CN106051826B - A kind of quick mixing device of cracking air-gas - Google Patents
A kind of quick mixing device of cracking air-gas Download PDFInfo
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- CN106051826B CN106051826B CN201610416346.9A CN201610416346A CN106051826B CN 106051826 B CN106051826 B CN 106051826B CN 201610416346 A CN201610416346 A CN 201610416346A CN 106051826 B CN106051826 B CN 106051826B
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- lobe
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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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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The purpose of the present invention is to provide a kind of quick mixing devices of cracking gas-air,Including outer housing,Inner housing,Lobe-mixer,Inner housing is arranged in outer housing,Cyclone air inlet runner is formed between inner housing and outer housing,Lobe-mixer includes lobe mixing structure inner flow passage wall,Lobe male structure,The recessed structure of lobe,Lobe male structure arrangement alternate with the recessed structure of lobe constitutes loop configuration,Lobe mixing structure inner flow passage wall connects loop configuration,The lobe mixing structure inner flow passage that lobe mixing structure inner flow passage wall forms connection rich oil cracking combustion chamber cracks fuel gas inlet,Lobe-mixer is arranged in inner housing,Lobe dilution air runner is formed between lobe mixing structure inner flow passage wall and inner housing,The exit setting of lobe-mixer is equipped with the oblique radial flow path of swirl vane,The outlet setting cracking gas-air mixed gas outlet of oblique radial flow path.The present invention can complete the quick blending of cracking combustion gas and air, reduce the generation of fuel-poor region NOx.
Description
Technical field
The present invention relates to a kind of gas-turbine combustion chambers, the specifically mixing device of gas-turbine combustion chamber.
Background technology
Low emissions combustion technology is increasingly becoming one of central topic of engine combustion technology, is had developed for this problem
Such as fractional combustion, rich oil-extinguishing-oil-poor (RQL), bispin premixed swirl (TAPS), lean premixed preevaporated (LPP), oil-poor
The technologies such as multi-point injection (LDI).These technologies can meet needs of the current International Civil Aviation Organization to discharge.RQL combustion technologies
It is the outstanding person in numerous low emissions combustion technologies, the burning in rich oil area is the important ring that its combustion technology is realized.In rich oil
In burning zone, fuel oil and air mix combining combustion with the ratio of high equivalent weight ratio (1.4-1.8), generate a large amount of high activity groups, this
It lays a good foundation with poor oil firing for extinguishing later.Meanwhile the temperature in fuel-rich combustion area is also to influence NOXGenerate it is important because
Element.First, problems faced is that rich oil area cannot use air film type to cool down, and nitrogen oxides is generated to reduce equivalent proportion burning；Its
Secondary, the temperature of combustion zone is unsuitable excessively high, to avoid thermal NOXGeneration.
In order to solve the problems, a kind of new combustion chamber control strategy is proposed --- fuel-rich autothermic cracking combustion system,
The strategy is similar to RQL low emission combustor control strategies, and fuel oil first carries out under the conditions of high equivalent weight ratio in fuel-rich cracking section
Reaction, due to excessive fuel, combustion flame temperature is relatively low, and entire reaction zone is in low-temperature reduction atmosphere, the N in air2Very
Difficulty is oxidized to NO, while superfluous fuel can absorb the heat of combustion zone, be evaporated and crack, and forms high energy hydrogen and small carbon
Chain hydrocarbon content further reduced combustion zone temperature, tentatively with the generation of fuel-rich combustion form control NOx.Then, not completely
The cracking fuel of burning with mixing air by quickly blending, and formation lean combustion gaseous mixture burns again in fuel-poor region, this strategy
Combustion chamber is dexterously avoided appropriately than the generation of the high-temperature area of burning, to achieve the purpose that reduce pollutant NOx discharge.
But, if it can ensure that crack combustion gas quickly blends with air, makes cracking combustion gas in fuel-poor region poor oil firing be still to need to solve
A great problem certainly.
Invention content
The purpose of the present invention is to provide the quick blending that can complete cracking combustion gas and air, reduce fuel-poor region NOx lifes
At a kind of quick mixing device of cracking air-gas.
The object of the present invention is achieved like this：
A kind of quick mixing device of cracking air-gas of the invention, it is characterized in that：It is mixed including outer housing, inner housing, lobe
Mixed device, inner housing are arranged in outer housing, and cyclone air inlet runner is formed between inner housing and outer housing, and the lobe is mixed
Mixed device includes lobe mixing structure inner flow passage wall, lobe male structure, the recessed structure of lobe, and lobe male structure is alternate with the recessed structure of lobe
Arrangement constitutes loop configuration, and the center of loop configuration end is closed type structure, and lobe mixing structure inner flow passage wall connects ring junction
Structure, the lobe mixing structure inner flow passage cracking combustion gas that lobe mixing structure inner flow passage wall forms connection rich oil cracking combustion chamber enter
Mouthful, lobe-mixer is arranged in inner housing, and lobe dilution air is formed between lobe mixing structure inner flow passage wall and inner housing
Runner, lobe mixing structure inner flow passage crack fuel gas inlet and are connected to lobe male structure, and it is recessed that lobe dilution air runner is connected to lobe
Structure, the exit setting of lobe-mixer are equipped with the oblique radial flow path of swirl vane, the connection of cyclone air inlet runner
Oblique radial flow path, the outlet setting cracking air-gas mixed gas outlet of oblique radial flow path.
The present invention can also include：
1, lobe mixing structure inner flow passage cracking fuel gas inlet and lobe male structure constitute lobe mixing structure inner flow passage, wave
Valve mixing structure inner flow passage is contraction-flaring form.
Advantage of the invention is that：
1, in the fuel-rich combustion room of oil-poor (RQL) the combustion chambers burn technical field of gas turbine rich oil-extinguishing-and oil-poor combustion
It burns in the linkage section between room, is put forward for the first time a kind of quick mixing device of cracking air-gas.
2, a converging diverging channel can all be flowed through by cracking combustion gas and air, and the flowing velocity of fluid can be made quickly to increase,
The effect of cyclone is that cracking air-gas is allowed quickly to be blended.
3, the converging diverging channel of lobe can be allocated in proportion, and cracking combustion gas, air can be made to blend by a certain percentage.
Description of the drawings
Fig. 1 is the installation diagram that the present invention carries fuel-rich combustion room；
Fig. 2 is the three-dimensional cutaway view of the present invention；
Fig. 3 is the section plan of the present invention；
Fig. 4 is Fig. 3 slice location schematic diagrames.
Specific implementation mode
It illustrates below in conjunction with the accompanying drawings and the present invention is described in more detail：
In conjunction with Fig. 1-4, it includes cyclone air inlet runner 1, lobe that the present invention, which cracks the quick mixing device of air-gas,
Dilution air runner 2, installs the oblique radial flow path 3 of swirl vane, and lobe mixing structure inner flow passage cracks fuel gas inlet 5, cracking
Air-gas mixed gas outlet 6, swirl vane 7, lobe-mixer 8, lobe male structure 9 are also lobe mixing structure inner flow passage
Crack gas outlet, the recessed structure 10 of lobe is also lobe mixing structure outer flow passage air outlet slit, install the clino-diagonal of swirl vane to
Runner exit 11, the closed type structure 12 of lobe mixing structure center flow channels, cyclone 14, the device crack combustion chamber 4 with rich oil
Mounting structure is as shown in Figure 1.
Wherein swirl vane 7 is mounted on cyclone end, and lobe mixing structure center flow channels are closed type structure 12, and rich oil is certainly
The outlet of cracking combustion chamber 4 is connect with lobe structure, and due to the bumps variation of lobe structure, cracking combustion gas 13 flows into lobe blending knot
It will be divided into multiply after structure inner flow passage cracking fuel gas inlet 5, be flowed out by lobe male structure 9.In lobe outer tunnel 2, air also by
It is divided into multiply, is flowed out by the recessed structure of lobe 10, the recessed structure 10 of lobe, at distributing alternately, can control ratio with lobe male structure 9
Blending.The outlet of lobe structure connects cyclone, and contraction-flaring channel, lobe are formed between lobe mixing structure and cyclone
Structure outer flow passage air is flowed out with cracking combustion gas by contraction-flaring channel, cracking combustion gas and air lobe structure export at
It distributes alternately, and flow velocity reduces, a large amount of air is entered by cyclone air intlet 3, after 7 eddy flow of swirl vane and from wave
Valve structure, which distributes alternately, cracks air-gas blending, finally from 6 outflow of cracking air-gas mixed gas outlet, since eddy flow is empty
Gas has larger spinning momentum, has further speeded up the quick blending of cracking air-gas, under the gas quickly blended enters
Grade combustion chamber carries out poor oil firing.
Since lobe mixing structure center flow channels are closed type structure, cracking combustion gas can only be flowed out from lobe male structure 9.
Lobe mixing structure inner flow passage is cracking combustion gas runner, is contraction-flaring form in structure, is mainly in contraction section
Accelerate cracking combustion gas itself blending, gas flow rate is cracked mainly for reducing in expansion segment, improves it and outer flow passage even revolves
The air for flowing device blends performance.
Lobe mixing structure is concave-convex alternate arrangement, and internal channel cracking blast tube and outer tunnel air go out in lobe structure
Mouth can distribute alternately.
Cyclone inner vanes are beveling forms, and swirl vane internal air passageway in a certain angle with the axis, is split
Cracking air-gas can be further set quickly to be mixed by the quick cyclonic action of cyclone after solution air-gas blending
It is mixed.
Fig. 1 and Fig. 2 together illustrates the operation principle of the lobe-mixer, and the discharge of rich oil autothermic cracking combustor exit is split
It solves combustion gas 13 and the entrance of fuel gas inlet 5 is cracked by lobe mixing structure inner flow passage first, exporting in lobe and crack combustion gas will
The air of blending is flowed into from dilution air channel 2, is flowed out by the recessed structure of lobe 10, and the cracking flowed out by lobe male structure 9 is strengthened
The air blending that combustion gas and the recessed structure 10 of lobe flow out, this process can control the two ratio blending.Another part air is from rotation
The oblique radial flow path 3 that device gas flow 1 enters in swirl vane is flowed, after 7 eddy flow of swirl vane, and in cracking air-gas
Mixed gas outlet 6 forms quick swirling eddy.Since rotational flow air has larger spinning momentum, cracking has been further speeded up
The quick blending of air-gas.
Fig. 3 further illustrates the main mixing structure of the quick mixing device of cracking air-gas.Lobe mixing structure
Inner flow passage is contraction-flaring form, and contraction section accelerates cracking combustion gas itself blending, cracking combustion gas stream is reduced in expansion segment
Speed improves it and blends performance with outer flow passage air.Outer flow passage is shrink form, because its channel subtracts with respect to dilution air channel 2
It is half as large, so being shrink form.Quick axial flow produces certain election to flame and acts on, this so that subordinate is oil-poor
It moves, is effectively prevented to unfavorable factors such as mixing machine high temperature sinterings behind the high-temperature region of combustion chamber, can also be played in the process steady
Determine flame, prevents the effect of rough burning.
Fig. 4 illustrates the selected slice locations of Fig. 3.
The design of cyclone is illustrated in Fig. 4 primarily to lobe-mixer formed a contraction-flaring channel with
And provide a good quick blending mode, the collective effect in contraction-flaring channel and cyclone to cracking combustion gas and air
So that mixed gas speed is further increased, generates and elect flame, make high-temperature region far from the quick mixing device of cracking air-gas.
Claims (2)
1. a kind of quick mixing device of cracking air-gas, it is characterized in that：It is interior including outer housing, inner housing, lobe-mixer
Shell is arranged in outer housing, and cyclone air inlet runner, the lobe-mixer packet are formed between inner housing and outer housing
Include lobe mixing structure inner flow passage wall, lobe male structure, the recessed structure of lobe, lobe male structure arrangement structure alternate with the recessed structure of lobe
Structure is circularized, the center of loop configuration end is closed type structure, and lobe mixing structure inner flow passage wall connects loop configuration, lobe
The lobe mixing structure inner flow passage that mixing structure inner flow passage wall forms connection rich oil cracking combustion chamber cracks fuel gas inlet, and lobe is mixed
Mixed device is arranged in inner housing, and lobe dilution air runner, lobe are formed between lobe mixing structure inner flow passage wall and inner housing
Mixing structure inner flow passage cracks fuel gas inlet and is connected to lobe male structure, and lobe dilution air runner is connected to the recessed structure of lobe, lobe
The exit setting of mixing machine is equipped with the oblique radial flow path of swirl vane, and cyclone air inlet runner is connected to oblique radial flow
Road, the outlet setting cracking air-gas mixed gas outlet of oblique radial flow path.
2. a kind of quick mixing device of cracking air-gas according to claim 1, it is characterized in that：Lobe mixing structure
Inner flow passage cracks fuel gas inlet and constitutes lobe mixing structure inner flow passage with lobe male structure, and lobe mixing structure inner flow passage is to receive
Contracting-flaring form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610416346.9A CN106051826B (en) | 2016-06-12 | 2016-06-12 | A kind of quick mixing device of cracking air-gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610416346.9A CN106051826B (en) | 2016-06-12 | 2016-06-12 | A kind of quick mixing device of cracking air-gas |
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| Publication Number | Publication Date |
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| CN106051826A CN106051826A (en) | 2016-10-26 |
| CN106051826B true CN106051826B (en) | 2018-07-24 |
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| CN201610416346.9A Active CN106051826B (en) | 2016-06-12 | 2016-06-12 | A kind of quick mixing device of cracking air-gas |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10513987B2 (en) * | 2016-12-30 | 2019-12-24 | General Electric Company | System for dissipating fuel egress in fuel supply conduit assemblies |
| CN107246629A (en) * | 2017-06-14 | 2017-10-13 | 华电电力科学研究院 | Cyclone with lobe swirl vane |
| CN107366929B (en) * | 2017-07-20 | 2020-03-17 | 中国科学院工程热物理研究所 | Nozzle with divergent profile swirler |
| CN107576502B (en) * | 2017-08-10 | 2019-11-12 | 中国北方发动机研究所(天津) | A kind of turbocharger test platform combustion chamber with mixing section |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202417714U (en) * | 2011-12-13 | 2012-09-05 | 湖南航天机电设备与特种材料研究所 | Turbine-based fuel gas generator for floating platform of emergency hot air airship |
| CN102777934A (en) * | 2011-05-10 | 2012-11-14 | 中国科学院工程热物理研究所 | Standing-vortex soft combustion chamber |
| CN103196159A (en) * | 2013-03-18 | 2013-07-10 | 哈尔滨工程大学 | Annular grading trapped vortex combustor |
| CN103277815A (en) * | 2013-05-10 | 2013-09-04 | 南京航空航天大学 | Lean oil portion pre-mixing pre-evaporation homogenizing oil feeding device |
-
2016
- 2016-06-12 CN CN201610416346.9A patent/CN106051826B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777934A (en) * | 2011-05-10 | 2012-11-14 | 中国科学院工程热物理研究所 | Standing-vortex soft combustion chamber |
| CN202417714U (en) * | 2011-12-13 | 2012-09-05 | 湖南航天机电设备与特种材料研究所 | Turbine-based fuel gas generator for floating platform of emergency hot air airship |
| CN103196159A (en) * | 2013-03-18 | 2013-07-10 | 哈尔滨工程大学 | Annular grading trapped vortex combustor |
| CN103277815A (en) * | 2013-05-10 | 2013-09-04 | 南京航空航天大学 | Lean oil portion pre-mixing pre-evaporation homogenizing oil feeding device |
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| Publication number | Publication date |
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| CN106051826A (en) | 2016-10-26 |
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