Divoted airfoil baffle having aimed cooling holes
First Claim
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1. A baffle insert for an internally cooled airfoil, the baffle insert comprising:
- a liner having a continuous perimeter formed to shape a hollow body having a first end and a second end;
a divoted segment of the hollow body positioned between the first end and the second end; and
a plurality of cooling holes positioned on the divoted segment to aim cooling air exiting the baffle insert;
wherein the divoted segment comprises an elongate, longitudinal depression in the hollow body extending between the first end and the second end, the depression comprising;
a first curved segment having a first column of cooling holes;
a second curved segment having a second column of cooling holes; and
an elbow segment connecting the first curved segment with the second curved segment and having a third column of cooling holes centered on the divoted segment.
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Abstract
A baffle insert for an internally cooled airfoil comprises a liner, a divoted segment and a plurality of cooling holes. The liner has a continuous perimeter formed to shape a hollow body having a first end and a second end. The divoted segment of the hollow body is positioned between the first end and the second end. The plurality of cooling holes is positioned on the divoted segment to aim cooling air exiting the baffle insert at a common location.
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Citations
20 Claims
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1. A baffle insert for an internally cooled airfoil, the baffle insert comprising:
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a liner having a continuous perimeter formed to shape a hollow body having a first end and a second end; a divoted segment of the hollow body positioned between the first end and the second end; and a plurality of cooling holes positioned on the divoted segment to aim cooling air exiting the baffle insert; wherein the divoted segment comprises an elongate, longitudinal depression in the hollow body extending between the first end and the second end, the depression comprising; a first curved segment having a first column of cooling holes; a second curved segment having a second column of cooling holes; and an elbow segment connecting the first curved segment with the second curved segment and having a third column of cooling holes centered on the divoted segment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An internally cooled airfoil comprising:
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an outer airfoil body shaped to form a leading edge, a trailing edge, a pressure side and a suction side surrounding an internal cooling channel; and a baffle insert disposed within the internal cooling channel, the baffle insert comprising; a continuous inner liner body having a perimeter shaped to correspond to the shape of the internal cooling channel and to form a cooling air supply duct; a divot disposed along the inner liner body; and a plurality of cooling holes positioned on the divot to aim cooling air from the supply duct onto the outer airfoil body at a common location; wherein the divot comprises; a first leg including a first column of cooling holes configured to direct cooling air at an oblique angle to the internal cooling channel; a second leg including a second column of cooling holes configured to direct cooling air at an oblique angle to the internal cooling channel; and an elbow connecting the first leg with the second leg, the elbow including a third column of cooling holes configured to direct cooling air normal to the internal cooling channel. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A baffle for providing impingement cooling to an interior of an airfoil, the baffle comprising:
- a plurality of equally sized cooling holes disposed along a continuous contour in the baffle such that cooling air emanating from the cooling holes is entrained before impacting the airfoil, wherein the baffle is comprised of sheet metal, wherein the contour comprises an elbow segment connecting a first curved segment with a second curved segment and having a central column of cooling holes, wherein the central column of cooling holes is centered on the continuous contour in the baffle.
- View Dependent Claims (18, 19, 20)
Specification