CN1878986A - Device for stabilizing combustion in gas turbine engines - Google Patents
Device for stabilizing combustion in gas turbine engines Download PDFInfo
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- CN1878986A CN1878986A CNA2004800328006A CN200480032800A CN1878986A CN 1878986 A CN1878986 A CN 1878986A CN A2004800328006 A CNA2004800328006 A CN A2004800328006A CN 200480032800 A CN200480032800 A CN 200480032800A CN 1878986 A CN1878986 A CN 1878986A
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- burner
- mixing chamber
- combustion
- fuel
- chamber
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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
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- 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
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
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- 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
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/74—Preventing flame lift-off
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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
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/16—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration with devices inside the flame tube or the combustion chamber to influence the air or gas flow
- F23R3/18—Flame stabilising means, e.g. flame holders for after-burners of jet-propulsion plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2209/00—Safety arrangements
- F23D2209/20—Flame lift-off / stability
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pre-Mixing And Non-Premixing Gas Burner (AREA)
- Gas Burners (AREA)
Abstract
Disclose is a burner for a gas turbine combustor that uses a central bluff body flame holder and a quarl to shape the recirculation zone in order to stabilize the combustion process. The burner includes, among other elements, a cylindrical main body and a flame holder. The flame holder is disposed within a fuel-air mixing chamber and includes a base portion and an elongated bluff body. The base portion engages with the main body of the burner in a supporting manner and the elongated bluff body extends in an axially downstream direction from the base portion through the internal mixing chamber so as to position a combustion ignition point downstream of the internal mixing chamber. In a representative embodiment, the burner further includes a quarl device disposed adjacent to the downstream end portion of the burner main body. The quarl device defines an interior recirculation chamber and a burner exit. The interior recirculation chamber is adapted for receiving precumbustion gases from the mixing chamber and for recirculating a portion of the combustion product gases in an upstream direction so as to aid in stabilizing combustion.
Description
[technical field under the invention]
The burner that the present invention system uses about air turbine, the relevant especially burner that is suitable for stablizing engine combustion, more relevant in conjunction with spout device and utilize the burner of central bluff body flame holder with the smooth combustion process.
[prior art]
The application of air turbine has many-side, comprises generating, military affairs and commercial flight, pipeline transmission, reaches sea transport etc.In gas turbine engine, be that fuel and air are supplied with the combustion chamber, and in this fuel combination and air and with flame ignition, thereby take fire.Gas turbine engine has some technical problem underlying relevant with combustion process.These problems comprise, for example, the thermal efficiency of burner (burner/combustor), fuel and air be suitably to be mixed, the eliminating of stable, the pulse of flame and noise, reach control, the especially nitrogen oxide (NO of disposal of pollutants
X).Flame stable be refer to flame in the fixed combustion device the position with intensity so that elimination pulse and noise-decreasing and reach other purpose.
Stabilizing combustion in gas turbine engines system needs the cyclic program of combustion product (also instant heating and free radical), wherein heat and free base system pass back the upstream to the flame starting point to promote process of combustion.
At present known flame is stablely can be provided with rotational flow air (swirled air) or to give eddy flow to fuel air mixture fuel air mixture in order to promote, thereby makes combustion process stable.Thereby swirl stabilized combustion fluid system passes heat and free radical back upstream to the fuel air mixture of not combustion and burns with promotion by produce adverse current near the burner center line.
The burner of making charcoal that discloses in U.S. of people such as Monroe the 5th, 131, No. 334, the 5th, 365, No. 865 and the 5th, 415, No. 114 patents all contains gives the flameholder of eddy flow to fuel air mixture.This flameholder comprises a plurality of spaced radials and is fixed in the flabellum assembly of position on the circular element on the center fuel supply pipe.The shape of flabellum and orientation system are designed to provide the downstream of rotational flow air to fuel supply pipe.
Generally speaking the 5th, 477, No. 685 patents of the U.S. that are contained in this Samuelson as a reference are to disclose the swirl stabilized lean burn syringe (lean burninjector) that is used for the air turbine burner.Exemplify in the specific embodiment in it, fuel air mixture leaves the nozzle that is positioned at central authorities via a plurality of radially the outlet.One air cyclone and a quarl device are attached to the downstream of the wrong gloomy syringe of Sa (Samuelson injector) to promote recirculation flow.With the fuel air mixture system of radially leaving nozzle with because of air cyclone so meet with the air of the axial conduct syringe of spiral path.Spout device is to be used in Industrial Boiler and stove to strengthen and to change the shape of the hot combustion product of recirculation.
Utilize the conventional burners of eddy flow, for example go up the those shown, enough swirl strengths need be arranged so that recycle to such an extent that near center line, produce, shown in the 1st figure with smooth combustion.As above-mentioned, in swirl stabilized burning, when the heat in the combustion process generation upstream is transmitted back to recirculation zone with free radical and mixes with the fuel air mixture of unreacted still and when taking fire, burning side stablizes.The stability series utmost point of burning is dependent on the recirculation that these hot combustion products are back to the upstream.Moreover when the speed increase of recycle burning product, the flux of the combustion product of the heat of upstream and chemistry work also increases, and combustion process will be tending towards more stable in wider operating conditions.
Swirl strength has intense influence to the size of hot combustion product recirculation zone, shape and intensity.Swirl strength is weighed it with a dimensionless quantity number (nondimensional number), and it is defined as the ratio of the axial flux of angular momentum to the axial flux of axial momentum.Usually, swirling number was less than 0.4 o'clock, and recirculation zone can't produce.When increasing, can cause swirling number in the stagnation pressure reduction of preceding stagnation point.Shown in the 1st figure, preceding stagnation point be combustion product upstream flow along center line with from burner air downstream axial flow junction part, be all zero in all speed herein.Typically, swirling number can produce a low-pressure area in preceding stagnation point greater than about 0.6 o'clock.This low pressure fauna make combustion product by the higher burner downstream of burner internal pressure upstream flow to pressure reduce before stagnation point.This forms mechanism (seeing the 1st figure) for causing main recirculation zone.
Increase swirling number (S
n) tend to lower before stagnation pressure and increase the upstream recirculation rate of nearly center line.The upstream flow of the combustion product of this increase system has increased and has flow to the hot gas that can open stagnation point before the beginning active combustion and the flux of chemically reactive substance.(0.4＜S just when swirling number is low
n＜0.6), the pressure of the preceding stagnation point pressure of stagnation point behind the recirculation zone only.Thereby, passed back the heat of upstream and the low and instability of burning of flux of chemism combustion product, especially more right when burning is thin.
Swirling number has other influence to recirculation zone.For example, S
nIncrease will lower and further toward a upstream in the low-pressure of preceding stagnation point and a back stagnation point and make recirculation zone shorter.Moreover, with S
nIncrease and the circumferential force of increase, also cause the enlarged-diameter of recirculation zone.
Spout device is to be used in Industrial Boiler and the stove to lower the influence of swirling number size to recirculation zone length and diameter.Spout device is also allowed in not increasing S
nFollowing to the diameter of the enlarged-diameter of recirculation zone to the spout device outlet.Moreover when using spout device, recirculation zone length is more insensitive to swirling number, and presents the length that is about 2 to 2.5 times of spout device outlet diameters.
Spout device is allowed the high S of use
nAnd the recirculation zone of unlikely generation major diameter.Yet the burner that uses spout device is when strong swirl strength, and flame tends to upstream move and gos deep into burner in and then the part of damage burner.Moreover when burning is initiated at lean side on the stoichiometry, denseer mixture will increase flame speed.The increase of this flame speed also impel flame further up the trip move in the burner.Except that the hardware of damaging burner, go deep in the burner and uncontrolled flame moves the discharging that more can cause high nitrogen oxide.
In addition, when the fuel/air mixture ratio changed, it is great that stability problem can become.When thin premixed combustion became very thin, it is very responsive that the change that flame speed compares fuel/air mixture becomes.The flame speed that continues variation often causes the displacement of flame location and causes the vibration and the noise of combustion pressure.
In flame enters burner, cause the fuel/air mixture ratio Shi Yineng that thickens combustion instability is taken place, and flame is more goed deep in the burner.Denseer fuel/air mixture is than being that mat lowers swirl strength and offsets on the typical case.Yet this will cause the cyclic process of flame turnover burner.This universal instability problem can cause the very pulse of high pressure and the rising of discharged nitrous oxides.This unstability belongs to typical low frequency instability, usually between 80 to 150 hertz (Hz).The amplitude of its pressure pulse can be disruptive to gas turbine engine up to 0.1 crust (bar).Moreover, during the dense unstable cyclic part that burns, can produce a large amount of nitrogen oxide.
The shortcoming of known techniques needs a kind of burner through improvement in fact in view of the above, and it is stable that it not only promotes flame, the also discharging of the pulse that can reduce pressure, noise and nitrogen oxide.
[summary of the invention]
The burner that the relevant a kind of air turbine burner of the application's case system is used, it utilizes central bluff body flame holder and spout device with the smooth combustion process.This burner comprises cylindrical body, device in the flame and other assembly.
This main burner body comprises axially relative upstream and downstream end, at least one fuel inlet channel and at least one air intake channel form wherein.Fuel and air intake channel are to build to be set to respectively fuel supplying and air to being formed at the downstream end mixing chamber.Mixing chamber has and a plurality ofly is formed at the surface at its inside and hoop interval so that make the fuel that is supplied to mixing chamber with air generation eddy flow and mix.
The system of device in the flame is disposed in the mixing chamber, comprises pedestal part and long bluff body.Pedestal part system is connected burner body with supporting way, and long bluff body then extends the combustion ignition point is placed the downstream part of internal mix chamber with the axial downstream direction through the internal mix chamber from pedestal part.
Burner also comprises the spout device that adjoins downstream end.Quarl device defines interior recirculation chamber and burner outlet.Interior recirculation chamber is to be set as in order to receive from gas before the burning of mixing chamber and the combustion product gas that is used to updrift side recirculation portion branch to stablize so that auxiliary combustion is.
The bluff body system of imagination device in the flame places the mixing chamber center, and has a taper upstream zone and an essence cylinder cusp field.Under the ideal state, the axial length of device in the flame is to reach the S greater than about 0.6
nAnd design.Swirling number is the ratio of tangent line momentum to axial momentum, its be definition flow through burner and the combustion air amount of rotating to leave the ratio of the combustion air amount of burner with the axial flow condition.The mathematical definition of swirling number is found in the 5th, 365, No. 865 patents of the U.S. of Monroe, and generally speaking its definition is to be incorporated in this.
In a demonstration specific embodiment, have at least air intake channel system to form with in fact radially inside direction, fuel then enters the mixing chamber of main body with axial direction in fact.Under the ideal state, air system enters air intake and eddy flow is added all air by burner with the direction of tangent line and radial inward, and this is that design is in order to reach the S greater than about 0.6
n
The personage who has the knack of this type of skill can understand combustion chamber or the burner that the present invention can be applicable to any form, for example solid fuel burner or stove immediately.
[embodiment]
Know this technical staff and will understand above-mentioned and other feature of the burner of the application's case easily by the detailed description of following preferred embodiment.In following reference was graphic, the similar framework of the present invention all identified with similar element numbers.In the 2nd figure, the general system of the burner that the air turbine burner is used is denoted as element numbers 100.Burner 100 is to use central bluff body flame holder 20 and spout device 80 with the smooth combustion process.Burner 100 comprises cylindrical body 50, device in the flame 20, spout device 80 and other assembly.Main body 50 and device in the flame 20 can be attached mutually with traditional approach, or are retained on together in the close-fitting mode, or mechanically chain firmly.
Fuel and air intake channel 56 and 58 are to build up with putting with fuel supplying and air respectively to the mixing chamber 60 that is formed at downstream end.Mixing chamber 60 has a plurality of surface 62 or turbine leaves that are formed at its inside and hoop interval, in order to the fuel and the air that are supplied to mixing chamber 60 are given swirling motion and given mixing chamber.
Device in the flame 20 is to place in the mixing chamber 60, contains a pedestal part 22 and a long bluff body 24.Pedestal part 22 is the main body 50 that is connected burner 100 with supporting way, long bluff body 24 then from pedestal part 22 through internal mix chamber 60 with the extension of axial downstream direction so that combustion ignition point (combustion ignition point) or preceding stagnation point (forward stagnation point) 75 (referring to the 3rd figure) are placed the downstream part of internal mix chamber 60.Long bluff body 24 still has a plurality of to be formed at the post groove 27 that its surface is outer and extend axially, with the scale of turbulent flow in the definition burner 100.
The bluff body part 24 of device in the flame 20 is to place mixing chamber 60 centers and a taper upstream zone 26 is arranged and have one radially to amplify trip neck regions 28 under the head.The shape of neck regions can be set as with further recirculation that improves combustion product and flame stable.Sun selects the axial length of device in the flame 20 so that with greater than about 0.6 but be not more than 2.0 swirling number and come the grappling recirculation zone.As previously mentioned, swirling number is to be defined as the combustion air amount of rotation of the burner of flowing through to leave the ratio of the combustion air amount of burner with the axial flow condition.
In fact device in the flame 20 stops flame to enter mixing chamber 60 along burner 100 center line backfire.Enter mixing chamber 60 by stoping along the center line backfire, fuel-air mixture can have the swirl component of higher tangential direction.Increasing swirl strength and not having backfire is to make spout device more efficient when strengthening towards the upstream recirculation of hot gas, and makes whole combustion process more stable.The heat re-circulated that increases upstream can make thinner fuel-air mixture flameholding.This will provide bigger elasticity and robustness in engine operation, keep low engine emissions simultaneously.
Keeping little recirculation zone is of value to the chemism that keeps hot combustion gas, and allows that faster Yu more stable burning is initial, and especially in low combustion temperature, this often occurs in low NOx NO
X(nitric oxide NO and nitrogen dioxide NO
2) when engine is lower than 1700K.Raise and ignition temperature decline with combustion pressure, the low residence time in recirculation becomes more important to the chemism combustion product.Under high pressure, chemically-reactive substance (or claim free radical that quick incipient combustion is benefited to some extent) is to releive apace to balanced level under affected by high.The life-span that is higher than the free radical of balanced level shortens with the increase of pressure.When ignition temperature low, for example in low NO
XIn the engine, be that balanced level is lower during based on low temperature because of freedom, apparent more important to effectively utilizing of the high lack of balance level of these free radicals.
The 3rd figure is the sectional view of swirl stabilized combustion device 100, and its recirculation of describing the past upstream of combustion product is to keep combustion process.The upstream of burner 100 and downstream are its reference marker with " U " and " D " respectively.As shown in the figure, the flowing of combustion product is separated into the zone of difference, just main recirculation zone 90 and outer recirculation zone 92.
As previously mentioned, the general system of moving program is used to smooth combustion so that combustion product is up vacillated to make fuel-air mixture eddy flow.In the burner 100 of announcement, bluff body flame holder 20 is anchored to a fixed position to main recirculation zone 90.The combustion initiation point 94 of flame front or premix fluid is that the surface produces outside the main recirculation zone 90, in outer surface, and hot and free base system mixes and initial unreacted is crossed premixed fuel and air.Flame originate in device in the flame 20 end and toward downstream side to being extended to cone shape.
Even the ratio of fuel-air mixture has very remarkable change, burner 100 is still kept the end 24 of the position of flame in device in the flame 20.When thin premixed combustion became very thin, flame speed became very responsive to the fuel/air mixture ratio.The change of this flame speed often causes the displacement of flame location, and may cause the vibration of combustion pressure.By coming the grappling flame location with center bluff body flame holder 20 and avoiding flame to move, can prevent the vibration of pressure.
The sectional view system explanation of the burner 100 that 4a figure is provided is anchored to the conical flame 98 of device in the flame 20.4b to 4d figure is depicted as the burner 200 that does not contain center body flame holder.In burner 200, strong when swirl strength, or the fuel/air mixture ratio of premix is when dense, and flame 298 tendencies move and go deep in it toward burner, shown in 4b figure.When burning is lean side on the stoichiometry, make that mixture is denseer will to increase flame speed.It is moving that the flame speed of increase can make flame further up vacillate.Increasing swirl strength also can produce and make the flame moving same tendency of further up vacillating.Do not wish that generally flame 298 enters in the burner mixed zone 260, shown in 4b figure.Go deep in the burner 200 and uncontrolled flame moves the discharging that can damage the hardware of burner and cause high nitrogen oxide.Install the end that center bluff body flame holder 20 stagnation point 96 before the spout device modified burner can be main recirculation zone 90 is anchored to device in the flame 20 additional, enter mixing chamber 60 to prevent main recirculation zone 90 and flame.For stagnation point 96 before can ordering about originally go deep in the burner 100 or towards outlet 84 or even all swirl strengths of burner outside, center bluff body flame holder is the end of preceding stagnation point 96 (referring to the 3rd figure) being fixed in device in the flame 20.Hereat, center bluff body flame holder 20 is anchored to single position to preceding stagnation point 96 and flame 198 it is unlikelyly ceaselessly moved with the change of swirl strength.
Center bluff body flame holder 20 has an optimum position, and in this, swirling number can increase and decrease in the same manner and preceding stagnation point 96 continues to depend on the device in the flame 20 with flame 198.If swirl strength continues to successively decrease, flame 198 jumps out of device in the flame and is stable at the downstream quite at a distance or outside burner outlet 84 until last flame continuing to depend on device in the flame 20.From identical optimum swirl number and center bluff body flame holder position, increasing swirl strength can not influence flame location, and until in a certain critical swirl strength the time, flame location is jumped 20 ends of device in the flame that swallow up toward the upstream in the main recirculation zone.As long as operating condition remains in the zone of reasonableness that swirl strength and fuel/air mixture compare, flame location will stay put, and will be as the same even engine conditions changes to some extent.These scopes have proved that system is quite big, and this is the positive characteristic of burner 100.
The mobile of flame location is a significant problem for the combustion system of operating with very thin condition.Is to produce in the thinnest fuel/air mixture ratio and/or minimum swirl strength in 4c figure with the flame 198 shown in the 4d figure.When burning was very thin, it is very unstable that swirl stabilized combustion can become.Yet, lower NO
XBurning is thin to be brought down below diatomic nitrogen and oxygen (N to flame temperature in order to make to discharge the method for tool effect
2With O
2) decompose and be combined into NO and NO again
2Temperature.If the air and the fuel mix of nearly twice are arranged before fuel and air mixture burning, the air that has more is then as the inert material of burned process heating.As long as have abundance or more air to supply with combustion process, the energy size of combustion process release is only to be decided by the fuel quantity that burns.Exceed the size that the required air of burning does not influence combustion process and released energy, but then remain unchanged the temperature of flame and combustion product thereby attenuating in the energy of release because of the binding capacity system increase of fuel and air.The attenuating of flame temperature also reduces NO
X(NO and NO
2) synthetic.These are several to be present all low NO
XThe principle of the gas turbine engine foundation of discharging.
As above-mentioned, installing center bluff body flame holder 20 additional is to allow the increase of swirl strength and do not cause flame to flash back in the mixing chamber 60 in burner 100.The ability system order that increases swirl strength increases the adverse current that hot combustion product is back to the upstream.It is that more heat and free radicals are provided that the increase of hot combustion product is flowed, and makes burning more sturdy and difficult unstable.
If flame front is begun outward by burner, at the fixed pressure drop across burner, burner will have a maximum airflow rate.If some disturbance causes flame to jump in the burner, will reduce through the air mass flow rate (mass flow rate) of burner, this is that heat because of the combustion process generation will make the volume flow rate that air is expanded to be increased through burner outlet.This increase at the volume flow rate of fixed pressure drop will cause the minimizing through the air mass flow rate of burner.For most of gas turbine engine, use 6 to 100 burners calmly according to the power rating of engine.If flame is jumped into some burner, but non-whole, then have the burner of flame and will burn stronglyer in inside.This is on average to supply with each burner because of identical fuel system via the common fuel menifold.Because the burning of burner outlet inside causes the volume flow rate increase and causes air mass flow rate to reduce, so flame burns denselyer in interior burner.When burning is initially when thin, the result of denser burning is for increasing flame speed.The increase system of flame speed allows that flame more gos deep in the burner.This will increase the also extra minimizing air mass flow rate of volume flow rate and make burning more dense.In case enter inside, flame might rest in some burners, rests on simultaneously outside other burner.If this generation, when the turbine inlet that enters corresponding to denser burner, will cause high NO
XAnd focus appears.
Combustion process in burner also will influence the characteristic of eddy flow, and it can cause the reverse of the previous program in the burner that flame is drawn in.In the time of in flame is drawn into burner, the mass flowrate of air will reduce.Atmospheric density by cyclone does not change and causes the lower speed and the attenuating of swirl strength.Stagnation point was down vacillated moving before the attenuating of swirl strength easily made main recirculation.Combustion process itself also has the tendency that lowers swirl strength, and this is the flow that enlarges all directions because of combustion process system fifty-fifty.Can cause instability when causing the fuel/air mixture ratio to thicken in flame moves into burner, this will make flame more go deep in the burner.Offsetting the denseer fuel/air mixture ratio that produces higher flame speed is the decline of swirl strength.This will form the cyclic process of flame turnover burner.And this universal instability problem can cause the very pulse and the NO of high pressure
XThe rising of discharging.This unstability is general low frequency instability, usually between 80 to 150 hertz.The amplitude of its pressure pulse can reach the pressure oscillation of 0.1 crust and be disruptive to gas turbine engine.Moreover, in the dense cyclic part that burns, can produce a large amount of NO
XUsing center bluff body flame holder is to make flame location insensitive for the change that swirl strength and fuel/air mixture compare in the invention based on the burner of spout device, and allows the fixed position of flame stabilization in the end of device in the flame.So can eliminate and lead because of the pressure oscillation of moving and the NO of rising in flame
XDischarging.
The present invention encyclopaedizes to preferred embodiment, the personage who has the knack of this skill can understand utilization easily and hold within disclosed and can do different changes and/or modification,, and unlikely disengaging such as appended the present invention's that claim defined spirit and technology category.
Swirling number is the ratio of tangent line momentum to axial momentum, and the combustion air flow that its definition is rotated through burner leaves the ratio of the combustion air flow of burner for flowing vertically.
[icon simple declaration]
Know for making the personage of technology can know from experience how to make and use the application's case immediately under the application's case, can be with reference to following graphic:
The 1st figure is the cross-sectional perspective view of the swirl stabilized combustion device of known techniques;
The 2nd figure is the cross-sectional perspective view that the present invention contains the swirl stabilized combustion device of bluff body flame holder;
The 3rd figure is the sectional view of the 2nd figure burner, the eddy flow of its explanation in burner flows, before the main recirculation zone stagnation point grappling and in the flame front on center bluff body flame holder side;
4a figure is the sectional view according to the burner of the present invention's preferred embodiment institute construction, and its explanation flame stabilization is in center bluff body flame holder;
4b figure is the sectional view of burner of the no center bluff body flame holder of known techniques, and its explanation flame is in the backfire position;
4c figure is the sectional view of 4b figure burner, and its explanation flame is positioned at the burner downstream end, nearly outlet; And
4d figure is the sectional view of 4b figure burner, and its explanation flame is positioned at outside the burner outlet.
[element numbers simple declaration]
100 burners, 198 flames
20 devices, 22 pedestal part in the flame
24 bluff bodies, 26 upstream tapered segment
27 post grooves, 28 downstream neck regions
200 burners, 260 mixed zones
298 flames
End, 50 main bodys, 52 upstream
54 downstream ends, 56 fuel inlet channels
58 air intake channels
60 mixing chambers, 62 surfaces or turbine leaf
Stagnation point before 75
80 spout devices, 82 recirculation chamber
90 main recirculation zone 92 outer recirculation zone
94 combustion initiation point, 98 conical flames
Claims (20)
1. the burner of gas turbine (gas turbine) combustion chamber (combustor) usefulness comprises:
A) cylindrical body, have in axial relative upstream and downstream end, this main body has at least one fuel inlet channel and formation at least one air intake channel wherein, these channels are applicable to that fuel supplying and air are to the mixing chamber that is defined in downstream end respectively, and this mixing chamber is configured to make the fuel that is supplied to mixing chamber to produce eddy flow with air and it is mixed; And
B) flameholder (flame holder), be disposed in this mixing chamber, and comprise the pedestal part that engages with burner body, and from pedestal part through the internal mix chamber vertically downstream direction extend with the long bluff body (elongated bluff body) of control the position in combustion ignition point downstream, internal mix chamber.
2. burner as claimed in claim 1 also comprises:
Spout (quarl) device, the downstream end that is adjacent to burner body is arranged, this spout device defines interior recirculation chamber and burner outlet, this interior recirculation chamber is applicable to pre-burning (precombustion) gas of reception from mixing chamber, and along the combustion product gas of updrift side recycle sections, with auxiliary smooth combustion.
3. burner as claimed in claim 1, wherein, the bluff body of this flameholder is disposed at the axial centre place in the mixing chamber.
4. burner as claimed in claim 1, wherein, this flameholder bluff body has tapered zone.
5. burner as claimed in claim 1, wherein, this flameholder bluff body has the cusp field that radially amplifies.
6. burner as claimed in claim 1, wherein, the axial length of this flameholder is set as in order to reach the swirl number per min greater than about 0.6.
7. burner as claimed in claim 1, wherein, this at least one air intake channel is along the direction formation of radial inward in fact.
8. burner as claimed in claim 1, wherein, fuel edge axial direction in fact enters the mixing chamber of main body.
9. burner as claimed in claim 1, wherein, this at least one the fuel inlet channel that is formed at burner body comprises the spire that is used for giving angular momentum to fuel.
10. burner as claimed in claim 1, wherein, this flameholder bluff body has many and is formed at its outer surface and axially extended groove (flute).
11. the burner of gas turbine (gas turbine) combustion chamber (combustor) usefulness comprises:
A) cylindrical body, have in axial relative upstream and downstream end, this main body has at least one fuel inlet channel and formation at least one air intake channel wherein, these channels are applicable to that fuel supplying and air are to the mixing chamber that is defined in downstream end respectively, and this mixing chamber is configured to make the fuel that is supplied to mixing chamber to produce eddy flow with air and it is mixed; And
B) flameholder is disposed in this mixing chamber, and comprise the pedestal part that engages with burner body, and from pedestal part through the internal mix chamber vertically downstream direction extend long bluff body with the position in control combustion ignition point downstream, internal mix chamber; And
C) spout (quarl) device, the downstream end that is adjacent to burner body is arranged, this spout device defines interior recirculation chamber and burner outlet, this interior recirculation chamber is suitable for receiving from mixing chamber pre-burning (precombustion) gas, and along the combustion product gas of updrift side recycle sections, with auxiliary smooth combustion.
12. burner as claimed in claim 11, wherein, the bluff body of this flameholder is disposed at the axial centre place in the mixing chamber.
13. burner as claimed in claim 11, wherein, this flameholder bluff body has tapered zone.
14. burner as claimed in claim 11, wherein, this flameholder bluff body has the cusp field that radially amplifies.
15. burner as claimed in claim 11, wherein, the axial length of flameholder is suitable for making the swirl number per min of main recirculation to be stabilized in about 0.6 and about 2.0 scopes.
16. burner as claimed in claim 11, wherein, this at least one air intake channel is along the direction formation of radial inward in fact.
17. burner as claimed in claim 11, wherein, fuel edge axial direction in fact enters the mixing chamber of main body.
18. burner as claimed in claim 11, wherein, this at least one the fuel inlet channel that is formed at burner body comprises the spire that is used for giving angular momentum to fuel.
19. burner as claimed in claim 11, wherein, this flameholder bluff body has many and is formed at its outer surface and axially extended groove (flute).
20. the burner of gas turbine (gas turbine) combustion chamber (combustor) usefulness comprises:
A) cylindrical body, have axially relative upstream and downstream end, this main body has at least one fuel inlet channel and formation at least one air intake channel wherein, these channels are applicable to respectively fuel supplying and air to the mixing chamber that is defined in downstream end, and the fuel that this mixing chamber is configured to be supplied to mixing chamber produces eddy flow and it is mixed with air; And
B) be disposed in the mixing chamber and be used for the device of position that will control internal mix combustion ignition point downstream.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US50051703P | 2003-09-05 | 2003-09-05 | |
| US60/500,517 | 2003-09-05 | ||
| PCT/US2004/028768 WO2005040682A2 (en) | 2003-09-05 | 2004-09-03 | Device for stabilizing combustion in gas turbine engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1878986A true CN1878986A (en) | 2006-12-13 |
| CN1878986B CN1878986B (en) | 2010-04-28 |
Family
ID=34519984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2004800328006A Expired - Fee Related CN1878986B (en) | 2003-09-05 | 2004-09-03 | Device for stabilizing combustion in gas turbine engines |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20050106520A1 (en) |
| EP (1) | EP1668295A2 (en) |
| JP (1) | JP4767851B2 (en) |
| KR (1) | KR101178195B1 (en) |
| CN (1) | CN1878986B (en) |
| BR (1) | BRPI0413966A (en) |
| CA (1) | CA2537949C (en) |
| RU (1) | RU2407950C2 (en) |
| WO (1) | WO2005040682A2 (en) |
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| CN104896510A (en) * | 2015-05-13 | 2015-09-09 | 广东电网有限责任公司电力科学研究院 | Flame holder and ground gas turbine combustion chamber with same |
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- 2004-09-03 BR BRPI0413966-6A patent/BRPI0413966A/en not_active Application Discontinuation
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- 2004-09-03 US US10/933,887 patent/US20050106520A1/en not_active Abandoned
- 2004-09-03 RU RU2006110986/06A patent/RU2407950C2/en not_active IP Right Cessation
- 2004-09-03 EP EP04809669A patent/EP1668295A2/en not_active Withdrawn
- 2004-09-03 JP JP2006525479A patent/JP4767851B2/en not_active Expired - Fee Related
- 2004-09-03 WO PCT/US2004/028768 patent/WO2005040682A2/en active Application Filing
- 2004-09-03 KR KR1020067004626A patent/KR101178195B1/en not_active IP Right Cessation
- 2004-09-03 CA CA2537949A patent/CA2537949C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032576A (en) * | 2009-10-08 | 2011-04-27 | 通用电气公司 | Staged multi-tube premixing injector |
| CN102032576B (en) * | 2009-10-08 | 2013-10-23 | 通用电气公司 | Staged multi-tube premixing injector |
| CN103292349A (en) * | 2012-02-27 | 2013-09-11 | 通用电气公司 | Combustor and method for purging a combustor |
| CN103292349B (en) * | 2012-02-27 | 2016-09-21 | 通用电气公司 | Burner and the method for blowing burner |
| CN103672891A (en) * | 2012-08-31 | 2014-03-26 | 阿尔斯通技术有限公司 | Premix burner |
| CN103672891B (en) * | 2012-08-31 | 2016-10-05 | 通用电器技术有限公司 | Premix burner |
| CN106460676A (en) * | 2014-05-05 | 2017-02-22 | 西门子公司 | Method for operating a burner assembly |
| CN106460676B (en) * | 2014-05-05 | 2018-05-08 | 西门子公司 | Method for running burner |
| CN104896510A (en) * | 2015-05-13 | 2015-09-09 | 广东电网有限责任公司电力科学研究院 | Flame holder and ground gas turbine combustion chamber with same |
| CN104896510B (en) * | 2015-05-13 | 2017-02-01 | 广东电网有限责任公司电力科学研究院 | Flame holder and ground gas turbine combustion chamber with same |
| CN109668172A (en) * | 2018-12-10 | 2019-04-23 | 中国航天空气动力技术研究院 | A kind of high-speed fuel oil mixing machine of controllable pulsed eddy |
| CN111520750A (en) * | 2020-03-25 | 2020-08-11 | 西北工业大学 | Novel combustion chamber head oil injection structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4767851B2 (en) | 2011-09-07 |
| KR101178195B1 (en) | 2012-08-30 |
| EP1668295A2 (en) | 2006-06-14 |
| RU2407950C2 (en) | 2010-12-27 |
| WO2005040682A2 (en) | 2005-05-06 |
| RU2006110986A (en) | 2006-07-27 |
| CA2537949C (en) | 2011-01-11 |
| KR20060086358A (en) | 2006-07-31 |
| US20050106520A1 (en) | 2005-05-19 |
| JP2007504429A (en) | 2007-03-01 |
| BRPI0413966A (en) | 2006-10-31 |
| WO2005040682A3 (en) | 2005-08-11 |
| CN1878986B (en) | 2010-04-28 |
| CA2537949A1 (en) | 2005-05-06 |
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