CN102538017A - Centrifugal fuel nozzle capable of preventing carbon from being deposited - Google Patents
Centrifugal fuel nozzle capable of preventing carbon from being deposited Download PDFInfo
- Publication number
- CN102538017A CN102538017A CN2012100332258A CN201210033225A CN102538017A CN 102538017 A CN102538017 A CN 102538017A CN 2012100332258 A CN2012100332258 A CN 2012100332258A CN 201210033225 A CN201210033225 A CN 201210033225A CN 102538017 A CN102538017 A CN 102538017A
- Authority
- CN
- China
- Prior art keywords
- nozzle
- fuel nozzle
- carbon
- centrifugal
- carbon deposit
- 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.)
- Pending
Links
Images
Landscapes
- Nozzles For Spraying Of Liquid Fuel (AREA)
Abstract
The invention relates to a fuel nozzle applied to the field of combustion, in particular to a centrifugal fuel nozzle capable of preventing carbon from being deposited. Aiming at the characteristic that the carbon is easily deposited in the centrifugal nozzle, the invention provides a scheme for connecting the conventional fuel nozzle and a sleeve according to a requirement of a combustion device on carbon gathering prevention of the nozzle; and an aim that the carbon cannot be deposited in the fuel nozzle during working for a long time is fulfilled by reducing heat flow transmitted to the fuel nozzle. The centrifugal fuel nozzle capable of preventing the carbon from being deposited is adopted in a certain super-combustion stamping engine, and a good effect is achieved; and furthermore, the centrifugal fuel nozzle capable of preventing the carbon from being deposited can be applied to combustion devices such as aircraft engines, internal combustion engines and the like.
Description
Technical field
The present invention relates to a kind of fuel nozzle that is applied to combustion field, relate in particular to a kind of centrifuging temperature nozzle that can effectively prevent carbon deposit.
Background technology
Fuel nozzle is one of key equipment of burners such as Aero-Space engine, internal combustion engine; It mainly acts on is to change into small drop to fuel spray; The mixing and burning of oxidant in realization and the combustion chamber; Described oxidant is generally liquid oxygen or dinitrogen tetroxide in airspace engine, in other engine, be generally air.
The centrifuging temperature nozzle relies on that rotation produces liquid film in the process fluid flow, and liquid film is atomized into small drop under aerodynamic force or surface tension effects, has good, the advantage such as be evenly distributed of atomizing effect, in various burners, widely adopts.But, and continue to nozzle and interior mobile fuel Heating thereof, in case heating-up temperature reaches the fuel oil splitting decomposition temperature because the high temperature in the combustion chamber can be delivered to nozzle; Make fuel oil splitting decomposition and in nozzle, form carbon deposit, the carbon deposit in the nozzle can influence the atomization and spraying distribution character of nozzle, reduces the efficiency of combustion in the combustion chamber; Cause fuel flow path to diminish simultaneously; Thereby the reduction fuel flow further quickens the formation of carbon deposit, when serious even can cause stopping working.
Chinese patent " a kind of anti-carbon deposit liquid fuel nozzle that is used for gas turbine " (application number: 201020179121.4) announced the fuel nozzle that prevents to occur carbon deposit at nozzle face; It carries out cooling protection through the air blowing mode to nozzle; Avoid high-temperature fuel gas to be back to nozzle face, to reach the purpose that prevents carbon deposit.The shortcoming of such scheme is: on the one hand, the hot-fluid of high-temperature fuel gas is not only to be delivered on the nozzle from end face, and circumferentially also has the hot-fluid transmission to come at nozzle, and it is not enough therefore only protecting nozzle face; On the other hand, owing to adopt the air blowing mode need increase the supply and the control loop of scavenger system, thus increased the complexity of whole system.
Chinese patent " with the method for rare earth oxide coating fire resistant oil nozzle assembly carbon distribution " (application number: 200910060259.4) announced that a kind of rare earth catalyst that adopts quickens the method that fuel oil decomposes.It plates the anti-carbon deposit coating of rare earth oxide through retrofit fuel nozzle inner surface and at inner surface, makes fuel oil form gaseous products, and reduces colloid and carbon deposit formation probability.It is overheated this essential reason of fuel oil that this method does not solve carbon deposit formation, and in addition, coating loss also can reduce the service life of nozzle.
Summary of the invention
The present invention is directed to the characteristics of carbon trumpet, to the anti-carbon requirement of nozzle, proposed the scheme of the traditional fuel nozzle joint sleeve of a kind of usefulness,, make it reach the not purpose of carbon deposit that works long hours through reducing to transmit the hot-fluid of fuel nozzle according to burner.
Technical scheme of the present invention is following:
A kind of centrifugal anti-carbon deposit fuel nozzle is made up of centrifugal inner nozzle and sleeve pipe;
The structure of said centrifugal inner nozzle, operation principle and method for designing are that engine art is known, can be referring to " liquid-propellant rocket engine design (on) " (Zhu Ningchang, Yuhang Publishing House,, PP370～380 in 1994);
Said sleeve pipe is trapezoidal body of revolution structure, and the upper end is columnar structured, and casing inner diameter is the external diameter of centrifugal inner nozzle, and is preferred, and the cover external diameter of pipe is than the big 2～6mm of internal diameter;
For avoiding forming excessive recirculating zone, prevent fuel gas return-flow to end face, and be delivered in the nozzle at end face; The sleeve pipe lower end is a taper body of revolution structure; Awl point and inner nozzle end face, the angle of awl bus and axis generally are chosen for 30～60 degree, are preferably 40～50 degree; The sleeve pipe total length is the same with inner nozzle length.
The thickness of sleeve pipe confirms that by requirement of strength its method for designing is the structural design known.
The material of said centrifugal inner nozzle and vacuum sleeve is stainless steel, can connect with welding manner, also can adopt engage thread to connect.
According to different instructions for uses, can seal between sleeve pipe and the inner nozzle and be vacuum, atmospheric air or nitrogen, wherein, the effect of heat insulation of sealing vacuum is best.
The inner nozzle housing directly contacted with the hot wall face originally; After adopting the present invention, the inner nozzle housing contacts with wall through vacuum sleeve, is completely cut off by sleeve pipe or is reduced to very low level from the hot-fluid of wall; Its heat is difficult to be delivered on the fuel oil that inner nozzle and Qi Nei flow; Fuel oil temperature will remain than low value, can not reach the fuel oil splitting decomposition temperature, thereby can effectively prevent carbon deposit.
Adopt the present invention can obtain following technique effect:
The present invention adopts on certain scramjet engine and obtains good result, also may be used on burners such as aero-engine, internal combustion engine.
Description of drawings
Fig. 1: existing centrifuging temperature nozzle arrangements sketch map;
Fig. 2: centrifugal anti-carbon deposit fuel nozzle of the present invention;
Fig. 3: do not adopt carbon deposit to occur when of the present invention, fuel flow sharply descends;
Fig. 4: after adopting the present invention, carbon deposit does not take place, fuel flow is steady.
Reference numeral
1. fuel oil
2. centrifugal inner nozzle
3. the carbon deposit that generates
4. hot-fluid
5. vacuum sleeve
6. the gas of vacuum or sealing
The specific embodiment
Fig. 1 is existing centrifuging temperature nozzle arrangements sketch map.Fuel oil 1 flows into from upper end of nozzle, enters into inner nozzle 2, is injected in the combustion chamber through a helical duct.The hot-fluid 4 that imports inner nozzle 2 into comprises the fuel gas calorie that imports into from end face and imports the heat of inner nozzle 2 from side wall surface into shown in arrow among the figure.These heats will cause carbon deposit 3 occurring in the nozzle constriction point, in case carbon deposit 3 occurs, the flow of fuel oil 1 will diminish, and quicken the formation of carbon deposit, and stop up whole passage.
Fig. 2 is a centrifugal anti-carbon deposit fuel nozzle of the present invention.It is on centrifuging temperature inner nozzle 2 bases shown in Figure 1, coats vacuum sleeve 5, to reduce to import into from sidewall the heat of fuel oil 1.
Fig. 3 does not adopt carbon deposit to occur when of the present invention, and fuel flow sharply descends; Flow was than stationary value 0.145kg/s in the time of 5 seconds, and owing to the carbon deposit reason, flow sharply descends subsequently, and flow has dropped to 15% of setting value during by 30 seconds.Flow is not reduced to 0 reason fully: because flow is low excessively, engine is flame-out, does not have high-temperature heat flux to continue to be delivered to nozzle.
Carbon deposit after adopting the present invention, does not take place in Fig. 4, and fuel flow is steady.High flow when initial causes owing to fuel oil flows suddenly in pipeline, closes fuel oil in the time of 310 seconds, and flow is steady in whole process, explains carbon deposit does not take place.
Claims (5)
1. a centrifugal anti-carbon deposit fuel nozzle is made up of centrifugal inner nozzle and sleeve pipe, and said sleeve pipe is trapezoidal body of revolution structure; The upper end is columnar structured; Internal diameter is the external diameter of centrifugal inner nozzle, and the sleeve pipe lower end is a taper body of revolution structure, awl point and inner nozzle end face; The angle of awl bus and axis is 30～60 degree, and the sleeve pipe total length is the same with inner nozzle length.
2. the described centrifugal anti-carbon deposit fuel nozzle of claim 1 is characterized in that: overlap external diameter of pipe than the big 2～6mm of casing inner diameter.
3. claim 1 or 2 described centrifugal anti-carbon deposit fuel nozzles is characterized in that: the angle of awl bus and axis is 40～50 to spend.
4. the described centrifugal anti-carbon deposit fuel nozzle of claim 3 is characterized in that: the angle of awl bus and axis is 45 to spend.
5. claim 1 or 2 described centrifugal anti-carbon deposit fuel nozzles is characterized in that: a kind of in vacuum, atmospheric air or the nitrogen of sealing between sleeve pipe and the inner nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100332258A CN102538017A (en) | 2012-02-15 | 2012-02-15 | Centrifugal fuel nozzle capable of preventing carbon from being deposited |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100332258A CN102538017A (en) | 2012-02-15 | 2012-02-15 | Centrifugal fuel nozzle capable of preventing carbon from being deposited |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102538017A true CN102538017A (en) | 2012-07-04 |
Family
ID=46345571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100332258A Pending CN102538017A (en) | 2012-02-15 | 2012-02-15 | Centrifugal fuel nozzle capable of preventing carbon from being deposited |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102538017A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520756A (en) * | 2020-03-25 | 2020-08-11 | 西北工业大学 | Variable cross-section centrifugal nozzle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86207418U (en) * | 1986-10-09 | 1987-09-09 | 西北电业管理局电力试验研究所 | Coal-powder direct ignition burner |
| US4817873A (en) * | 1985-11-13 | 1989-04-04 | Orbital Engine Company Proprietary Limited | Nozzles for in-cylinder fuel injection systems |
| CN1150629A (en) * | 1995-08-17 | 1997-05-28 | 三菱电机株式会社 | Liquid fuel combustion device |
| US20100051724A1 (en) * | 2008-08-27 | 2010-03-04 | Woodward Governor Company | Dual Action Fuel Injection Nozzle |
| CN201635897U (en) * | 2010-03-03 | 2010-11-17 | 常州海川卓越密封材料有限公司 | Insulation jacket for sheathing on oil spraying nozzle |
-
2012
- 2012-02-15 CN CN2012100332258A patent/CN102538017A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4817873A (en) * | 1985-11-13 | 1989-04-04 | Orbital Engine Company Proprietary Limited | Nozzles for in-cylinder fuel injection systems |
| CN86207418U (en) * | 1986-10-09 | 1987-09-09 | 西北电业管理局电力试验研究所 | Coal-powder direct ignition burner |
| CN1150629A (en) * | 1995-08-17 | 1997-05-28 | 三菱电机株式会社 | Liquid fuel combustion device |
| US20100051724A1 (en) * | 2008-08-27 | 2010-03-04 | Woodward Governor Company | Dual Action Fuel Injection Nozzle |
| CN201635897U (en) * | 2010-03-03 | 2010-11-17 | 常州海川卓越密封材料有限公司 | Insulation jacket for sheathing on oil spraying nozzle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520756A (en) * | 2020-03-25 | 2020-08-11 | 西北工业大学 | Variable cross-section centrifugal nozzle |
| CN111520756B (en) * | 2020-03-25 | 2022-03-15 | 西北工业大学 | Variable cross-section centrifugal nozzle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204063127U (en) | Combustion gas turbine and the system for controlling compression working fluid flow velocity | |
| EP2813684B1 (en) | Continuous ignition | |
| CN101278152B (en) | Fuel nozzle having swirler-integrated radial fuel jet | |
| CN102563701B (en) | Premixing nozzle | |
| CN109441643B (en) | Micro-turbojet engine and ignition device for combustion chamber of gas turbine | |
| CN110186069B (en) | Combustion heater | |
| US10955140B2 (en) | Combustor for gas turbine engine | |
| US4412808A (en) | Dual fueled burner gun | |
| CN105051458A (en) | Combustor and gas turbine | |
| CN105008685A (en) | Exhaust treatment burner and mixer system | |
| EP2778533B1 (en) | Combustor for gas turbine engine | |
| CN101852148A (en) | Oxygen/kerosene ignitor using pneumatic resonance ignition technology | |
| CN111120148B (en) | Premixed propellant injector integrating ignition and anti-backfire functions | |
| US9677766B2 (en) | Fuel nozzle for use in a turbine engine and method of assembly | |
| CN110594743B (en) | Mixed fuel burner for burning low-heat-value waste gas by using high-heat-value waste liquid | |
| CN107100740B (en) | Air-flow compresses directional cumulation plasma arc ignition burner | |
| KR20170001970A (en) | Oil burner with decomposition chamber | |
| CN211625257U (en) | Mixed fuel burner for burning low-calorific-value waste gas by using high-calorific-value waste liquid | |
| CN102538017A (en) | Centrifugal fuel nozzle capable of preventing carbon from being deposited | |
| CN102563705A (en) | Direct-flow fuel nozzle capable of preventing carbon deposit | |
| CN103339443B (en) | For the spraying system of turbine engine combustion chamber | |
| CN109057993B (en) | Plasma spray combustion device with electrode cooling function | |
| WO2019188409A1 (en) | Combustion device and gas turbine | |
| CN210601749U (en) | Alcohol combustion stove | |
| CN114151200A (en) | Igniter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120704 |