EP0718559B1 - Système d'injection d'une chambre de combustion à deux têtes - Google Patents
Système d'injection d'une chambre de combustion à deux têtes Download PDFInfo
- Publication number
- EP0718559B1 EP0718559B1 EP95402625A EP95402625A EP0718559B1 EP 0718559 B1 EP0718559 B1 EP 0718559B1 EP 95402625 A EP95402625 A EP 95402625A EP 95402625 A EP95402625 A EP 95402625A EP 0718559 B1 EP0718559 B1 EP 0718559B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- head
- take
- injectors
- combustion chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000446 fuel Substances 0.000 title claims description 58
- 238000002347 injection Methods 0.000 title 1
- 239000007924 injection Substances 0.000 title 1
- 238000002485 combustion reaction Methods 0.000 claims description 37
- 238000000034 method Methods 0.000 claims description 9
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 235000005911 diet Nutrition 0.000 description 3
- 230000037213 diet Effects 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/34—Feeding into different combustion zones
Definitions
- the present invention relates to the fuel supply of a two-head combustion chamber of a turbojet engine.
- Dual-head combustion chambers solve the pollution problem at high revs, because the so-called take-off head is optimized for full gas mode, and it supplies the combustion chamber with a sufficiently lean air-fuel mixture to reduce the production of smoke and the formation of large quantities of nitrogen oxide.
- pilot head supplies the primary zone of the combustion chamber with a rich air fuel mixture to ensure the flame stability. This richness of the mixture can lead to a production significant smoke at low speeds.
- the take-off head of the head are offset radially with respect to the axis of the turbojet engine, the temperature profile at the inlet of the high pressure turbine is not homogeneous at low speeds.
- FR-A-2 421 342 also describes a two-module injector in which the central module is designed to operate only at high speeds.
- GB-A-2 214 630 and FR-A-2 421 342 do not mention that these two module injectors can equip a take-off head with a chamber with two heads.
- EP-A-527,629 describes a fuel supply system a two-headed annular combustion chamber, including a three-way valve controlling a circuit pilot head supply and first and second separate main supply circuits supplying all two the main head.
- the pilot head alone is powered at low idle speeds then a first and a second main circuit are successively opened during the revving.
- the aim of the present invention is to propose a method supplying fuel to a two-headed combustion chamber which optimizes the operation of this room for all regimes.
- the first fuel circuit is supplied from 20% of the nominal thrust on the ground.
- FIG. 1 there is shown by reference 10, a traditional two-head combustion, supplied with air by a diffuser 11 arranged downstream of a compressor not shown.
- This combustion chamber 10 of annular shape and axis 12, is delimited by an inner wall 13, a outer wall 14 and a chamber bottom 15 connecting the upstream ends of the inner wall 13 and outer wall 14.
- a passage 16 is provided between the downstream ends of walls 13 and 14 for the flow of hot gases to a turbine not shown.
- the chamber 10 is arranged between an inner casing 17 and an outer casing 18.
- casings 17 and 18 are connected to the diffuser 11, and define with walls 13 and 14 annular passages 19 and 20 for the flow of primary air P which feeds the chamber 10 through orifices 21 formed in the walls 13 and 14, and for the flow of an air of cooling of walls 13 and 14.
- the chamber bottom 15 is equipped with a plurality of injectors for takeoff 22 and a plurality of idle injectors 23 radially distant from the take-off injectors 22.
- a separating plate 24, directed towards the passage 16, is mounted on the chamber bottom 15 between the take-off injectors 22 and the idle injectors 23. This plate 24 separates the upstream zone from the chamber 10 in a first primary combustion zone supplied by take-off injectors 22, called “take-off head" 25, and in a second primary combustion zone supplied by the idle injectors 23 and called “pilot head” 26.
- the injectors 22 and 23 are supplied with fuel by separate circuits 27 and 28 and are associated respectively with groups of blades eddies 29 and 30 supplied with air by the diffuser 11, this air being intended for the vaporization of fuel.
- the idle injectors 23 operate from the bottom regimes and the take-off injectors 22 are only supplied above 25% nominal thrust on the ground F00.
- the curve C1 represented in FIG. 2 represents the richness R in the primary zone in the vicinity of the pilot head 26, as a function of the thrust nominal F00 on the ground.
- Curve C2 represents the richness R in the area primary in the vicinity of the take-off head 25, and the curve C3 the richness minimum which corresponds to the lower operating limit.
- the curve C1 presents a marked drop at 25 % of nominal thrust F00, value at which the take-off head is fueled.
- the wealth in the primary zone is greater than 100% of the stoichiometric rate fuel / air, which ensures good flame stability, but results in however a production of smoke.
- the wealth in the primary zone is greater than 0.7 and less than 1.
- the take-off head 25 of the combustion chamber 10 described above is equipped with take-off injectors 40 provided with two separate fuel systems.
- Each take-off injector 40 includes a injector body 41 in which a first fuel circuit 42 is provided intended to supply the take-off head 25 at high revs and a second fuel system 43 intended to supply the take-off head from below diets.
- An axial spin 44 is disposed around the downstream end of the body injector 41. The axial spin 44 is mounted inside a sleeve 45 which extends upstream by a radial flange 46 and downstream by a frustoconical wall 47 flared outwards.
- a radial spin 48 is mounted downstream of the flange radial 46 and upstream of a bowl 49 fixed on the chamber bottom 15.
- the second fuel circuit 43 passes through each of the fins 50 of the axial spin 44 and opens into the annular space 51 delimited by the sleeve 45 and the bowl 49 by orifices 52 formed in the sleeve 45.
- the sleeve 45 and the frusto-conical wall 47 share the take-off head 25 in two modules.
- the axial module is supplied with fuel by the first fuel circuit 42 and in air by the axial spin 44.
- the second module is supplied with fuel by the second fuel circuit 43 and with air by the radial spin 48.
- the passages of tendrils 44 and 48 can be dimensioned to pass more or less air.
- the module receiving the most air can be either the axial module or the second module.
- the idle injectors 23 and the second fuel circuit 43 are fueled together from the low regimes so that the richness of the primary zone is at least equal to 80% of the stoichiometric rate, so ensure flame stability and avoid fumes.
- the distribution of fuel, at low revs, between the second fuel circuit 43 and the idle injectors 23 of the pilot head is such that the second circuit of fuel 43 receives between 40% and 50% of the total flow. From 20% of the nominal thrust on the ground, the two fuel circuits 42 and 43 of the injectors takeoff 40 are fed simultaneously until full gas.
- Figure 3 shows the representative curves C'1 and C'2 of the richness primary zones of a two-head combustion chamber supplied with fuel according to the process described above.
- the riches of the pilot head and take-off head are less than 100% of the rate stoichiometric at low speed. This wealth is close to 1 in the diet corresponding to approximately 20% of the nominal thrust on the ground F00, then decreases around 0.7 to 0.8 around 30% of the nominal ground thrust for then increase regularly until full gas.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Description
Claims (2)
- Procédé pour alimenter en carburant une chambre de combustion (10) à deux têtes d'un turboréacteur, ladite chambre comportant une tête pilote (26) équipée d'une pluralité d'injecteurs de ralenti (23) et une tête de décollage (25) radialement distante de la tête pilote et équipée d'une pluralité d'injecteurs de décollage (22) comprenant un premier circuit de carburant (42), procédé selon lequel on alimente ladite chambre de combustion (10) en carburant par l'intermédiaire des injecteurs de ralenti (23)dès les bas régimes et on alimente en outre ladite chambre de combustion (10) en carburant aux régimes élevés par l'intermédiaire desdits premiers circuits de carburant (42), eton équipe ladite tête de décollage (25) avec des injecteurs de décollage (40)comportant un deuxième circuit de carburant (43) séparé du premier circuit (42) de carburant caractérisé par le fait qu'on alimente ladite chambre de combustion (10) en carburant par l'intermédiaire desdits deuxièmes circuits de carburant (43) dès les plus bas régimes,par le fait qu'on règle la richesse dans la zone primaire de la chambre de combustion (10) aux bas régimes à une valeur au moins égale à 80 % du taux stoechiométrique etpar le fait qu'on règle le débit de carburant fourni par le deuxième circuit de carburant (43) à une valeur comprise entre 40 % et 50 % du débit total Wf de carburant fourni par ledit deuxième circuit de carburant (43) et la tête pilote (26).
- Procédé selon la revendication 1, caractérisé par le fait qu'on alimente le premier circuit de carburant (42) à partir de 20 % de la poussée nominale F00 au sol.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9414013A FR2727192B1 (fr) | 1994-11-23 | 1994-11-23 | Systeme d'injection d'une chambre de combustion a deux tetes |
| FR9414013 | 1994-11-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0718559A1 EP0718559A1 (fr) | 1996-06-26 |
| EP0718559B1 true EP0718559B1 (fr) | 2000-01-05 |
Family
ID=9469056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95402625A Expired - Lifetime EP0718559B1 (fr) | 1994-11-23 | 1995-11-22 | Système d'injection d'une chambre de combustion à deux têtes |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5634328A (fr) |
| EP (1) | EP0718559B1 (fr) |
| DE (1) | DE69514320T2 (fr) |
| FR (1) | FR2727192B1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10032471A1 (de) * | 2000-07-04 | 2002-01-17 | Rolls Royce Deutschland | Verfahren zur Adaption des Betriebszustandes einer gestuften Brennkammer für Gasturbinen |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19545311B4 (de) * | 1995-12-05 | 2006-09-14 | Alstom | Verfahren zur Betrieb einer mit Vormischbrennern bestückten Brennkammer |
| EP0995066B1 (fr) * | 1997-07-17 | 2001-09-26 | Siemens Aktiengesellschaft | Agencement de bruleurs pour une installation de chauffe, notamment une chambre de combustion de turbine a gaz |
| FR2770283B1 (fr) * | 1997-10-29 | 1999-11-19 | Snecma | Chambre de combustion pour turbomachine |
| DE50008726D1 (de) | 1999-08-21 | 2004-12-30 | Rolls Royce Deutschland | Verfahren zur Adaption des Betriebszustandes einer gestuften Brennkammer für Gasturbinen |
| EP1466124B1 (fr) * | 2002-01-14 | 2008-09-03 | ALSTOM Technology Ltd | ENSEMBLE DE BRûLEURS POUR CHAMBRE DE COMBUSTION ANNULAIRE DE TURBINE à GAZ |
| RU2226652C2 (ru) * | 2002-05-28 | 2004-04-10 | Открытое акционерное общество "Авиадвигатель" | Камера сгорания газотурбинного двигателя |
| US7992390B2 (en) * | 2008-09-23 | 2011-08-09 | Pratt & Whitney Canada Corp. | External rigid fuel manifold |
| GB2589886A (en) * | 2019-12-11 | 2021-06-16 | Rolls Royce Plc | Combustion equipment for a gas turbine engine |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1111808B (it) * | 1978-03-28 | 1986-01-13 | Rolls Royce | Perfezionamenti apportati ai dispositivi di combustione di motori a turbina a gas |
| US4292801A (en) * | 1979-07-11 | 1981-10-06 | General Electric Company | Dual stage-dual mode low nox combustor |
| US4499735A (en) * | 1982-03-23 | 1985-02-19 | The United States Of America As Represented By The Secretary Of The Air Force | Segmented zoned fuel injection system for use with a combustor |
| GB2174147B (en) * | 1985-04-25 | 1989-02-01 | Rolls Royce | Improvements in or relating to the operation of gas turbine engine fuel systems |
| US4735052A (en) * | 1985-09-30 | 1988-04-05 | Kabushiki Kaisha Toshiba | Gas turbine apparatus |
| US4854127A (en) * | 1988-01-14 | 1989-08-08 | General Electric Company | Bimodal swirler injector for a gas turbine combustor |
| JPH0772616B2 (ja) * | 1989-05-24 | 1995-08-02 | 株式会社日立製作所 | 燃焼器及びその運転方法 |
| US5257502A (en) * | 1991-08-12 | 1993-11-02 | General Electric Company | Fuel delivery system for dual annular combustor |
| CA2072275A1 (fr) * | 1991-08-12 | 1993-02-13 | Phillip D. Napoli | Systeme d'alimentation en carburant pour double chambre annulaire de combustion |
| JP3037804B2 (ja) * | 1991-12-02 | 2000-05-08 | 株式会社日立製作所 | ガスタービン燃焼器の制御方法及び制御装置 |
| US5289685A (en) * | 1992-11-16 | 1994-03-01 | General Electric Company | Fuel supply system for a gas turbine engine |
-
1994
- 1994-11-23 FR FR9414013A patent/FR2727192B1/fr not_active Expired - Fee Related
-
1995
- 1995-11-21 US US08/561,335 patent/US5634328A/en not_active Expired - Lifetime
- 1995-11-22 DE DE69514320T patent/DE69514320T2/de not_active Expired - Lifetime
- 1995-11-22 EP EP95402625A patent/EP0718559B1/fr not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10032471A1 (de) * | 2000-07-04 | 2002-01-17 | Rolls Royce Deutschland | Verfahren zur Adaption des Betriebszustandes einer gestuften Brennkammer für Gasturbinen |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0718559A1 (fr) | 1996-06-26 |
| US5634328A (en) | 1997-06-03 |
| FR2727192A1 (fr) | 1996-05-24 |
| DE69514320T2 (de) | 2000-08-24 |
| FR2727192B1 (fr) | 1996-12-20 |
| DE69514320D1 (de) | 2000-02-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2605952C (fr) | Injecteur de carburant pour chambre de combustion de moteur a turbine a gaz | |
| EP1857741B1 (fr) | Chambre de combustion d'une turbomachine | |
| US6532726B2 (en) | Gas-turbine engine combustion system | |
| EP0671590B1 (fr) | Système d'injection à prémélange | |
| US8387391B2 (en) | Aerodynamically enhanced fuel nozzle | |
| CA2398669C (fr) | Chambre de combustion annulaire a double tete etagee | |
| US6474070B1 (en) | Rich double dome combustor | |
| US4463568A (en) | Fuel injector for gas turbine engines | |
| JP4076058B2 (ja) | 燃料噴射装置 | |
| EP0214003B1 (fr) | Dispositif d'injection à bol elargi pour chambre de combustion de turbomachine | |
| US20120151928A1 (en) | Cooling flowpath dirt deflector in fuel nozzle | |
| FR2626043A1 (fr) | Dispositif de formation de turbulences-injecteur de carburant pour ensemble de combustion dans une turbine a gaz | |
| EP1923636B1 (fr) | Dispositif d'injection d'un mélange d'air et de carburant, chambre de combustion et turbomachine munies d'un tel dispositif | |
| JPH04227410A (ja) | 後部装填式燃料ノズル | |
| FR2660736A1 (fr) | Assemblage de combustion etagee pauvre. | |
| JP2003510549A (ja) | 可変予混合希薄燃焼燃焼器 | |
| US12038177B1 (en) | Fuel injector assembly for gas turbine engine with fuel, air and steam injection | |
| EP0718559B1 (fr) | Système d'injection d'une chambre de combustion à deux têtes | |
| FR2695460A1 (fr) | Chambre de combustion de turbomachine à plusieurs injecteurs. | |
| FR2608258A1 (fr) | Dispositif de combustion pour un moteur a turbine a gaz | |
| FR2694799A1 (fr) | Chambre de combustion annulaire conventionnelle à plusieurs injecteurs. | |
| EP4191138B1 (fr) | Module d'injecteur de moteur à turbine à gaz avec conduits de carburant couplés thermiquement ayant des sorties respectives | |
| US12546469B1 (en) | Gas turbine engine fuel injector with multiple fuel circuits | |
| EP4004443B1 (fr) | Chambre de combustion comportant des systèmes d'injection secondaires et procédé d'alimentation en carburant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19951220 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB |
|
| 17Q | First examination report despatched |
Effective date: 19980212 |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB |
|
| REF | Corresponds to: |
Ref document number: 69514320 Country of ref document: DE Date of ref document: 20000210 |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20000125 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: TP Ref country code: FR Ref legal event code: CD |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: CD |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: 732E Free format text: REGISTERED BETWEEN 20120517 AND 20120523 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20131022 Year of fee payment: 19 Ref country code: GB Payment date: 20131025 Year of fee payment: 19 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20141120 Year of fee payment: 20 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 69514320 Country of ref document: DE |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20141122 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150602 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20141122 |