CN102607061A - Geometrical variable flame stabilizing device - Google Patents
Geometrical variable flame stabilizing device Download PDFInfo
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- CN102607061A CN102607061A CN2012100824093A CN201210082409A CN102607061A CN 102607061 A CN102607061 A CN 102607061A CN 2012100824093 A CN2012100824093 A CN 2012100824093A CN 201210082409 A CN201210082409 A CN 201210082409A CN 102607061 A CN102607061 A CN 102607061A
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Abstract
The invention discloses a geometrical variable flame stabilizing device and belongs to the technical field of afterburner flame stabilization of aircraft engines. The geometrical variable flame stabilizing device disclosed by the invention utilizes a V-shape as a basic bluff body structure and consists of a main body part and a transmission power part, wherein the main body part is vertically installed in an afterburner cartridge receiver, the afterburner cartridge receiver comprises a front streamline head part, a blade A with a rotating shaft A, a blade B with a rotating shaft B, a rotating shaft supporting plate and a mounting seat, and the two ends of the streamline head part are fixedly connected between the mounting seat and the rotating shaft supporting plate. The geometrical shape of the flame stabilizing device provided by the invention can be changed to effectively reduce the flow resistance of the flame stabilizing device if necessary, or the flow resistance is increased within a short time to improve the ignition success rate, or the geometrical shape of the flame stabilizing device is adjusted to consistently keep the flame stabilizing device at the optimal combination point of the flame stabilization and flow resistance loss so as to obtain the maximal thrust performance of the afterburner.
Description
Technical field
The invention belongs to aeroengine thrust augmentation flame combustion chamber stabilization technique field, is a kind of flame stabilizer of geometry variable specifically.
Background technology
The after-burner technology becomes the important means that engine increases thrust-weight ratio with its characteristics that increase turbojet thrust in a short time, and the engine that has after-burner is applied on the various military aircrafts widely, to improve its mobility.The gaseous-pressure of behind turbine, discharging in the after-burner reduces greatly, speed improves, and it is extremely unstable to flow, and needs flame stabilizer to carry out the tissue of the stable and burning of flame.Traditional after-burner almost all adopts the flameholder of bluff body structure; In high velocity air, forming the recirculating zone makes part fire high-temperature combustion product generation backflow motion (promptly in the opposite direction with incoming flow) as the constant ignition source with automatic compensation ability; Constantly lighting the fresh not flammable mixture of combustion, thereby reach the purpose of the retention flame.The development of modern aeroengine technology is had higher requirement to the design of flameholder; The operating mode scope of flameholder is broader than in the past; For the bluff body flameholder that after-burner adopted, making it in whole working range, keep optimum igniting, steady flame, combustibility and minimum flow resistance loss is a very big design challenge.
On the other hand, when having only aircraft to need the motor-driven and supersonic flight of high thrust, the after-burner of the turbojet that is loaded just gets into duty.When after-burner is worked; Flow losses that its flame stabilizer brings depend on be the retention flame the cost that must pay; But when after-burner is not worked; The flow resistance loss that its flame stabilizer brought is useless fully, can only bring reducing of thrust, and desirable flame stabilizer should be reduced to minimum with flow resistance when not working.Therefore, the flow resistance that is reduced in after-burner flame stabilizer under " non-reinforcing " state is a research direction of flameholder design.
In various bluff body flameholders, modal is the V-flame stabilizer, and the cross section of V-flame stabilizer is V-shaped, and its structure is as shown in Figure 1 with steady flame principle schematic.When the mixed gas 2 of combustion gas is at a high speed flowed through V-arrangement bluff body 1, because the effect of gas viscosity power with the carried away by air movement in the hidden zone of bluff body 1 back, forms the local depression district.Thereby make bluff body 1 downstream part part air-flow under action of pressure, flow to the fallback area behind the bluff body 1 with the flow direction opposite, with the continuity that keeps flowing with primary air.Like this, produced recirculating zone 3 at bluff body 1 rear.Recirculating zone 3 is basic assurances of the bluff body stabilizer retention flame 4, and recirculating zone 3 length are big more generally speaking, and its steady flame effect is good more.And when blockage ratio one timing, recirculating zone 3 length L and stabilizer trailing edge width D are approximated to proportional relation, and the increase of trailing edge width D can make front face area increase, and flow resistance increases.Because structure is very simple, easy for installation, so the V-flame stabilizer has obtained using widely in after-burner and punching engine.
For the ignition performance that satisfies after-burner high-altitude ignition performance particularly, this V-flame stabilizer needs higher mobile obstruction ratio, and this causes higher flow resistance loss.Simultaneously, because the V-flame stabilizer is installed in inside, combustion chamber with fixing geometry, when after-burner is not worked, can bring bigger useless flow losses.
Double V-shaped flameholder is the improvement project of V-flame stabilizer; As shown in Figure 2; Its height and width are all basic identical with conventional v-stabilizer, and difference is: except main stabilizer 6, a little stabilizer 5 is arranged at the leading edge place; Through the intussusception of big or small stabilizer, formed twice air inlet slit at head.Recirculating zone structure behind two V and the conventional V-flame stabilizer is as shown in Figure 3; Compare with conventional V-flame stabilizer; Variation has taken place the air flow structure of double V-shaped flameholder: it is made up of two strands of air-flows; One is a main flow 7 of walking around main stabilizer 6, and one is to walk around little stabilizer 5, flow into the inner pre-burning stream 8 of main stabilizer 6.Air flow structure changes makes the recirculating zone behind the flameholder that variation also take place.Double V-shaped flameholder is introduced main stabilizer 6 inside to a small amount of pre-burning stream 8, forms a little recirculating zone, and the big recirculating zone behind the conventional V-flame stabilizer still exists.Two combine into one in the recirculating zone for size when the width that cracks is 2.8mm, becomes a narrow and long big recirculating zone 9, extends to the stabilizer downstream from stabilizer inside.Center of vorticity is in main stabilizer 6, and the point of safes burning things which may cause a fire disaster is in main stabilizer 6 near little stabilizer 5 trailing edges, and flame 10 relies in the stabilizers the high-temperature product of pre-burning to get into the recirculating zone and keeps.The design of this stabilizer is adopted by certain type turbojet engine after-burner, and performance on probation shows that this stabilizer has that ignition performance is good, flow losses are little, the efficiency of combustion advantages of higher.
Double V-shaped flameholder is under certain incoming flow parameter; To form best flow field be the gap width that big or small recirculating zone is combined into a recirculating zone to there being one; But the working condition of engine changes, so can not guarantee that the flow field behind the stabilizer is best always.Equally, the geometry of double V-shaped flameholder is fixed, and when after-burner is not worked, can bring bigger useless flow losses.
Summary of the invention
The objective of the invention is under the different operating state, to keep the steady flame performance of burning of optimum and the problem of flow resistance loss, propose a kind of flame stabilizer of geometry variable for the flame stabilizer that solves fixed geometirc structure in the existing after-burner flame stabilization technology.
The bluff body flame stabilizer of fixed geometirc structure can not keep the steady flame performance of optimum and the problem of flow resistance loss in the existing after-burner flame stabilization technology under the different operating state; The present invention proposes a kind of flame stabilizer of geometry variable, solves above-mentioned technical problem through the geometry that changes stabilising arrangement.
The flame stabilizer of geometry variable provided by the invention is basic bluff body structure with V-type; Partly form by main part and transfer motion power; Main part vertically is installed in the after-burner casing (18); Described main part comprises the blade A (12) of the streamlined head in the place ahead (11), band rotating shaft A (16), blade B (13), rotating shaft gripper shoe (14) and the mount pad (15) of band rotating shaft B (17), and the two ends of streamlined head (11) are fixedly connected between mount pad (15) and the rotating shaft gripper shoe (14); The installing hole on mount pad (15) and the rotating shaft gripper shoe (14) is passed at the two ends of described rotating shaft A (16) and rotating shaft B (17) respectively; Described mount pad (15) is fixedly connected with after-burner casing (18).Mount pad (15) one end countershaft A (16) and rotating shaft B (17) carry out the rotating shaft axial limiting, and rotating shaft gripper shoe (14) end keeps rotating shaft axially free.
The present invention is owing to take above technical scheme, and it has the following advantages:
(1) when after-burner is not worked, can reduce its flow resistance effectively through the change of flame stabilizer geometry.
(2) when after-burner carries out high-altitude ignition, can increase flow resistance with short-term through the change of flame stabilizer geometry is that cost improves ignition success rate.
(3) when after-burner is operated in big operating mode scope, geometry that can be through the real-time regulated flameholder is so that it remains at the best joint of flame stabilization and flow resistance loss, to obtain the maximum thrust performance of after-burner.
(4) this geometry variable flame stabilizer is simple in structure, assembly is few, and realizability is strong, reliability is high.
Description of drawings
Fig. 1 is V-flame stabilizer structure of the prior art and steady flame principle schematic;
Fig. 2 is a double V-shaped flameholder structural representation in the prior art;
Fig. 3 is the steady flame principle comparison diagram of double V-shaped flameholder and V-flame stabilizer;
Fig. 4 is the structural representation of geometry variable flameholder provided by the invention;
Fig. 5 is a geometry variable flameholder operation principle sketch map provided by the invention;
Fig. 6 is the installation side view of geometry variable flameholder provided by the invention;
Fig. 7 a and 7b are the moving vane open and close view of geometry variable flameholder provided by the invention;
Fig. 8 is the motion sketch map of the actuating unit among the present invention, the vertical view after the unilateral expansion of mechanical outside wall surface;
Fig. 9 is the installation diagram of flame stabilizer testpieces on the rectangle testing stand of geometry variable of the present invention;
Figure 10 is the variation relation curve of flow resistance coefficient ψ with stabilizer trailing edge groove width D.
Among the figure:
1. bluff body; 2. combustion gas mixes gas; 3. recirculating zone; 4. the retention flame; 5. main stabilizer; 6. little stabilizer; 7. main flow; 8. pre-burning flows; 9. big recirculating zone; 10. flame; 11. head; 12. blade A; 13. blade B; 14. rotating shaft gripper shoe; 15. mount pad; 16. rotating shaft A; 17. rotating shaft B; 18. casing; 19. combustion gas incoming flow; 20. connection rod set; 21. power connecting ring; 22. hydraulic actuator; 23. turbine rear center awl; 24. rectangle testing stand.
The specific embodiment
To combine accompanying drawing and embodiment that the present invention is done further detailed description below.
Geometry variable flame stabilizer provided by the invention like Fig. 4, shown in Figure 5, is specially:
Geometry variable flame stabilizer provided by the invention is basic bluff body structure with V-type, partly is made up of stabilizer body part and transfer motion power.The stabilizer body part is as shown in Figure 4; Comprise the rear moving vane A12 of the streamlined head in the place ahead 11, band rotating shaft 16A, rear moving vane B13, rotating shaft gripper shoe 14 and the mount pad 15 of band rotating shaft 17B, the two ends of streamlined head 11 are fixedly connected between mount pad 15 and the rotating shaft gripper shoe 14.The installing hole on mount pad 15 and the rotating shaft gripper shoe 14 is passed at the two ends of described rotating shaft A16 and rotating shaft B17 respectively; Only carry out the rotating shaft axial limiting at mount pad 15 1 end countershaft A16 and rotating shaft B17; Rotating shaft gripper shoe 14 ends keep rotating shaft axially free, the stuck phenomenon that can avoid rotating shaft to cause owing to thermal expansion during variations in temperature on a large scale like this.The steady flame partial cross section of stabilizer body is as shown in Figure 5; As blade A12 and blade B13 when A16 and rotating shaft B17 rotate with direction shown in Fig. 5 (a) around the shaft respectively; The trailing edge width D reduces, and reflux area length reduces, and steady flame performance reduces; But the front face area of stabilising arrangement reduces, and the flow resistance in air-flow reduces.When the trailing edge of blade A12 and blade B13 was in contact with one another, the stabilizer cross section became accurate streamlined geometry, and shown in Fig. 5 (b), this moment, stabilizer had minimum flow resistance.As blade A12 and blade B13 when A16 and rotating shaft B17 rotate with direction shown in Fig. 5 (b) around the shaft respectively; The trailing edge width D increases; Reflux area length increases, and steady flame performance strengthens, but owing to front face area increases; Then the flow resistance in air-flow increases, and the maximum of trailing edge width D is by engine augmentor actual size and concrete operating mode decision.The Breadth Maximum H of the streamlined head 11 in the place ahead is more little good more by the distance decision of two rotating shafts in theory, in actual design, restrict apart from the installation that receives rotating shaft diameter and transmission mechanism between rotating shaft, but Breadth Maximum H should be not more than 25mm.The width W of blade A12 and blade B13 is determined by actual demand, generally should between 20mm to 40mm, select.Fig. 6 and Fig. 7 are the scheme of installation of this stabilising arrangement in after-burner, and Fig. 8 is an actuating unit motion sketch map, are the vertical views behind the casing 18 outside wall surface planar developments.Below in conjunction with these 3 accompanying drawings, stabilizer body mounting means and actuating unit partly described.The flame stabilizer main part vertically is installed in the after-burner casing 18, and is as shown in Figure 6, and mount pad 15 is fixedly connected with after-burner casing 18, and stabilising arrangement rotating shaft A16, B17 are vertical with casing 18, and streamlined head 11 is over against combustion gas incoming flow 19 directions.Will be in the practical application along several flame stabilizers of the present invention of after-burner casing 18 circumference uniform distributions, quantity is confirmed by actual demand, is seen Fig. 7.The transfer motion power of this flame stabilizer partly is arranged on outside the casing 18; Form by connection rod set 20, power connecting ring 21 and hydraulic actuator 22; Hydraulic actuator 22 drives power connecting ring 21 and does translational motion, and rotational motion drives stabilising arrangement moving vane rotating shaft A16, B17 carries out corresponding rotation action and changes stabilising arrangement trailing edge width D thereby connection rod set 20 converts translation to.Fig. 7 (a) is a stabilising arrangement blade open mode, and Fig. 7 (b) is a stabilising arrangement blade closure state, and wherein 23 is engine turbine rear center awls.
Preferably, each transfer motion power partly is used to control the blade rotation of two stable main parts that are adjacent.
Above-mentioned flame stabilizer testpieces has been carried out the simulated test research of single cold conditions flow resistance at the rectangle testing stand; The installation of stabilizer is as shown in Figure 9; The cross section of rectangle testing stand 24 wherein is 170mm (x) * 150mm (y); H=24mm, W=30mm are chosen in the design of flame stabilizer testpieces, and the excursion of D is 13mm～48mm.Test is carried out at normal temperatures and pressures, the incoming flow Mach 2 ship of choosing 0.1,0.19 and 0.28, and result of the test is shown in figure 10.Ordinate ψ is a flow resistance coefficient among the figure, and the flow resistance brought of the bright stabilizer of novel is more little more for flow resistance coefficient; Abscissa D is the stabilizer groove width.From result of the test, can obtain to draw a conclusion: flow resistance coefficient along with reducing of trailing edge groove width, and when the trailing edge groove width is reduced to 13mm from 48mm, flow resistance coefficient is reduced to 0.37 from 0.85, and the flow resistance characteristic has obtained improving significantly.
Claims (4)
1. the flame stabilizer of a geometry variable; It is characterized in that: described flame stabilizer is basic bluff body structure with V-type; Partly form by main part and transfer motion power; Main part vertically is installed in the after-burner casing (18); Described main part comprises the blade A (12) of the streamlined head in the place ahead (11), band rotating shaft A (16), blade B (13), rotating shaft gripper shoe (14) and the mount pad (15) of band rotating shaft B (17), and the two ends of streamlined head (11) are fixedly connected between mount pad (15) and the rotating shaft gripper shoe (14); The installing hole on mount pad (15) and the rotating shaft gripper shoe (14) is passed at the two ends of described rotating shaft A (16) and rotating shaft B (17) respectively; Described mount pad (15) is fixedly connected with after-burner casing (18).
2. the flame stabilizer of a kind of geometry variable according to claim 1, it is characterized in that: mount pad (15) one end countershaft A (16) and rotating shaft B (17) carry out the rotating shaft axial limiting, and rotating shaft gripper shoe (14) end keeps rotating shaft axially free.
3. the flame stabilizer of a kind of geometry variable according to claim 1 is characterized in that: rotating shaft A (16), B (17) are vertical with casing (18), and streamlined head (11) is over against combustion gas incoming flow (19) direction.
4. the flame stabilizer of a kind of geometry variable according to claim 1; It is characterized in that: transfer motion power partly is arranged on outside the casing (18); Form by connection rod set (20), power connecting ring (21) and hydraulic actuator (22); Hydraulic actuator (22) drives power connecting ring (21) and does translational motion, and connection rod set (20) converts translation to rotational motion drive rotating shaft A (16), B (17) thereby carrying out corresponding rotation action changes stabilising arrangement trailing edge width D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210082409.3A CN102607061B (en) | 2012-03-26 | 2012-03-26 | The flame stabilizer that a kind of geometry is variable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210082409.3A CN102607061B (en) | 2012-03-26 | 2012-03-26 | The flame stabilizer that a kind of geometry is variable |
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| CN102607061A true CN102607061A (en) | 2012-07-25 |
| CN102607061B CN102607061B (en) | 2016-03-02 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359125A (en) * | 2014-10-30 | 2015-02-18 | 南京航空航天大学 | Central igniting mechanism of combustor of scramjet engine |
| CN104776448A (en) * | 2015-03-11 | 2015-07-15 | 北京航空航天大学 | Multifunctional mode adjustable flame stabilizing supporting plate |
| CN106610029A (en) * | 2016-11-18 | 2017-05-03 | 西北工业大学 | An integrated afterburner with supporting plate jet flow structures |
| CN109915856A (en) * | 2019-03-01 | 2019-06-21 | 西北工业大学 | A kind of after-burner rectification supporting plate structure |
| CN112610983A (en) * | 2020-12-07 | 2021-04-06 | 河北汉光重工有限责任公司 | Ignition and combustion stabilizing device of water-jet engine |
| CN113551262A (en) * | 2021-07-19 | 2021-10-26 | 南昌航空大学 | Take extension board flame holder of crescent sand dune profile |
| CN113551261A (en) * | 2021-07-19 | 2021-10-26 | 南昌航空大学 | Wave V type flame stabilizer |
| CN113701191A (en) * | 2021-09-01 | 2021-11-26 | 南昌航空大学 | Staggered flow guide middle seam type V-shaped flame stabilizer |
| CN113701192A (en) * | 2021-09-01 | 2021-11-26 | 南昌航空大学 | Wave-shaped double-V-shaped flame stabilizer with sawteeth |
| CN113776083A (en) * | 2021-10-08 | 2021-12-10 | 中山大学 | Deformable flame stabilizer |
| CN114151826A (en) * | 2021-10-20 | 2022-03-08 | 中国航发四川燃气涡轮研究院 | Variable geometry combustion chamber |
| CN115127118A (en) * | 2022-06-17 | 2022-09-30 | 江苏科技大学 | V-shaped flame stabilizer with guide plate |
| CN115435336A (en) * | 2022-09-01 | 2022-12-06 | 中国航发贵阳发动机设计研究所 | Flame stabilizer structure with adjustable blocking ratio |
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| CN101776283A (en) * | 2009-01-13 | 2010-07-14 | 北京航空航天大学 | Flame stabilizer with jet injection |
| CN102200292A (en) * | 2010-03-26 | 2011-09-28 | 北京航空航天大学 | Flame stabilizing device and method for supporting plate with cavities |
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| US5768886A (en) * | 1995-09-29 | 1998-06-23 | National Science Council | Twin-plate flameholder construction |
| JP2006242399A (en) * | 2005-02-28 | 2006-09-14 | Mitsubishi Heavy Ind Ltd | Combustion equipment and combustion method by combustion equipment |
| CN101334174A (en) * | 2008-06-19 | 2008-12-31 | 北京航空航天大学 | V -type cone flame holder for rotor engine |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359125A (en) * | 2014-10-30 | 2015-02-18 | 南京航空航天大学 | Central igniting mechanism of combustor of scramjet engine |
| CN104776448A (en) * | 2015-03-11 | 2015-07-15 | 北京航空航天大学 | Multifunctional mode adjustable flame stabilizing supporting plate |
| CN106610029A (en) * | 2016-11-18 | 2017-05-03 | 西北工业大学 | An integrated afterburner with supporting plate jet flow structures |
| CN106610029B (en) * | 2016-11-18 | 2019-03-26 | 西北工业大学 | A kind of integrated after-burner of supporting plate jet stream |
| CN109915856A (en) * | 2019-03-01 | 2019-06-21 | 西北工业大学 | A kind of after-burner rectification supporting plate structure |
| CN109915856B (en) * | 2019-03-01 | 2020-06-16 | 西北工业大学 | Afterburning chamber rectification extension board structure |
| CN112610983B (en) * | 2020-12-07 | 2022-03-25 | 河北汉光重工有限责任公司 | Ignition and combustion stabilizing device of water-jet engine |
| CN112610983A (en) * | 2020-12-07 | 2021-04-06 | 河北汉光重工有限责任公司 | Ignition and combustion stabilizing device of water-jet engine |
| CN113551261B (en) * | 2021-07-19 | 2022-06-14 | 南昌航空大学 | Wave V type flame stabilizer |
| CN113551261A (en) * | 2021-07-19 | 2021-10-26 | 南昌航空大学 | Wave V type flame stabilizer |
| CN113551262B (en) * | 2021-07-19 | 2022-06-14 | 南昌航空大学 | Take extension board flame holder of crescent sand dune profile |
| CN113551262A (en) * | 2021-07-19 | 2021-10-26 | 南昌航空大学 | Take extension board flame holder of crescent sand dune profile |
| CN113701191A (en) * | 2021-09-01 | 2021-11-26 | 南昌航空大学 | Staggered flow guide middle seam type V-shaped flame stabilizer |
| CN113701192A (en) * | 2021-09-01 | 2021-11-26 | 南昌航空大学 | Wave-shaped double-V-shaped flame stabilizer with sawteeth |
| CN113701191B (en) * | 2021-09-01 | 2022-06-24 | 南昌航空大学 | Staggered flow guide middle seam type V-shaped flame stabilizer |
| CN113776083A (en) * | 2021-10-08 | 2021-12-10 | 中山大学 | Deformable flame stabilizer |
| CN114151826A (en) * | 2021-10-20 | 2022-03-08 | 中国航发四川燃气涡轮研究院 | Variable geometry combustion chamber |
| CN115127118A (en) * | 2022-06-17 | 2022-09-30 | 江苏科技大学 | V-shaped flame stabilizer with guide plate |
| CN115127118B (en) * | 2022-06-17 | 2023-12-22 | 江苏科技大学 | V-shaped flame stabilizer with guide plate |
| CN115435336A (en) * | 2022-09-01 | 2022-12-06 | 中国航发贵阳发动机设计研究所 | Flame stabilizer structure with adjustable blocking ratio |
| CN115435336B (en) * | 2022-09-01 | 2024-04-09 | 中国航发贵阳发动机设计研究所 | Flame stabilizer structure with adjustable blocking ratio |
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