US3744242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recirculating combustor
Assignee: Motors Liquidation Co
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Filing: 1972-01-25
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Granted: 1973-07-10
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Expires: 1992-01-25
Abstract
Abstract Combustor structure particularly adapted for supplying motive fluid to a gas turbine engine or the like. A combustion liner is mounted within an inner casing, the two defining between them a recirculation duct for combustion products. The inner casing is mounted within an outer casing, these two defining between them a dilution air duct in which the dilution air is heated while cooling the recirculating combustion products. The combustion liner wall is double and defines combustion air duct between the walls with a Coanda nozzle at its downstream end which is the nozzle of a jet pump to effect the recirculation. The combustion liner is supported from the forward wall of the casing by tubes which conduct combustion air into the liner. A valve arrangement controls the ratio of combustion air to dilution air.
Inventors
- 👤 R Stettler
- 👤 A Verdouw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:15
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/02; F23C; F23C9/00; F23C9/006; F23R3/005; F23R3/16; F23R3/26; F05; F05B; F05B2250/00; F05B2250/40; F05B2250/41; F05B2250/411; F23C2202/00; F23C2202/30; F23C2202/50
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
269 words
Combustion apparatus having an upstream end and a downstream end comprising, in combination, an outer casing defining inlet means for dilution air adjacent the upstream end; an inner casing mounted within the outer casing and defining an outlet at its downstream end for combustion products; the casings defining between them a duct for dilution air extending from the said inlet means past the said outlet; a combustion liner mounted within the inner casing having an upstream inlet end adjacent the upstream end of the inner casing and a downstream outlet end upstream from the said combustion products outlet; the inner casing and the combustion liner defining between them a recirculation duct for combustion products extending from the downstream end of the liner to the upstream end of the liner; the combustion liner having a double wall defining within the wall a combustion air duct extending from the upstream to the downstream end of the liner; the combustion air duct having air inlet means at the upstream end and terminating in an annular jet pump nozzle at the downstream end adapted to discharge the combustion air over the outer wall of the combustion liner into the recirculation duct and to entrain and energize a substantial portion of the combustion products flowing from the downstream end of the liner through the recirculation duct into the upstream end of the liner; the combustion liner defining a combustion zone therein; means for injecting fuel into the combustion zone; and means downstream of the said outlet for mixing dilution air flowing from the dilution air duct with combustion products flowing from the inner casing.
Claim 2
Dependent Claim
269 words
Combustion apparatus having an upstream end and a downstream end comprising, in combination, an outer casing defining inlet means for dilution air adjacent the upstream end; an inner casing mounted within the outer casing and defining an outlet at its downstream end for combustion products; the casings defining between them a duct for dilution air extending from the said inlet means past the said outlet; a combustion liner mounted within the inner casing having an upstream inlet end adjacent the upstream end of the inner casing and a downstream outlet end upstream from the said combustion products outlet; the inner casing and the combustion liner defining between them a recirculation duct for combustion products extending from the downstream end of the liner to the upstream end of the liner; the combustion liner having a double wall defining within the wall a combustion air duct extending from the upstream to the downstream end of the liner; the combustion air duct having air inlet means at the upstream end and terminating in an annular jet pump nozzle at the downstream end adapted to discharge the combustion air over the outer wall of the combustion liner into the recirculation duct and to entrain and energize a substantial portion of the combustion products flowing from the downstream end of the liner through the recirculation duct into the upstream end of the liner; the combustion liner defining a combustion zone therein; means for injecting fuel into the combustion zone; and means downstream of the said outlet for mixing dilution air flowing from the dilution air duct with combustion products flowing from the inner casing.
Claim 3
Dependent Claim
287 words
Combustion apparatus having an upstream end and a downstream end comprising, in combination, an outer casing defining inlet means for dilution air adjacent the upstream end; an inner casing mounted within the outer casing and defining an outlet at its downstream end for combustion products; the casings defining between them a duct for dilution air extending from the said inlet means past the said outlet; a combustion liner mounted within the inner casing having an upstream inlet end adjacent the upstream end of the inner casing and a downstream outlet end upstream from the said combustion products outlet; the inner casing and the combustion liner defining between them a recirculation duct for combustion products extending from the downstream end of the liner to the upstream end of the liner; the inner casing having a configuration promoting heat transfer between the recirculation duct and the dilution air duct; the combustion liner having a double wall defining within the wall a combustion air duct extending from the upstream to the downstream end of the liner; the combustion air duct having air inlet means at the upstream end and terminating in an annular jet pump nozzle at the downstream end adapted to discharge the combustion air over the outer wall of the combustion liner into the recirculation duct and to entrain and energize a substantial portion of the combustion products flowing from the downstream end of the liner through the recirculation duct into the upstream end of the liner; the combustion liner defining a combustion zone therein; means for injecting fuel into the combustion zone; and means downstream of the said outlet for mixing dilution air flowing from the dilution air duct with combustion products flowing from the inner casing.
Claim 4
Dependent Claim
287 words
Combustion apparatus having an upstream end and a downstream end comprising, in combination, an outer casing defining inlet means for dilution air adjacent the upstream end; an inner casing mounted within the outer casing and defining an outlet at its downstream end for combustion products; the casings defining between them a duct for dilution air extending from the said inlet means past the said outlet; a combustion liner mounted within the inner casing having an upstream inlet end adjacent the upstream end of the inner casing and a downstream outlet end upstream from the said combustion products outlet; the inner casing and the combustion liner defining between them a recirculation duct for combustion products extending from the downstream end of the liner to the upstream end of the liner; the inner casing having a configuration promoting heat transfer between the recirculation duct and the dilution air duct; the combustion liner having a double wall defining within the wall a combustion air duct extending from the upstream to the downstream end of the liner; the combustion air duct having air inlet means at the upstream end and terminating in an annular jet pump nozzle at the downstream end adapted to discharge the combustion air over the outer wall of the combustion liner into the recirculation duct and to entrain and energize a substantial portion of the combustion products flowing from the downstream end of the liner through the recirculation duct into the upstream end of the liner; the combustion liner defining a combustion zone therein; means for injecting fuel into the combustion zone; and means downstream of the said outlet for mixing dilution air flowing from the dilution air duct with combustion products flowing from the inner casing.
Claim 5
Dependent Claim
282 words
Combustion apparatus having an upstream end and a downstream end comprising, in combination, an outer casing defining inlet means for dilution air adjacent the upstream end; an inner casing mounted within the outer casing and defining an outlet at its downstream end for combustion products; the casings defining between them a duct for dilution air extending from the said inlet means past the said outlet; a combustion liner mounted within the inner casing having an upstream inlet end downstream of the upstream end of the inner casing and a downstream outlet end upstream from the said combustion products outlet; the inner casing and the combustion liner defining between them a recirculation duct for combustion products extending from the downstream end of the liner to the upstream end of the liner; the combustion liner having a double wall defining within the wall a combustion air duct extending from the upstream to the downstream end of the liner; the combustion air duct having air inlet means at the upstream end and terminating in an annular jet pump nozzle at the downstream end adapted to discharge the combustion air over the outer wall of the combustion liner into the recirculation duct and to entrain and energize a substantial portion of the combustion products flowing from the downstream end of the liner through the recirculation duct into the upstream end of the liner; the combustion liner defining a combustion zone therein; means for injecting fuel into the combustion zone; means downstream of the said outlet for mixing dilution air flowing from the dilution air duct with combustion products flowing from the inner casing; and variable means for controlling the ratio of combustion air to dilution air.
Claim 6
Dependent Claim
282 words
Combustion apparatus having an upstream end and a downstream end comprising, in combination, an outer casing defining inlet means for dilution air adjacent the upstream end; an inner casing mounted within the outer casing and defining an outlet at its downstream end for combustion products; the casings defining between them a duct for dilution air extending from the said inlet means past the said outlet; a combustion liner mounted within the inner casing having an upstream inlet end downstream of the upstream end of the inner casing and a downstream outlet end upstream from the said combustion products outlet; the inner casing and the combustion liner defining between them a recirculation duct for combustion products extending from the downstream end of the liner to the upstream end of the liner; the combustion liner having a double wall defining within the wall a combustion air duct extending from the upstream to the downstream end of the liner; the combustion air duct having air inlet means at the upstream end and terminating in an annular jet pump nozzle at the downstream end adapted to discharge the combustion air over the outer wall of the combustion liner into the recirculation duct and to entrain and energize a substantial portion of the combustion products flowing from the downstream end of the liner through the recirculation duct into the upstream end of the liner; the combustion liner defining a combustion zone therein; means for injecting fuel into the combustion zone; means downstream of the said outlet for mixing dilution air flowing from the dilution air duct with combustion products flowing from the inner casing; and variable means for controlling the ratio of combustion air to dilution air.
Claim 7
Dependent Claim
314 words
Combustion apparatus having an upstream end and a downstream end comprising, in combination, an outer casing defining a first inlet means for dilution air adjacent the upstream end and defining second inlet means for dilution air intermediate the ends; an inner casing mounted within the outer casing and defining an outlet at its downstream end for combustion products; the casings defining between them a duct for dilution air extending from the upstream end of the casings past the said outlet; a combustion liner mounted within the inner casing having an upstream inlet end adjacent the upstream end of the inner casing and a downstream outlet end upstream from the said combustion products outlet; the inner casing and the combustion liner defining between them a recirculation duct for combustion products extending from the downstream end of the liner to the uPstream end of the liner; the inner casing having a configuration promoting heat transfer between the recirculation duct and the silution air duct; the combustion liner having a double wall defining within the wall a combustion air duct extending from the upstream to the downstream end of the liner; the combustion air duct having air inlet means at the upstream end and terminating in an annular jet pump nozzle at the downstream end adapted to discharge the combustion air over the outer wall of the combustion liner into the recirculation duct and to entrain and energize a substantial portion of the combustion products flowing from the downstream end of the liner through the recirculation duct into the upstream end of the liner; the combustion liner defining a combustion zone therein; means for injecting fuel into the combustion zone; means downstream of the said outlet for mixing dilution air flowing from the dilution air duct with combustion products flowing from the inner casing; and variable means for controlling the ratio of combustion air to dilution air.
Claim 8
Dependent Claim
314 words
Combustion apparatus having an upstream end and a downstream end comprising, in combination, an outer casing defining a first inlet means for dilution air adjacent the upstream end and defining second inlet means for dilution air intermediate the ends; an inner casing mounted within the outer casing and defining an outlet at its downstream end for combustion products; the casings defining between them a duct for dilution air extending from the upstream end of the casings past the said outlet; a combustion liner mounted within the inner casing having an upstream inlet end adjacent the upstream end of the inner casing and a downstream outlet end upstream from the said combustion products outlet; the inner casing and the combustion liner defining between them a recirculation duct for combustion products extending from the downstream end of the liner to the uPstream end of the liner; the inner casing having a configuration promoting heat transfer between the recirculation duct and the silution air duct; the combustion liner having a double wall defining within the wall a combustion air duct extending from the upstream to the downstream end of the liner; the combustion air duct having air inlet means at the upstream end and terminating in an annular jet pump nozzle at the downstream end adapted to discharge the combustion air over the outer wall of the combustion liner into the recirculation duct and to entrain and energize a substantial portion of the combustion products flowing from the downstream end of the liner through the recirculation duct into the upstream end of the liner; the combustion liner defining a combustion zone therein; means for injecting fuel into the combustion zone; means downstream of the said outlet for mixing dilution air flowing from the dilution air duct with combustion products flowing from the inner casing; and variable means for controlling the ratio of combustion air to dilution air.
Claim 9
Dependent Claim
316 words
Combustion apparatus having an upstream end and a downstream end comprising, in combination, an outer casing defining a first inlet means for dilution air adjacent the upstream end and defining second inlet means for dilution air intermediate the ends; and inner casing mounted within the outer casing and defining an outlet at its downstream end for combustion products; the casings defining between them a duct for dilution air extending from the upstream end of the casings past the said outlet; a combustion liner mounted within the inner casing having an upstream inlet end adjacent the upstream end of the inner casing and a downstream outlet end upstream from the said combustion products outlet; the inner casing and the combustion liner defining between them a recirculation duct for combustion products extending from the downstream end of the liner to the upstream end of the liner; the inner casing having a configuration promoting heat transfer between the recirculation duct and the dilution air duct; the combustion liner having a double wall defining within the wall a combustion air duct extending from the upstream to the downstream end of the liner; the combustion air duct having air inlet means at the upstream end and terminating in an annular jet pump nozzle at the downstream end adapted to discharge the combustion air over the outer wall of the combustion liner into the recirculation duct and to entrain and energize a substantial portion of the combustion products flowing from the downstream end of the liner through the recirculation duct into the upstream end of the liner; the combustion liner defining a combustion zone therein; means for injecting fuel into the combustion zone; means downstream of the said outlet for mixing dilution air flowing from the dilution air duct with combustion products flowing from the inner casing; and variable means for controlling the flow of combustion air into the combustion air duct.
Claim 10
Dependent Claim
316 words
Combustion apparatus having an upstream end and a downstream end comprising, in combination, an outer casing defining a first inlet means for dilution air adjacent the upstream end and defining second inlet means for dilution air intermediate the ends; and inner casing mounted within the outer casing and defining an outlet at its downstream end for combustion products; the casings defining between them a duct for dilution air extending from the upstream end of the casings past the said outlet; a combustion liner mounted within the inner casing having an upstream inlet end adjacent the upstream end of the inner casing and a downstream outlet end upstream from the said combustion products outlet; the inner casing and the combustion liner defining between them a recirculation duct for combustion products extending from the downstream end of the liner to the upstream end of the liner; the inner casing having a configuration promoting heat transfer between the recirculation duct and the dilution air duct; the combustion liner having a double wall defining within the wall a combustion air duct extending from the upstream to the downstream end of the liner; the combustion air duct having air inlet means at the upstream end and terminating in an annular jet pump nozzle at the downstream end adapted to discharge the combustion air over the outer wall of the combustion liner into the recirculation duct and to entrain and energize a substantial portion of the combustion products flowing from the downstream end of the liner through the recirculation duct into the upstream end of the liner; the combustion liner defining a combustion zone therein; means for injecting fuel into the combustion zone; means downstream of the said outlet for mixing dilution air flowing from the dilution air duct with combustion products flowing from the inner casing; and variable means for controlling the flow of combustion air into the combustion air duct.
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |