CN102748775B - Streamline flame stabilizer with built-in ignition sources - Google Patents
Streamline flame stabilizer with built-in ignition sources Download PDFInfo
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- CN102748775B CN102748775B CN201210255006.4A CN201210255006A CN102748775B CN 102748775 B CN102748775 B CN 102748775B CN 201210255006 A CN201210255006 A CN 201210255006A CN 102748775 B CN102748775 B CN 102748775B
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- afterbody
- tail
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Abstract
The invention discloses a streamline flame stabilizer with built-in ignition sources. The streamline flame stabilizer mainly consists of a streamline body and a streamline tail cover, wherein the tail cover is inserted into the tail part of the body; the front end of the body is provided with a head cavity, and the middle part of the body is provided with a central cavity; a tail cavity is arranged in the tail cover, and the central cavity and the tail cavity are communicated through a main runner; the central cavity is communicated with a plurality of air sucking ports arranged on the outer wall of the body through branch runners, and the tail cavity is communicated with some air sucking holes formed in the surface of the tail cover; the junction part of the body and the rail cover is provided with a circular steering flow small channel which is communicated with the main runner; and a front most position of the body and the front end of the head cavity are communicated through an air inlet pipeline, and an inlet of the pipeline is provided with a flow regulation valve. According to the streamline flame stabilizer, a plurality of small ignition sources can be generated by utilizing an inner cavity of a streamline object to ignite inflammable mixture gas and maintain the stability of flames so as to realize the streamline flame stabilizer having the advantages of small flow resistance, good flame stability and good combustion performance.
Description
Technical field
The invention belongs to field of combustion technology, particularly relate to a kind of streamlined flameholder of built-in incendiary source.
Background technology
From the beginning of the forties in last century so far, the basic principle that correlative study both at home and abroad stabilizes the flame in high velocity air is to adopt the object of the blunt form with larger resistance to make to form recirculating zone under high velocity air stagnation, utilizes the high-temperature fuel gas of recirculating zone to light gaseous mixture to maintain the stable of flame.Wherein modal bluff body flameholder is V-flame stabilizer, it has good effect aspect stability, but aspect pitot loss, pay no small cost, this is very disadvantageous to supersonic speed and hypersonic speed engine, and this shortcoming makes V-flame stabilizer can not meet the requirement of modern advanced aero engine combustion chamber.Famous scientist's Qian Xuesen once proposed the method for utilizing high-temperature stream linear object to stabilize the flame.The method is that the boundary layer that utilizes gas to form in streamliner surface stabilizes the flame, and thermaltransmission mode by heat conduction the heat of high-temperature product from flameholder tail transfer to head, go on to maintain burning thereby constantly light fresh premix gas.But unsatisfactory owing to utilizing streamlined body surface boundary layer to stabilize the flame, be also difficult to meet ignition institute energy requirement and carry out transferring heat by heat-conducting mode, the practicality that therefore the method also needs further research and discussion to pay at present.
Summary of the invention
The object of the invention is to carry out structural design for streamlined body, make streamliner intracoelomic cavity produce ignite combustion mixture maintain the stable of flame of multiple small-sized incendiary sources, and realize that a kind of flow resistance is very little, flame holding is good, combustibility good stream shape flameholder, thereby meet the requirement of modern Aviation supersonic speed and hypersonic speed engine chamber.
For realizing above-mentioned object, technical solution of the present invention is:
The present invention is a kind of streamlined flameholder of built-in incendiary source, and it comprises body, hood, control valve; Described body and the profile of hood are streamlined, and hood is plugged on the afterbody of body; The front end of described body is provided with head cavity, middle part is provided with center cavity, longitudinally offers a sprue that is through to body afterbody from center cavity in body, and this sprue is connected with the afterbody cavity arranging in hood; Multiple bleeding points around periphery are offered at interval, maximum gauge place at body outer wall, and multiple bleeding points are connected with center cavity by many smooth runners respectively, and the afterbody of body is pointed in runner outlet; Some suction holes are arranged on hood surface, and suction hole directly communicates with afterbody cavity and the total flow area of suction hole is less than the total flow area of bleeding point; Have an annular at body and the meet of hood and turn to the passage aisle that flows to be connected with body sprue, passage aisle elbow is smooth smooth; Body foremost position is connected by an admission line with head cavity front end, and in conduit entrance, flow control valve is set; Hemispherical wire guard, by many balanced discharge ducts and many runners corresponding communicating one by one of arranging, is installed in the exit of discharge duct in head cavity rear end.
Adopt after such scheme, when the present invention has following advantage:
1, air current flow resistance is very little.Because it is streamlined that the profile of the body of flameholder and hood is all, therefore the flow resistance being subject to when air flow stream is crossed flameholder is very little.
2, flame holding is good.The viscous force effect that utilizes the gas of flameholder body bleeding point to be subject to is greater than the viscous force effect that the gas of hood suction hole is subject to, form a high temperature recirculation zone in the central lumen of flameholder, for the ignition of combustion mixture provides high temperature continuous thermal source.Low discharge combustion mixture by many discharge ducts is lighted by high temperature reflux flue gas in runner, and the root of flame is stabilized on the wire of hemispherical wire guard, forms the good ignition flame of stability.The red-hot air-flow that ignition flame produces is drawn out of and injects the primary air of flameholder outside from bleeding point with high temperature reflux flue gas, makes outside primary air occur burn and maintain flame stabilization.
3, combustibility is good.The high-temperature flue gas of flameholder body and hood meet has certain flow velocity, under kinetic energy effect, entering annular turns to the passage aisle that flows to be back to center cavity, thereby ensure to have enough backflow flue gas amounts to heat combustion mixture, greatly improved the combustibility of flameholder.
In sum, advantage of the present invention: the features such as air current flow resistance is very little, flame holding is good, combustibility is good, are applicable to applying to modern Aviation supersonic speed and hypersonic speed engine chamber.
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated.
Brief description of the drawings
Fig. 1 is profile of the present invention;
Fig. 2 is front view of the present invention;
Fig. 3 is left view of the present invention;
Fig. 4 is fundamental diagram of the present invention.
Detailed description of the invention
As shown in Figure 1, Figure 2, Figure 3 shows.The present invention is a kind of streamlined flameholder of built-in incendiary source, and it comprises body 1, hood 2, hemispherical wire guard 3, control valve 4.
Described body 1 and the profile of hood 2 are streamlined.Described hood 2 is plugged on the afterbody of body 1.
The front end of described body 1 is provided with head cavity 11, middle part is provided with center cavity 12, longitudinally offers a sprue 13 that is through to body 1 afterbody from center cavity 12 in body 1, this sprue 13 with in hood 2, be provided with the afterbody cavity 21 of putting and be connected.
Offer multiple bleeding points 14 around periphery at the interval, maximum gauge place of body 1, multiple bleeding points 14 are connected with center cavity 12 by many smooth runners 15 respectively, and the afterbody of body 1 is pointed in runner 15 outlets.Some suction holes 22 are arranged on hood 2 surfaces, and suction hole 22 directly communicates with afterbody cavity 21, and the total flow area of suction hole 22 is less than the total flow area of bleeding point 14.Have an annular at body 1 and the meet of hood 2 and turn to the passage aisle 23 that flows to be connected with body sprue 13, passage aisle 23 elbows are smooth smooth.Body 1 foremost position is connected by an admission line 16 with head cavity 11 front ends, and in conduit entrance, flow control valve 4 is set.Head cavity 11 rear ends are inside corresponding the communicating one by one with many runners 15 by many balanced discharge ducts 17 of arranging, discharge duct 17 points to bleeding point 14 centers.In the exit of discharge duct 17, hemispherical wire guard 3 is installed.
Operation principle of the present invention:
As shown in Figure 4, when flameholder of the present invention is placed in combustion mixture stream at a high speed, the gas of flameholder body bleeding point 14 and the gas of hood suction hole 22 are all subject to the viscous force effect of high velocity air.Because bleeding point 14 is positioned at body 1 maximum gauge place, the air velocity of bleeding point 14 tops reaches maximum, be far longer than the air velocity of hood 2 suction hole 22 tops, and the total flow area of bleeding point 14 is greater than the total flow area of suction hole 22, bleeding point 14 places are subject to the gas volume of viscous force effect to be greater than suction hole 22 places to be subject to the gas volume of viscous force effect, and therefore the viscous force effect of air-flow is mainly reflected in bleeding point 14 places of flameholder.Under viscous force effect, the gas of center cavity 12 is drawn out of from bleeding point 14 by runner 15, causes center cavity 12 in very low static pressure, and this pressure is less than the pressure of flameholder afterbody cavity 21.Under this differential pressure action, afterbody high-temperature flue gas is inhaled into afterbody cavity 21 from suction hole 22, and be back to center cavity 12 by internal main runner 13, finally by the high velocity gas stream outside bleeding point 14, form thus a high temperature recirculation zone in the inside of flameholder.The shallow bid combustion mixture stream in flameholder front flows into head cavity 11 by admission line 16, and because the reason of flow area sudden expansion reduces at the interior air-flow velocity of head cavity 11, pressure raises.The inflammable gas-flow that enters head cavity 11 is controlled by flow control valve 4, and the gas pressure in control head cavities 11 thus.Due to the viscous force effect of bleeding point 14 top high velocity airs, runner 15 pressure are very low, and the combustion mixture in head cavity 11 flows into each runner 15 by each discharge duct 17 under differential pressure action.Combustion mixture bumps and carries out strong heat and mass exchange with the high temperature reflux flue gas of runner 15 in blast pipe 17 outlets, and combustion mixture temperature improves, catch fire and reach, and burning.Because wire afterbody forms combustion product recirculating zone, therefore the root of flame is stabilized on the wire of hemispherical wire guard 3, forms the good ignition flame of stability.The red-hot air-flow that ignition flame produces is drawn out of and injects the outside primary air of flameholder from bleeding point 14 continuously, and outside primary air temperature is improved, and catches fire, burns, thereby ensure outside primary air flame stabilization and reach.Flameholder surface body 1 has certain flow velocity with the high-temperature flue gas of 2 two kinds of appearance curve meets of hood, under kinetic energy effect, entering annular turns to the passage aisle 23 that flows to be back to center cavity 12, thereby ensure to have enough backflow flue gas amounts to heat combustion mixture, greatly improved the combustibility of flameholder.
The above, be only preferred embodiment of the present invention, therefore can not limit scope of the invention process with this, the equivalence of doing according to the present patent application the scope of the claims and description changes and modifies, and all should still remain within the scope of the patent.
Claims (3)
1. a streamlined flameholder for built-in incendiary source, is characterized in that: it comprises body, hood, control valve; Described body and the profile of hood are streamlined, and hood is plugged on the afterbody of body; The front end of described body is provided with head cavity, middle part is provided with center cavity, longitudinally offers a sprue that is through to body afterbody from center cavity in body, and this sprue is connected with the afterbody cavity arranging in hood; Offer multiple bleeding points around periphery at body outer wall interval, multiple bleeding points are connected with center cavity by many smooth runners respectively, and the afterbody of body is pointed in runner outlet; Some suction holes are arranged on hood surface, and suction hole directly communicates with afterbody cavity and the total flow area of suction hole is less than the total flow area of bleeding point; Have an annular at body and the meet of hood and turn to the passage aisle that flows to be connected with body sprue, passage aisle elbow is smooth smooth; Body foremost position is connected by an admission line with head cavity front end, and in conduit entrance, flow control valve is set; Head cavity rear end is by many balanced discharge ducts and many runners corresponding communicating one by one of arranging.
2. the streamlined flameholder of built-in incendiary source according to claim 1, is characterized in that: multiple bleeding points around periphery are offered at the interval, maximum gauge place at body outer wall.
3. the streamlined flameholder of built-in incendiary source according to claim 1, is characterized in that: also comprise hemispherical wire guard, this hemispherical wire guard is arranged on the exit of body discharge duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210255006.4A CN102748775B (en) | 2012-07-23 | 2012-07-23 | Streamline flame stabilizer with built-in ignition sources |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210255006.4A CN102748775B (en) | 2012-07-23 | 2012-07-23 | Streamline flame stabilizer with built-in ignition sources |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102748775A CN102748775A (en) | 2012-10-24 |
| CN102748775B true CN102748775B (en) | 2014-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210255006.4A Expired - Fee Related CN102748775B (en) | 2012-07-23 | 2012-07-23 | Streamline flame stabilizer with built-in ignition sources |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3062019B1 (en) * | 2015-02-27 | 2018-11-21 | Ansaldo Energia Switzerland AG | Method and device for flame stabilization in a burner system of a stationary combustion engine |
| CN104776448B (en) * | 2015-03-11 | 2017-01-18 | 北京航空航天大学 | Multifunctional mode adjustable flame stabilizing supporting plate |
| CN104879782A (en) * | 2015-05-18 | 2015-09-02 | 西北工业大学 | Novel asymmetric flame stabilizer |
| EA036037B1 (en) * | 2017-12-28 | 2020-09-16 | Некоммерческое Акционерное Общество "Алматинский Университет Энергетики И Связи" | Two-staged combustion chamber |
| CN110081463A (en) * | 2019-01-18 | 2019-08-02 | 西北工业大学 | A kind of flameholder premixed with edge of a wing turbulence structure |
| 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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| JPH0874661A (en) * | 1994-08-31 | 1996-03-19 | Ishikawajima Harima Heavy Ind Co Ltd | Ram combustion device |
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| CN101078518A (en) * | 2006-05-26 | 2007-11-28 | 北京大学 | Flame stabilizing burner |
| CN101144430A (en) * | 2007-10-19 | 2008-03-19 | 北京航空航天大学 | Tower type flame holder for rotor engine |
| CN101737802A (en) * | 2009-11-27 | 2010-06-16 | 北京航空航天大学 | Central cavity stable fire tangential combustion chamber |
| CN102519054A (en) * | 2012-01-06 | 2012-06-27 | 北京大学 | On-duty flame stabilizer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2935847A (en) * | 1957-11-18 | 1960-05-10 | United Aircraft Corp | Flow control means for use with flameholders and flamespreaders |
| US5617717A (en) * | 1994-04-04 | 1997-04-08 | Aero-Plasma, Inc. | Flame stabilization system for aircraft jet engine augmentor using plasma plume ignitors |
| US20110219776A1 (en) * | 2010-03-15 | 2011-09-15 | General Electric Company | Aerodynamic flame stabilizer |
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2012
- 2012-07-23 CN CN201210255006.4A patent/CN102748775B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0874661A (en) * | 1994-08-31 | 1996-03-19 | Ishikawajima Harima Heavy Ind Co Ltd | Ram combustion device |
| CN1763427A (en) * | 2005-10-14 | 2006-04-26 | 北京莱琪尔科技有限公司 | Gas flame steady burner |
| CN1793728A (en) * | 2006-01-12 | 2006-06-28 | 北京莱琪尔科技有限公司 | Gas flame smooth burning method and smooth burner |
| CN101078518A (en) * | 2006-05-26 | 2007-11-28 | 北京大学 | Flame stabilizing burner |
| CN101144430A (en) * | 2007-10-19 | 2008-03-19 | 北京航空航天大学 | Tower type flame holder for rotor engine |
| CN101737802A (en) * | 2009-11-27 | 2010-06-16 | 北京航空航天大学 | Central cavity stable fire tangential combustion chamber |
| CN102519054A (en) * | 2012-01-06 | 2012-06-27 | 北京大学 | On-duty flame stabilizer |
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| CN102748775A (en) | 2012-10-24 |
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