A resonance chamber (42) has an outer wall (32) with coolant inlet holes (34A-C), an inner wall (36) with acoustic holes (38), and side walls (40A-C) between the inner and outer walls. A depression (33A-C) in the outer wall has a bottom portion (50) that is close to the inner wall compared to peaks
A resonance chamber (42) has an outer wall (32) with coolant inlet holes (34A-C), an inner wall (36) with acoustic holes (38), and side walls (40A-C) between the inner and outer walls. A depression (33A-C) in the outer wall has a bottom portion (50) that is close to the inner wall compared to peaks (37A-C) of the outer wall. The coolant inlet holes may be positioned along the bottom portion of the depression and along a bottom portion of the side walls to direct coolant flows (44, 51) toward impingement locations (43) on the inner wall that are out of alignment with the acoustic holes. This improves impingement cooling efficiency. The peaks (37A-C) of the outer wall provide volume in the resonance chamber for a target resonance.
대표청구항▼
1. A damping resonator comprising: a resonance chamber formed by an outer wall with coolant inlet holes, an inner wall with acoustic holes, and side walls spanning between the inner and outer walls;a depression in the outer wall comprising a bottom portion that is closer to the inner wall than is a
1. A damping resonator comprising: a resonance chamber formed by an outer wall with coolant inlet holes, an inner wall with acoustic holes, and side walls spanning between the inner and outer walls;a depression in the outer wall comprising a bottom portion that is closer to the inner wall than is a first peak portion of the outer wall;the coolant inlet holes distributed along the bottom portion of the depression;wherein the coolant inlet holes are close enough to the inner wall for effective impingement cooling thereof, and are located to direct coolant flows toward impingement locations on the inner wall apart from the acoustic holes;wherein the first peak portion of the outer wall is disposed at a first distance from the inner wall, and the bottom portion of the depression is disposed at a second distance from the inner wall that is less than 60% of the first distance. 2. A damping resonator as in claim 1, wherein at least some of the coolant inlet holes are positioned in a fillet area of the bottom portion of the depression. 3. A damping resonator as in claim 2, wherein others of the coolant inlet holes are positioned in a central area of the bottom portion of the depression. 4. A damping resonator as in claim 3, wherein the bottom portion of the depression is less than 40% as far from the inner wall as the first peak portion of the outer wall, and further comprising additional coolant inlet holes in the side walls. 5. A damping resonator as in claim 3, wherein the depression forms a trough in the outer wall. 6. A damping resonator as in claim 1, wherein the depression is cross-shaped, and the outer wall comprises four peaks. 7. A damping resonator as in claim 1, wherein the depression is bowl-shaped. 8. A damping resonator as in claim 1, wherein the inner wall is formed by a portion of a gas turbine combustor liner or a gas turbine transition duct; the bottom portion of the depression is less than 40% as far from the inner wall as the first peak portion of the outer wall; and further comprising a second peak portion of the outer wall with a different height than the first peak portion of the outer wall. 9. A damping resonator comprising: an inner wall with acoustic holes, wherein the inner wall is formed by a wall of a gas turbine component that bounds a working gas flow of the gas turbine;an outer wall comprising a peak portion at a first distance from the inner wall;side walls spanning between the inner and outer walls, forming a resonance chamber therebetween;a depression in the outer wall comprising a bottom portion at a second distance from the inner wall that is less than 60% of the first distance;coolant inlet holes distributed along the bottom portion of the depression located to direct respective coolant flows toward respective impingement locations on the inner wall apart from the acoustic holes. 10. A damping resonator as in claim 9, wherein at least some of the coolant inlet holes are positioned in a fillet area of the bottom portion of the depression. 11. A damping resonator as in claim 10, wherein others of the coolant inlet holes are positioned in a central area of the bottom portion of the depression. 12. A damping resonator as in claim 11, wherein the bottom portion of the depression is less than 40% as far from the inner wall as the first peak portion of the outer wall, and further comprising additional coolant inlet holes in the side walls. 13. A damping resonator as in claim 12, wherein the depression forms a trough in the outer wall. 14. A damping resonator as in claim 9, wherein the depression is cross-shaped, and the outer wall comprises four peaks. 15. A damping resonator as in claim 9, wherein the depression is bowl-shaped. 16. A damping resonator as in claim 9, wherein the inner wall is formed by a portion of a gas turbine combustor liner, and the bottom portion of the depression is less than 40% as far from the inner wall as the peak portion of the outer wall. 17. A damping resonator for a gas turbine component, comprising: an outer wall comprising a plurality of peak portions;an inner wall with acoustic holes;side walls between the inner and outer walls forming a resonance chamber;a depression in the outer wall, the depression comprising a bottom portion disposed at a second distance from the inner wall that is less than 40% of a first distance of from the inner wall of at least one of the peak portions on the outer wall; andcoolant inlet holes positioned along the bottom portion of the depression to direct coolant flows toward impingement locations on the inner wall apart from the acoustic holes. 18. A damping resonator as in claim 17, wherein some of the coolant inlet holes are positioned in fillet areas of the bottom portion of the depression. 19. A damping resonator as in claim 18, wherein others of the coolant inlet holes are positioned centrally in the bottom portion of the depression. 20. A damping resonator as in claim 17, further comprising additional coolant inlet holes in the side walls, wherein the peaks in the outer wall are of at least two different heights, providing at least two respective tuning frequencies.
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이 특허에 인용된 특허 (16)
Pandalai Raghavan P. (Cincinnati OH) Carter Bruce A. (West Chester OH) Hehmann Horst W. W. (Cincinnati OH), Acoustic damper for a gas turbine engine combustor.
Aigner Manfred (Wettingen CHX) Urech Raphael (Hallwil CHX) Wetter Hugo (Buchs CHX), Gas turbine combustion chamber with scavenged Helmholtz resonators.
Cowan Samuel J. (Seattle WA) Gerend Robert P. (Bellevue WA) Ramsay James W. (Bellevue WA) Shivashankara Belur N. (Renton WA), Gas turbine engine combustion noise suppressor.
Sattinger, Stanley S.; Darling, Douglas Dean; Holbert, Roy Kyle; Kepes, William E., Modular resonators for suppressing combustion instabilities in gas turbine power plants.
Bagepalli Bharat Sampathkumaran ; Corman Gregory Scot ; Dean Anthony John ; DiMascio Paul Stephen ; Mirdamadi Massoud, Turbine assembly containing an inner shroud.
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