US20150128600A1 - Fuel injection system for a turbine engine - Google Patents
Fuel injection system for a turbine engine Download PDFInfo
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- US20150128600A1 US20150128600A1 US14/078,920 US201314078920A US2015128600A1 US 20150128600 A1 US20150128600 A1 US 20150128600A1 US 201314078920 A US201314078920 A US 201314078920A US 2015128600 A1 US2015128600 A1 US 2015128600A1
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- Prior art keywords
- injector assembly
- assembly stage
- fuel
- premix
- primary
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- 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
- F23R3/286—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply having fuel-air premixing devices
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- 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
- F23R3/346—Feeding into different combustion zones for staged combustion
Definitions
- This invention is directed generally to turbine engines, and more particularly to fuel system for turbine engines.
- gas turbine engines include a plurality of injectors for injecting fuel into a combustor to mix with air upstream of a flame zone.
- the fuel injectors of conventional turbine engines may be arranged in one of at least three different schemes.
- Fuel injectors may be positioned in a lean premix flame system in which fuel is injected in the air stream far enough upstream of the location at which the fuel/air mixture is ignited that the air and fuel are completely mixed upon burning in the flame zone.
- Fuel injectors may also be configured in a diffusion flame system such that fuel and air are mixed and burned simultaneously.
- fuel injectors may inject fuel upstream of the flame zone a sufficient distance that some of the air is mixed with the fuel.
- Partially premixed systems are combinations of a lean premix flame system and a diffusion flame system.
- fuel is injected into the combustion chamber through the injectors into three or four stages, such as a pilot nozzle, an A-stage, a B-stage, and a C-stage (for configurations having tophat injection or pilot premix features).
- the pilot nozzle may also be formed from premix and diffusion stages.
- the pilot nozzle provides fuel that is burned to provide a mini-diffusion flame injector and also provides stability for the premixed A-, B-, and C-stages.
- turbine engines are run using high levels of airflow, thereby resulting in lean fuel mixtures with a flame temperature low enough to prevent the formation of a significant amount of NO x .
- lean flames have a low flame temperature, lean flames are prone to high CO production. And because excess CO production is harmful, a need exists to limit CO emissions.
- Turbine engines often operate at higher fuel to air ratios at partial loads rather than at full load.
- turbine engines are designed for full loads.
- nozzles designed to run at full load run excessively lean at partial loads.
- IGVs Inlet guide vanes
- IGVs may only be used to restrict air flow a limited amount.
- Fuel staging is used to control fuel injection at loads below which IGVs may be used effectively.
- Fuel staging is a process of emitting fuel from less than all of the injectors in a fuel system. By reducing the number of injectors through which fuel is ejected, the amount of fuel passed through the injectors during operation of the turbine engine at partial loads is increased, and thus, burnout is improved.
- using fuel staging requires duplicative auxiliary piping, orifice fuel flow meters, pressure sensors, temperature sensors, and sensors for determining pressure differences. Thus, a need exists for creating efficiencies in a fuel system while maintaining acceptable engine dynamics and NOx emissions.
- a fuel system for a turbine engine for improving the efficiency in a fuel system where a major stage and secondary stage can be combined and held to a relatively constant fuel ratio while maintaining acceptable engine dynamics and NOx emissions is disclosed.
- the fuel system may be formed from a first premix injector assembly stage positioned upstream from a combustor basket, whereby the first premix injector assembly stage is a secondary injector system.
- the fuel system may be formed from a first primary injector assembly stage, which is a main injector system, positioned downstream from the first premix injector assembly.
- the first premix injector assembly stage and the first primary injector assembly stage may be coupled together such that the fuel system is capable of emitting fuel into a combustor of the turbine engine via the first premix injector assembly stage and the primary injector assembly stage simultaneously.
- the fuel system for a turbine engine may include a first premix injector assembly stage comprising at least one injector positioned upstream from a combustor basket, whereby the first premix injector assembly stage is a secondary injector system.
- the fuel system may also include a first primary injector assembly stage comprising at least one injector positioned downstream from the first premix injector assembly, whereby the first primary injector assembly is a main injector system.
- the first premix injector assembly stage and the first primary injector assembly stage may be positioned such that a distance between the first premix injector assembly stage and a flame in the combustor is greater than a distance between the first primary injector assembly stage and the flame in the combustor.
- the first premix injector assembly stage and the first primary injector assembly stage may be coupled together such that the fuel system is capable of emitting fuel into a combustor of the turbine engine via the first premix injector assembly stage and the primary injector assembly stage simultaneously.
- the first premix injector assembly stage and the first primary injector assembly stage may be coupled together via a fuel manifold such that fuel supplied to the fuel manifold is distributed to the first premix injector assembly stage and the first primary injector assembly stage.
- a tuning orifice plate may be positioned inline with the first premix injector assembly stage to regulate a fuel ratio of the combined first premix injector assembly stage and the first primary injector assembly stage.
- the first premix injector assembly stage may be positioned upstream from a preswirler positioned within the fuel system.
- the first primary injector assembly stage is positioned at the preswirler or may be positioned downstream from the preswirler.
- the fuel system may be configured such that the first premix injector assembly stage may inject between about 10 percent and about 20 percent of the total fuel injected into the combustor.
- the first primary injector assembly stage may be configured to inject between about 25 percent and about 45 percent of the total fuel injected into the combustor.
- the fuel system may also include a pilot stage formed from at least one injector positioned downstream from the first premix injector assembly stage. In at least one embodiment, the pilot stage may be configured to inject less than 10 percent of the total fuel injected into the combustor.
- the fuel system may also include a second primary injector assembly stage comprising at least one injector positioned downstream from the first premix injector assembly, whereby the second primary injector assembly is a main injector system.
- the first primary injector assembly stage may emit at least 40 percent of a total fuel injected by the main injectors of the fuel system.
- the first primary injector assembly stage may emit at least 50 percent of a total fuel injected by the main injectors of the fuel system.
- An advantage of the fuel system is that the fuel system can combine primary and secondary fuel injector assembly stages while maintaining acceptable engine dynamics and NOx emissions, thereby eliminating the need for duplicative auxiliary piping, orifice fuel flow meter, pressure sensor, temperature sensor, and sensors for determining pressure differences.
- FIG. 1 is a cross-sectional view of a portion of a turbine engine including a fuel system according to the instant invention.
- FIG. 2 is detailed, cross-sectional side view of a combustor with the fuel system including aspects of this invention.
- FIG. 3 is a detailed, cross-sectional side view of an alternative embodiment of the fuel system.
- FIG. 4 is a side view of the combustor with the fuel system.
- FIG. 5 is a graph of typical engine fuel flow for a primary fuel stage and a secondary fuel stage.
- FIG. 6 is a schematic diagram of the fuel system with a combined primary fuel stage and secondary fuel stage.
- a fuel system 10 for a turbine engine 12 for improving the efficiency in the fuel system 10 where a major stage 14 and secondary stage 16 can be combined and held to a relatively constant fuel ratio while maintaining acceptable engine dynamics and NOx emissions is disclosed.
- the fuel system 10 may be formed from a first premix injector assembly stage 18 positioned upstream from a combustor basket 20 , whereby the first premix injector assembly stage 18 is a secondary injector system.
- the fuel system 10 may be formed from a first primary injector assembly stage 22 , which is a primary injector system, positioned downstream from the first premix injector assembly stage 18 .
- the first premix injector assembly stage 18 and the first primary injector assembly stage 22 may be coupled together such that the fuel system 10 is capable of emitting fuel into a combustor 24 of the turbine engine 12 via the first premix injector assembly stage 18 and the primary injector assembly stage 22 simultaneously.
- the fuel system 10 for a turbine engine may include a first premix injector assembly stage 18 formed from one or more injectors 26 positioned upstream from the combustor basket 20 , as shown in FIGS. 1-3 .
- the first premix injector assembly stage 18 may be a secondary injector system 16 .
- the first premix injector assembly stage 18 may be configured such that the first premix injector assembly stage 18 may inject between about 10 percent and about 20 percent of the total fuel injected into the combustor 24 at full load.
- the fuel system 10 may also include a first primary injector assembly stage 22 formed from one or more injectors 28 positioned downstream from the first premix injector assembly, whereby the first primary injector assembly is a main injector system, as shown in FIGS. 1-3 .
- the first premix injector assembly stage 18 and the first primary injector assembly stage 22 may be positioned such that a distance between the first premix injector assembly stage 18 and a flame 30 in the combustor 24 is greater than a distance between the first primary injector assembly stage 22 and the flame 30 in the combustor 24 .
- the first premix injector assembly stage 18 and the first primary injector assembly stage 22 may be coupled together such that the fuel system 10 is capable of emitting fuel into the combustor 24 of the turbine engine 12 via the first premix injector assembly stage 18 and the first primary injector assembly stage 22 simultaneously, as shown in FIG. 6 .
- the first primary injector assembly stage 22 may be configured to inject between about 25 percent and about 45 percent of the total fuel injected into the combustor 24 at full load.
- the first premix injector assembly stage 18 and the first primary injector assembly stage 22 may be coupled together via a fuel manifold 32 , as shown in FIG. 6 , such that fuel supplied to the fuel manifold 32 is distributed to the first premix injector assembly stage 18 and the first primary injector assembly stage 22 .
- a tuning orifice plate 34 may be positioned inline with the first premix injector assembly stage 18 to regulate a fuel ratio of the combined first premix injector assembly stage 18 and the first primary injector assembly stage 22 .
- the fuel ratio may be controlled and kept nearly constant throughout the engine load range, as shown in FIG. 5 .
- the first premix injector assembly stage 18 may be positioned upstream from a preswirler 36 positioned within the fuel system 10 .
- the first primary injector assembly stage 22 may be positioned at the preswirler 36 , as shown in FIG. 3 , such that the downstream end dispensing fuel is at the preswirler 36 .
- the first primary injector assembly stage 22 and specifically the downstream end dispensing fuel, may be positioned downstream from the preswirler 36 .
- the fuel system 10 may also include a pilot stage 38 formed from one or more injectors 40 positioned downstream from the first premix injector assembly stage 18 .
- the pilot stage 38 may be configured to inject less than 10 percent of the total fuel injected into the combustor 24 .
- the fuel system 10 may also include a second primary injector assembly stage 42 formed from one or more injectors 44 positioned downstream from the first premix injector assembly stage 18 , whereby the second primary injector assembly is a main injector system.
- the first primary injector assembly stage 22 may emit at least 40 percent of a total fuel injected by the main injectors of the fuel system 10 .
- the first primary injector assembly stage 22 may emit at least 50 percent of a total fuel injected by the main injectors of the fuel system 10 .
- the fuel system 10 is that the fuel system 10 can combine primary and secondary fuel injector assembly stages 14 , 16 , such as the first premix injector assembly stage 18 and the first primary injector assembly stage 22 while maintaining acceptable engine dynamics and NOx emissions, thereby eliminating the need for duplicative auxiliary piping, orifice fuel flow meter, pressure sensor, temperature sensor, and sensors for determining pressure differences.
- the combined primary and secondary fuel injector assembly stages 14 , 16 may be activated at the same time and operated at the same fuel ratio through the engine loads, such as between 40 percent load and 100 percent load, as shown in FIG. 5 .
- the pilot stage 38 and the second primary injector assembly stage 42 may be operated together with the combined the first premix injector assembly stage 18 and the first primary injector assembly stage 22 to achieve desired engine loads and engine dynamics and not exceeding threshold NOx emissions.
Abstract
A fuel system for a turbine engine for improving efficiency in a fuel system where a major stage and secondary stage can be combined and held to a relatively constant fuel ratio while maintaining acceptable engine dynamics and NOx emissions is disclosed. The fuel system may be formed from a first premix injector assembly stage positioned upstream from a combustor basket, whereby the first premix injector assembly stage is a secondary injector system. The fuel system may be formed from a first primary injector assembly stage, which is a main injector system, positioned downstream from the first premix injector assembly stage. The first premix injector assembly stage and the first primary injector assembly stage may be coupled together such that the fuel system is capable of emitting fuel into a combustor of the turbine engine via the first premix injector assembly stage and the first primary injector assembly stage simultaneously.
Description
- This invention is directed generally to turbine engines, and more particularly to fuel system for turbine engines.
- Typically, gas turbine engines include a plurality of injectors for injecting fuel into a combustor to mix with air upstream of a flame zone. The fuel injectors of conventional turbine engines may be arranged in one of at least three different schemes. Fuel injectors may be positioned in a lean premix flame system in which fuel is injected in the air stream far enough upstream of the location at which the fuel/air mixture is ignited that the air and fuel are completely mixed upon burning in the flame zone. Fuel injectors may also be configured in a diffusion flame system such that fuel and air are mixed and burned simultaneously. In yet another configuration, often referred to as a partially premixed system, fuel injectors may inject fuel upstream of the flame zone a sufficient distance that some of the air is mixed with the fuel. Partially premixed systems are combinations of a lean premix flame system and a diffusion flame system.
- During operation, fuel is injected into the combustion chamber through the injectors into three or four stages, such as a pilot nozzle, an A-stage, a B-stage, and a C-stage (for configurations having tophat injection or pilot premix features). The pilot nozzle may also be formed from premix and diffusion stages. The pilot nozzle provides fuel that is burned to provide a mini-diffusion flame injector and also provides stability for the premixed A-, B-, and C-stages. Often turbine engines are run using high levels of airflow, thereby resulting in lean fuel mixtures with a flame temperature low enough to prevent the formation of a significant amount of NOx. However, because lean flames have a low flame temperature, lean flames are prone to high CO production. And because excess CO production is harmful, a need exists to limit CO emissions.
- Turbine engines often operate at higher fuel to air ratios at partial loads rather than at full load. However, turbine engines are designed for full loads. Thus, nozzles designed to run at full load run excessively lean at partial loads. Inlet guide vanes (IGVs) can be used to reduce air flow through the engine at partial loads, thereby increasing the fuel to air ratio and enabling the engine to operate more efficiently through a larger range of loads. However, IGVs may only be used to restrict air flow a limited amount.
- Fuel staging is used to control fuel injection at loads below which IGVs may be used effectively. Fuel staging is a process of emitting fuel from less than all of the injectors in a fuel system. By reducing the number of injectors through which fuel is ejected, the amount of fuel passed through the injectors during operation of the turbine engine at partial loads is increased, and thus, burnout is improved. However, using fuel staging requires duplicative auxiliary piping, orifice fuel flow meters, pressure sensors, temperature sensors, and sensors for determining pressure differences. Thus, a need exists for creating efficiencies in a fuel system while maintaining acceptable engine dynamics and NOx emissions.
- A fuel system for a turbine engine for improving the efficiency in a fuel system where a major stage and secondary stage can be combined and held to a relatively constant fuel ratio while maintaining acceptable engine dynamics and NOx emissions is disclosed. The fuel system may be formed from a first premix injector assembly stage positioned upstream from a combustor basket, whereby the first premix injector assembly stage is a secondary injector system. The fuel system may be formed from a first primary injector assembly stage, which is a main injector system, positioned downstream from the first premix injector assembly. The first premix injector assembly stage and the first primary injector assembly stage may be coupled together such that the fuel system is capable of emitting fuel into a combustor of the turbine engine via the first premix injector assembly stage and the primary injector assembly stage simultaneously.
- The fuel system for a turbine engine may include a first premix injector assembly stage comprising at least one injector positioned upstream from a combustor basket, whereby the first premix injector assembly stage is a secondary injector system. The fuel system may also include a first primary injector assembly stage comprising at least one injector positioned downstream from the first premix injector assembly, whereby the first primary injector assembly is a main injector system. The first premix injector assembly stage and the first primary injector assembly stage may be positioned such that a distance between the first premix injector assembly stage and a flame in the combustor is greater than a distance between the first primary injector assembly stage and the flame in the combustor. The first premix injector assembly stage and the first primary injector assembly stage may be coupled together such that the fuel system is capable of emitting fuel into a combustor of the turbine engine via the first premix injector assembly stage and the primary injector assembly stage simultaneously.
- The first premix injector assembly stage and the first primary injector assembly stage may be coupled together via a fuel manifold such that fuel supplied to the fuel manifold is distributed to the first premix injector assembly stage and the first primary injector assembly stage. A tuning orifice plate may be positioned inline with the first premix injector assembly stage to regulate a fuel ratio of the combined first premix injector assembly stage and the first primary injector assembly stage. In at least one embodiment, the first premix injector assembly stage may be positioned upstream from a preswirler positioned within the fuel system. The first primary injector assembly stage is positioned at the preswirler or may be positioned downstream from the preswirler.
- The fuel system may be configured such that the first premix injector assembly stage may inject between about 10 percent and about 20 percent of the total fuel injected into the combustor. The first primary injector assembly stage may be configured to inject between about 25 percent and about 45 percent of the total fuel injected into the combustor. The fuel system may also include a pilot stage formed from at least one injector positioned downstream from the first premix injector assembly stage. In at least one embodiment, the pilot stage may be configured to inject less than 10 percent of the total fuel injected into the combustor.
- In another embodiment, the fuel system may also include a second primary injector assembly stage comprising at least one injector positioned downstream from the first premix injector assembly, whereby the second primary injector assembly is a main injector system. The first primary injector assembly stage may emit at least 40 percent of a total fuel injected by the main injectors of the fuel system. In another embodiment, the first primary injector assembly stage may emit at least 50 percent of a total fuel injected by the main injectors of the fuel system.
- An advantage of the fuel system is that the fuel system can combine primary and secondary fuel injector assembly stages while maintaining acceptable engine dynamics and NOx emissions, thereby eliminating the need for duplicative auxiliary piping, orifice fuel flow meter, pressure sensor, temperature sensor, and sensors for determining pressure differences.
- These and other embodiments are described in more detail below.
- The accompanying drawings, which are incorporated in and form a part of the specification, illustrate embodiments of the presently disclosed invention and, together with the description, disclose the principles of the invention.
-
FIG. 1 is a cross-sectional view of a portion of a turbine engine including a fuel system according to the instant invention. -
FIG. 2 is detailed, cross-sectional side view of a combustor with the fuel system including aspects of this invention. -
FIG. 3 is a detailed, cross-sectional side view of an alternative embodiment of the fuel system. -
FIG. 4 is a side view of the combustor with the fuel system. -
FIG. 5 is a graph of typical engine fuel flow for a primary fuel stage and a secondary fuel stage. -
FIG. 6 is a schematic diagram of the fuel system with a combined primary fuel stage and secondary fuel stage. - As shown in
FIGS. 1-6 , afuel system 10 for aturbine engine 12 for improving the efficiency in thefuel system 10 where amajor stage 14 andsecondary stage 16 can be combined and held to a relatively constant fuel ratio while maintaining acceptable engine dynamics and NOx emissions is disclosed. Thefuel system 10 may be formed from a first premixinjector assembly stage 18 positioned upstream from acombustor basket 20, whereby the first premixinjector assembly stage 18 is a secondary injector system. Thefuel system 10 may be formed from a first primaryinjector assembly stage 22, which is a primary injector system, positioned downstream from the first premixinjector assembly stage 18. The first premixinjector assembly stage 18 and the first primaryinjector assembly stage 22 may be coupled together such that thefuel system 10 is capable of emitting fuel into acombustor 24 of theturbine engine 12 via the first premixinjector assembly stage 18 and the primaryinjector assembly stage 22 simultaneously. - The
fuel system 10 for a turbine engine may include a first premixinjector assembly stage 18 formed from one ormore injectors 26 positioned upstream from thecombustor basket 20, as shown inFIGS. 1-3 . The first premixinjector assembly stage 18 may be asecondary injector system 16. In at least one embodiment, the first premixinjector assembly stage 18 may be configured such that the first premixinjector assembly stage 18 may inject between about 10 percent and about 20 percent of the total fuel injected into thecombustor 24 at full load. - The
fuel system 10 may also include a first primaryinjector assembly stage 22 formed from one ormore injectors 28 positioned downstream from the first premix injector assembly, whereby the first primary injector assembly is a main injector system, as shown inFIGS. 1-3 . The first premixinjector assembly stage 18 and the first primaryinjector assembly stage 22 may be positioned such that a distance between the first premixinjector assembly stage 18 and aflame 30 in thecombustor 24 is greater than a distance between the first primaryinjector assembly stage 22 and theflame 30 in thecombustor 24. The first premixinjector assembly stage 18 and the first primaryinjector assembly stage 22 may be coupled together such that thefuel system 10 is capable of emitting fuel into thecombustor 24 of theturbine engine 12 via the first premixinjector assembly stage 18 and the first primaryinjector assembly stage 22 simultaneously, as shown inFIG. 6 . In at least one embodiment, the first primaryinjector assembly stage 22 may be configured to inject between about 25 percent and about 45 percent of the total fuel injected into thecombustor 24 at full load. - The first premix
injector assembly stage 18 and the first primaryinjector assembly stage 22 may be coupled together via afuel manifold 32, as shown inFIG. 6 , such that fuel supplied to thefuel manifold 32 is distributed to the first premixinjector assembly stage 18 and the first primaryinjector assembly stage 22. A tuningorifice plate 34 may be positioned inline with the first premixinjector assembly stage 18 to regulate a fuel ratio of the combined first premixinjector assembly stage 18 and the first primaryinjector assembly stage 22. The fuel ratio may be controlled and kept nearly constant throughout the engine load range, as shown inFIG. 5 . In at least one embodiment, the first premixinjector assembly stage 18 may be positioned upstream from apreswirler 36 positioned within thefuel system 10. The first primaryinjector assembly stage 22 may be positioned at thepreswirler 36, as shown inFIG. 3 , such that the downstream end dispensing fuel is at thepreswirler 36. In another embodiment, as shown inFIG. 4 , the first primaryinjector assembly stage 22, and specifically the downstream end dispensing fuel, may be positioned downstream from thepreswirler 36. - The
fuel system 10 may also include apilot stage 38 formed from one ormore injectors 40 positioned downstream from the first premixinjector assembly stage 18. In at least one embodiment, thepilot stage 38 may be configured to inject less than 10 percent of the total fuel injected into thecombustor 24. - In another embodiment, the
fuel system 10 may also include a second primaryinjector assembly stage 42 formed from one ormore injectors 44 positioned downstream from the first premixinjector assembly stage 18, whereby the second primary injector assembly is a main injector system. The first primaryinjector assembly stage 22 may emit at least 40 percent of a total fuel injected by the main injectors of thefuel system 10. In another embodiment, the first primaryinjector assembly stage 22 may emit at least 50 percent of a total fuel injected by the main injectors of thefuel system 10. - The
fuel system 10 is that thefuel system 10 can combine primary and secondary fuel injector assembly stages 14, 16, such as the first premixinjector assembly stage 18 and the first primaryinjector assembly stage 22 while maintaining acceptable engine dynamics and NOx emissions, thereby eliminating the need for duplicative auxiliary piping, orifice fuel flow meter, pressure sensor, temperature sensor, and sensors for determining pressure differences. - During operation, the combined primary and secondary fuel injector assembly stages 14, 16, such as the first premix
injector assembly stage 18 and the first primaryinjector assembly stage 22, may be activated at the same time and operated at the same fuel ratio through the engine loads, such as between 40 percent load and 100 percent load, as shown inFIG. 5 . In embodiments including thepilot stage 38 and the second primaryinjector assembly stage 42, thepilot stage 38 and the second primaryinjector assembly stage 42 may be operated together with the combined the first premixinjector assembly stage 18 and the first primaryinjector assembly stage 22 to achieve desired engine loads and engine dynamics and not exceeding threshold NOx emissions. - The foregoing is provided for purposes of illustrating, explaining, and describing embodiments of this invention. Modifications and adaptations to these embodiments will be apparent to those skilled in the art and may be made without departing from the scope or spirit of this invention.
Claims (20)
1. A fuel system for a turbine engine, comprising:
a first premix injector assembly stage comprising at least one injector positioned upstream from a combustor basket, wherein the first premix injector assembly stage is a secondary injector system;
a first primary injector assembly stage comprising at least one injector positioned downstream from the first premix injector assembly stage, wherein the first primary injector assembly stage is a main injector system;
wherein the first premix injector assembly stage and the first primary injector assembly stage are coupled together such that the fuel system is capable of emitting fuel into a combustor of the turbine engine via the first premix injector assembly stage and the first primary injector assembly stage simultaneously; and
wherein a distance between the first premix injector assembly stage and a flame in the combustor is greater than a distance between the first primary injector assembly stage and the flame in the combustor.
2. The fuel system of claim 1 , wherein the first premix injector assembly stage and the first primary injector assembly stage are coupled together via a fuel manifold such that fuel supplied to the fuel manifold is distributed to the first premix injector assembly stage and the first primary injector assembly stage.
3. The fuel system of claim 2 , further comprising a tuning orifice plate positioned inline with the first premix injector assembly stage to regulate a fuel ratio of the combined first premix injector assembly stage and the first primary injector assembly stage.
4. The fuel system of claim 1 , wherein the first premix injector assembly stage is positioned upstream from a preswirler positioned within the fuel system.
5. The fuel system of claim 4 , wherein the first primary injector assembly stage is positioned at the preswirler.
6. The fuel system of claim 4 , wherein the first primary injector assembly stage is positioned downstream from the preswirler.
7. The fuel system of claim 1 , wherein the first premix injector assembly stage is configured to inject between about 10 percent and about 20 percent of the total fuel injected into the combustor.
8. The fuel system of claim 1 , wherein the first primary injector assembly stage is configured to inject between about 25 percent and about 45 percent of the total fuel injected into the combustor.
9. The fuel system of claim 1 , further comprising a pilot stage formed from at least one injector positioned downstream from the first premix injector assembly stage.
10. The fuel system of claim 9 , wherein the pilot stage is configured to inject less than 10 percent of the total fuel injected into the combustor.
11. The fuel system of claim 1 , further comprising a second primary injector assembly stage comprising at least one injector positioned downstream from the first premix injector assembly stage, wherein the second primary injector assembly stage is a main injector system.
12. The fuel system of claim 11 , wherein the first primary injector assembly stage emits at least 40 percent of a total fuel injected by the main injectors of the fuel system.
13. The fuel system of claim 12 , wherein the first primary injector assembly stage emits at least 50 percent of a total fuel injected by the main injectors of the fuel system.
14. A fuel system for a turbine engine, comprising:
a first premix injector assembly stage comprising at least one injector positioned upstream from a combustor basket, wherein the first premix injector assembly stage is a secondary injector system;
a first primary injector assembly stage comprising at least one injector positioned downstream from the first premix injector assembly stage, wherein the first primary injector assembly stage is a main injector system;
a second primary injector assembly stage comprising at least one injector positioned downstream from the first premix injector assembly stage, wherein the second primary injector assembly stage is a main injector system;
a pilot stage formed from at least one injector positioned downstream from the first premix injector assembly stage;
wherein the first premix injector assembly stage and the first primary injector assembly stage are coupled together such that the fuel system is capable of emitting fuel into a combustor of the turbine engine via the first premix injector assembly stage and the first primary injector assembly stage simultaneously; and
wherein a distance between the first premix injector assembly stage and a flame in the combustor is greater than a distance between the first primary injector assembly stage and the flame in the combustor.
15. The fuel system of claim 14 , wherein the first premix injector assembly stage and the first primary injector assembly stage are coupled together via a fuel manifold such that fuel supplied to the fuel manifold is distributed to the first premix injector assembly stage and the first primary injector assembly stage and further comprising a tuning orifice plate positioned inline with the first premix injector assembly stage to regulate a fuel ratio of the combined first premix injector assembly stage and the first primary injector assembly stage.
16. The fuel system of claim 15 , wherein the first premix injector assembly stage is positioned upstream from a preswirler positioned within the fuel system.
17. The fuel system of claim 15 , wherein the first premix injector assembly stage is configured to inject between about 10 percent and about 20 percent of the total fuel injected into the combustor, wherein the first primary injector assembly stage is configured to inject between about 25 percent and about 45 percent of the total fuel injected into the combustor, and wherein the pilot stage is configured to inject less than 10 percent of the total fuel injected into the combustor.
18. The fuel system of claim 15 , wherein the first primary injector assembly stage emits at least 40 percent of a total fuel injected by the main injectors of the fuel system.
19. A fuel system for a turbine engine, comprising:
a first premix injector assembly stage comprising at least one injector positioned upstream from a combustor basket, wherein the first premix injector assembly stage is a secondary injector system;
a first primary injector assembly stage comprising at least one injector positioned downstream from the first premix injector assembly stage, wherein the first primary injector assembly stage is a main injector system;
a second primary injector assembly stage comprising at least one injector positioned downstream from the first premix injector assembly stage, wherein the second primary injector assembly stage is a main injector system;
a pilot stage formed from at least one injector positioned downstream from the first premix injector assembly stage;
wherein the first premix injector assembly stage and the first primary injector assembly stage are coupled together such that the fuel system is capable of emitting fuel into a combustor of the turbine engine via the first premix injector assembly stage and the first primary injector assembly stage simultaneously;
wherein a distance between the first premix injector assembly stage and a flame in the combustor is greater than a distance between the first primary injector assembly stage and the flame in the combustor;
wherein the first premix injector assembly stage and the first primary injector assembly stage are coupled together via a fuel manifold such that fuel supplied to the fuel manifold is distributed to the first premix injector assembly stage and the first primary injector assembly stage;
a tuning orifice plate positioned inline with the first premix injector assembly stage to regulate a fuel ratio of the combined first premix injector assembly stage and the first primary injector assembly stage; and
wherein the first premix injector assembly stage is positioned upstream from a preswirler positioned within the fuel system.
20. The fuel system of claim 19 , wherein the first premix injector assembly stage is configured to inject between about 10 percent and about 20 percent of the total fuel injected into the combustor, wherein the first primary injector assembly stage is configured to inject between about 25 percent and about 45 percent of the total fuel injected into the combustor, wherein the pilot stage is configured to inject less than 10 percent of the total fuel injected into the combustor; and wherein the first primary injector assembly stage emits at least 40 percent of a total fuel injected by the main injectors of the fuel system.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/078,920 US20150128600A1 (en) | 2013-11-13 | 2013-11-13 | Fuel injection system for a turbine engine |
PCT/US2014/063065 WO2015073215A1 (en) | 2013-11-13 | 2014-10-30 | Fuel injection system for a turbine engine |
CN201480062078.4A CN105723155A (en) | 2013-11-13 | 2014-10-30 | Fuel injection system for a turbine engine |
JP2016531025A JP2017502237A (en) | 2013-11-13 | 2014-10-30 | Fuel injection system for turbine engine |
EP14799290.3A EP3069081A1 (en) | 2013-11-13 | 2014-10-30 | Fuel injection system for a turbine engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/078,920 US20150128600A1 (en) | 2013-11-13 | 2013-11-13 | Fuel injection system for a turbine engine |
Publications (1)
Publication Number | Publication Date |
---|---|
US20150128600A1 true US20150128600A1 (en) | 2015-05-14 |
Family
ID=51901003
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/078,920 Abandoned US20150128600A1 (en) | 2013-11-13 | 2013-11-13 | Fuel injection system for a turbine engine |
Country Status (5)
Country | Link |
---|---|
US (1) | US20150128600A1 (en) |
EP (1) | EP3069081A1 (en) |
JP (1) | JP2017502237A (en) |
CN (1) | CN105723155A (en) |
WO (1) | WO2015073215A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11156164B2 (en) | 2019-05-21 | 2021-10-26 | General Electric Company | System and method for high frequency accoustic dampers with caps |
US11174792B2 (en) | 2019-05-21 | 2021-11-16 | General Electric Company | System and method for high frequency acoustic dampers with baffles |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3625504B1 (en) * | 2017-05-16 | 2021-11-24 | Siemens Energy Global GmbH & Co. KG | Binary fuel staging scheme for improved turndown emissions in lean premixed gas turbine combustion |
US10976052B2 (en) | 2017-10-25 | 2021-04-13 | General Electric Company | Volute trapped vortex combustor assembly |
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US7036302B2 (en) * | 2004-03-15 | 2006-05-02 | General Electric Company | Controlled pressure fuel nozzle system |
US20130139511A1 (en) * | 2011-03-16 | 2013-06-06 | Mitsubishi Heavy Industries, Ltd. | Gas turbine combustor and gas turbine |
US20130160423A1 (en) * | 2011-12-21 | 2013-06-27 | Samer P. Wasif | Can annular combustion arrangement with flow tripping device |
US20130312421A1 (en) * | 2012-05-24 | 2013-11-28 | Solar Turbines Incorporated | Fuel control system for a gas turbine engine |
US20140123651A1 (en) * | 2012-11-06 | 2014-05-08 | Ernest W. Smith | System for providing fuel to a combustor assembly in a gas turbine engine |
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US6996991B2 (en) * | 2003-08-15 | 2006-02-14 | Siemens Westinghouse Power Corporation | Fuel injection system for a turbine engine |
FR2867552B1 (en) * | 2004-03-15 | 2008-07-11 | Gen Electric | FUEL INJECTOR WITH REGULATED PRESSURE |
US8769955B2 (en) * | 2010-06-02 | 2014-07-08 | Siemens Energy, Inc. | Self-regulating fuel staging port for turbine combustor |
-
2013
- 2013-11-13 US US14/078,920 patent/US20150128600A1/en not_active Abandoned
-
2014
- 2014-10-30 JP JP2016531025A patent/JP2017502237A/en active Pending
- 2014-10-30 CN CN201480062078.4A patent/CN105723155A/en active Pending
- 2014-10-30 EP EP14799290.3A patent/EP3069081A1/en not_active Withdrawn
- 2014-10-30 WO PCT/US2014/063065 patent/WO2015073215A1/en active Application Filing
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US7036302B2 (en) * | 2004-03-15 | 2006-05-02 | General Electric Company | Controlled pressure fuel nozzle system |
US20130139511A1 (en) * | 2011-03-16 | 2013-06-06 | Mitsubishi Heavy Industries, Ltd. | Gas turbine combustor and gas turbine |
US20130160423A1 (en) * | 2011-12-21 | 2013-06-27 | Samer P. Wasif | Can annular combustion arrangement with flow tripping device |
US20130312421A1 (en) * | 2012-05-24 | 2013-11-28 | Solar Turbines Incorporated | Fuel control system for a gas turbine engine |
US20140123651A1 (en) * | 2012-11-06 | 2014-05-08 | Ernest W. Smith | System for providing fuel to a combustor assembly in a gas turbine engine |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US11156164B2 (en) | 2019-05-21 | 2021-10-26 | General Electric Company | System and method for high frequency accoustic dampers with caps |
US11174792B2 (en) | 2019-05-21 | 2021-11-16 | General Electric Company | System and method for high frequency acoustic dampers with baffles |
Also Published As
Publication number | Publication date |
---|---|
EP3069081A1 (en) | 2016-09-21 |
JP2017502237A (en) | 2017-01-19 |
CN105723155A (en) | 2016-06-29 |
WO2015073215A1 (en) | 2015-05-21 |
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