Patent US2354746A successfully refreshed from Google Patents.
Patent US3675419A successfully refreshed from Google Patents.
US3675419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chamber having swirling flow
Assignee: RTX Corp
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Filing: 1970-10-26
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Granted: 1972-07-11
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Expires: 1990-10-26
Abstract
Abstract A combustion chamber is arranged so that swirling flow is formed therein to improve the manner and rate of burning above that which is normally obtainable. Swirl inducing means are provided at the entrance to the burner and flameholding means are provided around the outer circumference of the burner. Fuel is injected rearwardly of the swirl inducing means.
Inventors
- 👤 George D Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:07
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/02; F23R3/16
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
99 words
A combustion chamber having an outer wall and means for directing air into said combustion chamber at one end thereof, means for causing the air to rotate around the center line of the combustion chamber at a tangential velocity to produce a large centrifugal acceleration, means for introducing fuel into said air, a flameholder located adjacent the outer wall, said flameholder having an inlet area and a discharge area, said inlet area permitting fuel-air mixture within said flameholder, said discharge area being sized to prevent recirculating flow therein due to the rotating air, means for igniting the fuel-air mixture.
Claim 2
Dependent Claim
99 words
A combustion chamber having an outer wall and means for directing air into said combustion chamber at one end thereof, means for causing the air to rotate around the center line of the combustion chamber at a tangential velocity to produce a large centrifugal acceleration, means for introducing fuel into said air, a flameholder located adjacent the outer wall, said flameholder having an inlet area and a discharge area, said inlet area permitting fuel-air mixture within said flameholder, said discharge area being sized to prevent recirculating flow therein due to the rotating air, means for igniting the fuel-air mixture.
Claim 3
Dependent Claim
26 words
A combination as set forth in claim 1 wherein said fuel is introduced by being sprayed into the air after it has obtained its centrifugal acceleration.
Claim 4
Dependent Claim
17 words
A combination as set forth in claim 1 wherein the flameholder comprises a plurality of individual sections.
Claim 5
Dependent Claim
22 words
A combination as set forth in claim 1 wherein said combination chamber has an inner wall thereby forming an annular combustion chamber.
Claim 6
Dependent Claim
51 words
A combination as set forth in claim 1 wherein the flameholder is formed against the outer wall of said combustion chamber by a first plate extending radially inwardly and rearwardly, a second plate extending radially inwardly from said outer wall, said discharge area being formed between said first and second plates.
Claim 7
Dependent Claim
49 words
A combination as set forth in claim 1 wherein the flameholder is formed against the outer wall by chamber means located around said wall, said inlet area being located at the upstream end of said chamber means, and said sized discharge area being located downstream of said inlet area.
Claim 8
Dependent Claim
35 words
A combination as set forth in claim 1 wherein said means for causing the air to rotate includes a plurality of swirl vanes located just upstream of the means for introducing fuel into said air.
Claim 9
Dependent Claim
45 words
A combination as set forth in claim 7 wherein at least some of said vanes have a varying vane swirl angle along the radial span of the vane to rotate the air at a velocity which is different at different radial positions in the chamber.
Claim 10
Dependent Claim
22 words
A combination as set forth in claim 1 wherein said large centrifugal acceleration is at least 3,000 feet per second per second.
References Cited (Backward Citations)
US2736168A
Cited
US2648492A
Cited
US2720750A
Cited
US2832402A
Cited
US2755623A
Cited
US2977760A
Cited
US3034297A
Cited
US3303645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |