CN105423296B - A kind of burner outlet expansion segment and use its burner - Google Patents
A kind of burner outlet expansion segment and use its burner Download PDFInfo
- Publication number
- CN105423296B CN105423296B CN201511006110.XA CN201511006110A CN105423296B CN 105423296 B CN105423296 B CN 105423296B CN 201511006110 A CN201511006110 A CN 201511006110A CN 105423296 B CN105423296 B CN 105423296B
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- Prior art keywords
- expansion segment
- burner
- burner outlet
- outlet expansion
- cavity
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/32—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by electrostatic means
Abstract
A kind of burner outlet expansion segment, by the way that cavity is arranged on burner outlet expansion segment, and set multigroup Plasma Actuator in cavity lining, plasma can heat fluid, generate the vortex movement in active particle, induced flow reinforcement cavity, can promote combustion zone blending of falling liquid film, improve combustion state, strengthen burning stability, shorten the length of flame.And a kind of burner using the burner outlet expansion segment.The expansion segment of the present invention has achieved the effect that widening burner stablizes range of operation, improve efficiency of combustion, reduce combustion chamber axial dimension, it solves the problems, such as the combustion instability that wide-angle expansion segment occurs, can also solve the problems, such as the combustion instability that lower heat of combustion fuel occurs.
Description
Technical field
The present invention relates to burner field, relates more specifically to a kind of burner outlet expansion segment and use its burning
Device.
Background technology
Gas turbine is widely used in electric power, aviation, petrochemical industry due to the features such as single machine is small and output power
Etc. industries.Due to energy crisis and environmental degradation, be badly in need of development high-efficiency cleaning combustion chamber, it is desirable that combustion chamber have igniting it is reliable,
The characteristics such as flameholding, efficient and low emission.Current China problem of environmental pollution is extremely serious, development gas turbine cleaning combustion
Burning technology is very urgent.Gas turbine manufacturer has developed a variety of clean-burning technologies, and such as poor premixed combustion technology, dilute phase are pre-
Mixed pre-evaporation technique, oil-poor direct injection technology and catalytic combustion technology etc., although these technologies can effectively reduce pollutant
The problem of discharging, but all suffering from combustion instability.A kind of radial direction for liquid fuel combustion developed such as AM General company
Grading combustion technology can effectively reduce nitric oxide discharge.But since main flame stabilization is at the low speed edge of shear layer,
Shear layer low-speed region nearby will produce periodic vortex shedding, and oscillation is also easy to produce near stable point, be transported in off-design behaviour
Combustion instability phenomenon easily occurs when row.
Similar with gas turbine burner, other all types of industries burners, which are also faced with, to be stablized burning and reduces pollutant row
The contradiction put.
Invention content
In view of above-mentioned technical problem, it is an object of the invention to propose a kind of plasma cavity expansion segment and using its
Burner.
To achieve the goals above, as one aspect of the present invention, the present invention provides a kind of expansions of plasma cavity
Section is opened, including：
The medium position in the burner outlet expansion segment is arranged in cavity, for generating recirculating zone, stablizing burning；
High-field electrode and grounding electrode are located in the cavity, for generating plasma；
High voltage power supply or high voltage power supply binding post, for providing High Level AC Voltage for the high-field electrode and grounding electrode.
Preferably, the burner outlet expansion segment is in pyramid type hollow structure, pass through flange and burner outlet phase
Connection.The burner outlet expansion segment is prepared by ceramics or quartz glass, and thickness is between 0.1mm-20mm.
Preferably, the section of the cavity is circular arc type, triangle, quadrangle or pentagon, it is preferably semicircle.
Preferably, the high-field electrode is arranged with grounding electrode using alternative form in pairs；The high-field electrode with connect
The logarithm of ground electrode is between 1-100, between preferably 1-10.
Preferably, the material of the high-field electrode and grounding electrode is respectively independently selected from copper, tungsten or molybdenum.
Preferably, the output voltage of the high voltage power supply is 500V-50kV, output frequency 100-200kHz, output
Waveform is sine wave, square wave, sawtooth wave or impulse wave.
As another aspect of the present invention, expanded using burner outlet as described above the present invention also provides a kind of
The burner of section.Wherein, the burner is gas turbine burner, boiler-burner or chemical industry burner.
From above-mentioned technical proposal it is found that the plasma cavity expansion segment of the present invention has the beneficial effect of following several respects
Fruit：
(1) device is on the expansion segment of burner outlet by being arranged curved cavity, the recirculating zone formed in cavity
Flame can be prevented to be blown out, strengthen burning stability；
(2) device is passed through by setting multigroup dielectric barrier discharge plasma driver in the cavity lining of expansion segment
Plasma-induced flowing can strengthen the swirl flow in cavity, can play and reduce flow losses, flame is prevented to be blown out,
The effect of strengthen burning stability；
(3) ionization in cavity can be with heat release, generation active group, and all overheavy firing is reacted for these, prevents flame from being blown
It puts out, strengthen burning stability；
(4) Plasma Actuator being arranged in cavity can also play the role of igniting；
(5) device can solve the combustion instability phenomenon of wide-angle expansion segment, and wide-angle expansion segment can reduce fire
The length of flame reduces the axial dimension of combustion chamber.
Description of the drawings
Fig. 1 is the structural schematic diagram of the plasma cavity expansion segment of the present invention；
Fig. 2 is the right side partial enlarged view of plasma cavity expansion segment shown in Fig. 1；
Fig. 3 is the left side partial enlarged view of plasma cavity expansion segment shown in Fig. 1；
Fig. 4 is plasma-induced flow schematic diagram；
Fig. 5 is flow schematic diagram in expansion segment.
【Main element symbol description of the present invention】
10- expansion segments；
11- expansion segment cavitys；12- flange mounting holes；
20- high voltage power supplies；
21- high-pressure sides；22- ground terminals；
30- high-field electrodes；
The high-field electrode of first driver of 31-；The high-field electrode of second driver of 32-；
The high-field electrode of 33- third drivers；The high-field electrode of the 4th group driver of 34-；
The high-field electrode of the 5th driver of 35-；
40- grounding electrodes；
The grounding electrode of first driver of 41-；The grounding electrode of second driver of 42-；
The grounding electrode of 43- third drivers；The grounding electrode of the 4th group driver of 44-；
The grounding electrode of the 5th driver of 45-；
50- electrode connecting lines；
51- high-field electrode binding posts；52- high-field electrode knit-lines；
53- grounding electrode knit-lines；54- grounding electrode binding posts.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.It should be noted that in attached drawing or specification description, similar or identical portion
Divide and all uses identical reference numeral.The realization method for not being painted or describing in attached drawing is ordinary skill in technical field
Form known to personnel.In addition, though the demonstration of the parameter comprising particular value can be provided herein, it is to be understood that parameter is without true
It cuts equal to corresponding value, but can be similar to be worth accordingly in acceptable error margin or design constraint.It is carried in embodiment
The direction term arrived, such as "upper", "lower", "front", "rear", "left", "right" etc. are only the directions of refer to the attached drawing.Therefore, it uses
Direction term be for illustrating rather than for limiting the scope of the invention.
The invention discloses a kind of plasma cavity expansion segments, install expansion segment in burner outlet, flame can be made to receive
Contracting is in smaller range, and the transmission of active group and energy, can play strengthen burning stability between enhancing flame group
Important function but also sound emission can be significantly reduced.Expansion segment is conducive to the stabilization of flame using the smaller angle of flare, but
Remaining unburned reactant can be caused further to burn in flame downstream, flame structure is elongated, is unfavorable for the control for blending and discharging
System, while reducing the uniformity of outlet temperature；Expansion segment uses the larger angle of flare, recirculating zone can be made to shorten thicker, had
Conducive to reducing the axial dimension of combustion chamber, but when angle of flare is excessive, can make flame shake violent, be unfavorable for the stability of flame.
The present invention sets multigroup Plasma Actuator by the way that cavity is arranged on expansion segment, and in cavity lining, is formed in cavity
Recirculating zone can stablize burning, and reinforcing the intensity of swirl flow and ionization in cavity by plasma-induced flowing generates
Active group, can promote combustion zone blending of falling liquid film, improve combustion state, strengthen burning stability, shorten the length of flame, reach
Stablize range of operation, raising efficiency of combustion, the effect for reducing combustion chamber axial dimension to burner is widened, solves wide-angle expansion
The combustion instability problem that section occurs, can also solve the problems, such as the combustion instability that lower heat of combustion fuel occurs.
The plasma cavity expansion segment of the present invention be it is a kind of can be with strengthen burning stability, the knot for preventing burner flame-out
Structure, especially suitable for various industrial burners such as gas turbine burner, boiler-burner, chemical industry burners.
In an exemplary embodiment of the present invention, it is proposed that a kind of plasma cavity expansion segment.Fig. 1 is the present invention
Plasma cavity expansion segment structural schematic diagram；Fig. 2 is the right side partial enlargement of plasma cavity expansion segment shown in Fig. 1
Figure；Fig. 3 is the left side partial enlarged view of plasma cavity expansion segment shown in Fig. 1.Fig. 1 to Fig. 3 is please referred to, the plasma is recessed
Chamber expansion segment includes：Expansion segment 10, high voltage power supply 20, high-field electrode 30, grounding electrode 40 and electrode connecting line 50.Wherein, it expands
Section 10 is in pyramid type hollow structure, is prepared by insulating materials such as ceramics, quartz glass, its underpart passes through flange and burner outlet
It is connected, for limiting flame range, strengthening energy transmission, stable burning.The medium position in expansion segment is arranged in cavity 11, uses
In generation recirculating zone, stablize burning.Arrangement high-field electrode 30 and grounding electrode 40 in cavity.High-field electrode 30 and grounding electrode 40
For generating plasma, plasma can stablize burning with induced flow, heating fluid, generation active particle.High pressure
Electrode 30 is connected by high-field electrode knit-lines 52 and high-field electrode binding post 51 with the high-pressure side 21 of high voltage power supply 20；It connects
Ground electrode 40 is connected by grounding electrode knit-lines 53 and grounding electrode binding post 54 with the high-pressure side 22 of high voltage power supply 20.
High voltage power supply 20 is used to provide High Level AC Voltage for high-field electrode 30 and grounding electrode 40.
Preferably, the material of expansion segment 10 is ceramics or quartz glass, thickness is further excellent between 0.1-20mm
Selected introductions are between 1-10mm, still further preferably between 2-8mm.
Preferably, the output voltage of high voltage power supply 20 is 500V-50kV, output frequency 100-200kHz；Output wave
Shape is sine wave, square wave, sawtooth wave or impulse wave.
Preferably, high-field electrode 30 and grounding electrode 40 are arranged using alternative form, electrode material can be copper, tungsten or
Molybdenum.
Preferably, the number of high-field electrode 30 and grounding electrode 40 is between 1-100, further preferably 1-10 it
Between, much further preferably between 2-5.
Preferably, 11 section of cavity can be circular arc type, triangle, quadrangle or more side shape, further preferably
It is semicircle.
In the present embodiment, 5 high-field electrodes 30 and 5 grounding electrodes 40 are arranged in cavity 11, wherein adjacent one
A high-field electrode 30 and a grounding electrode 40 just constitute a dielectric barrier discharge plasma driver.Fig. 4 be it is equal from
Daughter induced flow schematic diagram, please refers to Fig. 4, and the high-field electrode 30 of interlaced arrangement ionizes after connecting high-voltage electricity with grounding electrode 40
Neighbouring fluid generates plasma, and plasma can be to heat fluid, generate in active particle, induced flow, reinforcement cavity
Vortex movement, can promote combustion zone blending of falling liquid film, improve combustion state, strengthen burning stability, shorten the length of flame.It is recessed
Plasma-induced flowing in chamber please refers to Fig. 5, and plasma-induced flowing can strengthen the swirl flow in cavity.In addition
Plasma with heat gas and can generate various active particle, and active particle plays important function in combustion reaction, this
It is that the chemical reaction because of oxidized, especially chain reaction are carried out by the active centre (chain carrier) of generation, these work
Change center is typically atom and group isoreactivity particle, and the speed of chain reaction depends on the dense of active particle in combustion zone
Degree.Therefore, if generating plasma using electric discharge before combustion, ignition action can be played；During combustion reaction, profit
With the synergy of cavity and plasma, can play to stablize to burn prevents flame-out effect.
So far, attached drawing is had been combined the present embodiment is described in detail.According to above description, those skilled in the art
There should be clear understanding to the plasma cavity expansion segment of the present invention.In addition, the above-mentioned definition to each element and method
It is not limited in various concrete structures, shape or the mode mentioned in embodiment, those of ordinary skill in the art can carry out it
It simply changes or replaces.
In conclusion the plasma cavity expansion segment of the present invention can be used for the industries such as aviation, chemical industry, power generation, metallurgy, energy
Gas turbine combustion instability problem is enough solved, while combustion chamber axial dimension can be reduced, improve efficiency of combustion.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical solution and advantageous effect
Describe in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the protection of the present invention
Within the scope of.
Claims (12)
1. a kind of burner outlet expansion segment, which is characterized in that including：
The medium position in the burner outlet expansion segment is arranged in cavity, for generating recirculating zone, stablizing burning；
High-field electrode and grounding electrode are located in the cavity, for generating plasma；
High voltage power supply or high voltage power supply binding post, for providing High Level AC Voltage for the high-field electrode and grounding electrode.
2. burner outlet expansion segment as described in claim 1, which is characterized in that the burner outlet expansion segment is in circular cone
Type hollow structure is connected by flange with burner outlet.
3. burner outlet expansion segment as described in claim 1, which is characterized in that the burner outlet expansion segment is by ceramics
Or prepared by quartz glass.
4. burner outlet expansion segment as described in claim 1, which is characterized in that the thickness of the burner outlet expansion segment
Between 0.1mm-20mm.
5. burner outlet expansion segment as described in claim 1, which is characterized in that the section of the cavity is circular arc type, three
Angular, quadrangle or pentagon.
6. burner outlet expansion segment as described in claim 1, which is characterized in that the high-field electrode is converged by high-field electrode
Zygonema and high-field electrode binding post are connected with the high-pressure side of the high voltage power supply；The grounding electrode is converged by grounding electrode
Line and grounding electrode binding post are connected with the ground terminal of the high voltage power supply.
7. burner outlet expansion segment as described in claim 1, which is characterized in that the high-field electrode is used with grounding electrode
Alternative form is arranged in pairs.
8. burner outlet expansion segment as claimed in claim 7, which is characterized in that pair of the high-field electrode and grounding electrode
Number is between 1-100.
9. burner outlet expansion segment as described in claim 1, which is characterized in that the material of the high-field electrode and grounding electrode
Material is respectively independently selected from copper, tungsten or molybdenum.
10. burner outlet expansion segment as described in claim 1, which is characterized in that the output voltage of the high voltage power supply is
500V-50kV, output frequency 100-200kHz, output waveform are sine wave, square wave, sawtooth wave or impulse wave.
11. a kind of burner using the burner outlet expansion segment as described in claims 1 to 10 any one.
12. burner as claimed in claim 11, the burner is gas turbine burner, boiler-burner or chemical furnace
Burner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511006110.XA CN105423296B (en) | 2015-12-29 | 2015-12-29 | A kind of burner outlet expansion segment and use its burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511006110.XA CN105423296B (en) | 2015-12-29 | 2015-12-29 | A kind of burner outlet expansion segment and use its burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105423296A CN105423296A (en) | 2016-03-23 |
| CN105423296B true CN105423296B (en) | 2018-08-10 |
Family
ID=55501694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511006110.XA Active CN105423296B (en) | 2015-12-29 | 2015-12-29 | A kind of burner outlet expansion segment and use its burner |
Country Status (1)
| Country | Link |
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| CN (1) | CN105423296B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864765B (en) * | 2016-03-25 | 2018-10-09 | 中国科学院工程热物理研究所 | Nozzle, nozzle array with Plasma Actuator and burner |
| CN107477612B (en) * | 2017-07-20 | 2019-09-24 | 中国科学院工程热物理研究所 | Burner |
| CN107477611B (en) * | 2017-07-20 | 2019-08-09 | 中国科学院工程热物理研究所 | Burner |
| CN114992673A (en) * | 2022-06-10 | 2022-09-02 | 中国科学院工程热物理研究所 | Nozzle capable of inhibiting oscillation combustion of combustion chamber |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB862243A (en) * | 1958-01-22 | 1961-03-08 | Gen Thermique Procedes Brola | Fuel burning system having an improved ignition arrangement |
| GB1329840A (en) * | 1969-12-29 | 1973-09-12 | Snecma | Device for burning the unsburnt residues in the exhaust gases of heat engines |
| AU8899982A (en) * | 1981-10-02 | 1983-04-14 | Christopher John Abell | Mixing nozzles for fluid flow |
| CN102162644A (en) * | 2010-02-24 | 2011-08-24 | 中国科学院工程热物理研究所 | Dielectric barrier discharge plasma swirling device |
| CN102927570A (en) * | 2011-08-12 | 2013-02-13 | 中国科学院工程热物理研究所 | Dielectric barrier discharge plasma axial rotational flow device |
| CN103133144A (en) * | 2011-12-02 | 2013-06-05 | 中国科学院工程热物理研究所 | On-duty flame device |
-
2015
- 2015-12-29 CN CN201511006110.XA patent/CN105423296B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB862243A (en) * | 1958-01-22 | 1961-03-08 | Gen Thermique Procedes Brola | Fuel burning system having an improved ignition arrangement |
| GB1329840A (en) * | 1969-12-29 | 1973-09-12 | Snecma | Device for burning the unsburnt residues in the exhaust gases of heat engines |
| AU8899982A (en) * | 1981-10-02 | 1983-04-14 | Christopher John Abell | Mixing nozzles for fluid flow |
| CN102162644A (en) * | 2010-02-24 | 2011-08-24 | 中国科学院工程热物理研究所 | Dielectric barrier discharge plasma swirling device |
| CN102927570A (en) * | 2011-08-12 | 2013-02-13 | 中国科学院工程热物理研究所 | Dielectric barrier discharge plasma axial rotational flow device |
| CN103133144A (en) * | 2011-12-02 | 2013-06-05 | 中国科学院工程热物理研究所 | On-duty flame device |
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| Publication number | Publication date |
|---|---|
| CN105423296A (en) | 2016-03-23 |
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