Tip cooled blade
AssigneeGeneral Electric Company
InventorsDon Butts, John G. Nourse, Robert C. Simmons
Life of this patent
Estimating the term…
Abstract
A gas turbine engine blade includes an airfoil having first and second sides and a dovetail extending from the airfoil root. The airfoil includes a tip having a tip floor with first and second tip walls extending from the floor and spaced apart to define therebetween a tip pienum. The first tip wall is recessed at least in part from the airfoil first side to define an outwardly facing tip shelf, with the tip shelf and the first tip wall defining therebetween a trough. A plurality of cooling holes extend through the tip floor at the tip shelf for channeling cooling air from a flow channel inside the airfoil into the trough for cooling the blade tip.
Claims11
A gas turbine engine blade comprising:
- an airfoil including a first side joined to a second side at spaced apart leading and trailing edges to define therein a flow channel for channeling cooling air through said airfoil to cool said airfoil from combustion gases flowable over said first and second sides, said airfoil having a tip and a root;
- a dovetail extending from said airfoil root for mounting said blade to a rotor disk;
- and said airfoil tip including:
- a tip floor extending between said airfoil first and second sides and between said leading and trailing edges for enclosing said airfoil for containing said cooling air in said flow channel;
- a first tip wall extending from said tip floor at said airfoil first side to form an extension thereof;
- a second tip wall extending from said tip floor at said airfoil second side to form an extension thereof and spaced in part from said first tip wall to define therebetween an outwardly facing tip plenum;
- said first tip wall being recessed at least in part from said airfoil first side to define an outwardly facing tip shelf extending between said leading and trailing edges to provide a discontinuity in said airfoil first side, said first tip wall and said tip shelf defining therebetween a trough;
- and
- a plurality of cooling holes extending through said tip floor at said tip shelf in flow communication between said flow channel and said trough for channeling a portion of said cooling air into said trough for cooling said blade tip.
Dependencies are inferred from the claim text.