavities fluidly connected in series in a serpentine arrangement with two of said radially extending cavities being connected at a turn;
providing said platform with an internal cavity;
introducing coolant into said internal cooling circuit; and
diverting a portion of the coolant from said turn to said internal cavity. - View Dependent Claims (17, 18, 19, 20)
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Specification