CN109210535A - Supersonic jet flame stabilizing device - Google Patents
Supersonic jet flame stabilizing device Download PDFInfo
- Publication number
- CN109210535A CN109210535A CN201811054031.XA CN201811054031A CN109210535A CN 109210535 A CN109210535 A CN 109210535A CN 201811054031 A CN201811054031 A CN 201811054031A CN 109210535 A CN109210535 A CN 109210535A
- Authority
- CN
- China
- Prior art keywords
- flame
- jet
- supersonic jet
- supersonic
- stove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- 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
-
- 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
- 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
- F23D14/62—Mixing devices; Mixing tubes
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
A supersonic jet flame stabilizing device comprises a main body, wherein the main body comprises an outer shell and a supersonic jet shell positioned inside the outer shell, an annular space between the outer shell and the supersonic jet shell forms an outer premixing cavity, an inner premixing cavity is arranged in the supersonic jet shell, the top end of the supersonic jet shell is connected with a jet nozzle, the top end of the outer shell is provided with a planar flame burner, an annular planar flame plate of the planar flame burner is fixed at the top end of the outer shell, and the center of the annular planar flame plate is provided with a through hole for the jet nozzle to extend out; the outer premixing cavity is communicated with the outer gas supply channel, and the first combustible gas enters the outer premixing cavity through the outer gas supply channel to provide fuel for the planar flame burner. The inner premixing cavity is communicated with the inner gas supply channel, and the second combustible gas enters the inner premixing cavity through the inner gas supply channel to be premixed and then is sprayed out through the jet nozzle. It has the advantages of simple structure, high flame quality and less interference factors.
Description
Technical field
The present invention relates to a kind of supersonic jet flame stabilizer applied to optical measurement combustion diagnosis technical field,
More particularly to a kind of stabilising arrangement for maintaining supersonic jet flame with combustion flame using low speed.
Background technique
The deep interaction rule for understanding turbulent flow and burning, guidance are facilitated to portraying for supersonic jet flame structure
The design and optimization of scramjet engine has important scientific research meaning and engineering application value, increasingly becomes combustion
Burn the research hotspot of diagnostic field.But since flame propagation velocity is lower, it is difficult to stablize maintenance in supersonic jet, therefore set
Counting a kind of flame stabilizer is the premise for carrying out the research of supersonic jet flame.
Currently, supersonic jet flame stabilization is maintained mainly to use two methods: installing cavity additional；Subsonic speed precombustion.
Cavity is installed additional in supersonic jet region, is capable of forming a subsonic speed recirculating zone, and flame stabilization remains low herein
In fast region, and then the entire supersonic jet that ignites.A kind of cavity configuration for flame stabilization, as shown in Figure 1, ultrasonic rapid fire
Stream generates recirculating zone inside cavity, facilitates flame stabilization.As shown in Fig. 2, showing curved cavity in supersonic jet
A kind of mounting means.Fig. 2 is a kind of supersonic speed combustion chamber of cavity mode in parallel, by upper and lower two cavitys 1 in parallel, rationally
The layout for carrying out cavity 1, propellant spray point 2 and high-energy sparking plug 3 can be improved supersonic jet efficiency of combustion, be formed steady
Fixed supersonic jet flame.Using this cavity, can be realized supersonic jet flame stablizes burning.
Subsonic speed pre-combustion approach: first allowing fuel and Oxidant section to premix, and burning generates fuel-rich tail gas in the combustion chamber,
Supersonic speed is accelerated to by Laval nozzle, then is mixed and burned with supersonic speed oxidant, stable supersonic jet flame is generated.
Paper (Bresson, A., Bouchardy, P., Magre, P., Grisch, F., OH/acetone PLIF and CARS
thermometry in a supersonic reactive layer,AIAA Paper 2001-1759,AIAA/NAL-
NASDA-ISAS International Space Planes and Hypersonic Systems and Technologies
Conference, 10th, Kyoto, Japan, Apr.24-27,2001.) to give a kind of precombustion supersonic jet flame steady
Determine device, as shown in Figure 3.The device utilize Laval nozzle upstream precombustion, now by partial oxidation agent be passed through in fuel into
Then fuel-rich tail gas is accelerated to supersonic speed by Laval nozzle, and mixed with oxidant after afterflame in downstream by row precombustion
It burns, forms stable supersonic jet flame.
But structure is complicated for above two steady flame device, disturbing factor is more, is not suitable for for supersonic jet flame
Basic Experiment Study.Installing cavity additional needs supersonic jet to be in enclosed environment, although observation survey can be carried out by windowing
Amount, but due to louver angle, the limitation of quantity, certain interference and limitation can be still generated to optical measurement；In addition, installing cavity additional
Hypersonic flow field structure can be made increasingly complex, introduce excessive disturbing factor, be unfavorable for carrying out and targetedly study.Subsonic speed is pre-
Burner needs to provide a precombustion chamber and corresponding cooling device, and structure is complex, is not easy to realize；In addition, fuel-rich tail
Gas ingredient is complex, is unfavorable for carrying out the basic research of reaction mechanism etc..
Summary of the invention
In view of the defects existing in the prior art, the present invention provides a kind of supersonic jet flame stabilizer, has knot
The advantage that structure is simple, flame quality is high, disturbing factor is few.
To realize the above-mentioned technical purpose, the technical solution adopted by the present invention is that:
A kind of supersonic jet flame stabilizer, including main body, the main body include outer housing and be located at outer housing
Internal supersonic jet shell, the annular space between outer housing and supersonic jet shell forms outer premix chamber, described super
Interior premix chamber is equipped in velocity of sound jet stream shell, the top of the supersonic jet shell is connected with jet nozzle, the outer housing
Top be equipped with flat-flamed burner, the planar annular flame stone or metal plate for standing a stove on as a precaution against fire of flat-flamed burner is fixed on the top of outer housing,
And the center of planar annular flame stone or metal plate for standing a stove on as a precaution against fire offers the through-hole stretched out for jet nozzle；It is supplied outside the outer premix chamber connection logical
Road, the first fuel gas enter outer premix chamber through outer air supply channel, provide fuel for flat-flamed burner.The interior premix chamber
Air supply channel in connection, the second fuel gas spray after interior air supply channel enters interior premix chamber premix through jet nozzle.This hair
First fuel gas and the second fuel gas can use same fuel gas in bright, and different combustible gases can also be respectively adopted
Body.
In the present invention: flat-flamed burner the first fuel gas of burning generates the planar annular flame of low-speed stable, into
And an annular high-temperature area is formed in the jet nozzle periphery for being located at planar annular flame furnace disk center, it will be by using high temperature
The supersonic jet that jet nozzle sprays ignites, while the planar annular flame that flat-flamed burner burning generates can completely cut off
Cool ambient air reduces the volume of the cool ambient air as caused by the supersonic jet of center and inhales mixed influence, enables flame always
Stablize and maintains.
In the present invention: the outer housing is tubular shell, the central axis weight of the supersonic jet shell and outer housing
It closes.The outer premix chamber of annular is overlapped with the central axis of interior premix chamber.
In the present invention: the outlet of the jet nozzle is flushed with the stone or metal plate for standing a stove on as a precaution against fire of flat-flamed burner or slightly above plane is fiery
The stone or metal plate for standing a stove on as a precaution against fire of flame burner.Jet nozzle slightly stretches out flat flame stone or metal plate for standing a stove on as a precaution against fire little by little, can reduce the influence with combustion to central jet.
Preferably.The length that jet nozzle stretches out planar annular stone or metal plate for standing a stove on as a precaution against fire is 1mm, can reduce planar annular stone or metal plate for standing a stove on as a precaution against fire in this way and penetrate to center high speed
The interference of stream.
In the present invention: jet nozzle is Laval nozzle.Jet nozzle is mounted on supersonic speed by the way of being threadedly coupled
The top of jet stream shell.It can need according to the actual situation in this way, replace the nozzle of different Mach number and size.
In the present invention: planar annular flame stone or metal plate for standing a stove on as a precaution against fire is mounted on the top of outer housing, annular flat by bolted connection
Face flame stone or metal plate for standing a stove on as a precaution against fire is corresponding with the outer premix chamber of annular.The diameter of planar annular flame stone or metal plate for standing a stove on as a precaution against fire goes out relative to jet nozzle
Mouth diameter wants sufficiently large, and the diameter of general planar annular flame stone or metal plate for standing a stove on as a precaution against fire is 15 times or more of the outlet diameter of jet nozzle, guarantees
The high-temperature area of generation can completely cut off the influence of ambient cold air as far as possible.The jet nozzle for being 3mm for outlet diameter, it is corresponding
The diameter of planar annular flame stone or metal plate for standing a stove on as a precaution against fire is typically chosen 60-100mm, such as selects 70mm.
The partition for being provided with hollow out in the present invention in outer premix chamber is (for gas to pass through there are many laying i.e. on partition to lead to
Hole), partition top is shelved with stainless shot, guarantees that premix gas is sufficiently mixed, while preventing from being tempered.It is provided in interior premix chamber
Pressure tap, using the upstream stagnation pressure of pressure gauge detection jet nozzle, to determine supersonic jet operating condition.
To guarantee that reliability of the invention, its main body of the present apparatus integrally use stainless steel material.Its main body can be using not
Become rusty steel be integrally formed, can also each building block be fabricated separately rear assembled formation.
Compared with prior art, the present invention can generate following technical effect:
The present invention, with combustion flame, provides a continuous high temperature area, ultrasound of igniting in supersonic jet exit using low speed
Rapid fire stream premixes gas, while completely cutting off cool ambient air, to realize that stablizing for supersonic jet flame is burnt.
Detailed description of the invention
Fig. 1 is a kind of curved cavity schematic diagram (length unit: mm)；
Fig. 2 is a kind of supersonic speed combustion chamber schematic diagram (length unit: mm) of cavity mode in parallel；
Fig. 3 is a kind of supersonic combustion stabilising arrangement schematic diagram with precombustion chamber；
Fig. 4 is structural schematic diagram of the invention；
Fig. 5 is partial schematic diagram of the invention；
Fig. 6 is fluidic nozzle configurations schematic diagram of the invention；
Fig. 7 is the supersonic jet flame image obtained using the present invention (fuel gas of use is methane).
Appended drawing reference:
1. cavity；
2. propellant spray point；
3. high-energy sparking plug；
4. outer housing；
5. supersonic jet shell；
6. outer premix chamber；
Premix chamber in 7.；
8. jet nozzle；
9. flat-flamed burner；
10. planar annular flame stone or metal plate for standing a stove on as a precaution against fire；
11. outer air supply channel；
Air supply channel in 12.；
13. partition.
Specific embodiment
With reference to the accompanying drawing, embodiments of the present invention are described in further detail.
Referring to Fig. 4, a specific embodiment of the invention is provided.A kind of supersonic jet flame stabilizer, including use
The integrally formed main body of stainless steel, the main body include outer housing 4 and the supersonic jet shell 5 inside outer housing 4,
Annular space between outer housing 4 and supersonic jet shell 5 forms outer premix chamber 6.It is equipped in the supersonic jet shell 5
Interior premix chamber 7.The top of the supersonic jet shell 5 is connected with jet nozzle 8, and the top of the outer housing 4 is equipped with plane
Flame burner 9, the planar annular flame stone or metal plate for standing a stove on as a precaution against fire 10 of flat-flamed burner 9 are fixed on the top of outer housing 4, and planar annular
The center of flame stone or metal plate for standing a stove on as a precaution against fire 10 offers the through-hole stretched out for jet nozzle 8.The outer air supply channel 11 of 6 connection of outer premix chamber, the
One fuel gas enters outer premix chamber 6 through outer air supply channel 11, provides fuel for flat-flamed burner 9.The interior premix chamber 7
Air supply channel 12 in connection, the second fuel gas spray after interior air supply channel 12 enters interior premix chamber 7 premix through jet nozzle 8
Out.The first fuel gas and the second fuel gas use same fuel gas in the present embodiment, that is, are mixed with the methane of air.
The first fuel gas of burning of flat-flamed burner 9 generates the planar annular flame of low-speed stable, and then is being located at
8 periphery of jet nozzle at 10 center of planar annular flame stone or metal plate for standing a stove on as a precaution against fire forms an annular high-temperature area, will be by jet stream using high temperature
The supersonic jet that nozzle sprays ignites, while the planar annular flame that the burning of flat-flamed burner 9 generates can completely cut off outside
Boundary's cold air reduces the volume of the cool ambient air as caused by the supersonic jet of center and inhales mixed influence, keeps flame steady always
It is fixed to maintain.
In the present embodiment: the outer housing is cylinder shell.The center of the supersonic jet shell 5 and outer housing 6
Axis is overlapped.The outer premix chamber 6 of annular is overlapped with the central axis of interior premix chamber 7.The design of outer premix chamber 6 and interior premix chamber 7
It is highly identical, it is in the present embodiment 150mm.It is to be provided with close to the position of outer air supply channel in the upstream of outer premix chamber 6
The partition 13 of annular is laid on partition 13 there are many through-hole for gas to pass through, is filled up in the outer premix chamber of 13 top of partition straight
The stainless shot of diameter 2mm, stainless shot, which directly rests on, (can be not shown stainless shot) on partition 13 in Fig. 4.
Referring to 5 and 6, in the present embodiment: jet nozzle 8 uses Mach 2 ship 2.0, and outlet diameter is the round Bearing score of 3mm
That nozzle.Jet nozzle 8 slightly stretches out flat flame stone or metal plate for standing a stove on as a precaution against fire little by little, and the length that jet nozzle 8 stretches out planar annular stone or metal plate for standing a stove on as a precaution against fire 10 is
1mm can reduce interference of the planar annular stone or metal plate for standing a stove on as a precaution against fire to center high-speed jet in this way.Jet nozzle is installed by the way of being threadedly coupled
On the top of supersonic jet shell.It can need according to the actual situation in this way, replace the nozzle of different Mach number and size.
Planar annular flame stone or metal plate for standing a stove on as a precaution against fire 10 is mounted on the top of outer housing, planar annular flame furnace by bolted connection
Disk 10 is corresponding with the outer premix chamber of annular.Outlet diameter of the diameter of planar annular flame stone or metal plate for standing a stove on as a precaution against fire relative to jet nozzle
Want sufficiently large, the diameter of general planar annular flame stone or metal plate for standing a stove on as a precaution against fire is 15 times or more of the outlet diameter of jet nozzle, guarantees generation
High-temperature area can completely cut off the influence of ambient cold air as far as possible.The jet nozzle for being 3mm for the present embodiment middle outlet diameter, it is right
The diameter for the planar annular flame stone or metal plate for standing a stove on as a precaution against fire answered selects 70mm.
Fig. 7 is the supersonic jet flame image obtained using the present invention, by facts have proved that of the invention stablizing fills
Stable supersonic jet flame can be generated by setting.
The foregoing is merely a preferred embodiment of the present invention, are not intended to restrict the invention, for this field
For technical staff, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of supersonic jet flame stabilizer, including main body, it is characterised in that: the main body includes outer housing and position
Supersonic jet shell inside outer housing, the annular space between outer housing and supersonic jet shell form outer premix
Chamber, the supersonic jet shell is interior to be equipped with interior premix chamber, and the top of the supersonic jet shell is connected with jet nozzle, institute
The top for stating outer housing is equipped with flat-flamed burner, and the planar annular flame stone or metal plate for standing a stove on as a precaution against fire of flat-flamed burner is fixed on outer housing
Top, and the center of planar annular flame stone or metal plate for standing a stove on as a precaution against fire offer for jet nozzle stretch out through-hole；Outside the outer premix chamber connection
Air supply channel, the first fuel gas enter outer premix chamber through outer air supply channel, provide fuel for flat-flamed burner；In described
Air supply channel in premix chamber connection, the second fuel gas spray after interior air supply channel enters interior premix chamber premix through jet nozzle
Out.
2. supersonic jet flame stabilizer according to claim 1, it is characterised in that: flat-flamed burner burning
First fuel gas generates the planar annular flame of low-speed stable, and then sprays in the jet stream for being located at planar annular flame furnace disk center
Mouth periphery forms an annular high-temperature area, and the supersonic jet sprayed by jet nozzle is ignited using high temperature, puts down simultaneously
The planar annular flame that flame burner burning in face generates can completely cut off cool ambient air, reduce since center supersonic jet is led
The cool ambient air volume of cause inhales mixed influence, enables flame stable maintenance always.
3. supersonic jet flame stabilizer according to claim 1, it is characterised in that: the outer housing is cylindrical case
Body；The supersonic jet shell is overlapped with the central axis of outer housing；The outer premix chamber of annular and the central axis of interior premix chamber
Line is overlapped.
4. supersonic jet flame stabilizer according to claim 1,2 or 3, it is characterised in that the jet nozzle
Outlet flushes with the stone or metal plate for standing a stove on as a precaution against fire of flat-flamed burner or slightly stretches out the stone or metal plate for standing a stove on as a precaution against fire of flat-flamed burner.
5. supersonic jet flame stabilizer according to claim 4, it is characterised in that: jet nozzle stretches out annular flat
The length of face stone or metal plate for standing a stove on as a precaution against fire is 1mm.
6. supersonic jet flame stabilizer according to claim 4, it is characterised in that: the jet nozzle is Bearing score
That nozzle；Jet nozzle is mounted on the top of supersonic jet shell by the way of being threadedly coupled.
7. supersonic jet flame stabilizer according to claim 6, it is characterised in that: planar annular flame stone or metal plate for standing a stove on as a precaution against fire is logical
The top that bolted mode is mounted on outer housing is crossed, planar annular flame stone or metal plate for standing a stove on as a precaution against fire is corresponding with the outer premix chamber of annular
's.
8. supersonic jet flame stabilizer according to claim 4, it is characterised in that: planar annular flame stone or metal plate for standing a stove on as a precaution against fire
Diameter is 15 times of the outlet diameter of jet nozzle or more.
9. supersonic jet flame stabilizer according to claim 4, it is characterised in that: be provided in outer premix chamber
Partition is laid on partition there are many through-hole for gas to pass through, is shelved with stainless shot above partition；It is arranged in interior premix chamber
There is pressure tap, using the upstream stagnation pressure of pressure gauge detection jet nozzle, to determine supersonic jet operating condition.
10. supersonic jet flame stabilizer according to claim 4, it is characterised in that: the jet nozzle uses
Outlet diameter is the round Laval nozzle of 3mm, and the diameter of corresponding planar annular flame stone or metal plate for standing a stove on as a precaution against fire is 60-100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811054031.XA CN109210535A (en) | 2018-09-11 | 2018-09-11 | Supersonic jet flame stabilizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811054031.XA CN109210535A (en) | 2018-09-11 | 2018-09-11 | Supersonic jet flame stabilizing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109210535A true CN109210535A (en) | 2019-01-15 |
Family
ID=64986819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811054031.XA Pending CN109210535A (en) | 2018-09-11 | 2018-09-11 | Supersonic jet flame stabilizing device |
Country Status (1)
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| CN (1) | CN109210535A (en) |
Citations (6)
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| CN201313216Y (en) * | 2008-11-21 | 2009-09-23 | 鞍山钢铁集团公司 | Novel oxygen acetylene flame precision fast cutting tool |
| CN201339935Y (en) * | 2008-12-11 | 2009-11-04 | 扬州市宏昌机械有限公司 | Energy-gathering supersonic continuous casting cutting nozzle |
| CN102226533A (en) * | 2011-05-26 | 2011-10-26 | 中国人民解放军国防科学技术大学 | High-speed premixed flame furnace for supersonic burning research |
| CN106016364A (en) * | 2016-07-13 | 2016-10-12 | 哈尔滨汽轮机厂有限责任公司 | Unit two-cyclone premixed combustion nozzle for dry-type low-pollution combustion chamber of gas turbine |
| CN106402856A (en) * | 2016-11-22 | 2017-02-15 | 北京航空航天大学 | High-temperature gas generating device and method capable of continuously, quickly and linearly adjusting temperature within large range |
| CN106568100A (en) * | 2016-10-09 | 2017-04-19 | 上海交通大学 | Large-gradient following wake jet flame burner |
-
2018
- 2018-09-11 CN CN201811054031.XA patent/CN109210535A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201313216Y (en) * | 2008-11-21 | 2009-09-23 | 鞍山钢铁集团公司 | Novel oxygen acetylene flame precision fast cutting tool |
| CN201339935Y (en) * | 2008-12-11 | 2009-11-04 | 扬州市宏昌机械有限公司 | Energy-gathering supersonic continuous casting cutting nozzle |
| CN102226533A (en) * | 2011-05-26 | 2011-10-26 | 中国人民解放军国防科学技术大学 | High-speed premixed flame furnace for supersonic burning research |
| CN106016364A (en) * | 2016-07-13 | 2016-10-12 | 哈尔滨汽轮机厂有限责任公司 | Unit two-cyclone premixed combustion nozzle for dry-type low-pollution combustion chamber of gas turbine |
| CN106568100A (en) * | 2016-10-09 | 2017-04-19 | 上海交通大学 | Large-gradient following wake jet flame burner |
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