CN104896510A - Flame holder and ground gas turbine combustion chamber with same - Google Patents
Flame holder and ground gas turbine combustion chamber with same Download PDFInfo
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- CN104896510A CN104896510A CN201510242234.1A CN201510242234A CN104896510A CN 104896510 A CN104896510 A CN 104896510A CN 201510242234 A CN201510242234 A CN 201510242234A CN 104896510 A CN104896510 A CN 104896510A
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Abstract
The invention discloses a flame holder and a ground gas turbine combustion chamber with the same. The flame holder comprises a central ring and a plurality of radial struts fixed on the outer circular face of the central ring along the radial direction uniformly. A ring body of the central ring and the radial struts are formed by members in groove structures, and groove opening directions of the central ring and the radial struts are identical. Gas flow channels are formed in the members in groove structures and are communicated with the outside through a plurality of gas spray holes in the bottoms of the grooves. The gas flow channel in the central ring and the gas flow channels in the radial struts are communicated to form a gas flow cavity with the shape corresponding to the shape of the flame holder. By means of the flame holder, fuel gas can be burnt stably on the flame holder even under the impact of high-speed gas flows.
Description
Technical field
The present invention relates to gas turbine field, in particular to a kind of flameholder, also relate to a kind of ground combustion machine combustion chamber being provided with this flameholder.
Background technology
Along with the environmental consciousness of people is generally strengthened, countries in the world have worked out pollution regulations (method) all accordingly, the pollutant effulent of various combustion apparatus and power set are proposed to the restriction of increasingly stringent.Although twentieth century has had the regulation of international law during the eighties to the nineties, many national sulfur dioxide (SO are made
2) discharge capacity obviously reduce, but nitrogen oxide (NO
x) reduction is relatively less.NO
xday by day become the key of various countries' pollution emission control, because it is the key pollutants of compound pollution, and a series of environmental problem can have been brought.Dry low NOx (DLN) combustion technology is the Zeldovich generating principle according to thermal NO x, by combustor primary zone temperature restraint in the narrow range of 1670-1900K to reduce discharging NOx, therefore must adopting premixed combustion mode, controlling flame temperature by regulating the fuel/air mixture equivalent proportion in primary zone.But only control average equivalent ratio can't meet the demands, all DLN combustion chambers all require the even premix of fuel/air mixture.The research and development of advanced DLN combustion chamber all take very large energy on fuel/air premix homogeneity question in the world.
Fig. 1 is the structural representation of existing general dry type low-nitrogen oxide discharging combustion chamber, and as shown in Figure 1, combustion barrel is located in combustion chamber, and the inlet end of combustion barrel is provided with end plate, end plate is fixed with cyclone on duty and 8 main cyclone devices around cyclone on duty.Cyclone is made up of whirl cylinder 4,5 and blade 41,31, and blade 41,31 is arranged around the centre bore at middle part.The centre bore of main combustion stage jet pipe 1 in the middle part of main cyclone device blade 41 penetrates main cyclone cylinder 4, and the centre bore of level jet pipe 3 on duty in the middle part of swirler blades 31 on duty penetrates whirl cylinder 5 on duty.Main cyclone cylinder 4 afterbody is restrained, whirl cylinder 5 afterbody expansion on duty.
In order to strengthen degree of mixing and prevent tempering, main cyclone cylinder 4 afterbody devises converging portion, to accelerate unreacted fuel gas stream.But so design makes again, in the suitable segment distance in its downstream, can not catch fire, waste the bags, and add the time of staying of combustion gas in combustion chamber, increase the generation of pollutant because air velocity is too high.
Summary of the invention
First technical problem to be solved by this invention is to provide a kind of flameholder, and this flameholder can make the flame stabilization on it burn.
The present invention is solved the problems of the technologies described above by following technological means: a kind of flameholder, it is characterized in that, several radial strut comprising center ring and be radially fixed on equably on center ring outer ring surface, ring body and the described radial strut of described center ring are all made up of the component of channel-shaped structure, and described center ring is identical with the notch direction of described radial strut, gas channel is provided with in the component of described channel-shaped structure, multiple fumaroles that described gas channel is arranged by bottom land are in communication with the outside, gas channel in described center ring and described radial strut communicates with each other, form the air flow chamber that a shape is corresponding with described flameholder.
After combustion gas inputs described air flow chamber, from the fumarole ejection at the bottom of described member slots, with combustion-supporting gas as air has contacted burning, the component of channel-shaped structure well can stop the impact of external air flow, makes combustion gas can realize smooth combustion in flameholder.
The free end of described radial strut is all connected with the inner ring surface of a connecting ring, to strengthen the mechanical strength of whole flameholder.
Second technical problem to be solved by this invention is to provide a kind of ground combustion machine combustion chamber with described flameholder, described combustion chamber comprises combustion barrel, the inlet end of described combustion barrel is provided with cyclone on duty and several main cyclone devices around described cyclone on duty, it is characterized in that, described flameholder is also provided with in described combustion barrel, described flameholder is fixed on the downstream of described cyclone by its radial strut or connecting ring, the quantity of described radial strut is corresponding with the quantity of described main cyclone device, gap between each described main cyclone device with adjacent two described radial strut is relative, described combustion barrel also comprises Gas Pipe, described Gas Pipe puts in combustion barrel inside from the inlet end of described combustion barrel and is connected with described flameholder, and be communicated with the air flow chamber of described flameholder.
Distance range between described flameholder and described main cyclone device is 20 ~ 40mm.
The ring body of the center ring of described flameholder is relative with the nozzle that the whirl cylinder on duty of described cyclone on duty is expanded, described main cyclone device blade center hole is relative with the middle part in the gap between radial strut described in adjacent two, is convenient to reduce the resistance of flameholder to main transverter and transverter downstream airflow on duty.
The quantity of the fumarole in each described radial strut is 1 or 2, is distributed in the middle part of described radial strut; The quantitative range of the fumarole on described center ring is 10 ~ 20, is uniformly distributed; The diameter range of described fumarole is 0.9mm ~ 1.5mm.
As a further improvement on the present invention: described in several, the whirl cylinder of main cyclone device is connected as a single entity, form a loop configuration, be made up of the external annulus of alternate setting and internal ring wall, described external annulus and internal ring wall are connected together by some pieces of connecting plates between them, the blade of each main cyclone device is located in the gap between two connecting plates correspondingly, described external annulus is mutually close with the afterbody of described internal ring wall, form the converging portion of main cyclone cylinder, the converging portion of each main cyclone device communicates with each other, namely be not connected block to separate, described internal ring wall is connected with the whirl cylinder on duty of described cyclone on duty, be integrated on the inwall that described external annulus is fixed on described combustion barrel or with the inwall of described combustion barrel.
As the preferred embodiment of the present invention: be axially arranged with several fins inside described external annulus, there is in fin the through hole that runs through its both ends of the surface, described Gas Pipe is passed from the through hole of described fin, be connected with the radial strut of described flameholder nearby, described contiguous block is fixed on described fin one to one.
Relative to prior art, the present invention has following beneficial effect:
1) owing to increasing gas injection exit point, (spray site is no longer limited to main combustion stage jet pipe and level jet pipe on duty in the present invention, multiple fumaroles on flameholder also constitute gas injection exit point), be conducive to making combustion gas and air mixedly more even, thus be conducive to the appearance eliminating localized hyperthermia's point, make burning more abundant;
2) the present invention is by arranging flameholder, a part of combustion gas is directly sent into flameholder, by the multiple fumarole ejections on flameholder, due to the design feature of flameholder itself, even if under the impact of cyclone downstream high velocity air, combustion gas also can smooth combustion on flameholder, thus combustion gas can be burnt at combustion barrel head; In addition, because flameholder of the present invention is to the shunting action of main combustion stage jet pipe, be conducive to the combustion gas speed reducing main cyclone device downstream, shorten the distance of combustion gas ignition point from cyclone; The whirl cylinder of main cyclone device of the present invention is connected as a single entity, and the converging portion of each main cyclone cylinder communicates with each other, and is also conducive to the speed reducing the downstream combustion gas of main cyclone cylinder, combustion gas is burnt at combustion barrel head; The present invention shortens the distance of combustion gas ignition point from cyclone, combustion gas can be burnt at combustion barrel head, be conducive to the inner space utilizing combustion barrel fully, reduce the time of staying of combustion gas in combustion barrel, reach the object of the discharge capacity of decreasing pollution thing, be also beneficial to and make the structure of combustion chamber compacter.
Accompanying drawing explanation
Fig. 1 is the sectional view of the structural representation of existing general dry type low-nitrogen oxide discharging combustion chamber;
Fig. 2 is the rearview of the flameholder of the specific embodiment of the invention;
Fig. 3 is the sectional view of the component of the channel-shaped structure of pie graph 2 Flame stabilizer;
Fig. 4 is the front view of Fig. 2 Flame stabilizer;
Fig. 5 is the sectional view of the structural representation of the combustion barrel of the specific embodiment of the invention;
Fig. 6 is the left view of combustion barrel in Fig. 5.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail:
As shown in Fig. 2 ~ 4, the quantity that the flameholder of the present embodiment comprises center ring 7, eight radial strut 6(radial strut is corresponding with the quantity of main cyclone device in combustion barrel) and connecting ring.Center ring 7 is located in the middle part of connecting ring abreast, and eight radial strut 6 are radially fixed on center ring 7 outer ring surface equably, and free end is connected with the inner ring surface of connecting ring.
Ring body and the radial strut 6 of center ring 7 are all made up of the component of channel-shaped structure.As shown in Figure 3, the component of channel-shaped structure is made up of upper and lower two arcwall faces, and two arcwall face both sides overlap, and middle formation cavity, forms gas channel.As shown in Figure 4, multiple fumaroles 11 that gas channel is arranged by bottom land are in communication with the outside.Center ring 7 is identical with the notch direction of radial strut 6, and the gas channel in center ring 7 and radial strut 6 communicates with each other, and forms the air flow chamber that a shape is corresponding with flameholder.After combustion gas input air flow chamber, spray from the fumarole 11 at the bottom of the member slots of channel-shaped structure, burning has been contacted with air, the cell wall of the component of channel-shaped structure can well stop the impact of the high velocity air of main combustion stage jet pipe 1 and level jet pipe 3 on duty ejection makes combustion gas can realize smooth combustion on flameholder.
The quantity of the fumarole in each radial strut 6 is 1 or 2, is distributed in the middle part of radial strut, within the scope of distance center ring 7 center 95 ~ 130mm; The quantitative range of the fumarole on center ring 7 is 10 ~ 20, is uniformly distributed; The diameter range of fumarole is 0.9mm ~ 1.5mm.
Ground combustion machine combustion chamber comprises several burners, and burner is evenly arranged along unit circumferencial direction, and oblique cutting enters in combustor outer casing. and combustor outer casing and combustion chamber compressor cylinder of holding concurrently is connected in aggregates.Burner is made up of fuel nozzle group (comprising main combustion stage jet pipe and level jet pipe on duty), combustion barrel, changeover portion and bypass valve and annex.Bypass valve can control the burning of fuel, stabilizes the flame, and prevents detonation.
As shown in Figure 5, cyclone on duty and eight main cyclone devices around cyclone on duty are provided with in the middle part of the inlet end of combustion barrel.Cyclone is made up of whirl cylinder, blade, and blade is positioned at whirl cylinder, has centre bore in the middle part of blade, and blade shroud is arranged around centre bore.As shown in Figure 5,6, the centre bore 10 of main combustion stage jet pipe 1 in the middle part of main cyclone device blade 41 penetrates main cyclone cylinder 4, and the centre bore 8 of level jet pipe 3 on duty in the middle part of swirler blades 31 on duty penetrates whirl cylinder 5 on duty.The whirl cylinder 4 of eight main cyclone devices is connected as a single entity, and forms a loop configuration, is made up of the external annulus 42 of alternate setting and internal ring wall 43.External annulus 42 and internal ring wall 43 are connected together by some pieces of connecting plates 44 between them, and the blade 41 of each main cyclone device is located in the gap between two adjacent connecting plates 44 correspondingly.External annulus 42 is mutually close with the afterbody of internal ring wall 43, and form the converging portion of main cyclone cylinder, the converging portion of each main cyclone device communicates with each other, and is not namely connected block 44 and separates.Be integrated on the inwall that external annulus 42 is fixed on combustion barrel or with the inwall of combustion barrel, the converging portion of each main cyclone cylinder communicates with each other, and can reduce the speed of whirl cylinder downstream combustion gas further.In addition, the whirl cylinder of annular, is conducive to the weight alleviating combustion barrel, simplifies the structure of combustion barrel.Distance between the external annulus 42 of main cyclone cylinder and internal ring wall 43, front end is 1/4 ~ 1/3 of combustion barrel diameter, and the convergent angle scope of converging portion two wall is 20 ° ~ 30 °.Whirl cylinder 5 afterbody expansion on duty, internal ring wall 43 front end and whirl cylinder front end on duty connect together.External annulus 42 is integrated with the inwall of combustion barrel.
Combustion barrel also comprises some Gas Pipe 16, Gas Pipe 16 puts in combustion barrel inside from the inlet end of combustion barrel along the external annulus 42 of main cyclone cylinder, apart from wall 2 ~ 5mm, concrete structure is: be axially arranged with several fins 9 inside external annulus 42, there is in fin 9 through hole that runs through its both ends of the surface, contiguous block 44 is fixed on fin 9 one to one, every bar Gas Pipe 16 is passed from the through hole of a fin 9, at the converging portion of main cyclone cylinder, with external annulus 42 bending 20 ° ~ 30 ° to the inside, and be connected with the radial strut 6 of flameholder nearby, and be communicated with the air flow chamber of flameholder, combustion gas is input in the air flow chamber of flameholder.
Flameholder is fixed in combustion barrel by its outer T-Ring, is positioned at cyclone downstream, and the distance range between the internal ring wall 43 of the main cyclone cylinder of main cyclone device is 20 ~ 40mm.The ring body of the center ring of flameholder is relative with the nozzle that the whirl cylinder on duty 5 of cyclone on duty is expanded, and the middle part in the gap between main cyclone device blade center hole 10 with adjacent two radial strut 6 is relative.This structure is mainly for reducing flameholder to the resistance of stream under main transverter and transverter on duty.
Above-described embodiment is only a preferred embodiment of the present invention, and should not become limiting the scope of the invention, the specific embodiment of the present invention does not limit above-described embodiment.According to foregoing of the present invention; according to ordinary technical knowledge and the customary means of this area; do not departing under the present invention's above-mentioned basic fundamental thought prerequisite, the present invention can also make the amendment of other various ways, replacement or change, all should drop within the scope of rights protection of the present invention.
Claims (8)
1. a flameholder, it is characterized in that, several radial strut comprising center ring and be radially fixed on equably on center ring outer ring surface, ring body and the described radial strut of described center ring are all made up of the component of channel-shaped structure, and described center ring is identical with the notch direction of described radial strut, gas channel is provided with in the component of described channel-shaped structure, multiple fumaroles that described gas channel is arranged by bottom land are in communication with the outside, gas channel in described center ring and described radial strut communicates with each other, form the air flow chamber that a shape is corresponding with described flameholder.
2. flameholder according to claim 1, is characterized in that, the free end of described radial strut is all connected with the inner ring surface of a connecting ring.
3. the ground combustion machine combustion chamber with flameholder described in claim 1 or 2, described combustion chamber comprises combustion barrel, the inlet end of described combustion barrel is provided with cyclone on duty and several main cyclone devices around described cyclone on duty, it is characterized in that, described flameholder is also provided with in described combustion barrel, described flameholder is fixed on the downstream of described cyclone by its radial strut or connecting ring, the quantity of described radial strut is corresponding with the quantity of described main cyclone device, gap between each described main cyclone device with adjacent two described radial strut is relative, described combustion barrel also comprises Gas Pipe, described Gas Pipe puts in combustion barrel inside from the inlet end of described combustion barrel and is connected with described flameholder, and be communicated with the air flow chamber of described flameholder.
4. ground combustion machine combustion chamber according to claim 3, is characterized in that, the distance range between described flameholder and described main cyclone device is 20 ~ 40mm.
5. ground combustion machine combustion chamber according to claim 4, it is characterized in that, the ring body of the center ring of described flameholder is relative with the nozzle that the whirl cylinder on duty of described cyclone on duty is expanded, and described main cyclone device blade center hole is relative with the middle part in the gap between radial strut described in adjacent two.
6. ground combustion machine combustion chamber according to claim 3, is characterized in that, the quantity of the fumarole in each described radial strut is 1 or 2, is distributed in the middle part of described radial strut; The quantitative range of the fumarole on described center ring is 10 ~ 20, is uniformly distributed; The diameter range of described fumarole is 0.9mm ~ 1.5mm.
7. the ground combustion machine combustion chamber according to any one of claim 3 ~ 6 claim, it is characterized in that, described in several, the whirl cylinder of main cyclone device is connected as a single entity, form a loop configuration, be made up of the external annulus of alternate setting and internal ring wall, described external annulus and internal ring wall are connected together by some pieces of connecting plates between them, the blade of each main cyclone device is located in the gap between two connecting plates correspondingly, described external annulus is mutually close with the afterbody of described internal ring wall, form the converging portion of main cyclone cylinder, the converging portion of each main cyclone device communicates with each other, namely be not connected block to separate, described internal ring wall is connected with the whirl cylinder on duty of described cyclone on duty, be integrated on the inwall that described external annulus is fixed on described combustion barrel or with the inwall of described combustion barrel.
8. ground combustion machine combustion chamber according to claim 7, it is characterized in that, several fins are axially arranged with inside described external annulus, there is in fin the through hole that runs through its both ends of the surface, described Gas Pipe is passed from the through hole of described fin, be connected with the radial strut of described flameholder nearby, described contiguous block is fixed on described fin one to one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510242234.1A CN104896510B (en) | 2015-05-13 | 2015-05-13 | Flame holder and ground gas turbine combustion chamber with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510242234.1A CN104896510B (en) | 2015-05-13 | 2015-05-13 | Flame holder and ground gas turbine combustion chamber with same |
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| CN104896510A true CN104896510A (en) | 2015-09-09 |
| CN104896510B CN104896510B (en) | 2017-02-01 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465831A (en) * | 2016-01-12 | 2016-04-06 | 西北工业大学 | Gas turbine combustion chamber provided with double flame tubes and flame holder |
| CN105650679A (en) * | 2016-01-19 | 2016-06-08 | 西北工业大学 | Combustion chamber of ground combustion engine with premixed third-class rotational flow part |
| CN105650680A (en) * | 2016-01-19 | 2016-06-08 | 西北工业大学 | Head design of combustion chamber of twin-stage premixing ground-based gas turbine |
| CN105674333A (en) * | 2016-01-12 | 2016-06-15 | 西北工业大学 | Combustion chamber structure of ground combustion engine and staged combustion organization method of combustion chamber structure |
| KR20190004612A (en) * | 2017-07-04 | 2019-01-14 | 두산중공업 주식회사 | Fuel nozzle assembly and combustor and gas turbine having the same |
| CN112050256A (en) * | 2020-09-18 | 2020-12-08 | 中国航发四川燃气涡轮研究院 | Ground gas turbine combustion chamber head with multi-stage rotational flow and partial premixing |
| CN114440259A (en) * | 2021-12-14 | 2022-05-06 | 西安航天动力研究所 | Spliced flame stabilizing device with multiple oil supply paths |
| CN115574347A (en) * | 2022-09-16 | 2023-01-06 | 南京航空航天大学 | Single-inlet single-standing-vortex concave cavity stabilizer for afterburner |
Families Citing this family (1)
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| CN112178637B (en) * | 2020-08-17 | 2021-08-03 | 上海交通大学 | Flame stabilizing device convenient to adjust incoming flow |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105465831A (en) * | 2016-01-12 | 2016-04-06 | 西北工业大学 | Gas turbine combustion chamber provided with double flame tubes and flame holder |
| CN105674333A (en) * | 2016-01-12 | 2016-06-15 | 西北工业大学 | Combustion chamber structure of ground combustion engine and staged combustion organization method of combustion chamber structure |
| CN105650679A (en) * | 2016-01-19 | 2016-06-08 | 西北工业大学 | Combustion chamber of ground combustion engine with premixed third-class rotational flow part |
| CN105650680A (en) * | 2016-01-19 | 2016-06-08 | 西北工业大学 | Head design of combustion chamber of twin-stage premixing ground-based gas turbine |
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| CN112050256A (en) * | 2020-09-18 | 2020-12-08 | 中国航发四川燃气涡轮研究院 | Ground gas turbine combustion chamber head with multi-stage rotational flow and partial premixing |
| CN114440259A (en) * | 2021-12-14 | 2022-05-06 | 西安航天动力研究所 | Spliced flame stabilizing device with multiple oil supply paths |
| CN115574347A (en) * | 2022-09-16 | 2023-01-06 | 南京航空航天大学 | Single-inlet single-standing-vortex concave cavity stabilizer for afterburner |
| CN115574347B (en) * | 2022-09-16 | 2023-12-29 | 南京航空航天大学 | Single-inlet single-resident cavitation chamber stabilizer for afterburner |
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