Turbine airfoil with near-wall impingement and vortex cooling
First Claim
1. An insert for use in a turbine airfoil, comprising:
- a first rib extending from a pressure side to a suction side of the insert and forming a first impingement cavity;
a second rib extending from the pressure side to the suction side of the insert and forming a second impingement cavity adjacent to the first impingement cavity;
a plurality of impingement cooling holes spaced along the insert in the first impingement cavity;
a first insert support member extending from an insert wall of the second impingement cavity;
at least one inlet cooling hole in the second impingement cavity wall of the insert and located between the first impingement cavity and the first insert support member; and
,a plurality of impingement cooling holes in the second impingement cavity wall of the insert and located between the first insert support member and the second rib.
3 Assignments
0 Petitions
Accused Products
Abstract
An apparatus and method for impingement cooling of a turbine vane, in which the vane includes an insert having a plurality of impingement cavities formed therein and in series such that cooling air flows from a first impingement cavity onto the wall for impingement cooling, and is then directed into the second impingement cavity and redirected for impingement cooling on another part of the wall. Supports for the insert form seals that direct cooling air from one impingement cavity into the next impingement cavity in the series. A trailing edge impingement cavity directs cooling air through holes to provide impingement cooling to the trailing edge region, the cooling air passing through a trailing edge discharge passage to cool the trailing edge. The insert is formed as a single piece, and has from 3 to 5 impingement cavities separated by ribs.
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Citations
20 Claims
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1. An insert for use in a turbine airfoil, comprising:
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a first rib extending from a pressure side to a suction side of the insert and forming a first impingement cavity; a second rib extending from the pressure side to the suction side of the insert and forming a second impingement cavity adjacent to the first impingement cavity; a plurality of impingement cooling holes spaced along the insert in the first impingement cavity; a first insert support member extending from an insert wall of the second impingement cavity; at least one inlet cooling hole in the second impingement cavity wall of the insert and located between the first impingement cavity and the first insert support member; and
,a plurality of impingement cooling holes in the second impingement cavity wall of the insert and located between the first insert support member and the second rib. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A turbine vane used in a gas turbine engine, the vane comprising:
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a wall forming an airfoil surface of the vane and forming a hollow opening for passage of a cooling fluid; a plurality of insert support members extending from the vane wall; an insert having a first and a second rib extending from the sides to form a first impingement cavity and a second impingement cavity; a plurality of impingement cooling holes located on an insert wall of the first impingement cavity; a first insert support member extending from the insert wall of the second impingement cavity and engaging with the insert support member of the vane wall to provide a seal between the vane wall and the insert; a cooling inlet hole located in the insert wall of the second impingement cavity at a location between the first insert support member and the first rib; and
,a plurality of impingement cooling holes in the insert wall of the second impingement cavity at a location between the first insert support member and the second rib. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A process for impingement cooling of a turbine vane, the turbine vane having an insert within a hollow section of the vane, the process comprising:
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supplying cooling air to a first impingement cavity of the insert; directing impinging air from the first impingement cavity formed in the insert onto an inner wall of the vane; channeling the cooling air from the first impingement cavity into a second impingement cavity formed in the insert located adjacent to the first impingement cavity; directing impinging air from the second impingement cavity onto the inner wall of the vane; and
,channeling the cooling air from the second impingement cavity into a third impingement cavity of the insert located adjacent to the second impingement cavity. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification