US3668869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel spray ignition atomizer nozzle
Assignee: Westinghouse Electric Corp
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Filing: 1971-01-28
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Granted: 1972-06-13
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Expires: 1991-01-28
Abstract
Abstract A liquid fuel spray atomizer nozzle for use with a gas turbine during combustion chamber fuel ignition, comprising a member having a high pressure air blast passageway for directing a stream of air, angularly in relation to the direction of fuel spray from a nozzle into the combustion chamber, so as to atomize and forcibly blow at least a part of the fuel toward an ignition device into ignition proximity therewith. The air blast can be blown directly across the fuel spray pattern or may be directed toward a side of the spray pattern. In all cases, the air must be under sufficient pressure to deflect and atomize the fuel spray sufficiently to provide for its ignition by the spark gap or other igniter.
Inventors
- 👤 Serafino M De Corso
- 👤 Chester A Jersey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:20
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/28
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
109 words
Combustion apparatus for a gas turbine, comprising a combustion chamber, a liquid fuel spray atomizer nozzle for atomizing liquid fuel sprayed into said combustion chamber, said spray nozzle having a body defining a spraying orifice, said body having fuel passage means for directing the liquid fuel through said orifice in a substantially hollow conical spray pattern at atmospheric pressure, a fuel ignition device, and means for providing an air blast directed at said fuel spray pattern from only one side thereof for atomizing at least a part of the liquid fuel forming said spray pattern and directing at least a part thereof into igniting proximity with said ignition device.
Claim 2
Dependent Claim
109 words
Combustion apparatus for a gas turbine, comprising a combustion chamber, a liquid fuel spray atomizer nozzle for atomizing liquid fuel sprayed into said combustion chamber, said spray nozzle having a body defining a spraying orifice, said body having fuel passage means for directing the liquid fuel through said orifice in a substantially hollow conical spray pattern at atmospheric pressure, a fuel ignition device, and means for providing an air blast directed at said fuel spray pattern from only one side thereof for atomizing at least a part of the liquid fuel forming said spray pattern and directing at least a part thereof into igniting proximity with said ignition device.
Claim 3
Dependent Claim
19 words
Combustion apparatus as defined in claim 1 wherein said air blast means includes means for controlling the operation thereof.
Claim 4
Dependent Claim
35 words
Combustion apparatus as defined in claim 2 wherein said controlling means is operative to render said air blast means operative during starting ignition of fuel in the combustion chamber and for rendering it otherwise inoperative.
Claim 5
Dependent Claim
67 words
Combustion apparatus as defined in claim 1 wherein said air blast means comprises a member having therein an air passageway with a blast orifice and constructed and arranged to direct an air blast to engage at least a part of said fuel spray pattern and to atomize the same and deflect at least a part of the atomized spray toward said ignition device into igniting proximity therewith.
Claim 6
Dependent Claim
34 words
Combustion apparatus as defined in claim 4 wherein said air blast passageway is constructed and arranged to direct an air blast directly at and across the conical fuel spray pattern toward said ignition device.
Claim 7
Dependent Claim
42 words
Combustion apparatus as defined in claim 4 wherein said air blast passageway orifice is closely adjacent to said spray nozzle orifice and said passageway is arranged to direct the air blast angularly in the general fuel spray direction and across the same.
Claim 8
Dependent Claim
56 words
Combustion apparatus as defined in claim 4 wherein said air blast passageway is constructed and arranged to direct an air blast angularly in the general fuel spray direction and so as to engage a side of said conical spray pattern and atomize and deflect at least part of the atomized fuel spray toward said ignition device.
Claim 9
Dependent Claim
49 words
Combustion apparatus as defined in claim 4 wherein the air blast passageway has an inpuT throat and a diverging mouth of larger cross-sectional flow area than said throat forming said blast orifice and providing for rapid expansion of air at the orifice and a spreading of the air blast.
Claim 10
Dependent Claim
34 words
Combustion apparatus as defined in claim 4 including means for supplying air to said air blast means at a pressure to provide substantially sonic air velocity at the input to said air blast passageway.
Claim 11
Dependent Claim
66 words
Combustion apparatus as defined in claim 9 wherein the air blast passageway has an input throat and a diverging mouth forming said air blast orifice, said diverging mouth being formed to provide a critical air pressure drop therethrough with a change in air pressure to about 0.53 of the air pressure in the input throat and a resultant supersonic air velocity at the air blast orifice.
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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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |