A dilution hole assembly is provided for a combustor. The dilution hole assembly includes a first wall and at least one outer vane. The first wall extends continuously about a centerline and defines a radially inward hole. The at least one outer vane projects radially inward from the first wall for
A dilution hole assembly is provided for a combustor. The dilution hole assembly includes a first wall and at least one outer vane. The first wall extends continuously about a centerline and defines a radially inward hole. The at least one outer vane projects radially inward from the first wall for swirling at least a portion of air flowing through the hole.
대표청구항▼
1. A dilution hole assembly positioned on a combustion liner disposed about an axis and forming a combustion chamber, the dilution hole assembly comprising: a first wall extending continuously about a centerline and defining a radially inward hole for providing cooling dilution air flow radially int
1. A dilution hole assembly positioned on a combustion liner disposed about an axis and forming a combustion chamber, the dilution hole assembly comprising: a first wall extending continuously about a centerline and defining a radially inward hole for providing cooling dilution air flow radially into the combustion chamber with respect to the axis, the hole disposed downstream of a forwardmost end of the combustion chamber; andat least one outer vane projecting radially inward from the first wall with respect to the centerline for swirling at least a portion of air flowing through the hole;a second wall extending continuously about the centerline and spaced radially inward from the first wall, wherein a first portion of the hole contains the at least one outer vane with each outer vane extending radially between and engaged to the first and the second walls; andat least one inner vane projecting radially inward from the second wall, and spaced circumferentially about the centerline. 2. The dilution hole assembly set forth in claim 1, the at least one inner vane and the at least one outer vane are in counter swirling relationship to one-another. 3. The dilution hole assembly set forth in claim 2 further comprising: a third wall extending continuously about the centerline and spaced radially inward from the second wall, wherein a second portion of the hole, radially inward of the first portion and radially inward of and bounded by the second wall contains the at least one inner vane with each inner vane extending radially between the second and third walls. 4. The dilution hole assembly set forth in claim 3, wherein the hole includes a third portion radially inward of and bounded by the third wall and configured for flowing air generally parallel to the centerline. 5. The dilution hole assembly set forth in claim 3, wherein the third wall is generally conical for impinging air that flows through the second portion against air that flows through the first portion. 6. The dilution hole assembly set forth in claim 1, wherein a second portion of the hole is radially inward of and bounded by the second wall, and the second wall is generally conical for impinging air that flows through the first portion against air that flows through the second portion of the hole radially inward of the second wall. 7. The dilution hole assembly set forth in claim 1, wherein a respective outer vane has an air jet passage having an inlet communicating through the first wall and an outlet communicating through the respective outer vane and in direct fluid communication with the hole for creating air turbulence. 8. The dilution hole assembly set forth in claim 7, wherein the outlet is carried by a suction side of the respective outer vane. 9. The dilution hole assembly of claim 1, wherein a cross-sectional area of an inner portion of the hole formed within and by the second wall increases as the inner portion extends along the centerline from an upstream end of the second wall to a downstream end of the second wall. 10. The dilution hole assembly of claim 9, wherein a cross-sectional area of the first portion decreases as the first portion extends along the centerline from the upstream end of the second wall to the downstream end of the second wall. 11. A combustor comprising: a forwardmost end that includes a fuel nozzle;a liner disposed about an axis and defining a combustion chamber that is downstream of the forwardmost end;a shell radially outward of the liner, wherein a cooling cavity is defined by the liner and the shell and an air plenum is radially outward of the shell; anda dilution hole assembly having an outer wall extending about a centerline and contacting the liner and the shell and defining a hole in fluid communication with the air plenum and the combustion chamber, said hole providing cooling dilution air flow radially through the liner and shell into the combustion chamber downstream of the forwardmost end, and a second wall located in the hole about the centerline, wherein an annular outer portion of the hole is defined by and between the outer wall and the second wall, and an inner portion of the hole is defined at least in-part by and inward of the second wall with respect to the centerline;wherein the dilution hole assembly has a plurality of inner vanes in the inner portion and spaced circumferentially from one-another with respect to the centerline for swirling at least a portion of air flowing through the inner portion. 12. The combustor set forth in claim 11, wherein the outer wall isolates the cooling cavity from the hole. 13. The combustor set forth in claim 11, wherein the dilution hole assembly further has a plurality of outer vanes in the annular outer portion and spaced circumferentially from one-another with respect to the centerline of the hole for swirling air flowing through the annular outer portion, and the inner vanes in the inner portion are adapted for swirling the at least a portion of air flowing through the inner portion in a counter direction from the air flowing through the annular outer portion. 14. The combustor set forth in claim 13, wherein the dilution hole assembly has an inner wall located radially inward of the second wall with respect to the centerline, each of the inner vanes extends between and is connected to the second wall and the inner wall, and the inner portion is an annular inner portion. 15. The combustor set forth in claim 14, wherein the inner wall defines a jet stream portion of the hole located radially inward of the annular inner portion with respect to the centerline. 16. A combustor comprising: a forwardmost end that includes a fuel nozzle;a liner disposed about an axis and defining a combustion chamber that is downstream of the forwardmost end;a shell radially outward of the liner, wherein a cooling cavity is defined by the liner and the shell and an air plenum is radially outward of the shell; anda dilution hole assembly having an outer wall extending about a centerline and contacting the liner and the shell and defining a hole in fluid communication with the air plenum and the combustion chamber, said hole providing cooling dilution air flow radially through the liner and shell into the combustion chamber downstream of the forwardmost end, and a second wall located in the hole, wherein an annular outer portion of the hole is defined by and between the outer wall and the second wall and an inner portion of the hole is defined at least in-part by and inward of the second wall with respect to the centerline;wherein the second wall has an inner face defining at least in-part the inner portion, and the inner face is sloped radially outward with respect to the centerline and in the direction of air flow from the air plenum and into the combustion chamber as the inner face extends axially along the centerline between opposing ends of the second wall; andwherein the dilution hole assembly has a plurality of inner vanes in the inner portion and spaced circumferentially from one-another with respect to the centerline of the hole for swirling at least a portion of air flowing through the inner portion. 17. The combustor set forth in claim 16, wherein the dilution hole assembly has a plurality of outer vanes in the annular outer portion and spaced circumferentially from one-another with respect to the centerline of the hole for swirling air flow through the annular outer portion. 18. The combustor of claim 16, wherein a cross-sectional area of the inner portion increases as the inner portion extends, in the direction of air flow from the air plenum and into the combustion chamber, between the opposing ends of the second wall. 19. The combustor of claim 18, wherein a cross-sectional area of the annular outer portion decreases as the annular outer portion extends, in the direction of air flow from the air plenum and into the combustion chamber, between the opposing ends of the second wall.
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이 특허에 인용된 특허 (13)
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