US20180051883A1 - Pre-mixing based fuel nozzle for use in a combustion turbine engine - Google Patents
Pre-mixing based fuel nozzle for use in a combustion turbine engine Download PDFInfo
- Publication number
- US20180051883A1 US20180051883A1 US15/555,188 US201515555188A US2018051883A1 US 20180051883 A1 US20180051883 A1 US 20180051883A1 US 201515555188 A US201515555188 A US 201515555188A US 2018051883 A1 US2018051883 A1 US 2018051883A1
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- Prior art keywords
- mixing
- fuel
- array
- conduits
- conduit
- Prior art date
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- Abandoned
Links
- 238000002156 mixing Methods 0.000 title claims abstract description 71
- 239000000446 fuel Substances 0.000 title claims abstract description 70
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 16
- 239000012530 fluid Substances 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- UHZZMRAGKVHANO-UHFFFAOYSA-M chlormequat chloride Chemical compound [Cl-].C[N+](C)(C)CCCl UHZZMRAGKVHANO-UHFFFAOYSA-M 0.000 abstract 1
- 239000003570 air Substances 0.000 description 21
- 239000007789 gas Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 238000003491 array Methods 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000007704 transition 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
- F23R3/286—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply having fuel-air premixing devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2206/00—Burners for specific applications
- F23D2206/10—Turbines
Definitions
- Disclosed embodiments are generally related to a fuel nozzle for use in a combustion turbine engine, such as a gas turbine engine and, more particularly, to a pre-mixing type of fuel nozzle that in one non-limiting application may be used in a distributed combustion system (DCS) injection system.
- DCS distributed combustion system
- fuel is delivered from a fuel source to a combustion section where the fuel is mixed with air and ignited to generate hot combustion products defining working gases.
- the working gases are directed to a turbine section.
- the combustion section may comprise one or more stages, each stage supplying fuel to be ignited. See U.S. Pat. Nos. 8,281,594 and 8,752,386 in connection with fuel nozzles involving pre-mixing of air and fuel.
- FIG. 1 is an isometric view that may be helpful for visualizing an upstream end of one non-limiting embodiment of a fuel nozzle embodying aspects of the invention that may be used in a combustor of a combustion turbine engine.
- FIG. 2 is a top view of the upstream end of the fuel nozzle shown in FIG. 1 .
- FIG. 3 is a bottom view of a downstream end of the fuel nozzle shown in FIG. 1 .
- FIG. 4 is a cross-sectional view illustrating a non-limiting schematic representation of respective pre-mixing conduits and air flow conduits constructed in the body of the fuel nozzle.
- FIG. 5 is a cross-sectional view illustrating a non-limiting schematic representation of fuel flow in a fuel-directing structure constructed in the body of the fuel nozzle.
- FIG. 6 is a top view illustrating a non-limiting schematic representation of fuel-injecting locations in a given pre-mixing conduit.
- FIG. 7 is a simplified schematic of one non-limiting embodiment of a combustion turbine engine, such as a gas turbine engine, that can benefit from disclosed embodiments of the present invention.
- the inventors of the present invention have recognized certain issues that can arise in the context of certain prior art fuel nozzles involving pre-mixing of air and fuel, also referred in the art as micro-mixing. These prior art fuel nozzles generally involve a large number of point injection arrays having a relatively small diameter, and the fabrication of such injection arrays may involve costly fabrication techniques. In view of such a recognition, the present inventors propose an improved fuel nozzle that can benefit from more economical fabrication techniques while providing appropriate levels of NO x emissions and enabling practically a flashback-free operation, even on applications involving a relatively high-content of hydrogen fuel.
- FIG. 1 is an isometric view of one non-limiting embodiment of a fuel nozzle 10 embodying aspects of the invention that in one non-limiting application may be used in a combustor of a combustion turbine engine, such as a gas turbine engine.
- Fuel nozzle 10 includes a body 12 having an inlet end 14 and an outlet end 16 and defines a central axis 18 that extends between inlet end 14 and outlet end 16 along an axial direction of the fuel nozzle.
- an array of pre-mixing conduits 20 extends between inlet end 14 and outlet end 16 of body 12 .
- the array of pre-mixing conduits 20 is circumferentially disposed about central axis 18 .
- Each pre-mixing conduit 20 is fluidly coupled to receive air at a respective inlet.
- fuel nozzle 10 further includes an array of air flow conduits 22 disposed radially inwardly relative to the array of pre-mixing conduits 20 .
- fuel nozzle 10 may include means to aerodynamically reduce flow recirculation (flow separation) in the array of pre-mixing conduits 20 . It will be appreciated that the reduction of flow recirculation need not be limited to within the array of pre-mixing conduits 20 , since zones beyond outlet end 16 can also benefit from such flow recirculation reduction. As may be appreciated in FIG.
- the means to aerodynamically reduce the flow recirculation in a respective pre-mixing conduit 20 may comprise an inter-conduit passageway 24 arranged to provide fluid communication between the respective pre-mixing conduit 20 and a corresponding air flow conduit 22 . It will be appreciated that the geometry of pre-mixing conduits 20 may be optionally configured to reduce flow recirculation in combination or in lieu of inter-conduit passageways 24 .
- fuel nozzle 10 further includes a fuel-directing structure 26 that in one-non-limiting embodiment includes a plurality of non-swirl elements 28 .
- Each non-swirl element includes a radially-extending passageway to direct fuel flow along a radial direction (schematically represented by arrows 30 ).
- Each non-swirl element 28 includes at least one orifice 32 arranged to inject the fuel that flows along the radial direction into a respective air/fuel pre-mixing conduit.
- orifices 32 may be located in regions of relatively high axial flow velocity, thus increasing the static pressure drop across orifices 32 . See FIG.
- Fuel-directing structure 26 further includes a central passageway 36 ( FIG. 5 ) arranged to direct fuel flow along the axial direction (schematically represented by arrows 38 ) towards a central outlet 39 .
- the array of pre-mixing conduits 20 each comprises at least a respective pre-mixing conduit segment (schematically represented by line 40 ( FIG. 4 )) having a cross-sectional area that increases as the respective pre-mixing conduit segment extends from a location between inlet end 14 and outlet end 16 towards a respective outlet 41 of the respective pre-mixing conduit. This may be effective so that flow velocity is increased without substantially increasing the overall pressure drop.
- pre-mixing conduit segment 40 includes at least one surface 42 tilted radially inwardly relative to central axis 18 as the segment extends towards the respective outlet 41 of the respective pre-mixing conduit 20 .
- the array of air flow conduits 22 each comprises at least a respective air flow conduit segment (schematically represented by line 44 ( FIG. 4 ) having a cross-sectional area that decreases as the respective air flow conduit segment 44 extends from a respective inlet 45 of the respective air flow conduit 22 towards a location between inlet end 14 and outlet end 16 .
- the array of air flow conduits 22 each comprises an outlet 46 arranged radially inwardly relative to central axis 18 .
- central outlet 39 of central passageway 36 in combination with the respective outlets 46 of the array of air flow conduits 22 forms a jet-assisted mixing stage.
- FIG. 7 is a simplified schematic of one non-limiting embodiment of a combustion turbine engine 50 , such as gas turbine engine, that can benefit from disclosed embodiments of the present invention.
- Combustion turbine engine 50 may comprise a compressor 52 , a combustor 54 , a combustion chamber 56 , and a turbine 58 .
- compressor 52 takes in ambient air and provides compressed air to a diffuser 60 , which passes the compressed air to a plenum 62 through which the compressed air passes to combustor 54 , which mixes the compressed air with fuel, and provides combusted, hot working gas via a transition 64 to turbine 58 , which can drive power-generating equipment (not shown) to generate electricity.
- a shaft 66 is shown connecting turbine 58 to drive compressor 52 .
- Disclosed embodiments of a fuel nozzle embodying aspects of the present invention may be incorporated in combustor 54 of the combustion turbine engine to achieve superior pre-mixing of fuel and air.
- disclosed embodiments are expected to provide a cost-effective fuel nozzle including arrays of fluid flow conduits that produce a substantially homogenous mixture of fuel and air at the outlet end of the nozzle and thus effective to produce appropriate pre-mixing of fuel and air conducive to ultra-low levels of NO x emissions. Additionally, disclosed embodiments need not involve swirler elements, and thus flashback resistance is substantially high, even for fuel blends comprising a high hydrogen content (e.g., at least 50% hydrogen content by volume).
- a high hydrogen content e.g., at least 50% hydrogen content by volume
- nozzle may comprise fluid flow conduits having a minimum diameter in a range from about 0.75 mm to about 1 mm and thus capable of benefiting from relatively low-cost manufacturing technologies, such as, without limitation, three-dimensional (3D) printing, direct metal laser sintering (DLMS), etc., in lieu of presently costlier manufacturing technologies.
- relatively low-cost manufacturing technologies such as, without limitation, three-dimensional (3D) printing, direct metal laser sintering (DLMS), etc.
Abstract
A pre-mixing type of fuel nozzle (10) for use in a combustion turbine engine is provided. The nozzle includes an array of pre-mixing conduits (20) that extends between an inlet end (14) and an outlet end (16) of a body 12 of the nozzle. The nozzle may further include an array of air flow conduits (22) disposed radially inwardly relative to the array of pre-mixing conduits. The nozzle may include an inter-conduit passageway 24 arranged to aerodynamically reduce flow recirculation in the array of pre-mixing conduits. A fuel-directing structure (26) may include non-swirl elements (28) to direct fuel flow along a radial direction, each non-swirl element including at least one orifice (32) to inject the fuel flow directed along the radial direction into a respective pre-mixing conduit to pre-mix air and fuel.
Description
- Development for this invention was supported in part by Contract No. DE-FC26-05NT42644, awarded by the United States Department of Energy. Accordingly, the United States Government may have certain rights in this invention.
- Disclosed embodiments are generally related to a fuel nozzle for use in a combustion turbine engine, such as a gas turbine engine and, more particularly, to a pre-mixing type of fuel nozzle that in one non-limiting application may be used in a distributed combustion system (DCS) injection system.
- In gas turbine engines, fuel is delivered from a fuel source to a combustion section where the fuel is mixed with air and ignited to generate hot combustion products defining working gases. The working gases are directed to a turbine section. The combustion section may comprise one or more stages, each stage supplying fuel to be ignited. See U.S. Pat. Nos. 8,281,594 and 8,752,386 in connection with fuel nozzles involving pre-mixing of air and fuel.
-
FIG. 1 is an isometric view that may be helpful for visualizing an upstream end of one non-limiting embodiment of a fuel nozzle embodying aspects of the invention that may be used in a combustor of a combustion turbine engine. -
FIG. 2 is a top view of the upstream end of the fuel nozzle shown inFIG. 1 . -
FIG. 3 is a bottom view of a downstream end of the fuel nozzle shown inFIG. 1 . -
FIG. 4 is a cross-sectional view illustrating a non-limiting schematic representation of respective pre-mixing conduits and air flow conduits constructed in the body of the fuel nozzle. -
FIG. 5 is a cross-sectional view illustrating a non-limiting schematic representation of fuel flow in a fuel-directing structure constructed in the body of the fuel nozzle. -
FIG. 6 is a top view illustrating a non-limiting schematic representation of fuel-injecting locations in a given pre-mixing conduit. -
FIG. 7 is a simplified schematic of one non-limiting embodiment of a combustion turbine engine, such as a gas turbine engine, that can benefit from disclosed embodiments of the present invention. - The inventors of the present invention have recognized certain issues that can arise in the context of certain prior art fuel nozzles involving pre-mixing of air and fuel, also referred in the art as micro-mixing. These prior art fuel nozzles generally involve a large number of point injection arrays having a relatively small diameter, and the fabrication of such injection arrays may involve costly fabrication techniques. In view of such a recognition, the present inventors propose an improved fuel nozzle that can benefit from more economical fabrication techniques while providing appropriate levels of NOx emissions and enabling practically a flashback-free operation, even on applications involving a relatively high-content of hydrogen fuel.
- In the following detailed description, various specific details are set forth in order to provide a thorough understanding of such embodiments. However, those skilled in the art will understand that embodiments of the present invention may be practiced without these specific details, that the present invention is not limited to the depicted embodiments, and that the present invention may be practiced in a variety of alternative embodiments. In other instances, methods, procedures, and components, which would be well-understood by one skilled in the art have not been described in detail to avoid unnecessary and burdensome explanation.
- Furthermore, various operations may be described as multiple discrete steps performed in a manner that is helpful for understanding embodiments of the present invention. However, the order of description should not be construed as to imply that these operations need be performed in the order they are presented, nor that they are even order dependent, unless otherwise indicated. Moreover, repeated usage of the phrase “in one embodiment” does not necessarily refer to the same embodiment, although it may. It is noted that disclosed embodiments need not be construed as mutually exclusive embodiments, since aspects of such disclosed embodiments may be appropriately combined by one skilled in the art depending on the needs of a given application.
- The terms “comprising”, “including”, “having”, and the like, as used in the present application, are intended to be synonymous unless otherwise indicated. Lastly, as used herein, the phrases “configured to” or “arranged to” embrace the concept that the feature preceding the phrases “configured to” or “arranged to” is intentionally and specifically designed or made to act or function in a specific way and should not be construed to mean that the feature just has a capability or suitability to act or function in the specified way, unless so indicated.
-
FIG. 1 is an isometric view of one non-limiting embodiment of afuel nozzle 10 embodying aspects of the invention that in one non-limiting application may be used in a combustor of a combustion turbine engine, such as a gas turbine engine.Fuel nozzle 10 includes abody 12 having aninlet end 14 and anoutlet end 16 and defines acentral axis 18 that extends betweeninlet end 14 andoutlet end 16 along an axial direction of the fuel nozzle. - As may be appreciated in
FIG. 1 , an array ofpre-mixing conduits 20 extends betweeninlet end 14 andoutlet end 16 ofbody 12. The array ofpre-mixing conduits 20 is circumferentially disposed aboutcentral axis 18. Eachpre-mixing conduit 20 is fluidly coupled to receive air at a respective inlet. - In one non-limiting embodiment,
fuel nozzle 10 further includes an array ofair flow conduits 22 disposed radially inwardly relative to the array of pre-mixingconduits 20. In one non-limiting embodiment,fuel nozzle 10 may include means to aerodynamically reduce flow recirculation (flow separation) in the array ofpre-mixing conduits 20. It will be appreciated that the reduction of flow recirculation need not be limited to within the array ofpre-mixing conduits 20, since zones beyondoutlet end 16 can also benefit from such flow recirculation reduction. As may be appreciated inFIG. 4 , in one non-limiting embodiment, the means to aerodynamically reduce the flow recirculation in a respectivepre-mixing conduit 20 may comprise aninter-conduit passageway 24 arranged to provide fluid communication between the respectivepre-mixing conduit 20 and a correspondingair flow conduit 22. It will be appreciated that the geometry ofpre-mixing conduits 20 may be optionally configured to reduce flow recirculation in combination or in lieu ofinter-conduit passageways 24. - As may be appreciated in
FIG. 5 ,fuel nozzle 10 further includes a fuel-directingstructure 26 that in one-non-limiting embodiment includes a plurality ofnon-swirl elements 28. Each non-swirl element includes a radially-extending passageway to direct fuel flow along a radial direction (schematically represented by arrows 30). Eachnon-swirl element 28 includes at least oneorifice 32 arranged to inject the fuel that flows along the radial direction into a respective air/fuel pre-mixing conduit. Without limitation,orifices 32 may be located in regions of relatively high axial flow velocity, thus increasing the static pressure drop acrossorifices 32. SeeFIG. 6 that illustrates a non-limiting example of fuel-injecting locations (schematically represented by arrows 34) in a givenpre-mixing conduit 20. Fuel-directingstructure 26 further includes a central passageway 36 (FIG. 5 ) arranged to direct fuel flow along the axial direction (schematically represented by arrows 38) towards acentral outlet 39. - In one non-limiting embodiment, the array of
pre-mixing conduits 20 each comprises at least a respective pre-mixing conduit segment (schematically represented by line 40 (FIG. 4 )) having a cross-sectional area that increases as the respective pre-mixing conduit segment extends from a location betweeninlet end 14 andoutlet end 16 towards arespective outlet 41 of the respective pre-mixing conduit. This may be effective so that flow velocity is increased without substantially increasing the overall pressure drop. In one non-limiting embodiment, pre-mixingconduit segment 40 includes at least onesurface 42 tilted radially inwardly relative tocentral axis 18 as the segment extends towards therespective outlet 41 of the respective pre-mixingconduit 20. - In one non-limiting embodiment, the array of
air flow conduits 22 each comprises at least a respective air flow conduit segment (schematically represented by line 44 (FIG. 4 ) having a cross-sectional area that decreases as the respective airflow conduit segment 44 extends from arespective inlet 45 of the respectiveair flow conduit 22 towards a location betweeninlet end 14 andoutlet end 16. In one non-limiting embodiment, the array ofair flow conduits 22 each comprises anoutlet 46 arranged radially inwardly relative tocentral axis 18. In one non-limiting embodiment,central outlet 39 ofcentral passageway 36 in combination with therespective outlets 46 of the array ofair flow conduits 22 forms a jet-assisted mixing stage. It will be appreciated that the respective starting/end points and/or respective geometries of the conduit segments schematically represented bylines -
FIG. 7 is a simplified schematic of one non-limiting embodiment of acombustion turbine engine 50, such as gas turbine engine, that can benefit from disclosed embodiments of the present invention.Combustion turbine engine 50 may comprise acompressor 52, acombustor 54, acombustion chamber 56, and aturbine 58. During operation,compressor 52 takes in ambient air and provides compressed air to adiffuser 60, which passes the compressed air to aplenum 62 through which the compressed air passes tocombustor 54, which mixes the compressed air with fuel, and provides combusted, hot working gas via atransition 64 toturbine 58, which can drive power-generating equipment (not shown) to generate electricity. Ashaft 66 is shown connectingturbine 58 to drivecompressor 52. Disclosed embodiments of a fuel nozzle embodying aspects of the present invention may be incorporated incombustor 54 of the combustion turbine engine to achieve superior pre-mixing of fuel and air. - In operation and without limitation, disclosed embodiments are expected to provide a cost-effective fuel nozzle including arrays of fluid flow conduits that produce a substantially homogenous mixture of fuel and air at the outlet end of the nozzle and thus effective to produce appropriate pre-mixing of fuel and air conducive to ultra-low levels of NOx emissions. Additionally, disclosed embodiments need not involve swirler elements, and thus flashback resistance is substantially high, even for fuel blends comprising a high hydrogen content (e.g., at least 50% hydrogen content by volume).
- Without limitation, practical embodiments of the disclosed the nozzle may comprise fluid flow conduits having a minimum diameter in a range from about 0.75 mm to about 1 mm and thus capable of benefiting from relatively low-cost manufacturing technologies, such as, without limitation, three-dimensional (3D) printing, direct metal laser sintering (DLMS), etc., in lieu of presently costlier manufacturing technologies.
- While embodiments of the present disclosure have been disclosed in exemplary forms, it will be apparent to those skilled in the art that many modifications, additions, and deletions can be made therein without departing from the spirit and scope of the invention and its equivalents, as set forth in the following claims.
Claims (17)
- 21. A fuel nozzle comprising:a body having an inlet end and an outlet end and defining a central axis that extends between the inlet end and the outlet end along an axial direction of the fuel nozzle;an array of pre-mixing conduits extending between the inlet end and the outlet end of the body, the array of pre-mixing conduits circumferentially disposed about the central axis of the body, each pre-mixing conduit fluidly coupled to receive air at a respective inlet;an array of air flow conduits disposed radially inwardly relative to the array of pre-mixing conduits;means to aerodynamically reduce flow recirculation in the array of air/fuel pre-mixing conduits, wherein the means to aerodynamically reduce the flow recirculation in a respective pre-mixing conduit comprises an inter-conduit passageway arranged to provide fluid communication between the respective pre-mixing conduit and a corresponding air flow conduit; anda fuel-directing structure in the body comprising a plurality of non-swirl elements, each non-swirl element including a radially-extending passageway to direct fuel flow along a radial direction, each non-swirl element including at least one orifice to inject the fuel flow directed along the radial direction into a respective pre-mixing conduit.
- 22. The fuel nozzle of
claim 21 , wherein the array of pre-mixing conduits each comprises at least a respective pre-mixing conduit segment having a cross-sectional area that increases as the respective pre-mixing conduit segment extends from a location between the inlet end and the outlet end towards a respective outlet of the respective pre-mixing conduit. - 23. The fuel nozzle of
claim 22 , wherein the respective pre-mixing conduit segment includes at least one surface tilted radially inwardly relative to the central axis as the segment extends towards the respective outlet of the respective pre-mixing conduit. - 24. The fuel nozzle of
claim 21 , wherein the array of air flow conduits each comprises at least a respective air flow conduit segment having a cross-sectional area that decreases as the respective air flow conduit segment extends from a respective inlet towards a location between the inlet end and the outlet end. - 25. The fuel nozzle of
claim 21 , wherein the array of air flow conduits each comprises an outlet arranged radially inwardly relative to the central axis. - 26. The fuel nozzle of
claim 25 , wherein the fuel-directing structure further comprises a central passageway arranged to direct fuel along the axial direction. - 27. The fuel nozzle of
claim 26 , wherein the fuel-directing structure comprises a central outlet that in combination with the respective outlets of the array of air flow conduits forms a jet-assisted mixing stage. - 28. A combustor in a combustion turbine engine comprising the fuel nozzle of
claim 21 . - 29. A fuel nozzle comprising:a body having an inlet end and an outlet end and defining a central axis that extends between the inlet end and the outlet end along an axial direction of the fuel nozzle;an array of pre-mixing conduits circumferentially disposed about the central axis of the body, each pre-mixing conduit fluidly coupled to receive air at a respective inlet, wherein the array of pre-mixing conduits each comprises at least a respective pre-mixing conduit segment having a cross-sectional area that increases as the respective pre-mixing conduit segment extends from a location between the inlet end and the outlet end towards a respective outlet of the respective pre-mixing conduit;an array of air flow conduits disposed radially inwardly relative to the array of pre-mixing conduits, wherein the array of air flow conduits each comprises at least a respective air flow conduit segment having a cross-sectional area that decreases as the respective air flow conduit segment extends from a respective inlet towards a location between the inlet end and the outlet end; anda fuel-directing structure in the body, the fuel-directing structure comprising a plurality of non-swirl elements each including a radially-extending passageway to direct fuel flow along a radial direction, each non-swirl element including at least one orifice to inject the fuel flow directed along the radial direction into a respective pre-mixing conduit.
- 30. The fuel nozzle of
claim 29 , further comprising means to aerodynamically reduce flow recirculation in the array of pre-mixing conduits. - 31. The fuel nozzle of
claim 31 , wherein the means to aerodynamically reduce the flow recirculation in a respective pre-mixing conduit comprises an inter-conduit passageway arranged to provide fluid communication between the respective pre-mixing conduit and a corresponding air flow channel. - 32. The fuel nozzle of
claim 29 , wherein the respective pre-mixing conduit segment includes at least one surface tilted radially inwardly relative to the central axis, as the segment extends towards the respective outlet of the respective pre-mixing conduit. - 33. The fuel nozzle of
claim 29 , wherein the array of air flow conduits each comprises an outlet arranged radially inwardly relative to the central axis. - 34. The fuel nozzle of
claim 33 , wherein the fuel-directing structure further comprises a central passageway arranged to direct fuel along the axial direction. - 35. The fuel nozzle of
claim 34 , wherein the fuel-directing structure comprises a central outlet that in combination with the respective outlets of the array of air flow conduits forms a jet-assisted mixing stage. - 36. A combustor in a combustion turbine engine comprising the fuel nozzle of
claim 29 . - 37. A fuel nozzle comprising:a body having an inlet end and an outlet end and defining a central axis that extends between the inlet end and the outlet end along an axial direction of the fuel nozzle;an array of pre-mixing conduits extending between the inlet end and the outlet end of the body, the array of pre-mixing conduits circumferentially disposed about the central axis of the body, each pre-mixing conduit fluidly coupled to receive air at a respective inlet, wherein the array of pre-mixing conduits each comprises at least a respective pre-mixing conduit segment having a cross-sectional area that increases as the respective pre-mixing conduit segment extends from a location between the inlet end and the outlet end towards a respective outlet of the respective pre-mixing conduit;an array of air flow conduits disposed radially inwardly relative to the array of pre-mixing conduits;an inter-conduit passageway arranged to provide fluid communication between a respective pre-mixing conduit and a corresponding air flow conduit; anda fuel-directing structure in the body comprising a plurality of non-swirl elements, each non-swirl element including a radially-extending passageway to direct fuel flow along a radial direction, each non-swirl element including at least one orifice to inject the fuel flow directed along the radial direction into a respective pre-mixing conduit.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/US2015/023849 WO2016160010A1 (en) | 2015-04-01 | 2015-04-01 | Pre-mixing based fuel nozzle for use in a combustion turbine engine |
Publications (1)
Publication Number | Publication Date |
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US20180051883A1 true US20180051883A1 (en) | 2018-02-22 |
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ID=52997554
Family Applications (1)
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US15/555,188 Abandoned US20180051883A1 (en) | 2015-04-01 | 2015-04-01 | Pre-mixing based fuel nozzle for use in a combustion turbine engine |
Country Status (3)
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US (1) | US20180051883A1 (en) |
EP (1) | EP3278030A1 (en) |
WO (1) | WO2016160010A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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EP4230913A1 (en) * | 2022-02-18 | 2023-08-23 | General Electric Company | Combustor fuel assembly |
US20230296252A1 (en) * | 2022-03-21 | 2023-09-21 | Doosan Enerbility Co., Ltd | Combustor nozzle, combustor, and gas turbine including the same |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP7023036B2 (en) | 2018-06-13 | 2022-02-21 | 三菱重工業株式会社 | Gas turbine fuel nozzles and combustors and gas turbines |
EP3988845B1 (en) | 2020-09-30 | 2024-02-14 | Rolls-Royce plc | Direct fuel injection system |
USD950012S1 (en) * | 2020-12-01 | 2022-04-26 | Dynomite Diesel Products | Fuel injector nozzle |
US20230003385A1 (en) * | 2021-07-02 | 2023-01-05 | General Electric Company | Premixer array |
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US2565843A (en) * | 1949-06-02 | 1951-08-28 | Elliott Co | Multiple tubular combustion chamber |
DE2950535A1 (en) * | 1979-11-23 | 1981-06-11 | BBC AG Brown, Boveri & Cie., Baden, Aargau | COMBUSTION CHAMBER OF A GAS TURBINE WITH PRE-MIXING / PRE-EVAPORATING ELEMENTS |
US8281594B2 (en) | 2009-09-08 | 2012-10-09 | Siemens Energy, Inc. | Fuel injector for use in a gas turbine engine |
US8752386B2 (en) | 2010-05-25 | 2014-06-17 | Siemens Energy, Inc. | Air/fuel supply system for use in a gas turbine engine |
EP2436983A1 (en) * | 2010-10-04 | 2012-04-04 | Siemens Aktiengesellschaft | Jet burner |
-
2015
- 2015-04-01 US US15/555,188 patent/US20180051883A1/en not_active Abandoned
- 2015-04-01 EP EP15717727.0A patent/EP3278030A1/en not_active Withdrawn
- 2015-04-01 WO PCT/US2015/023849 patent/WO2016160010A1/en active Application Filing
Non-Patent Citations (1)
Title |
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Lacy 8,209,986 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4230913A1 (en) * | 2022-02-18 | 2023-08-23 | General Electric Company | Combustor fuel assembly |
US20230296252A1 (en) * | 2022-03-21 | 2023-09-21 | Doosan Enerbility Co., Ltd | Combustor nozzle, combustor, and gas turbine including the same |
Also Published As
Publication number | Publication date |
---|---|
WO2016160010A1 (en) | 2016-10-06 |
EP3278030A1 (en) | 2018-02-07 |
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