CN105020051B - A kind of combustor acoustic investigation device - Google Patents
A kind of combustor acoustic investigation device Download PDFInfo
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- CN105020051B CN105020051B CN201510347545.4A CN201510347545A CN105020051B CN 105020051 B CN105020051 B CN 105020051B CN 201510347545 A CN201510347545 A CN 201510347545A CN 105020051 B CN105020051 B CN 105020051B
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- combustor
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Abstract
This application discloses a kind of combustor acoustic investigation device, including propellant pulsation feedway, combustor and chamber length continuous regulating mechanism.Propellant pulsation feedway includes stand, electric pulse device, connecting rod, lower elbow, rigid straight pipe and upper elbow.Chamber length continuous regulating mechanism includes setting water pressure pipeline in a combustion chamber and slip ejector filler, and slip ejector filler includes slip cap, oxygen hose and fuel cavity；Slip cap includes conical nose and hollow guiding slide bar；It is oriented in slide bar and sets the propellant feed pipeline being connected with upper elbow；Lower elbow is connected with liquid propellant source.After using said structure, the propellant realization pulsation supply in combustor can be made, real supply can be simulated and pulsed.In addition, the pulsation supply of propellant, can excite the acoustic oscillations of the various mode in combustor, so as to be used for studying impact of the various acoustic oscillations to engine combustion stability.
Description
Technical field
The application is related to a kind of liquid oscilaltion device, particularly a kind of combustor acoustic investigation device, for investigating vibration
Impact to engine combustion stability.
Background technology
As the more and more fierce enhancing with people's consciousness of competition is explored in space flight, in the urgent need to studying New high-thrust rocket
Electromotor.Rocket engine development is a great system engineering, and many difficulties, wherein unstability can be run in development process
Burning is impassable key subjects.
As the complexity of rough burning typically will consider flameholding sexual factor in the reseach of engine primary stage.
Existing theory cannot also explain the mechanism of production of rough burning completely, need the stability of electromotor is completed by verification experimental verification
Evaluation.
The influence factor of electromotor rough burning is numerous, and vibration is exactly one of them important influence factor.However, mesh
It is front also there is no special assay device, for studying impact of the vibration to engine combustion stability.
The content of the invention
The application technical problem to be solved is, for above-mentioned the deficiencies in the prior art, and to provide a kind of combustor acoustics and grind
Study carefully device, the combustor acoustic investigation device by supplying to propellant pulsation, the acoustic oscillations for exciting burning indoor, so as to
To study impact of the vibration to engine combustion stability.
To solve above-mentioned technical problem, the technical scheme that the application is adopted is：
A kind of combustor acoustic investigation device, including propellant pulsation feedway, combustor and chamber length it is continuous
Adjusting means；
The propellant pulsation feedway includes stand, the electric pulse device being fixed on stand base plate, is vertically arranged
Connecting rod at the top of the electric pulse device, it is fixedly installed on the lower elbow on connecting rod top, is fixedly installed on the rigidity on lower elbow top
Straight tube, the upper elbow for being fixedly installed on rigid straight pipe top；
The chamber length continuous regulating mechanism includes slip ejector filler and can drive slip ejector filler along combustor axle
To mobile slip drive component；It is indoor that the slip ejector filler is arranged at burning, and combustor is divided into combustion zone and non-combustible
Burn area.
The slip ejector filler includes slip cap, oxygen hose, oil scraper ring and fuel cavity.
The slip cap includes that the conical nose that can be slidably matched with Inner Wall of Combustion Chamber sealing and a hollow guiding are slided
Bar.
The conical nose is sealedly and fixedly connected with oxygen hose, forms oxygen chamber；The front end in oxygen chamber is disposed with the gear
Oil ring and fuel cavity；Circular hole and oil scraper ring on the fuel cavity, oxygen hose constitutes the nozzle arrangements for pointing to combustion zone together.
The guiding slide bar is passed from the rear side end cap of combustor and is slidingly sealed with rear side end cap and is connected；The guiding
Slide bar is built-in with propellant feed pipeline.
The lower elbow is connected with liquid propellant source, and upper elbow is connected with the propellant feed pipeline.
The slip drive component is to be arranged at the water pressure pipeline in combustor in non-burning area.
One free end of the lower elbow is connected with propellant source by bottom hose, and a free end of upper elbow leads to
Cross top hose to be connected with the propellant feed pipeline being oriented in slide bar.
The combustor is also associated with chiller, and the chiller includes cooling down inner core, cooling sandwith layer and cooling jacket,
Wherein, cool down inner core to be fixedly connected with the front side end cap of combustor, cooling sandwith layer is engaged with cooling inner core, cooling jacket suit
In the periphery of cooling sandwith layer；Cooling water inlet and coolant outlet are provided with the cooling jacket.
The internal diameter of the rigid straight pipe depends on the speed of propellant flowing, and the speed of propellant flowing is less than 12m/s.
The electric pulse device is variable-frequency pulse device.
The length of the rigid straight pipe depends on the compressibility of the pulse amplitude and propellant of electric pulse device.
The length of the rigid straight pipe is less than the pulse wavelength that electric pulse device sends more than 10 times.
The upper elbow and lower elbow are right-angle elbow pipe.
The electric pulse device, connecting rod and rigid straight pipe are and are coaxially disposed.
The application is had the advantages that using after said structure：
1. the setting of above-mentioned propellant pulsation feedway, can make the propellant realization pulsation supply in combustor, can mould
Intend real supply pulsation.In addition, the pulsation supply of the propellant, can excite the acoustic oscillations of the various mode in combustor,
So as to be used for studying impact of the various acoustic oscillations to engine combustion stability.
2. the setting of above-mentioned chamber length continuous regulating mechanism, can make the length of combustor variable, by it is short elongated or by
Length shortens, and is consecutive variations；Can be used in research due to the length consecutive variations of combustor, caused combustor acoustics
Impact of the consecutive variations of mode to combustion stability, with the consecutive variations of combustor, can simulate in combustor each
Acoustic mode is planted, and is consecutive variations, such as when Actual combustion room length is long by minor face, indoor acoustic mode meeting of burning
Tangentially changed with single order Longitudinal data mode from the tangential acoustic mode of single rank to single order, can then be changed into the acoustics of higher order time
Mode is until single order longitudinal mode；When Actual combustion room length by grow become in short-term, the change contrast of acoustic mode, so energy
The various acoustic oscillations conditions run into by true burning interior are simulated enough, for investigating ejector filler version or even whole
The combustion stability of motivation.By the version or even layout type that change the nozzle on slip ejector filler, so as to obtain steady
Qualitative preferable ejector filler or even engine structure.
Description of the drawings
Fig. 1 shows a kind of structural representation of combustor acoustic investigation device of the application；
Fig. 2 shows the structural representation of propellant pulsation feedway in the application；
Fig. 3 shows the configuration schematic diagram of combustor and chamber length continuous regulating mechanism in the application；
Fig. 4 shows the dimensional structure diagram of combustor and chamber length continuous regulating mechanism in the application；
Fig. 5 shows the vertical section structure schematic diagram of combustor and chamber length continuous regulating mechanism in application；
Fig. 6 shows the perspective side structural representation of slip cap in application；
Fig. 7 shows the three-dimensional left view structural representation of slip cap in the application
Fig. 8 shows the structural representation of stand in the application；
Fig. 9 shows the structural representation of electric pulse device in the application；
Figure 10 shows the structural representation of connecting rod in the application；
Figure 11 shows the structural representation of upper elbow or lower elbow in the application；
Figure 12 shows the structural representation of rigid straight pipe in the application.
Wherein have：1. electric pulse device；2. connecting rod；3. elbow is descended；4. bottom hose；5. rigid straight pipe；6. elbow is gone up；7. go up
Flexible pipe；8. stand；9. connecting rod interface；10. straight tube slip circular hole；11. screwed holes；12. combustor；13. slip ejector fillers；14.
Slip cap；141. conical nose；142. are oriented to slide bar；143. propellant entrances；144. oxygen entrances；15. oxygen hoses；16. gear oil
Ring；17. fuel cavities；18. sliding rings；19. hydraulic pressure water inlets；20. hydraulic pressure water outs；21. cooling inner cores；22. cooling folders
Layer；23. cooling jackets；231. cooling water inlet；232. coolant outlet；24. bolts；25. propellants pulsation feedway.
Specific embodiment
The application is described in further detail with concrete better embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of combustor acoustic investigation device, including propellant pulsation feedway 25,12 and of combustor
Chamber length continuous regulating mechanism.
As shown in Fig. 2 above-mentioned propellant pulsation feedway 25 include electric pulse device 1, connecting rod 2, lower elbow 3,
Bottom hose 4, rigid straight pipe 5, upper elbow 6, top hose 7 and stand 8.
The structure of above-mentioned stand 8 is as shown in figure 8, including stand base plate, stand top board and be arranged at centre between the two
Gripper shoe.The center for being provided centrally with several screwed holes 11, stand top board and intermediate support plate of stand base plate is provided with
One straight-bar slip circular hole 10.Stand 8 requires rigidity and has good stability that its eigentone must be considerably larger than will be realized
Propellant impulse hunting frequency, reduce impact to oscillation of flows to be triggered.
The structure of above-mentioned electric pulse device 1 is as shown in figure 9, be fixed on stand base plate by electric pulse device 1 by screw
In screwed hole 11, electric pulse device 1 is preferably variable-frequency pulse device.
The structure of above-mentioned connecting rod 2 as shown in Figure 10, is vertically installed in the top of electric pulse device 1.Connecting rod 2 need to select lightweight
The good material of rigidity, so that its quality is negligible.
The structure of above-mentioned upper elbow 6 and lower elbow 3 is as shown in figure 11, it is preferably to for right-angle elbow pipe, be respectively provided with two freedom
End, respectively vertical free end and horizontal free end.Wherein, a connecting rod interface 9 is provided with the bottom corners of lower elbow 3,
The connecting rod interface 9 is engaged with the top of connecting rod 2, makes lower elbow 3 be fixedly connected on the top of connecting rod 2.
The vertical free end of lower elbow 3 can be passed from the straight-bar slip circular hole 10 of intermediate support plate, and with rigid straight pipe 5
Bottom be fixedly connected；The horizontal free end of lower elbow 3 is fixedly connected with bottom hose 4.
The vertical free end of upper elbow 6 can be passed from the straight-bar slip circular hole 10 of stand top board, and with rigid straight pipe 5
Top is fixedly connected；The horizontal free end of upper elbow 6 is preferably fixedly connected with top hose 7.
As shown in figure 12, rigid straight pipe 5 is vertically arranged the structure of rigid straight pipe 5, and electric pulse device 1, connecting rod 2 and rigidity are straight
Pipe 5 is and is coaxially disposed.Rigid straight pipe 5 requires rigidity, and itself is as light as possible greatly as far as possible, namely specific stiffness is high, reduces vibration
Inertia effects.
There is flowable liquid in top hose 7, upper elbow 6, rigid straight pipe 5, lower elbow 3 and bottom hose 4, i.e. this Shen
Please in propellant.The internal diameter of rigid straight pipe 5 depends on the speed of aforesaid liquid flowing, and the rate request of liquid flowing is less than
12m/s.The length of rigid straight pipe 5 depends on the compressibility of the pulse amplitude and liquid of electric pulse device 1.Rigid straight pipe 5
Length is preferably little than the pulse wavelength that electric pulse device 1 sends more than 10 times.At this moment, it can be seen that liquid inside rigid straight pipe 5
Body, i.e. propellant are a rigid body.
Above-mentioned chamber length continuous regulating mechanism includes slip ejector filler 13 and can drive slip ejector filler 13 along burning
The slip drive component of the axial movement of room 12.
As shown in Fig. 3, Fig. 4 and Fig. 5, above-mentioned slip ejector filler 13 is arranged in combustor 12, and by combustor 12 points be
Combustion zone and non-burning area.
Above-mentioned slip ejector filler 13 includes slip cap 14, oxygen hose 15, fuel cavity 17 and is arranged on oxygen hose 15 and combustion
The material oil scraper ring 16 between the two of chamber 17.
As shown in Figure 6 and Figure 7, above-mentioned slip cap 14 include one be arranged on it is in combustor 12 and close with 12 inwall of combustor
Conical nose 141 and a hollow guiding slide bar 142 that envelope is slidably matched.
As shown in figure 3, a sliding ring 18 is provided between 12 inwall of conical nose 141 and combustor, so as to
Ensure being slidingly sealed between the two.
Above-mentioned oxygen hose 15 and fuel cavity 17 are mutually fixed with conical nose 141 successively.
Above-mentioned conical nose 141 is sealedly and fixedly connected with oxygen hose 15, forms oxygen chamber；The front end in oxygen chamber is disposed with
State oil scraper ring 16 and fuel cavity 17.
Circular hole and oil scraper ring 16 on above-mentioned fuel cavity 17, oxygen hose 15 constitutes the nozzle arrangements for pointing to combustion zone together.
The type and distribution mode of the nozzle arrangements can be changed, or single injector as needed.
Above-mentioned guiding slide bar 142 on slip ejector filler 13 pass from the rear side end cap of combustor 12 and with rear side end cap
It is slidingly sealed connection.It is preferred that, it is oriented between 12 rear side end cap of slide bar 142 and combustor and is also equipped with a sliding ring 18,
So as to can guarantee that being slidingly sealed between the two.
Propellant feed pipeline and oxygen entrance 144 are provided with the cavity of above-mentioned guiding slide bar 142, the oxygen entrance 144 with
Oxygen hose 15 is connected.The entrance of propellant feed pipeline, also as propellant entrance 143.
As shown in figure 3, above-mentioned slip drive component is preferably arranged on the hydraulic pressure solenoid in combustor 12 in non-burning area
Road, but it is also possible to for other drive components, such as cylinder etc..
Water pressure pipeline includes the water pressure entrance 19 being arranged on 12 rear side end lid of combustor and water pressure outlet 20.Water
Pressure piping also can play a part of cooling to combustor 12.
When slip drive component adopts water pressure pipeline, the principle of chamber length continuous regulating mechanism length adjustment is such as
Under：
The axial movement of above-mentioned slip ejector filler 13, mainly due to 13 both sides of slip ejector filler, namely combustion zone and non-
What the pressure difference of combustion zone was caused, the effect of water pressure pipeline mesohigh water is exactly punching press and decompressing effect.When to non-burning area
When being inside filled with water under high pressure, the increase of non-burning area pressure, and combustion zone pressure is constant, causes non-burning area pressure to press more than combustion zone
Power, so as to promote slip ejector filler 13 to combustion zone direction（Namely the left side shown in Fig. 5）Move, make the reality of combustor 12
Border contraction in length.Conversely, when sluicing from non-burning area, process contrast so that slip ejector filler 13 is to away from combustion zone
Direction move, make the length of Actual combustion room 12.
One free end of above-mentioned lower elbow 3 is preferably connected with liquid propellant source by bottom hose 4, upper elbow
6 free end is preferably connected with the propellant entrance 143 being oriented in slide bar 142 by top hose 7.
Above-mentioned bottom hose 4, lower elbow 3, rigid straight pipe 5, upper elbow 6, top hose 7 and the propellant being oriented in slide bar 142
Feeding pipe, collectively constitutes whole propellant feed pipeline.
The flexible needs of above-mentioned bottom hose 4 and top hose 7 are good enough, so that can ignore which vibrates the arteries and veins to being triggered
The impact of dynamic stream.
Above-mentioned combustor 12 is also associated with chiller, and the chiller includes cooling down inner core 21, cooling sandwith layer 22 and cold
But overcoat 23.
Wherein, cool down inner core 21 to be fixedly connected with the front side end cap of combustor 12, be preferably fixedly connected by bolt 24.
Cooling sandwith layer 22 is engaged with cooling inner core 21, and cooling jacket 23 is set in the periphery of cooling sandwith layer 22；Cooling is outer
Cooling water inlet 231 and coolant outlet 232 are provided with set 23.
Propellant pulsation feedway operation principle be：Electric pulse device 1 starts, and drives above-mentioned whole propellant feed
Pipeline vibration, and the propellant in whole propellant feed pipeline is due to the inertia of itself, so that its flow produces vibration, it is real
The pulsation supply of propellant in existing the application.
The preferred implementation of the application described in detail above, but, the application is not limited in above-mentioned embodiment
Detail, in the range of the technology design of the application, various equivalents can be carried out to the technical scheme of the application, this
A little equivalents belong to the protection domain of the application.
Claims (10)
1. a kind of combustor acoustic investigation device, it is characterised in that：Including propellant pulsation feedway, combustor and combustor
Length continuous regulating mechanism；
The propellant pulsation feedway includes stand, the electric pulse device being fixed on stand base plate, is vertically installed in electricity
Connecting rod at the top of moving pulse device, the lower elbow for being fixedly installed on connecting rod top, the rigid straight pipe for being fixedly installed on lower elbow top,
It is fixedly installed on the upper elbow on rigid straight pipe top；
The chamber length continuous regulating mechanism includes slip ejector filler and slip ejector filler can be driven to move axially of the firing chamber
Dynamic slip drive component；The slip ejector filler is arranged at burning interior, and combustor is divided into combustion zone and non-burning area；
The slip ejector filler includes slip cap, oxygen hose, oil scraper ring and fuel cavity；
The slip cap includes the conical nose that can be slidably matched with Inner Wall of Combustion Chamber sealing and a hollow guiding slide bar；
The conical nose is sealedly and fixedly connected with oxygen hose, forms oxygen chamber；The front end in oxygen chamber is disposed with the oil scraper ring
And fuel cavity；Circular hole and oil scraper ring on the fuel cavity, oxygen hose constitutes the nozzle arrangements for pointing to combustion zone together；
The guiding slide bar is passed from the rear side end cap of combustor and is slidingly sealed with rear side end cap and is connected；The guiding slide bar
It is built-in with propellant feed pipeline；
The lower elbow is connected with liquid propellant source, and upper elbow is connected with the propellant feed pipeline.
2. combustor acoustic investigation device according to claim 1, it is characterised in that：The slip drive component is setting
Water pressure pipeline in non-burning area in combustor.
3. combustor acoustic investigation device according to claim 1, it is characterised in that：One free end of the lower elbow
It is connected with propellant source by bottom hose, a free end of upper elbow is by top hose and the propulsion being oriented in slide bar
Agent feeding pipe is connected.
4. combustor acoustic investigation device according to claim 1, it is characterised in that：The combustor is also associated with cooling
Device, the chiller include cooling down inner core, cooling sandwith layer and cooling jacket, wherein, cool down the front side end of inner core and combustor
Lid is fixedly connected, and cooling sandwith layer is engaged with cooling inner core, and cooling jacket is set in the periphery of cooling sandwith layer；The cooling jacket
On be provided with cooling water inlet and coolant outlet.
5. combustor acoustic investigation device according to claim 1, it is characterised in that：The internal diameter of the rigid straight pipe depends on
In the speed of propellant flowing, the speed of propellant flowing is less than 12m/s.
6. combustor acoustic investigation device according to claim 1, it is characterised in that：The electric pulse device is frequency conversion arteries and veins
Rush device.
7. combustor acoustic investigation device according to claim 1 or 5, it is characterised in that：The length of the rigid straight pipe
Depending on the compressibility of the pulse amplitude and propellant of electric pulse device.
8. combustor acoustic investigation device according to claim 7, it is characterised in that：The length of the rigid straight pipe is than electricity
The pulse wavelength that moving pulse device sends is little more than 10 times.
9. combustor acoustic investigation device according to claim 1, it is characterised in that：The upper elbow and lower elbow are
Right-angle elbow pipe.
10. combustor acoustic investigation device according to claim 1, it is characterised in that：The electric pulse device, connecting rod and
Rigid straight pipe is and is coaxially disposed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510347545.4A CN105020051B (en) | 2015-06-19 | 2015-06-19 | A kind of combustor acoustic investigation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510347545.4A CN105020051B (en) | 2015-06-19 | 2015-06-19 | A kind of combustor acoustic investigation device |
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| CN105020051A CN105020051A (en) | 2015-11-04 |
| CN105020051B true CN105020051B (en) | 2017-04-05 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673253B (en) * | 2016-01-14 | 2017-06-20 | 北京理工大学 | A kind of burner for studying metallic particles hugging characteristic |
| CN106709144B (en) * | 2016-11-22 | 2019-12-13 | 中国人民解放军装备学院 | Engine instability prediction and evaluation method based on autocorrelation theory |
| KR101942001B1 (en) * | 2017-08-11 | 2019-01-25 | 충남대학교산학협력단 | Frequency variable type burner |
| CN109252982B (en) * | 2018-11-19 | 2020-07-31 | 北京理工大学 | Test method for nonlinear unstable combustion of solid rocket engine under overload condition |
| CN109990279B (en) * | 2019-03-14 | 2020-04-24 | 北京航空航天大学 | Pulsating blunt body streaming combustion device based on acoustic excitation |
| CN112324588B (en) * | 2020-09-30 | 2021-11-09 | 中国人民解放军战略支援部队航天工程大学 | Injector capable of stably suspending fuel liquid drops in high-pressure environment |
| CN113075353B (en) * | 2021-04-01 | 2022-03-29 | 上海交通大学 | Solid propellant combustion testing device |
| CN113969849B (en) * | 2021-09-26 | 2023-07-11 | 中国人民解放军战略支援部队航天工程大学 | Single-nozzle rocket engine with modularized design |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| UA15477U (en) * | 2005-10-03 | 2006-07-17 | Volodymyr Olehovych Fedosenko | Jet engine with increased level of jet thrust and decreased level of acoustic noises |
| RU2390648C1 (en) * | 2008-12-17 | 2010-05-27 | Государственное образовательное учреждение высшего профессионального образования "Воронежский государственный технический университет" | Fluid propellant rocket engine |
| CN101907042B (en) * | 2009-06-05 | 2013-11-06 | 西北工业大学 | Aspirated engine combustion chamber for eliminating combustion oscillation in suction type |
| CN101907043B (en) * | 2010-07-08 | 2013-06-05 | 中国航天科技集团公司第六研究院第十一研究所 | High-frequency combustion instability coverall process simulation test automatic regulating system and method |
| CN103487254B (en) * | 2013-07-29 | 2015-09-30 | 中国人民解放军装备学院 | A kind of test unit with controllable frequency pressure oscillation mechanism |
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