US4214435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for reducing nitrous oxide emissions from a gas turbine engine
Assignee: General Electric Co
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Filing: 1978-10-02
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Granted: 1980-07-29
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Expires: 1998-10-02
Abstract
Abstract A simplified method is provided for turbulently mixing separate flows of fuel and water prior to delivery to the combustor of a gas turbine engine to reduce the temperature to which pressurized air is heated by the combustion of fuel, thereby reducing nitrous oxide emissions in the products of combustion. The method employs no complex homogenization equipment and no emulsifying agents are intentionally added to either the fuel or the water.
Inventors
- 👤 Thomas C. Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:41
CPC Classifications
F; F02; F02C; F02C3/00; F02C3/20; F02C3/30; F02C7/00; F02C7/22; F23; F23K; F23K5/00; F23K5/02; F23K5/08; F23K5/10; F23K5/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
124 words
A simplified method for reducing NO x emissions from a gas turbine engine having a combustor in which a flow of pressurized air is mixed with fuel and combusted comprising the steps of: (a) providing a flow of fuel under pressure; (b) providing a flow of water under pressure; (c) mixing directly, the fuel flow and the water flow in a water:fuel ratio in the range of 0.6 to 1.4 by weight and wherein the conditions are sufficient to produce turbulent mixing with a Reynolds number of at least 1500 in the resulting mixture; and (d) delivering the resulting mixture to a plurality of combustor nozzles for combustion, said combustion occurring within thirty seconds from the time the fuel and water flows are mixed.
Claim 2
Dependent Claim
124 words
A simplified method for reducing NO x emissions from a gas turbine engine having a combustor in which a flow of pressurized air is mixed with fuel and combusted comprising the steps of: (a) providing a flow of fuel under pressure; (b) providing a flow of water under pressure; (c) mixing directly, the fuel flow and the water flow in a water:fuel ratio in the range of 0.6 to 1.4 by weight and wherein the conditions are sufficient to produce turbulent mixing with a Reynolds number of at least 1500 in the resulting mixture; and (d) delivering the resulting mixture to a plurality of combustor nozzles for combustion, said combustion occurring within thirty seconds from the time the fuel and water flows are mixed.
Claim 3
Dependent Claim
29 words
The method as recited in claim 1 wherein when the fuel is Diesel Fuel No. 2, the water:fuel ratio is in the range of 0.7 to 1.0 by weight.
Claim 4
Dependent Claim
26 words
The method as recited in claim 1 wherein when the fuel is JP4, the water:fuel ratio is in the range of 0.6 to 1.4 by weight.
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) | 1983-07-29 | 1984-01-28 | 1984-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-29 | 1988-01-28 | 1988-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-29 | 1992-01-28 | 1992-07-29 | $7700.00 | Window Closed / Lapsed |