US5323614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustor for gas turbine
Assignee: Hitachi Ltd
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Filing: 1993-01-13
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Granted: 1994-06-28
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Expires: 2013-01-13
Abstract
Abstract A premixed combustor for a gas turbine, comprises, a combustion chamber for burning a fuel with an air therein, at least two premixed fuel/air mixture outlets which are juxtaposed with each other, and through each of which a premixed fuel/air mixture flows out into the combustion chamber, and a flow deflection member arranged between the premixed fuel/air mixture outlets, urging the permixed fuel/air mixture from one of the premixed fuel/air mixture outlets to go away from another one of the premixed fuel/air mixture outlets, and terminating in the combustion chamber so that the premixed fuel/air mixture from the one of the premixed fuel/air mixture outlets is permitted to move toward the premixed fuel/air mixture flowing out from the another one of the premixed fuel/air mixture outlets after going away from the another one of the premixed fuel/air mixture outlets.
Inventors
- 👤 Satoshi Tsukahara
- 👤 Hiroshi Inoue
- 👤 Noriyuki Hayashi
- 👤 Kazumi Iwai
- 👤 Tamio Innami
- 👤 Yoji Ishibashi
- 👤 Michio Kuroda
- 👤 Yasuhiko Otawara
- 👤 Hiraku Ikeda
- 👤 Kazuyuki Itoh
- 👤 Shozo Nakamura
- 👤 Hidekazu Fujimura
- 👤 Kazuhito Koyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:19
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/28; F23R3/286; F23R3/34
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
236 words
A premixed combustor for a gas turbine, comprising; a combustion chamber for burning a fuel with an air therein, at least two premixed fuel/air mixture outlets which are juxtaposed with each other, and through each of which a premixed fuel/air mixture flows out into the combustion chamber, and a flow deflection means arranged between the premixed fuel/air mixture outlets in the vicinity of a root portion of a flame kept by one of the premixed fuel/air mixture outlets when the premixed fuel/air mixture from another premixed fuel/air mixture outlet is ignited, urging the premixed fuel/air mixture from the one of the premixed fuel/air mixture outlets to go away from the another one of the premixed fuel/air mixture outlets, and terminating in the combustion chamber to permit the premixed fuel/air mixture form the one of the premixed fuel/air mixture outlets to move toward the premixed fuel/air mixture flowing out from the another one of the premixed fuel/air mixture outlets so that an eddy flow of the premixed fuel/air mixture directed from the one of the premixed fuel/air mixture outlets toward the another one thereof is generated at a terminating end of the flow deflection means and when the ignition from the flame formed by the one of the premixed fuel/air mixture outlets to the premixed fuel/air mixture flowing out form the another one thereof is preformed a flame transition therebetween is kept smooth by the eddy flow.
Claim 2
Dependent Claim
236 words
A premixed combustor for a gas turbine, comprising; a combustion chamber for burning a fuel with an air therein, at least two premixed fuel/air mixture outlets which are juxtaposed with each other, and through each of which a premixed fuel/air mixture flows out into the combustion chamber, and a flow deflection means arranged between the premixed fuel/air mixture outlets in the vicinity of a root portion of a flame kept by one of the premixed fuel/air mixture outlets when the premixed fuel/air mixture from another premixed fuel/air mixture outlet is ignited, urging the premixed fuel/air mixture from the one of the premixed fuel/air mixture outlets to go away from the another one of the premixed fuel/air mixture outlets, and terminating in the combustion chamber to permit the premixed fuel/air mixture form the one of the premixed fuel/air mixture outlets to move toward the premixed fuel/air mixture flowing out from the another one of the premixed fuel/air mixture outlets so that an eddy flow of the premixed fuel/air mixture directed from the one of the premixed fuel/air mixture outlets toward the another one thereof is generated at a terminating end of the flow deflection means and when the ignition from the flame formed by the one of the premixed fuel/air mixture outlets to the premixed fuel/air mixture flowing out form the another one thereof is preformed a flame transition therebetween is kept smooth by the eddy flow.
Claim 3
Dependent Claim
67 words
A premixed combustor according to claim 1, wherein the flow deflection means extends between the premixed fuel/air mixture outlets to partition the combustion chamber into a part for a flame formed by the premixed fuel/air mixture form the one of the premixed fuel/air mixture outlets and another part for another flame formed by the premixed fuel/air mixture from the another one of the premixed fuel/air mixture outlets.
Claim 4
Dependent Claim
63 words
A premixed combustor according to claim 1, wherein an opening flow area for the premixed fuel/air mixture at the one of the premixed fuel/air mixture outlets as defined by said flow deflection means at an upstream end thereof in a flow direction is larger than an opening flow area for the premixed fuel/air mixture at a downstream end of the flow deflection means.
Claim 5
Dependent Claim
33 words
A premixed combustor according to claim 1, wherein a flow of the premixed fuel/air mixture flowing out from the one of the premixed fuel/air mixture outlets is throttled by the flow deflection means.
Claim 6
Dependent Claim
33 words
A premixed combustor according to claim 1, wherein the one of the premixed fuel/air mixture outlets is separated from the another one of the premixed fuel/air mixture outlets by the flow deflection means.
Claim 7
Dependent Claim
28 words
A premixed combustor according to claim 1, wherein the one of the premixed fuel/air mixture outlets is surrounded by the another one of the premixed fuel/air mixture outlets.
Claim 8
Dependent Claim
46 words
A premixed combustor according to claim 1, wherein the one of the premixed fuel/air mixture outlets is surrounded by the another one of the premixed fuel/air mixture outlets, and is arranged at a radially inner side of the another one of the premixed fuel/air mixture outlets.
Claim 9
Dependent Claim
16 words
A premixed combustor according to claim 1, wherein the flow deflection means has an annular shape.
Claim 10
Dependent Claim
17 words
A premixed combustor according to claim 1, wherein the flow deflection means is a recess-type flame holder.
Claim 11
Dependent Claim
33 words
A premixed combustor according to claim 1, wherein the premixed combustor further comprises a diffusion combustion means for igniting the fuel/air mixture flowing out from the one of the premixed fuel/air mixture outlets.
Claim 12
Dependent Claim
39 words
A premixed combustor according to claim 1, wherein the one of the premixed fuel/air mixture outlets is arranged at an upstream side of the another one of the premixed fuel/air mixture outlets in a premixed fuel/air mixture flow direction.
Claim 13
Dependent Claim
21 words
A premixed combustor according to claim 1, wherein the one of the premixed fuel/air mixture outlets has swirl vane means therein.
Claim 14
Dependent Claim
45 words
A premixed combustor according to claim 1, wherein the another one of the premixed fuel/air mixture outlets has vortex flow generating means therein to hold a flame formed by the premixed fuel/air mixture flowing out from the another one of the premixed fuel/air mixture outlets.
Claim 15
Dependent Claim
47 words
A premixed combustor according to claim 1, wherein the another one of the premixed fuel/air mixture outlets has a bluff body type flame holder therein to hold a flame formed by the premixed fuel/air mixture flowing out from the another one of the premixed fuel/air mixture outlets.
Claim 16
Dependent Claim
39 words
A premixed combustor according to claim 1, wherein the premixed combustor further comprises a diffusion combustion means which keeps always a diffusion combustion for igniting the fuel/air mixture flowing out from the one of the premixed fuel/air mixture outlets.
Claim 17
Dependent Claim
53 words
A premixed combustor according to claim 1, wherein the premixed fuel/air mixture from the one of the premixed fuel/air mixture outlets is firstly ignited, and the premixed fuel/air mixture from the another one of the premixed fuel/air mixture outlets is subsequently ignited when an output of the premixed combustor needs to be increased.
Claim 18
Dependent Claim
40 words
A premixed combustor according to claim 1, wherein the one of the premixed fuel/air mixture outlets is arranged at the substantially same position as the another one of the premixed fuel/air mixture outlets in a premixed fuel/air mixture flow direction.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-06-27 | 1997-12-27 | 1998-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-27 | 2001-12-27 | 2002-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-27 | 2005-12-27 | 2006-06-28 | $7700.00 | Window Closed / Lapsed |