초록 ▼

A cooling channel (36, 36B) cools an exterior surface (40 or 42) or two opposed exterior surfaces (40 and 42). The channel has a near-wall inner surface (48, 50) with a width (W1). Interior side surfaces (52, 54) may converge to a reduced channel width (W2). The near-wall inner surface (48, 50) may

A cooling channel (36, 36B) cools an exterior surface (40 or 42) or two opposed exterior surfaces (40 and 42). The channel has a near-wall inner surface (48, 50) with a width (W1). Interior side surfaces (52, 54) may converge to a reduced channel width (W2). The near-wall inner surface (48, 50) may have fins (44) aligned with a coolant flow (22). The fins may highest at mid-width of the near-wall inner surface. A two-sided cooling channel (36) may have two near-wall inner surfaces (48, 50) parallel to two respective exterior surfaces (40, 42), and may have an hourglass shaped transverse sectional profile. The tapered channel width (W1, W2) and the fin height profile (56A, 56B) increases cooling flow (22) into the corners (C) of the channel for more uniform and efficient cooling.

대표청구항 ▼

1. A cooling channel in a component, the cooling channel comprising: a first near-wall inner surface parallel to a first exterior surface of the component;a first plurality of parallel fins on the first near-wall inner surface that are aligned with a flow direction of the cooling channel;wherein the

1. A cooling channel in a component, the cooling channel comprising: a first near-wall inner surface parallel to a first exterior surface of the component;a first plurality of parallel fins on the first near-wall inner surface that are aligned with a flow direction of the cooling channel;wherein the first plurality of parallel fins comprises a height profile that is convex across a width of the first near-wall inner surface as viewed in a transverse section plane of the cooling channel, wherein the transverse section plane is normal to the flow direction; andfirst and second interior side surfaces that taper toward each other from respective first and second opposite sides of the first near-wall inner surface to define a reduced channel width away from the first near-wall inner surface that is 80% or less of the width of the first near-wall inner surface as viewed in the transverse section plane. 2. The cooling channel of claim 1, further comprising: a second near-wall inner surface parallel to a second exterior surface of the component; anda second plurality of parallel fins on the second near-wall inner surface that are aligned with the flow direction of the cooling channel;wherein the second plurality of parallel fins comprises a height profile that is convex across a width of the second near-wall inner surface as viewed in the transverse section plane. 3. The cooling channel of claim 2, wherein the first and second interior side surfaces are convex, and define an hourglass shaped transverse sectional profile of the cooling channel with a waist width that is less than the width of the first near-wall inner surface. 4. A series of cooling channels according to claim 2, forming coolant exit channels in a trailing edge portion of a turbine airfoil. 5. The cooling channel of claim 1, wherein a transverse sectional profile of the cooling channel is trapezoidal, and the first near-wall inner surface defines a longest side thereof. 6. A first series of cooling channels according to claim 5, each of which is parallel to the first exterior surface of the component, and a second series of cooling channels according to claim 5, each of which is parallel to a second exterior surface of the component, the first and second exterior surfaces of the component defining a trailing edge portion of a turbine airfoil. 7. A turbine airfoil comprising the cooling channel of claim 1. 8. A coolant exit channel in a trailing edge portion of a turbine airfoil, comprising: a first near-wall inner surface parallel to a first exterior surface of the trailing edge portion;two interior side surfaces that taper toward each other from opposite sides of the first near-wall inner surface to a minimum channel width that is 80% or less of a width of the near-wall inner surface as viewed in a transverse section plane of the cooling channel, wherein the transverse section plane is normal to a flow direction of the coolant exit channel; anda plurality of fins on the first near-wall inner surface that are aligned with the flow direction of the coolant exit channel, the plurality of fins following a convex height profile across the width of the first near-wall inner surface as viewed in the transverse section plane of the cooling channel. 9. The coolant exit channel of claim 8, further comprising: a second near-wall inner surface parallel to a second exterior surface of the trailing edge portion; anda second plurality of parallel fins on the second near-wall inner surface that are aligned with the flow direction of the coolant exit channel, and that follow a convex height profile across a width of the second near-wall inner surface as viewed in the transverse section plane of the cooling channel; andwherein the two interior side surfaces span between respective first and second sides of the first and second near-wall inner surfaces, forming a tapered shaped transverse sectional profile of the coolant exit channel as viewed in the transverse section plane of the cooling channel. 10. The coolant exit channel of claim 8, wherein a transverse sectional profile of the coolant exit channel is trapezoidal, and the first near-wall inner surface defines a longest side thereof. 11. A first series of cooling channels according to claim 8, each of which is parallel to the first exterior surface of the trailing edge portion, and a second series of cooling channels according to claim 8, each of which is parallel to and relates to a second exterior surface of the trailing edge portion. 12. A cooling channel in a component, the cooling channel comprising: a first near-wall inner surface parallel to a first exterior surface of the component;a tapered transverse sectional profile that is wider at the first near-wall inner surface and narrower away from the first near-wall inner surface as viewed in a transverse section plane of the cooling channel, wherein the transverse section plane is normal to a flow direction of the coolant exit channel; andat least one cooling fin on the first near-wall inner surface aligned with the flow direction of the cooling channel;wherein the cooling channel guides a coolant flow therein preferentially toward near-wall distal corners of the cooling channel as viewed in the transverse section plane of the cooling channel. 13. The cooling channel of claim 12, comprising a plurality of cooling fins on the first near-wall inner surface aligned with the flow direction, wherein the plurality of cooling fins range in height, being tallest at a mid-width of the first near-wall inner surface as viewed in the transverse section plane of the cooling channel. 14. The cooling channel of claim 13, further comprising: a second near-wall inner surface parallel to a second exterior surface of the component; anda second plurality of cooling fins on the second near-wall inner surface, the second plurality of cooling fins aligned with the flow direction of the cooling channel;wherein the second plurality of cooling fins range in height, being tallest at a mid-width of the second near-wall inner surface as viewed in the transverse section plane of the cooling channel; andfirst and second interior side surfaces between respective first and second sides of the first and second near-wall inner surfaces. 15. The cooling channel of claim 14, wherein the first and second interior side surfaces are convex, and define an hourglass shape in a transverse sectional profile of the cooling channel, the hourglass shape comprising a waist width that is 65% or less of a width of the first near-wall inner surface. 16. A series of cooling channels formed according to claim 14 as coolant exit channels in a trailing edge portion of a turbine airfoil. 17. A first series of cooling channels formed according to claim 14, each of which is parallel to the first exterior surface of the component, and a second series of cooling channels formed according to claim 14, each of which is parallel to and relates to a second exterior surface of the component. 18. The series of cooling channels of claim 17 forming coolant exit channels in a trailing edge of a turbine airfoil.