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US 8,572,844 B2Granted
Airfoil with leading edge cooling passage
AssigneeUnited Technologies Corporation
InventorJustin D. Piggush
Life of this patent
Estimating the term…
Abstract
A turbine engine airfoil includes an airfoil structure having an exterior surface that provides a leading edge. A first cooling passage includes radially spaced legs extending laterally from one side of the leading edge toward another side of the leading edge and interconnecting to form a loop with one another. A trench extends radially in the exterior surface along the leading edge. The trench intersects one of the first and second legs to provide at least one first cooling hole in the trench.
Claims10
A turbine engine airfoil comprising:
- an airfoil structure including an exterior surface providing leading edge, a first cooling passage including radially spaced legs extending laterally from one side of the leading edge toward another side of the leading edge and interconnecting to form a loop with one another, a trench extending radially in the exterior surface along the leading edge, the trench intersecting one of the first and second legs of multiple loops to provide at least one first cooling hole in the trench;
- and
- a connecting portion extends radially, the first and second legs extending from the connecting portion in one direction, and a portion extends laterally from the connecting portion to a radially extending cooling channel providing fluid communication between the cooling channel and the connecting portion, the portion arranged radially between the first and second legs.
A turbine engine airfoil comprising:
- an airfoil structure including an exterior surface providing a leading edge, a first cooling passage including radially spaced legs extending laterally from one side of the leading edge toward another side of the leading edge and interconnecting to form a loop with one another, a trench extending radially in the exterior surface along the leading edge, the trench intersecting one of the first and second legs of multiple loops to provide at least one first cooling hole in the trench;
- and
- the trench intersects only one of the first and second legs.
A turbine engine airfoil comprising:
- an airfoil structure including an exterior surface providing a leading edge, a first cooling passage including radially spaced legs extending laterally from one side of the leading edge toward another side of the leading edge and interconnecting to form a loop with one another, a trench extending radially in the exterior surface along the leading edge. the trench intersecting one of the first and second legs of multiple loops to provide at least one first cooling hole in the trench;
- and
- the exterior surface at the leading edge has a contour and the loop includes a shape that is generally the same as the contour.
A turbine engine airfoil comprising:
- an airfoil structure including an exterior surface providing a leading edge, a first cooling passage including radially spaced legs extending laterally from one side of the leading edge toward another side of the leading edge and interconnecting to form a loop with one another, a trench extending radially in the exterior surface along the leading edge, the trench intersecting one of the first and second legs of multiple loops to provide at least one first cooling hole in the trench, the one of the first and second legs provides a pair of first cooling holes opposite one another in the trench;
- and
- the one of the first and second legs includes an S-shaped bend, the trench intersecting the S-shaped bend and orienting the pair of first cooling holes in a non-collinear relationship to one another.
A core for manufacturing an airfoil comprising:
- a core structure having multiple generally U-shaped loops spaced from one another along a first direction, the loops each including first and second legs forming the U-shape, the first leg canted relative to the second leg such that one of the first leg is offset relative to the second leg in a second direction different than the first direction;
- and
- a longitudinally extending connecting portion, each of the first and second legs of the loops interconnected to the connecting portion providing discrete loops that are each joined to the connecting portion.
Dependencies are inferred from the claim text.