Hot gas components with compound angled cooling features and methods of manufacture

Patent metadata

Field	Value
Publication number	US-9708915-B2
Application number	US-201414168176-A
Country	US
Kind code	B2
Filing date	Jan 30, 2014
Priority date	Jan 30, 2014
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

A hot gas path component including a substrate having an outer surface exposed to a stream of hot gases and an inner surface exposed to a cooling flow. One or more pair of cooling supply inlets is formed at the inner surface of the substrate for receiving the cooling air flow. One or more pair of cooling supply outlets is formed at the outer surface of the substrate for discharging the cooling air flow. A cooling flow channel extends through the substrate and between each of cooling supply inlets and the cooling supply outlets for permitting passage of the cooling air flow. Each pair of the one or more pair of cooling supply outlets is configured having complementary compound angles α and β, where α 1 and α 2 are injection angle components of the cooling flow discharged from each pair of the one or more pair of cooling supply outlets and β 1 and β 2 are compound transverse angle components of the cooling flow discharged from each pair of the one or more pair of cooling supply outlets, and wherein the transverse angle components β 1 and β 2 are of the same sign.

First claim

The invention claimed is:

1. A hot gas path component comprising:
a substrate having an outer surface exposed to a stream of hot gases and an inner surface exposed to a cooling flow, the inner surface defining at least one interior space; and
one or more pair of cooling supply inlets formed at the inner surface of the substrate for receiving the cooling air flow, one or more pair of cooling supply outlets formed at the outer surface of the substrate for discharging the cooling air flow, and a cooling flow channel extending through said substrate and between each of the cooling supply inlets and cooling supply outlets for permitting passage of the cooling air flow from the cooling supply inlets to the cooling supply outlets,
wherein each pair of the one or more pair of cooling supply outlets are configured having compound angles α 1 and α 2 and β 1 and β 2 , where α 1 and α 2 are injection angle components of the cooling flow discharged from each pair of the one or more pair of cooling supply outlets measured relative to the outer and inner surfaces of the substrate and β 1 and β 2 are compound transverse angle components of the cooling flow discharged from each pair of the one or more pair of cooling supply outlets on a plane along the outer surface and relative to a z-axis aligned relative to the flow direction of the hot gases,
wherein the injection angle components α 1 and α 2 are of the same sign,
wherein the transverse angle components β 1 and β 2 are of the same sign, and
wherein each pair of the one or more pair of cooling supply outlets comprise an upstream cooling supply outlet and a downstream cooling supply outlet and wherein a cooling film generated by the cooling flow exiting the upstream cooling supply outlet shields the downstream cooling supply outlet.

2. The hot gas path component of claim 1 , wherein each cooling flow channel extends from the outer surface to the inner surface.

3. The hot gas path component of claim 1 , wherein in each pair of the one or more pair of cooling supply outlets each of the upstream cooling supply outlets has a hole diameter D 1 and each of the downstream cooling supply outlets has a hole diameter D 2 and a streamwise spacing of ΔX and a lateral spacing of ΔZ between the upstream cooling supply outlet and the downstream cooling supply outlet, where a ratio of ΔX/D is in a range of 2-10 and a ratio of ΔZ/D is in a range of plus or minus one half the ratio of a pitchwise spacing (P) between the downstream cooling supply outlet of each pair of the one or more pair of cooling supply outlets to an upstream cooling supply outlet of an adjacent pair of cooling supply outlets to the hole diameter D, where D is equal to the larger of D 1 and D 2 (±½ *P/D), in the presence of two or more pairs of cooling supply outlets and wherein D is equal to the larger of D 1 and D 2 when D 1 and D 2 are not equal.

4. The hot gas path component of claim 3 , wherein the transverse angle components β 1 and β 2 are in a range of −90° to 90°.

5. The hot gas path component of claim 4 , wherein the transverse angle components β 1 and β 2 are in a range of −45° to 45°.

6. The hot gas path component of claim 3 , wherein the transverse angle components β 1 and β 2 are the same.

7. The hot gas path component of claim 3 , wherein the injection angle components α 1 and α 2 are in a range of 10° to 90° relative to one of the inner surface or the outer surface.

8. The hot gas path component of claim 7 , wherein the injection angle components α 1 and α 2 are in a range of 25° to 45° relative to one of the inner surface or the outer surface.

9. The hot gas path component of claim 3 , wherein the transverse angle components β 1 and β 2 are in a range of −45° to 45° and the injection angle components α 1 and α 2 are in a range of 25° to 45° relative to one of the inner surface or the outer surface.

10. A wall of a hot gas path component comprising:
opposite inner and outer surfaces having two or more compound angled film cooling holes extending longitudinally therethrough and between two or more cooling supply inlets formed at the inner surface for receiving a cooling flow and two or more cooling supply outlets formed at the outer surface for discharging the cooling flow, each of the two or more cooling supply inlets in fluid communication with one of the two or more cooling supply outlets via a cooling flow channel,
the two or more compound angled film cooling holes configured in pairs having compound angles α 1 and α 2 and β 1 and β 2 , where α 1 and α 2 are injection angle components of the cooling flow discharged from a pair of cooling supply outlets measured relative to the outer and inner surfaces of the wall and β 1 and β 2 are compound transverse angle components of the cooling flow discharged from the pair of cooling supply outlets on a plane along the outer surface and relative to a z-axis aligned relative to a flow direction of external hot gases,
wherein the injection angle components α 1 and α 2 are of the same sign,
wherein the transverse angle components β 1 and β 2 are of the same sign, and
wherein each pair of the two or more cooling supply outlets comprise an upstream cooling supply outlet and a downstream cooling supply outlet and wherein a cooling film generated by the cooling flow exiting the upstream supply outlet shields the downstream supply outlet.

11. The wall of the hot gas path component of claim 10 , wherein each cooling flow channel extends from the outer surface to the inner surface.

12. The wall of the hot gas path component of claim 10 , wherein in each pair of the one or more pair of cooling supply outlets each of the upstream cooling supply outlets has a hole diameter D 1 and each of the downstream cooling supply outlets has a hole diameter D 2 , and a streamwise spacing of ΔX and a lateral spacing of ΔZ between the upstream cooling supply outlet and the downstream cooling supply outlet, where a ratio of ΔX/D is in a range of 2-10 and a ratio of ΔZ/D is in a range of plus or minus one half the ratio of a pitchwise spacing (P) between the downstream cooling supply outlet of each pair of the one or more pair of cooling supply outlets to an upstream cooling supply outlet of an adjacent pair of cooling supply outlets to the hole diameter D, where D is equal to the larger of D 1 and D 2 (±½ *P/D), in the presence of two or more pairs of cooling supply outlets and wherein D is equal to the larger of D 1 and D 2 when D 1 and D 2 are not equal.

13. The wall of the hot gas path component of claim 10 , wherein the transverse angle components β 1 and β 2 are directed in the same direction to each other with respect to the flow direction of external hot gases.

14. The wall of the hot gas path component of claim 13 , wherein the transverse angle components β 1 and β 2 are in a range of −90° to 90°.

15. The wall of the hot gas path component of claim 14 , wherein the injection angle components α 1 and α 2 are in a range of 10° to 90° relative to the inner surface.

16. The wall of the hot gas path component of claim 10 , wherein each of the cooling supply inlets, the cooling supply outlets and the cooling supply channels is configured having a substantially round geometry.

Assignees

• Gen Electric

Inventors

• Barr Brian Chandler
• Claretti Roberto

Classifications

• F05D2250/312

  the axes being parallel to each other · CPC title

• Y02T50/673

  Cross-Sectional Technologies · mapped topic

• F23R3/06

  Arrangement of apertures along the flame tube · CPC title

• F01D9/065

  Fluid supply or removal conduits traversing the working fluid flow, e.g. for lubrication-, cooling-, or sealing fluids (see also F01D25/16, F01D25/24 and F01D25/26) · CPC title

• Y02T50/672

  Cross-Sectional Technologies · mapped topic