초록 ▼

A hollow airfoil is provided which includes a body, a trench, and a plurality of cooling apertures disposed within the trench. The body extends chordwise between a leading edge and a trailing edge, and spanwise between an outer radial surface and an inner radial surface, and includes an external wal

A hollow airfoil is provided which includes a body, a trench, and a plurality of cooling apertures disposed within the trench. The body extends chordwise between a leading edge and a trailing edge, and spanwise between an outer radial surface and an inner radial surface, and includes an external wall surrounding a cavity. The trench is disposed in the external wall along the leading edge, extends in a spanwise direction, and is aligned with a stagnation line extending along the leading edge.

대표청구항 ▼

[We claim:] [1.] A method for cooling an airfoil exposed to core gas within a gas turbine engine, wherein the airfoil has a body that includes an external wall that surrounds an internal cavity, and a spanwise extending leading edge, comprising the steps of:providing an open trench disposed in the e

[We claim:] [1.] A method for cooling an airfoil exposed to core gas within a gas turbine engine, wherein the airfoil has a body that includes an external wall that surrounds an internal cavity, and a spanwise extending leading edge, comprising the steps of:providing an open trench disposed in the external wall along the leading edge, said trench including a first side wall, a second side wall, and a base extending between said first side wall and said second side wall;providing a plurality of cooling apertures disposed within said trench and extending through to the internal cavity;providing cooling air in the internal cavity at a temperature lower and a pressure higher than the core gas adjacent the leading edge;determining a stagnation line that coincides with a largest heat load condition for a given application; andsubstantially centering said trench on said stagnation line coinciding with said largest heat load condition for said given application;wherein said higher pressure cooling air exits the internal cavity via said cooling apertures, passes into said trench and subsequently exits said trench to form a film of cooling air downstream of said trench.