Internally cooled gas turbine airfoil and method
AssigneePratt & Whitney Canada Corp.
InventorMichael Papple
Life of this patent
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Abstract
An internally cooled airfoil for a gas turbine engine, wherein a plurality of elongated cooling fins are provided inside the concave sidewall between two crossovers.
Claims21
An internally cooled airfoil for a gas turbine engine, the airfoil having at least one internal cooling passageway generally positioned between opposite concave and convex sidewalls, and a trailing edge outlet, the airfoil comprising:
- two spaced-apart crossovers located in the passageway and being adjacent to the trailing edge outlet, each crossover comprising a plurality of crossover holes, the crossovers being extending from the concave sidewall to the convex sidewall;
- and
- a plurality of elongated cooling fins provided inside the concave sidewall between the two crossovers.
An airfoil for use in a gas turbine engine, the airfoil comprising a convex side, a concave side and a trailing edge at a rearmost portion of the airfoil, the airfoil having at least one internal cooling passageway with a first and a second crossover set across an airflow cooling path, the airfoil comprising a plurality of cooling fins located inside the cooling passageway and attached on the concave side between the two crossovers.
A method of enhancing the cooling of an airfoil in a gas turbine engine, the airfoil comprising at least one internal cooling passageway generally situated between a concave sidewall and a convex sidewall, the method comprising:
- providing a first and a second crossover in the passageway, each crossover comprising a plurality of crossover holes;
- providing a plurality of elongated cooling fins inside the concave sidewall between the first and second crossovers;
- and
- circulating an airflow in the passageway, the air flowing through the crossover holes of the first crossover and then over the fins before flowing through the crossover holes of the second crossover.
Dependencies are inferred from the claim text.