CN109611237A - A kind of memorial alloy driving front duct ejector of variable cycle engine adjustable mechanism - Google Patents
A kind of memorial alloy driving front duct ejector of variable cycle engine adjustable mechanism Download PDFInfo
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- CN109611237A CN109611237A CN201811453662.9A CN201811453662A CN109611237A CN 109611237 A CN109611237 A CN 109611237A CN 201811453662 A CN201811453662 A CN 201811453662A CN 109611237 A CN109611237 A CN 109611237A
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- memory alloy
- alloy wire
- crank
- valve body
- driving fan
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
- F02K1/28—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto using fluid jets to influence the jet flow
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
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Abstract
The present invention relates to a kind of memorial alloys of variable cycle engine adjustable mechanism to drive front duct ejector, comprising: core driving fan casing, memory alloy wire pedestal, pulley, memory alloy wire, locking wire device, gasket, crank, flexural pivot lid, flexural pivot bead, connecting rod, stud, stud bracket, valve body and bias spring.The present invention is using memory alloy wire as mechanism actuator, when being heated up by external electric since shape memory effect length shortens, its displacement generated is amplified by the leverage of crank, being transmitted on valve body by connecting rod again turns down it, and then the flow that temperature control flows to by-pass air duct from core driving fan grade is adjusted, when stopping electric heating, memorial alloy is in low-temperature phase, bias spring pulls valve body to open, while stretching memory alloy wire and being at stress state.The mechanism cooperates other adjustable mechanisms that can complete the transformation of variable cycle engine working condition, has many advantages, such as that construction weight is small, movement is reliable, it is small to influence on runner.
Description
Technical field
The present invention relates to a kind of memorial alloys of variable cycle engine adjustable mechanism to drive front duct ejector, for realizing
The conversion of front duct ejector state, to adjust the working condition of engine, belongs to the high-performance gas whirlpool in aeronautical and space technology
Turbine technical field.
Background technique
External variable cycle engine is started in the 1970s, the scheme proposed is varied and have been subjected to and deeply grind
Study carefully, has there is the model by experimental verification at present, and domestic variable cycle engine design 21 century just starts to carry out, at present also
In principle research and design scheme stage of fumbling.
Variable cycle engine refers to geometry, size or position by changing the certain components of engine to change its heat
The gas-turbine unit of power circulation.Its typical adjustable mechanism mainly has three parts: mode switching valve, front duct ejector and after
Culvert channel injector, wherein for front duct ejector between core driving fan and by-pass air duct, effect is to adjust core driving
Fan grade thinks the flow of by-pass air duct drainage, and other adjustable mechanisms is cooperated to complete the change of engine cycle.
Front duct ejector, which is one, can change the valve of core duct and by-pass air duct air flow rate, it can be achieved that two wind
Deflation between sector can make fan outlet pressure, compressor intake pressure and chamber pressure, turbine outlet pressure phase
Match, improves the stability margin of engine operation.
Chinese patent 200910242865.8 proposed a kind of variable cycle engine front duct ejector design in 2009,
Its valve body is taper, and using flatly moving type, pressurized strut is directly connected with valve body, realizes that runner opens big, pass using the push-and-pull of pressurized strut
The adjusting of small two states, structure is simple, but the disadvantage is that pressurized strut be directly arranged at it is larger to airflow influence in outer culvert runner, and
Pressurized strut weight, volume are larger.
Chinese patent 201410168707.3 proposed a kind of variable cycle engine front duct ejector design in 2014,
Its valve body is cylindricality, and using flatly moving type, pressurized strut is located at outside outer casing, is made up of components such as connecting rod, shaft, valve body pull rods
Mechanism can make the by-pass air duct that moves across of pressurized strut be transferred to valve body, therefore its external culvert runner influence is smaller, and has higher-dimension
The advantages that repairing property, high reliability, but the disadvantage is that transmission parts are more and weight is big, using the biggish pressurized strut of weight as driving,
Thus increase the complexity of engine control system.
Summary of the invention
Technology of the invention solves the problems, such as: to overcome the prior art in construction weight, mechanism complexity, control system
The deficiency of complexity etc. provides a kind of memorial alloy driving front duct ejector of variable cycle engine adjustable mechanism, leads to
It crosses to memory alloy wire heating, cooling, moves its driving mechanism, so that the injector between the inside and outside duct of engine be made to go out
Open area is continuously adjustable, and mechanism is simple, and number of parts is few, light-weight.
The technical solution of the invention is as follows: duct draws before a kind of memorial alloy of variable cycle engine adjustable mechanism drives
Emitter, it is characterised in that: core driving fan casing, memory alloy wire pedestal, pulley, memory alloy wire, locking wire device, gasket,
Crank, flexural pivot lid, flexural pivot bead, connecting rod, stud, stud bracket, valve body, bias spring；Core driving fan casing and memory
Alloy wire pedestal is bolted；Two pulleys are fixed on memory alloy wire pedestal by bolt and nut；Two locking wire devices
The both ends of memory alloy wire are fixed on memory alloy wire pedestal and crank by screw thread respectively；Memory alloy wire passes through two
The structural bending of pulley and memory alloy wire pedestal；Crank, which connect to be formed with core driving fan casing by bolt and gasket, to be turned
Dynamic pair；Flexural pivot lid is connect by 4 bolts with crank；Flexural pivot bead is clipped between flexural pivot lid and crank and forms spherical pair；Connecting rod with
Flexural pivot bead is connected through a screw thread；Connecting rod forms cylindrical pair with stud and connect；Stud is bolted with stud bracket；Stud
Bracket is bolted with valve body by 4；Valve body is connect with core driving fan casing by guide rail；Bias spring two ends of the hook
It hangs between memory alloy wire pedestal and valve body.
Have at the boss for being used to install memory alloy wire pedestal at 2 and thereon each 2 above the core driving fan casing
Bolt hole, at 2 for install crank boss and thereon at each 1 bolt hole memory alloy wire pedestal is 2, be symmetrically arranged in core
Outside heart driving fan casing, respectively have at 2 above for installing the through-hole of pulley, at 1 for install locking wire device screw boss,
Through-hole at 2 for being connect with core driving fan casing.
The crank is 2, is symmetrically arranged in outside core driving fan casing, is respectively had at 1 above for installing locking wire
The screw boss of device, the through-hole at 1 for connect with core driving fan casing, the spherical shape for being used to cooperate with flexural pivot bead at 1
Groove, the bolt hole at 4 for being connect with flexural pivot lid.
The stud bracket is 2, is symmetrically arranged in outside valve body, respectively there is the through-hole for being used to install stud at 1,4 above
Through-hole of the place for being connect with valve body.
There is bolt hole at the boss for being used to install stud bracket at 2 and thereon each 4 above the valve body.
The present invention is that a kind of memorial alloy of variable cycle engine adjustable mechanism drives front duct ejector, by memory
Alloy wire heating, cooling, move its driving mechanism, so that the injector discharge area between the inside and outside duct of engine be made to connect
Continue adjustable, advantage is as follows:
(1) using memory alloy wire be used as driving part, compared with by hydraulic actuator driving regulating mechanism phase
Than actuator weight and volume is all reduced.
On the outside of core driving fan casing circumferentially, driving part is placed in outer machine to the present invention by same type mechanism
Outside casket, it will be moved by complicated transmission parts and be transferred on the valve body of core driving fan casing through runner, overall structure
Weight is big, volume is big, and the present invention will drive, transmission mechanism is arranged in the core driving fan casing near valve body, reduces machine
Structure is driven distance, mitigates overall weight.
(2) radial dimension is smaller, except driving part because heat exchange needs to be placed in flow field in the present invention, other transmission parts
Circumferentially along core driving fan casing, in the design runlength of mechanism, vacant flow channel space externally contains air-flow shadow
Sound is small.
Detailed description of the invention
Fig. 1 is the axis surveys view that memorial alloy of the present invention drives front duct ejector
Fig. 2 is the front view that memorial alloy of the present invention drives front duct ejector；
Fig. 3 is the top view that memorial alloy of the present invention drives front duct ejector；
Fig. 4 is the right view that memorial alloy of the present invention drives front duct ejector；
Fig. 5 is the partial structural diagram of core driving fan casing of the present invention；
Fig. 6 is the structural schematic diagram of memory alloy wire pedestal of the present invention；
Fig. 7 is the cross section view of pulley of the present invention；
Fig. 8 is the cross section view of locking wire device of the present invention；
Fig. 9 is the structural schematic diagram of crank of the present invention；
Figure 10 is the partial enlargement structural representation 1 of crank of the present invention；
Figure 11 is the partial enlargement structural representation 2 of crank of the present invention；
Figure 12 is the structural schematic diagram of flexural pivot lid of the present invention；
Figure 13 is the structural schematic diagram of flexural pivot bead of the present invention；
Figure 14 is the structural schematic diagram of connecting rod of the present invention；
Figure 15 is the structural schematic diagram of pin shaft of the present invention；
Figure 16 is the structural schematic diagram of inventive pin bracing strut；
Figure 17 is the partial structural diagram 1 of valve body of the present invention；
Figure 18 is the partial structural diagram 2 of valve body of the present invention.
Symbol description is as follows in figure:
1. core driving fan casing, the rectangular installation base of 1-1., rectangular the first threaded hole of installation base of 1-2., the side 1-3
The second threaded hole of shape installation base, 1-4 circular mounting boss, 1-5 threaded hole, 2. memory alloy wire pedestals, 2-1 connection pedestal,
The first circular through hole of 2-2, the second circular through hole of 2-3,2-4 slide bar, 2-5 rhomboid boss, 2-6 rhomboid boss threaded post, 2-
7 bearing brackets, 2-8 bearing bracket first lug, the second lug of 2-9 bearing bracket, 2-10 hook, 3 pulleys, 4 memorial alloys
Silk, 5 locking wire devices, 5-1 through-hole, 5-2 internal screw thread, 6 gaskets, 7 cranks, 7-1 crankshaft through-hole, the long end structure of 7-2 crank, 7-3
Crank short end structure, 7-4 crank short end structure threaded post, the long end structure spherical groove of 7-5 crank, the long end structure screw thread of 7-6 crank
Hole, 8 flexural pivot lids, 8-1 through-hole * 4,8-2 spherical inside surface, 9 flexural pivot beads, 9-1 external screw thread, 10 connecting rod of 9-2 spherical surface, 10-1 are logical
Hole, 10-2 threaded hole, 11 pin shafts, 11-1 cylinder, 11-2 threaded hole, 12 pin shaft brackets, 12-1 lug, 12-2 lug through-hole,
12-3 connecting platform, 12-4 connecting platform through-hole, 13 valve bodies, 13-1 square boss, 13-2 square boss threaded hole, 13-3 are hung
Hook, 14 bias springs
Specific embodiment
The connection type of memorial alloy driving front duct ejector in the present invention is as follows:
As shown in Figure 1, Figure 2, Figure 3, Figure 4, core driving fan casing 1 passes through two spiral shells on rectangular installation base 1-1
Pit 1-2,1-3 are connected with through-hole 2-2,2-3 fitted bolt of memory alloy wire pedestal 2, and two pulleys 3 use bolt, nut
It is mounted at two lugs 2-8,2-9 of memory alloy wire pedestal 2, memory alloy wire 4 is connected to by 5 both ends of locking wire device
Threaded post 7- on threaded post 2-6 on the rhomboid boss 2-5 of memory alloy wire pedestal 2 and in the short end structure 7-3 of crank 7
On 4,4 middle section of memory alloy wire bypasses pulley 3 and slide bar 2-4 at two, the circle of crank 7 bolt and core driving fan casing 1
The threaded hole 1-5 connection of shape installation base 1-4, the spherical groove 7-5 of the spherical surface 9-2 and the long end structure 7-2 of crank of flexural pivot bead 9
Cooperation, flexural pivot lid 8 passes through its four through-hole 8-1 by four screws and the long end structure 7-2 of crank connects at four threaded hole 7-6
It connects and spherical inside surface 8-2 and spherical surface 9-2 cooperates, connecting rod 10 and flexural pivot bead 9 are connected by external screw thread 9-1 and threaded hole 10-2
It connects, connecting rod 10 and pin shaft 11 pass through through-hole 10-1 and cylinder 11-1 and utilize bolt and threaded hole with cylindrical pair, pin shaft 11 is combined into
11-2 is connected on the through-hole 12-2 in two lug 12-1 on pin shaft bracket 12, and pin shaft bracket 12 passes through connecting platform 12-3
On four through-hole 12-4 be connected with four threaded hole 13-2 in the square boss of valve body 13 using bolt, the extension of bias spring 14
Between hook 13-3,2-10
The specific embodiment of memorial alloy driving front duct ejector in the present invention is as follows:
Primary structure of the invention is uniformly distributed circumferentially four outside core driving fan casing, the tool of every set mechanism
Body running process is as described below.When temperature is lower than memorial alloy phase transition temperature, that is, after passing through the cooling of runner air-flow, bias spring
14 direct pull valve bodies 13 are allowed in the open state, are moved therewith by the connecting rod 10 that cylindrical pair is connected, pass through spherical surface
Pair rotates crank 7, pulls the elongation load of memory alloy wire 4, austenite phase occurs after memory alloy wire 4 is by Resistant heating
Become the shape before restoring load, crank 7 is pulled to rotate, and then pull valve body 13 to turn down by connecting rod 10, reaches control runner stream
Amount, the purpose for changing cycle of engine state.
As shown in figure 5, memory alloy wire pedestal 2 is mounted on the rectangular mounting platform 1-1 of core driving fan casing 1,
Its middle section is cylindrical surface, matches with the connection pedestal 2-1 lower cylindrical face of memory alloy wire pedestal 2, determines memory alloy wire
2 radial positioning of pedestal, two sections of rectangular mounting platform 1-1 are plane, and there are two threaded hole 1-2,1-3, bolts to pass through memory for processing
Circular through hole 2-2,2-3 of alloy wire pedestal 2 are matched, determine the axial, circumferentially positioned of memory alloy wire pedestal 2；It is round
Shaft of the installation base 1-4 as crank 7 is connect by bolt, threaded hole 1-5 with gasket 6, the column of circular mounting boss 1-4
Face and the radial direction of core driving fan casing 1 are angled, so that the movement of crank 7 is taken up space closer to main shaft, reduce machine
Influence of the structure to runner air-flow.
As shown in fig. 6, memory alloy wire 4 is mounted on the cunning of lug 2-8,2-9 on memory alloy wire pedestal 2 by two
Middle section a part is placed in radial more outer position by 3 and slide bar 2-4 of wheel, which is sufficiently placed in flow field to accelerate to change
Heat, the mode conversion speed of hoisting mechanism, the central axes bearing bracket 2-7 are overlapped with stress, increase structural strength, connect pedestal 2-
1 positions for cooperating with core driving fan casing 1, and through-hole 2-2,2-3 has a spiral shell for being bolted thereon on boss 2-5
Line column 2-6 is for connecting locking wire device 5, and hook 2-10 is for connecting bias spring 14.
As shown in fig. 7,3 center of pulley devises groove, memory alloy wire 4 is limited in middle position.
As shown in figure 8, internal screw thread 5-2 is used for connection screw thread column, memory alloy wire 4 is pierced by from through-hole 5-1.
As shown in figure 9, the design of crank 7 has through-hole 7-1 to be used to form revolute pair, long end structure 7-2 is connect with connecting rod, short end
Structure 7-3 is connect with memory alloy wire, and the deformation of memory alloy wire is amplified in long short end cooperation, is transferred to connecting rod.
It as shown in Figure 10, is crank short end structure 7-3, structure design has a threaded post 7-4 for connecting locking wire device.
It as shown in figure 11, is the long end structure 7-2 of crank, 4 threaded hole 7-6 of the structure are used for connected ball hinge cap 8, hemisphere
Face groove 7-5 is used to cooperatively form spherical pair with flexural pivot bead 9.
As shown in figure 12, flexural pivot lid 8 is arranged circumferentially 4 through-hole 8-1 for being bolted, and groove 8-2 is spherical surface
A part cooperates with hemisphere face groove 7-5 and encases flexural pivot bead 9 to form spherical pair.
As shown in figure 13, the threaded post 9-1 of flexural pivot bead 9 with connecting rod 10 for connecting, spherical surface 9-2 and the long end structure of crank
Groove 8-2 in the hemisphere face groove 7-5 and flexural pivot lid 8 of 7-2 cooperatively forms spherical pair.
As shown in figure 14,10 tail portion of connecting rod has a threaded hole 10-2 for connecting with flexural pivot bead, head through-hole 10-1 set
On pin shaft 11, cylindrical pair is formed.
As shown in figure 15, the cylinder 11-1 of pin shaft 11 leaves enough axial spaces and slides to connecting rod 10, threaded hole 11-
2 are fixed on pin shaft on pin shaft bracket 12 with bolt cooperation.
As shown in figure 16, there are two lug 12-1 for the side arrangement of pin shaft bracket 12, respectively there is a through-hole 12-2 supply and marketing thereon
Axis 11 passes through, and has 4 through-hole 12-4 on the rectangle installation base 12-3 of the other side, cooperates with bolt and is fixed on pin shaft bracket 12
On valve body.
As shown in figure 17, circumferentially there are two installation base 13-1 to be used for mounting pin bracing strut 12 for valve body 13, there is 4 spiral shells thereon
Pit 13-2 is for being bolted.Valve body 13 is axially moveable using sliding rail limitation, and shaft orientation moving range is controlled by limited block.
As shown in figure 18, there are two hooks for hanging bias spring 14 for the design of valve body 13.
Claims (6)
1. a kind of memorial alloy of variable cycle engine adjustable mechanism drives front duct ejector characterized by comprising core
Driving fan casing, memory alloy wire pedestal, pulley, memory alloy wire, locking wire device, gasket, crank, flexural pivot lid, flexural pivot bead,
Connecting rod, pin shaft, stud bracket, valve body and bias spring；Core driving fan casing and memory alloy wire pedestal are connected by bolt
It connects；Two pulleys are fixed on memory alloy wire pedestal by bolt and nut；Two locking wire devices pass through screw thread respectively and close memory
The both ends of spun gold are fixed on memory alloy wire pedestal and crank；Memory alloy wire passes through two pulleys and memory alloy wire pedestal
Structural bending；Crank connect to form revolute pair by bolt and gasket with core driving fan casing；Flexural pivot lid passes through 4 spiral shells
Bolt is connect with crank；Flexural pivot bead is clipped between flexural pivot lid and crank and forms spherical pair；Connecting rod is connected through a screw thread with flexural pivot bead；
Connecting rod forms cylindrical pair with stud and connect；Stud is bolted with stud bracket；Stud bracket and valve body pass through 4 bolts
Connection；Valve body is connect with core driving fan casing by guide rail；Bias spring two ends of the hook hang over memory alloy wire pedestal with
Between valve body.
2. the memorial alloy of variable cycle engine adjustable mechanism according to claim 1 drives front duct ejector, special
Sign is: having spiral shell at the boss for being used to install memory alloy wire pedestal at 2 and thereon each 2 above the core driving fan casing
Keyhole, at 2 for installing the boss and bolt hole at each 1 thereon of crank.
3. the memorial alloy of variable cycle engine adjustable mechanism according to claim 1 drives front duct ejector, special
Sign is: the memory alloy wire pedestal is 2, is symmetrically arranged in outside core driving fan casing, respectively has at 2 be used for above
The through-hole of pulley is installed, is led to for what is connect with core driving fan casing for installing the screw boss of locking wire device, at 2 at 1
Hole.
4. the memorial alloy of variable cycle engine adjustable mechanism according to claim 1 drives front duct ejector, special
Sign is: the crank is 2, is symmetrically arranged in outside core driving fan casing, is respectively had at 1 above each crank for pacifying
It fills the screw boss of locking wire device, the through-hole at 1 for connect with core driving fan casing, be used at 1 and the cooperation of flexural pivot bead
Spherical groove, the bolt hole at 4 for being connect with flexural pivot lid.
5. the memorial alloy of variable cycle engine adjustable mechanism according to claim 1 drives front duct ejector, special
Sign is: the stud bracket is 2, is symmetrically arranged in outside valve body, is respectively had at 1 above each thread rack for installing spiral shell
The through-hole of column, the through-hole at 4 for being connect with valve body.
6. the memorial alloy of variable cycle engine adjustable mechanism according to claim 1 drives front duct ejector, special
Sign is: having bolt hole at the boss for being used to install stud bracket at 2 and thereon each 4 above the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811453662.9A CN109611237B (en) | 2018-11-30 | 2018-11-30 | Memory alloy driven front duct ejector of variable cycle engine adjustable mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811453662.9A CN109611237B (en) | 2018-11-30 | 2018-11-30 | Memory alloy driven front duct ejector of variable cycle engine adjustable mechanism |
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| Publication Number | Publication Date |
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| CN109611237A true CN109611237A (en) | 2019-04-12 |
| CN109611237B CN109611237B (en) | 2020-05-22 |
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| CN201811453662.9A Active CN109611237B (en) | 2018-11-30 | 2018-11-30 | Memory alloy driven front duct ejector of variable cycle engine adjustable mechanism |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410230A (en) * | 2019-08-07 | 2019-11-05 | 北京航空航天大学 | A kind of flake type overall deformation rear culvert channel injector in variable cycle engine |
| CN113309636A (en) * | 2021-07-01 | 2021-08-27 | 西北工业大学 | Double-duct injection device for aircraft engine |
| CN113442167A (en) * | 2021-06-21 | 2021-09-28 | 长春工业大学 | Design of flexible variable-stiffness elastic driver |
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| CN101737194A (en) * | 2009-12-18 | 2010-06-16 | 北京航空航天大学 | Adjustable front duct ejector in variable cycle engine mode switching mechanism |
| CN103925115A (en) * | 2014-04-24 | 2014-07-16 | 北京航空航天大学 | Pull rod bearing translation-type front duct ejector in variable cycle engine adjustable mechanism |
| CN103993983A (en) * | 2014-04-24 | 2014-08-20 | 北京航空航天大学 | Parallel-air inlet type rear duct ejector in variable cycle engine adjustable mechanism |
| CN104314621A (en) * | 2014-10-08 | 2015-01-28 | 南京航空航天大学 | Fast responding control device of turbine leaf apex gap control system based on shape memory alloy |
| CN108019242A (en) * | 2017-12-15 | 2018-05-11 | 北京航空航天大学 | Aero-engine tip clearance active control device based on shape-memory alloy wire |
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2018
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101737194A (en) * | 2009-12-18 | 2010-06-16 | 北京航空航天大学 | Adjustable front duct ejector in variable cycle engine mode switching mechanism |
| CN103925115A (en) * | 2014-04-24 | 2014-07-16 | 北京航空航天大学 | Pull rod bearing translation-type front duct ejector in variable cycle engine adjustable mechanism |
| CN103993983A (en) * | 2014-04-24 | 2014-08-20 | 北京航空航天大学 | Parallel-air inlet type rear duct ejector in variable cycle engine adjustable mechanism |
| CN104314621A (en) * | 2014-10-08 | 2015-01-28 | 南京航空航天大学 | Fast responding control device of turbine leaf apex gap control system based on shape memory alloy |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110410230A (en) * | 2019-08-07 | 2019-11-05 | 北京航空航天大学 | A kind of flake type overall deformation rear culvert channel injector in variable cycle engine |
| CN113442167A (en) * | 2021-06-21 | 2021-09-28 | 长春工业大学 | Design of flexible variable-stiffness elastic driver |
| CN113309636A (en) * | 2021-07-01 | 2021-08-27 | 西北工业大学 | Double-duct injection device for aircraft engine |
| CN113309636B (en) * | 2021-07-01 | 2022-07-29 | 西北工业大学 | Double-duct injection device for aircraft engine |
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| Publication number | Publication date |
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| CN109611237B (en) | 2020-05-22 |
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