US4199935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion apparatus
Assignee: UK Secretary of State for Defence
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Filing: 1975-11-28
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Granted: 1980-04-29
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Expires: 1995-11-28
Abstract
Abstract A gas turbine combustor which may be of cylindrical or annular configuration has a concave inner surface at its upstream end, and means for directing combustion air along the concave surface towards the middle thereof so as to form a stable vortex pattern near the concave surface, the vortical flow being in an upstream direction in the region of the periphery of the concave surface. A fuel injector for directing fuel droplets into combustion air flowing over the surface may be located at the middle of the concave surface.
Inventors
- 👤 John P. D. Hakluytt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:47
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/02; F23R3/04; F23R3/10; F23R3/12; F23R3/14; F23R3/42; F23R3/54; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
121 words
Combustion apparatus for the combustion of fuel in an airstream which comprises a combustion chamber having a concave inner surface at the upstream end thereof, means associated with said concave surface for directing combustion air over the entire periphery of said surface towards the middle of the surface so as to form a stable vortex pattern near said surface, and means for injecting fuel from the middle of the surface into the air flowing in generally the opposite direction thereto along said surface towards the middle thereof, wherein vortical flow within the vortex is in an upstream direction in the region of the periphery of the concave surface and wherein combustion of the fuel takes place substantially within the vortex pattern.
Claim 2
Dependent Claim
121 words
Combustion apparatus for the combustion of fuel in an airstream which comprises a combustion chamber having a concave inner surface at the upstream end thereof, means associated with said concave surface for directing combustion air over the entire periphery of said surface towards the middle of the surface so as to form a stable vortex pattern near said surface, and means for injecting fuel from the middle of the surface into the air flowing in generally the opposite direction thereto along said surface towards the middle thereof, wherein vortical flow within the vortex is in an upstream direction in the region of the periphery of the concave surface and wherein combustion of the fuel takes place substantially within the vortex pattern.
Claim 3
Dependent Claim
14 words
The apparatus of claim 1 in which said chamber has a generally cylindrical configuration.
Claim 4
Dependent Claim
13 words
The apparatus of claim 2 in which said chamber has an annular configuration.
Claim 5
Dependent Claim
31 words
The apparatus of claim 1 wherein said means for directing combustion air along said concave surface also imparts to said air a swirl velocity component about the axis of the chamber.
Claim 6
Dependent Claim
53 words
The apparatus of claim 1 wherein said means for directing combustion air along said concave surface comprises a plurality of vanes, said vanes being circumferentially spaced around the axis of the chamber and inclined with respect to said axis so as to impart to the air a swirl velocity component about said axis.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-29 | 1983-10-29 | 1984-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-29 | 1987-10-29 | 1988-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-29 | 1991-10-29 | 1992-04-29 | $7700.00 | Window Closed / Lapsed |