US3899884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustor systems
Assignee: General Electric Co
•
Filing: 1970-12-02
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Granted: 1975-08-19
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Expires: 1990-12-02
Abstract
Abstract The disclosure shows two versions of providing a venturi around a fuel spray cone in a mixing chamber having an axial, vortical flow of pressurized air therethrough. This mixture is discharged into a combustion chamber. The venturi maintains desirable low smoke formation while spacing the flame front of the ignited mixture from the spray nozzle to reduce its temperature and thus prevent undesired carbon formation thereon.
Inventors
- 👤 Edward E Ekstedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:37
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/02; F23R3/04; F23R3/10; F23R3/12; F23R3/14; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
204 words
A combustor system comprising: a combustion chamber, a mixing chamber opening into the upstream end of the combustion chamber, a spray nozzle for discharging fuel as an atomized cone into said mixing chamber, the axis of said spray cone extending lengthwise of said mixing chamber toward said combustion chamber, means for introducing pressurized air into the upstream end of said mixing chamber and producing an axial flow field for dispersing the fuel in fine droplets, venturi means surrounding said spray cone and through which at least a portion of the axially flowing air passes, and wherein the air introducing means additionally provide a vortical component to the air flow field, the venturi means comprise a venturi tube mounted within said mixing chamber, a cylindrical conduit and an axial swirler at the upstream end of the conduit define said mixing chamber, said air introducing means includes an annular row of generally radially oriented passageways angled through said swirler, said axial swirler has a central opening through which the discharge end of the spray nozzle projects, and the inlet end of the venturi tube has a diameter intermediate the minimum and maximum diameters of the annular row of swirler passageways and is bonded to said swirler.
Claim 2
Dependent Claim
204 words
A combustor system comprising: a combustion chamber, a mixing chamber opening into the upstream end of the combustion chamber, a spray nozzle for discharging fuel as an atomized cone into said mixing chamber, the axis of said spray cone extending lengthwise of said mixing chamber toward said combustion chamber, means for introducing pressurized air into the upstream end of said mixing chamber and producing an axial flow field for dispersing the fuel in fine droplets, venturi means surrounding said spray cone and through which at least a portion of the axially flowing air passes, and wherein the air introducing means additionally provide a vortical component to the air flow field, the venturi means comprise a venturi tube mounted within said mixing chamber, a cylindrical conduit and an axial swirler at the upstream end of the conduit define said mixing chamber, said air introducing means includes an annular row of generally radially oriented passageways angled through said swirler, said axial swirler has a central opening through which the discharge end of the spray nozzle projects, and the inlet end of the venturi tube has a diameter intermediate the minimum and maximum diameters of the annular row of swirler passageways and is bonded to said swirler.
Claim 3
Dependent Claim
29 words
A combustion chamber as in claim 1 wherein the divergent discharge end of the venturi tube terminates generally as a tangent to the spray cone discharge from the nozzle.
Claim 4
Dependent Claim
69 words
A combustor as in claim 2 wherein: a pressurized plenum is provided, in combination with the upstream face of said axial swirler, and the swirler passageways meter air into the mixing chamber at a rate insufficient to produce a combustible mixture with the fuel introduced by said spray nozzle, and means are provided for introducing further pressurized air into said combustion chamber sufficient to produce a combustible mixture therein.
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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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |