CN101576025B - Multi-mode spraying pipe with adjustable throat for ramjet engine - Google Patents
Multi-mode spraying pipe with adjustable throat for ramjet engine Download PDFInfo
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- CN101576025B CN101576025B CN2009100863895A CN200910086389A CN101576025B CN 101576025 B CN101576025 B CN 101576025B CN 2009100863895 A CN2009100863895 A CN 2009100863895A CN 200910086389 A CN200910086389 A CN 200910086389A CN 101576025 B CN101576025 B CN 101576025B
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- adjustment sheet
- holding part
- adjustable throat
- spraying pipe
- ramjet engine
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Abstract
The invention provides a solution for a multi-mode spraying pipe with an adjustable throat, which divides an extension adjusting sheet into two sections: a movable section and a fixed section, thus reducing the operation force of the adjustable throat; furthermore, the spraying pipe has the advantages of light structural weight, small dimension and the like. Furthermore, by the clearance existing between the fixed section and the movable section, the cooling to the fixed section can be reinforced. Furthermore, as the rear part of the extension adjusting sheet is provided with the fixed section, the whole structure is firmer and the weight of the whole structure is lightened, thus leading the thrust weight ratio of the engine to have larger lifting space.
Description
Technical field
The present invention relates to the multi-mode spraying pipe with adjustable throat for ramjet engine design.
Background technique
Air breathing jet engine is divided into two classes: the one, and the turbojet engine of band special-purpose air gas compressor, the 2nd, the ram-air air breathing engine of no special-purpose gas compressor.Turbojet engine developed for four generations so far.Its work envelope curve can reach: flight Mach number Ma=2.0-2.5, height H=0-24km.It is adjustable that its jet pipe develops into venturi already, the complete venting gas appliance of function that the outlet also can be independently adjustable.Its structure of the ejector exhaust pipe of this motor is very complicated.Be the manufacture cost surge of jet pipe therewith accordingly.According to U.S. P﹠amp; The W company introduction, the 4th generation machine the jet pipe manufacture cost accounted for 1/3rd of whole motor, see some from this.As for athodyd, it mainly offered guided missile and target drone as power in the past, and working state is single comparatively speaking, and what adopt usually is that uncontrollable jet pipe is the fixing jet pipe of venturi and outlet, simple in structure.
When the flight envelope of further expansion pressed engine and installation application target, multi-modal adjustable receipts expand that jet pipe has just become its indispensable technology and the parts that must adopt.Under this background, the meeting that those skilled in the art is very natural is expected using for reference the jet pipe technology of turbojet engine and being transplanted on the pressed engine.Thing is but not simple like this.The jet pipe blow down ratio (also claiming expansion ratio) that at first will run into pressed engine when the M number reaches 3.0-3.5 here is up to 40-50, and the blow down ratio of the jet pipe of turbojet engine only is about 20, has differed one times.If indiscriminately imitate the jet pipe of turbojet engine, have such result: or the thrust performance when sacrificing high speed significantly, or further increase structural complexity and strengthened quality and cost, these all are that everybody is reluctant to see.
In addition, expand in multi-modal receipts under the working state and major parameter of jet pipe, the outlet fuel gas temperature of engine chamber up to 2000K about, be higher than high temperature metallic material limiting temperature allowable commonly used at present far away, must take effective cooling method to flap, to guarantee the proper functioning of flap; On the other hand,, improve the vital capacity of aircraft, also must reduce the flap wall temperature, reduce the infrared signal of jet pipe wall in order to reduce the infrared radiation of engine exhaust device.
Cold-peace external cooling dual mode in the cooling method of general axis symmetry flap and diaphragm seal is divided into.It is several that interior cold mode mainly contains converging portion convection heat exchange and converging portion thermal baffle+extending section air film cooling etc., and external cooling method mainly is to introduce the jet pipe ring cavity from the additional-air inlet goalkeeper ambient atmosphere of intake duct or fuselage to carry out the convection current cooling.
In general, the high-temperature zone of flap wall appears at extending section, and for the ejector exhaust pipe of high blow down ratio, in order to reach thrust performance preferably, its extending section is all long.Traditional interior cold external cooling scheme that adds can not meet the demands, because the cooling air film that comes out from thermal baffle decay gradually along with the turbulent mixing of cooling blast and main flow combustion gas causes the back segment of extending section not cool off preferably like this.
Summary of the invention
For overcoming the problems referred to above, the present invention proposes a kind of solution of multi-modal adjustable throat jet pipe, will expanding adjustment sheet, to be divided into two sections be active segment and holding part, can reduce the steering force of adjustable throat like this, and it is lighter to have a structure weight, characteristics such as size is little.In addition, by the gap that utilizes holding part and active segment to exist, can strengthen cooling between the two to holding part.Moreover because the rear portion of expansion adjustment sheet is a holding part, it is more firm that total becomes, and weight has also obtained alleviating.
According to an aspect of the present invention, provide a kind of multi-mode spraying pipe with adjustable throat for ramjet engine, it is characterized in that comprising:
Along a plurality of convergence adjustment sheets that circumferentially are provided with;
Along a plurality of expansion adjustment sheet active segments that circumferentially are provided with, its each front end links to each other with corresponding convergence adjustment sheet by a linkage;
Along a plurality of holding parts that circumferentially are provided with, the rear end of described expansion adjustment sheet active segment joins with the mode and the described holding part of corresponding holding part with slide relative.
Description of drawings
Fig. 1 has schematically shown the structure of multi-mode spraying pipe with adjustable throat for ramjet engine according to an embodiment of the invention.
Fig. 2 has schematically shown the auxiliary motion chain of multi-mode spraying pipe with adjustable throat for ramjet engine according to an embodiment of the invention, promptly adjustment sheet and between the setting of diaphragm seal.
Fig. 3 A-3C has schematically shown the structure of the expansion holding part of multi-mode spraying pipe with adjustable throat for ramjet engine according to an embodiment of the invention.
Fig. 4 has schematically shown the jet pipe cooling flowing path figure of multi-mode spraying pipe with adjustable throat for ramjet engine according to an embodiment of the invention.
Embodiment
As shown in Figure 1, multi-mode spraying pipe with adjustable throat for ramjet engine according to an embodiment of the invention comprises:
The regulating ring 2 of the secondary and rolling pair of Tape movement;
Along a plurality of (for example 9) convergence adjustment sheet 5 that circumferentially is provided with, respectively there is a double hinge mechanism 4,6 at the two ends of each convergence adjustment sheet 5;
Along a plurality of expansion adjustment sheets 14 that circumferentially are provided with, its each front end links to each other with corresponding convergence adjustment sheet 5 by linkage 6;
Along a plurality of holding parts 12 that circumferentially are provided with, the rear end of described expansion adjustment sheet 14 joins with corresponding holding part 12 by sliding pin 10.
Bossed ridge 7 is designed at back at convergence adjustment sheet 5, and ridge 7 is made the same profile of circular arc cam.When regulating ring 2 is done axial motion downstream,, drive convergence adjustment sheet 5 and do inwardly to rotate by the rolling of roller 3 on profile; And when regulating ring 2 was upstream done axial motion, the gas pressure in the venturi made convergence adjustment sheet 5 do outwards to rotate.Because whole kinematic chain has only one degree of freedom and is operated by a driving lever 1, so motion is stable.Driving lever 1 also is the main load supporting system of adjustable jet of the present invention, and the function of adjustable jet is mainly implemented by it.
The extending section of present embodiment comprises active segment 8 and holding part 12 two-part.
A, active segment
As shown in Figure 1, the front portion of active segment 8 links to each other with convergence adjustment sheet 5 by linkage 6, the rear portion of active segment 8 then is inserted in the elongated slot 19 on the holding part 12 front end reinforced sheets 11 by sliding pin 10, therefore when convergence adjustment sheet 5 was makeed angular motion change throat area, the front end of the active segment 8 of expansion adjustment sheet was also being followed and is being done angular motion.
Except the main movement chain, also be not enough to guarantee the reliable movement of entire mechanism, between wherein per two adjacent expansion adjustment sheets 14 diaphragm seal 15 must be set, as shown in Figure 2.Coordinate motion between them by the auxiliary motion chain between diaphragm seal 15 and the adjacent adjustment sheet 14.
Referring to Fig. 2.This auxiliary motion chain is made up of connecting rod 16, straight pin and hinge entirely, and 15 have all placed a straight pin on each adjustment sheet 14 and the diaphragm seal, is provided with on the axis pin base between 16, two connecting rods 16 of connecting rod to connect by hinge.Therefore when numerous adjustment sheets 14 and diaphragm seal 15 were done the relative angular displacement of circumferencial direction, this kinematic chain can guarantee that a definite angular distribution is all arranged between them, and is unlikely to fall into irregular touching.Do with respect to adjustment sheet 14 when diaphragm seal 15 and to draw back or during closing movement, 15 on connecting rod is done the angle rotation around bearing pin separately, and its phase angle equates.
The B holding part
According to one embodiment of present invention, the holding part 12 of extending section is that a section is the box-like structure of right-angled triangle, referring to Fig. 1 and Fig. 3 A-3C, its front portion is a toroidal cavity 20, along circumferentially adopting many (as 12) support plates 17 to link to each other with the jet pipe inside and outside wall, so structure is firm, thereby makes the structure of whole adjustable throat jet pipe more firm.
According to an embodiment, design has polylith (as 9) reinforced sheet 12 and have elongated slot 19 on each reinforced sheet on the front inner wall 18 of holding part 12, is free to slide in elongated slot 19 with the sliding pin 10 of the rear end of guaranteeing to expand adjustment sheet 14.
According to an embodiment, holding part 12 outer covers 13 direct and jet pipe are made of one, so relatively simple for structure, reliable.
The cooling scheme that is adopted as shown in Figure 4 according to one embodiment of present invention.The cold type of cooling that combines with external cooling in having adopted.Inner-cooling structure adds the cooling of extending section air film for the converging portion thermal baffle, and interior cold but air-flow a1 is from the intake duct of motor, and external refrigeration air-flow a2 is from intake duct or auxiliary intake valve.On the adjustment sheet 5 of converging portion and diaphragm seal (not shown), respectively rivet a thermal baffle 24; According to a specific embodiment, the height of the passage 25 between thermal baffle 24 and the convergence adjustment sheet 5 is greater than 23 height of the passage between engine crankcase 21 and the firing chamber heat screen 22.Like this, from the complete basically flow channel 25 of cooling blast a1 that passage 23 flows out.Cooling blast a1 can cool off convergence adjustment sheet 5 and diaphragm seal, behind its flow pass 25, forms the cooling air film of the last one near nozzle throat 26, effectively coolant expansion adjustment sheet 14 and diaphragm seal 15 (Fig. 2).According to one embodiment of present invention, expansion adjustment sheet 14 outside back are provided with cooling channel 9 (as the cooling channel 9 of rectangular cross-section), to strengthen the cooling to expansion adjustment sheet 14.
Because extending section is designed to active segment 8 and holding part 12 and has gap 27 between the two, outer cold airflow a2 can be from the gap 27 flows into the jet pipe inside, the so better holding part 12 of coolant expansion adjustment sheet, thus the back segment that overcomes the prior art extending section can not get the better shortcoming of cooling.According to a kind of embodiment, the flow that cools off air-flow a2 outward accounts for 1%～3% of the total air inflow of motor.
Outer cooling air a2 enters in the jet pipe ring cavity 20 that is made of adjustment sheet and jet pipe outer cover 13, not only can cool off the adjustment sheet outer wall, but and moving link in the cooling spray pipe chamber and hydraulic actuation system.
Claims (10)
1. multi-mode spraying pipe with adjustable throat for ramjet engine is characterized in that comprising:
Along a plurality of convergence adjustment sheets (5) that circumferentially are provided with;
Along a plurality of expansion adjustment sheet active segments (8) that circumferentially are provided with, its each front end is continuous with corresponding convergence adjustment sheet (5) by a linkage (6);
Along a plurality of holding parts (12) that circumferentially are provided with, the rear end of described expansion adjustment sheet active segment (8) joins with mode and the described holding part (12) that slides with the described holding part (12) with respect to correspondence.
2. multi-mode spraying pipe with adjustable throat for ramjet engine as claimed in claim 1 is characterized in that:
Described a plurality of holding part (12) links to each other with the outer wall (13) of described adjustable throat jet pipe by the many support plates (17) along circumferentially setting, thereby makes the structure of described adjustable throat jet pipe more firm.
3. multi-mode spraying pipe with adjustable throat for ramjet engine as claimed in claim 1 is characterized in that:
On the front inner wall (18) of each described holding part (12), be provided with reinforced sheet (11),
On each described reinforced sheet (11), have elongated slot (19), a sliding pin (10) that links to each other with the rear end of described movable expansion adjustment sheet active segment (8) can be free to slide in described elongated slot (19), thereby the rear end of described expansion adjustment sheet active segment (8) is joined with mode and the described holding part (12) that slides with the described holding part (12) with respect to correspondence.
4. multi-mode spraying pipe with adjustable throat for ramjet engine as claimed in claim 1 is characterized in that:
Between described active segment (8) and described holding part (12), be provided with a gap (27), make outer cold airflow (a2) flow into described adjustable throat jet pipe inside, thereby cool off described holding part (12) better from described gap (27) from engine inlets or auxiliary intake valve.
5. multi-mode spraying pipe with adjustable throat for ramjet engine as claimed in claim 4 is characterized in that:
In the jet pipe ring cavity (20) of cooling air-flow (a2) inflow by outer cover (13) formation of described active segment (8) and described holding part (12) and described jet pipe, not only cool off the outer wall of described active segment (8) and described holding part (12) but also cool off described jet pipe ring cavity (20) interior moving link and hydraulic actuation system outside described.
6. the multi-modal adjustable throat of the pressed engine as claimed in claim 4 pipe of disputing is characterized in that:
The outside back of expansion adjustment sheet (14) of described active segment (8) is provided with cooling channel (9), and the part of described outer cold airflow (a2) can flow into described cooling channel (9), to strengthen the cooling to expansion adjustment sheet (14).
7. multi-mode spraying pipe with adjustable throat for ramjet engine as claimed in claim 5 is characterized in that:
Described holding part (12) directly is made of one with described outer cover (13), and it is the box-like structure of right-angled triangle that described holding part (12) constitutes section with described outer cover (13), and the front portion of this box-like structure constitutes a toroidal cavity (20).
8. as any one described multi-mode spraying pipe with adjustable throat for ramjet engine among the claim 1-7, it is characterized in that further comprising:
A regulating ring (2);
Be arranged on the ridge (7) on the back of restraining adjustment sheet (5), described ridge (7) has the profile of circular arc cam shape,
When described regulating ring (2) when doing axial motion, described regulating ring (2) acts on the described profile by a roller (3), makes the venturi (26) of adjustable throat jet pipe and dwindles or open motion thereby drive described a plurality of convergence adjustment sheets (5).
9. multi-mode spraying pipe with adjustable throat for ramjet engine as claimed in claim 8 is characterized in that further comprising:
Described active segment (8) comprises expansion adjustment sheet (14) and is arranged on expansion diaphragm seal (15) between the described expansion adjustment sheet (14);
The thermal baffle (24) that on each convergence adjustment sheet (5) and each convergence diaphragm seal, is provided with, thereby cold but passage (25) in forming between described thermal baffle (24) and described convergence adjustment sheet (5) and convergence diaphragm seal, cold but passage (25) is used to receive the interior cold but air-flow (a1) from the intake duct of motor in this.
10. multi-mode spraying pipe with adjustable throat for ramjet engine as claimed in claim 9 is characterized in that:
Cold but air-flow (a1) can form the cooling air film of the last one behind the cold but passage (25) in described near described venturi (26) in outflow is described, thereby cools off the described expansion adjustment sheet (14) and the described expansion diaphragm seal (15) of described active segment (8) effectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100863895A CN101576025B (en) | 2009-06-11 | 2009-06-11 | Multi-mode spraying pipe with adjustable throat for ramjet engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100863895A CN101576025B (en) | 2009-06-11 | 2009-06-11 | Multi-mode spraying pipe with adjustable throat for ramjet engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101576025A CN101576025A (en) | 2009-11-11 |
| CN101576025B true CN101576025B (en) | 2010-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100863895A Expired - Fee Related CN101576025B (en) | 2009-06-11 | 2009-06-11 | Multi-mode spraying pipe with adjustable throat for ramjet engine |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251879B (en) * | 2011-06-09 | 2013-10-16 | 北京航空航天大学 | Differential adjustable unilateral expansion nozzle |
| CN105952550B (en) * | 2016-06-02 | 2018-06-26 | 江西洪都航空工业集团有限责任公司 | A kind of slide bar type punching engine becomes mode adjustable throat jet pipe |
| CN106050469B (en) * | 2016-07-01 | 2019-03-08 | 南京航空航天大学 | A kind of nozzle structure and adjusting method realizing throat area and adjusting with thrust vectoring |
| CN108999726B (en) * | 2018-05-23 | 2020-02-11 | 中国航天空气动力技术研究院 | Ramjet engine with liquid aviation kerosene atomized at high speed in advance |
| CN109356747A (en) * | 2018-12-13 | 2019-02-19 | 西安航天动力研究所 | A kind of adjustable punching engine jet pipe of larynx diameter |
| FR3100284B1 (en) * | 2019-08-30 | 2021-12-03 | Safran Aircraft Engines | COUPLE CONVERGENT-DIVERGENT FLAP FOR VARIABLE GEOMETRY TURBOREACTOR NOZZLE WHOSE SHUTTERS EACH INCLUDE A COOLING AIR CIRCULATION DUCT |
| CN110500199B (en) * | 2019-09-29 | 2020-07-21 | 北京动力机械研究所 | Two-dimensional spray pipe adjusting device with adjustable throat and outlet area |
| CN112780441B (en) * | 2019-11-05 | 2022-04-12 | 北京动力机械研究所 | Variable flow passage ramjet engine and design and adjustment method |
| CN113107701B (en) * | 2021-04-28 | 2022-02-22 | 中国航发沈阳发动机研究所 | Adjustable spray pipe structure |
| CN113530707A (en) * | 2021-08-16 | 2021-10-22 | 中国航发贵阳发动机设计研究所 | Spray pipe heat insulation layer structure and installation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5394803A (en) * | 1994-02-14 | 1995-03-07 | Bel Electronics, Inc. | Joint construction between military rocket motor and warhead and releasable by melting of fusible eutectic wedging ring for operating flexible locking fingers |
| CN2319127Y (en) * | 1998-03-13 | 1999-05-19 | 王立英 | Prolonged dual-throat internally mixed pneumatic atomizing nozzle |
| EP1930579A2 (en) * | 2006-11-30 | 2008-06-11 | United Technologies Corporation | Thermally decoupled mixer |
-
2009
- 2009-06-11 CN CN2009100863895A patent/CN101576025B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5394803A (en) * | 1994-02-14 | 1995-03-07 | Bel Electronics, Inc. | Joint construction between military rocket motor and warhead and releasable by melting of fusible eutectic wedging ring for operating flexible locking fingers |
| CN2319127Y (en) * | 1998-03-13 | 1999-05-19 | 王立英 | Prolonged dual-throat internally mixed pneumatic atomizing nozzle |
| EP1930579A2 (en) * | 2006-11-30 | 2008-06-11 | United Technologies Corporation | Thermally decoupled mixer |
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| CN101576025A (en) | 2009-11-11 |
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Granted publication date: 20101103 Termination date: 20130611 |