CN102748775A - Streamline flame stabilizer with built-in ignition sources - Google Patents
Streamline flame stabilizer with built-in ignition sources Download PDFInfo
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- CN102748775A CN102748775A CN2012102550064A CN201210255006A CN102748775A CN 102748775 A CN102748775 A CN 102748775A CN 2012102550064 A CN2012102550064 A CN 2012102550064A CN 201210255006 A CN201210255006 A CN 201210255006A CN 102748775 A CN102748775 A CN 102748775A
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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; Both at home and abroad correlative study basic principle of the retention flame in high velocity air is to adopt the object of the blunt form with big resistance to make under the high velocity air stagnation to form the recirculating zone, utilizes the high-temperature fuel gas of recirculating zone to light gaseous mixture to keep the stable of flame.Wherein modal bluff body flameholder is the V-flame stabilizer; It has good effect aspect stable; But aspect pitot loss, paid no small cost; This is very disadvantageous to supersonic speed and hypersonic speed engine, and this shortcoming makes the V-flame stabilizer can not satisfy the requirement of modern advanced aeroengine combustor buring chamber.Famous scientist's Qian Xuesen once proposed to utilize the high-temperature stream linear object to come the method for the retention flame.This method is that the retention flame is come in the boundary layer that utilizes gas to form in the streamliner surface; And the thermaltransmission mode through heat conduction the heat of high-temperature product from the flameholder tail transfer to head, go on to keep burning thereby constantly light fresh premix gas.But owing to utilize the streamlined body surface boundary layer retention flame unsatisfactory, also be difficult to satisfying the required energy of fire burns, so this method practicality of also needing further research and discussion to pay at present and transmit heat through heat-conducting mode.
Summary of the invention
The objective of the invention is to carry out structural design to streamlined body; Make the streamliner intracoelomic cavity produce ignite combustion mixture and keep the stable of flame of a plurality of small-sized incendiary sources; And realize that a kind of flow resistance is very little, flame holding good, combustibility good stream shape flameholder, thereby satisfy the requirement of modern aviation supersonic speed and hypersonic speed engine chamber.
For realizing above-mentioned purpose, 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; The profile of described body and hood is streamlined, and hood is plugged on the afterbody of body; The front end of described body is provided with head cavity, the middle part is provided with center cavity, longitudinally offers one in the body and is through to the sprue of body afterbody from center cavity, and the afterbody cavity that is provided with in this sprue and the hood is connected; Offer a plurality of a plurality of bleeding points around periphery at interval at the maximum gauge place of body outer wall, a plurality of bleeding points are connected with center cavity through many smooth runners respectively, and the afterbody of body is pointed in the runner outlet; Some suction holes of hood surface arrangement, suction hole directly communicate with the afterbody cavity and the total flow area of suction hole less than the total flow area of bleeding point; Have an annular at the body and the meet of hood and turn to the passage aisle that flows to be connected with the body sprue, the passage aisle elbow is smooth smooth; The body foremost position is connected by an admission line with the head cavity front end, and in conduit entrance flow control valve is set; The head cavity rear end communicates with many runners respectively through many balanced discharge ducts of arranging, in the exit of discharge duct hemispherical wire guard is installed.
After adopting such scheme, when the present invention has following advantage:
1, the air current flow resistance is very little.Because it is streamlined that the profile of the body of flameholder and hood all is, so the flow resistance that receives during air flow stream fire stabilizer is very little.
2, flame holding is good.The viscous force effect that utilizes viscous force effect that the gas of flameholder body bleeding point receives to receive greater than the gas of hood suction hole; Central lumen at flameholder has formed a high temperature recirculation zone, for combustion mixture fire burns provide high temperature continuous thermal source.Low discharge combustion mixture through many discharge ducts is lighted by the high temperature reflux flue gas in runner, and the root of flame is stabilized on the wire of hemispherical wire guard, forms well 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 with the high temperature reflux flue gas, makes outside primary air take place to burn and keep flame stabilization.
3, combustibility is good.The high-temperature flue gas of flameholder body and hood meet has certain flow velocity; Under the kinetic energy effect, getting into annular turns to the passage aisle that flows to be back to center cavity; Thereby guaranteed to have enough backflow exhaust gas volumns to heat combustion mixture, improved the combustibility of flameholder greatly.
In sum, advantage of the present invention: characteristics such as the air current flow resistance is very little, flame holding is good, combustibility is good are fit to apply to modern aviation supersonic speed and hypersonic speed engine chamber.
Below in conjunction with accompanying drawing and specific embodiment the present invention is further described.
Description of drawings
Fig. 1 is a profile of the present invention;
Fig. 2 is a front view of the present invention;
Fig. 3 is a left view of the present invention;
Fig. 4 is a fundamental diagram of the present invention.
The specific embodiment
Like Fig. 1, Fig. 2, shown in Figure 3.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.
The profile of described body 1 and hood 2 is 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, the middle part is provided with center cavity 12, longitudinally offers one in the body 1 and is through to the sprue 13 of body 1 afterbody from center cavity 12, is provided with the afterbody cavity of putting 21 in this sprue 13 and the hood 2 and is connected.
Offer a plurality of a plurality of bleeding points 14 around periphery at interval at the maximum gauge place of body 1, a plurality of bleeding points 14 are connected with center cavity 12 through many smooth runners 15 respectively, and the afterbody of body 1 is pointed in runner 15 outlets.Some suction holes 22 of hood 2 surface arrangement, suction hole 22 directly communicates with afterbody cavity 21, and suction hole 22 total flow areas are less than bleeding point 14 total flow areas.Have an annular at the 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 communicate with the inside of many runners 15 respectively through many balanced discharge ducts of arranging 17, and 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 placing combustion mixture at a high speed, flameholder of the present invention flows, and the gas of flameholder body bleeding point 14 and the gas of hood suction hole 22 all receive 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 holes 22 tops; And bleeding point 14 total flow areas are greater than suction hole 22 total flow areas, and the gas volume that bleeding point 14 places receive the viscous force effect receives the gas volume of viscous force effect greater than suction hole 22 places, so the viscous force effect of air-flow is mainly reflected in bleeding point 14 places of flameholder.Under the viscous force effect, the gas of center cavity 12 is drawn out of from bleeding point 14 through runner 15, causes center cavity 12 to be in very low static pressure, and this pressure is less than the pressure of flameholder afterbody cavity 21.Under this differential pressure action; The afterbody high-temperature flue gas is inhaled into afterbody cavity 21 from suction hole 22; And be back to center cavity 12 through inner sprue 13, by the outer high velocity gas stream of bleeding point 14, formed a high temperature recirculation zone thus in the inside of flameholder at last.The shallow bid combustion mixture stream in flameholder the place ahead flows into head cavity 11 through admission line 16, and owing to reason air-flow velocity reduction in head cavity 11 of flow area sudden expansion, pressure raises.The combustion mixture flow that gets into head cavity 11 is through flow control valve 4 controls, and the gas pressure in the control head cavities 11 thus.Because the viscous force effect of bleeding point 14 top high velocity airs, runner 15 pressure are very low, and the combustion mixture in the head cavity 11 flows into each runner 15 through each bar discharge duct 17 under differential pressure action.Combustion mixture bumps at the high temperature reflux flue gas of blast pipe 17 outlet and runner 15 and carries out strong heat and mass exchange, and the combustion mixture temperature improves, and catches fire burning and reach.Because the wire afterbody forms the combustion product recirculating zone, so the root of flame is stabilized on the wire of hemispherical wire guard 3 the good ignition flame of formation 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 and reach, thereby guarantee outside primary air flame stabilization.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 the kinetic energy effect, getting into annular turns to the passage aisle 23 that flows to be back to center cavity 12; Thereby guaranteed to have enough backflow exhaust gas volumns to heat combustion mixture, improved the combustibility of flameholder greatly.
The above is merely preferred embodiment of the present invention, so can not limit the scope that the present invention implements with this, the equivalence of promptly doing according to claim of the present invention and description changes and modifies, and all should still belong in the scope that patent of the present invention contains.
Claims (3)
1. the streamlined flameholder of a built-in incendiary source, it is characterized in that: it comprises body, hood, control valve; The profile of described body and hood is streamlined, and hood is plugged on the afterbody of body; The front end of described body is provided with head cavity, the middle part is provided with center cavity, longitudinally offers one in the body and is through to the sprue of body afterbody from center cavity, and the afterbody cavity that is provided with in this sprue and the hood is connected; Offer a plurality of a plurality of bleeding points around periphery at interval at the body outer wall, a plurality of bleeding points are connected with center cavity through many smooth runners respectively, and the afterbody of body is pointed in the runner outlet; Some suction holes of hood surface arrangement, suction hole directly communicate with the afterbody cavity and the total flow area of suction hole less than the total flow area of bleeding point; Have an annular at the body and the meet of hood and turn to the passage aisle that flows to be connected with the body sprue, the passage aisle elbow is smooth smooth; The body foremost position is connected by an admission line with the head cavity front end, and in conduit entrance flow control valve is set; The head cavity rear end communicates with many runners respectively through many balanced discharge ducts of arranging.
2. the streamlined flameholder of built-in incendiary source according to claim 1 is characterized in that: offer a plurality of a plurality of bleeding points around periphery at interval at the maximum gauge place of body outer wall.
3. the streamlined flameholder of built-in incendiary source according to claim 1, it is characterized in that: it also comprises hemispherical wire guard, this hemispherical wire guard is installed in 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 |
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| Publication Number | Publication Date |
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| CN102748775A true CN102748775A (en) | 2012-10-24 |
| CN102748775B 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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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776448A (en) * | 2015-03-11 | 2015-07-15 | 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 |
| 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 |
| CN105937775B (en) * | 2015-02-27 | 2020-05-15 | 安萨尔多能源瑞士股份公司 | Method and device for stabilizing the flame in a burner system of a stationary combustion engine |
| EA036037B1 (en) * | 2017-12-28 | 2020-09-16 | Некоммерческое Акционерное Общество "Алматинский Университет Энергетики И Связи" | Two-staged combustion chamber |
| CN115574347A (en) * | 2022-09-16 | 2023-01-06 | 南京航空航天大学 | Single-inlet single-standing-vortex concave cavity stabilizer for afterburner |
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- 2012-07-23 CN CN201210255006.4A patent/CN102748775B/en not_active Expired - Fee Related
Patent Citations (10)
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| 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 |
| JPH0874661A (en) * | 1994-08-31 | 1996-03-19 | Ishikawajima Harima Heavy Ind Co Ltd | Ram combustion device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105937775B (en) * | 2015-02-27 | 2020-05-15 | 安萨尔多能源瑞士股份公司 | Method and device for stabilizing the flame in a burner system of a stationary combustion engine |
| US11313559B2 (en) | 2015-02-27 | 2022-04-26 | Ansaldo Energia Switzerland AG | Method and device for flame stabilization in a burner system of a stationary combustion engine |
| CN104776448A (en) * | 2015-03-11 | 2015-07-15 | 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 |
| CN115574347A (en) * | 2022-09-16 | 2023-01-06 | 南京航空航天大学 | Single-inlet single-standing-vortex concave cavity stabilizer for afterburner |
| 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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| CN102748775B (en) | 2014-11-19 |
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