US3633361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burners for reheat combustion chambers
Assignee: Safran Aircraft Engines SAS
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Filing: 1969-09-29
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Granted: 1972-01-11
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Expires: 1989-09-29
Abstract
Abstract A burner for the reheat chamber of a dual-flow gas turbine jet engine, comprising a fuel-prevaporizing device having a feedpipe fed jointly from a liquid fuel source and a secondary air duct and having a discharge pipe opening into the reheat chamber to discharge thereinto a mixture of air from the secondary duct and of fuel preheated by heat exchange with a primary flow of hot gases from the turbine.
Inventors
- 👤 Louis Jules Bauger
- 👤 Armand Jean-Baptiste Lacroix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:25
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/28; F23R3/30; F23R3/32
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
174 words
In a dual-flow gas turbine powerplant having a source of liquid fuel, a gas turbine type hot gas generator, a reheat chamber for passing a flow of hot gases from said generator, and a separate duct for supplying a flow of air, an improved burner for the reheat chamber in the form of a fuel-prevaporizing device comprising: a feedpipe for said device; means for communicating said feedpipe with said source of liquid fuel; means for also communicating said feedpipe with said air duct; discharge passages for said device opening into the reheat chamber, to discharge thereto during operation a mixture of the air taken from said air duct and of fuel prevaporized by heat exchange with the hot gases from said hot gas generator; and at least one profiled ring of generally gutterlike crosssectioNal shape open in the downstream direction with respect to the general direction of flow of gases through the reheat chamber, said profiled ring supporting the prevaporizing device and having orifices in its leading edge adapted to receive the discharge passages.
Claim 2
Dependent Claim
174 words
In a dual-flow gas turbine powerplant having a source of liquid fuel, a gas turbine type hot gas generator, a reheat chamber for passing a flow of hot gases from said generator, and a separate duct for supplying a flow of air, an improved burner for the reheat chamber in the form of a fuel-prevaporizing device comprising: a feedpipe for said device; means for communicating said feedpipe with said source of liquid fuel; means for also communicating said feedpipe with said air duct; discharge passages for said device opening into the reheat chamber, to discharge thereto during operation a mixture of the air taken from said air duct and of fuel prevaporized by heat exchange with the hot gases from said hot gas generator; and at least one profiled ring of generally gutterlike crosssectioNal shape open in the downstream direction with respect to the general direction of flow of gases through the reheat chamber, said profiled ring supporting the prevaporizing device and having orifices in its leading edge adapted to receive the discharge passages.
Claim 3
Dependent Claim
20 words
A reheat burner as claimed in claim 1, wherein said ring is formed with supplementary openings in its leading edge.
Claim 4
Dependent Claim
25 words
A reheat burner as claimed in claim 1, wherein the prevaporizing device cooperates with at least one fuel injector located upstream of the burner ring.
Claim 5
Dependent Claim
45 words
A reheat burner as claimed in claim 1, wherein the prevaporizing device is located, at least for the most part, inside said ring, said ring having in its leading edge a supplementary opening adapted to receive the feedpipe which forms part of the prevaporizing device.
Claim 6
Dependent Claim
71 words
A reheat burner as claimed in claim 1, wherein the prevaporizing device is supported substantially symmetrically by an arrangement of two profiled rings located coaxially and connected together by substantially radial intercommunicating stays, said stays likewise having a generally gutter shape open in the downstream direction, and also having openings in their respective leading edges, which are adapted to receive in star arrangement discharge passages forming part of the prevaporizing device.
Claim 7
Dependent Claim
43 words
A reheat burner as claimed in claim 1, wherein the prevaporizing device is supported in substantially symmetrical fashion by an arrangement of two rings, and a distributor pipe linking the feedpipe to the discharge pipes extends through the space defined between said rings.
References Cited (Backward Citations)
US2672727A
Cited
US2931174A
Cited
US2979899A
Cited
US2978868A
Cited
US3151453A
Cited
US3236048A
Cited
US3330117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |