CN108518366B - Two-dimensional-configuration multi-support-plate ejector and application - Google Patents
Two-dimensional-configuration multi-support-plate ejector and application Download PDFInfo
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- CN108518366B CN108518366B CN201810573814.2A CN201810573814A CN108518366B CN 108518366 B CN108518366 B CN 108518366B CN 201810573814 A CN201810573814 A CN 201810573814A CN 108518366 B CN108518366 B CN 108518366B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
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- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention relates to a two-dimensional multi-support-plate ejector and application thereof, belongs to the technical field of ejector application, and provides combined application of the two-dimensional multi-support-plate ejector and a two-dimensional mixed diffusion pipeline; when the performance of the ejector pursues a large supercharging ratio and a small ejection coefficient, the two-dimensional multi-support-plate ejector and the rectangular second throat mixing diffusion pipeline are combined for application. In the application of the invention, the contact area between the multiple strands of uniform injection airflow and the injected airflow is large, and the mixing effect is good; the flow field structure in the mixed diffusion pipeline is uniform, and the shock wave loss is small. The ejector based on the application of the invention has the advantages of low operation condition and excellent performance.
Description
Technical field
The invention belongs to injector applied technical fields, and in particular to a kind of more supporting plate injectors of two dimensional configurations and answer
With.
Background technique
Injector is that a kind of gas being pressurized by high total pressure gas stream to low total pressure gas stream is mechanical.In mechanism, injection
Device is transported by injection air-flow and by turbulent flow in the mixed layer that contacts between injection air-flow, and the kinetic energy of injection air-flow transmitted
To by injection air-flow, achieve the effect that increase by injection air-flow stagnation pressure.Therefore, enhance injection air-flow and by between injection air-flow
Mixing is a kind of major way for improving injector performance.Enhancing mixing, which mainly has, increases injection air-flow and by between injection air-flow
Mixed area, design two methods of disturbance between both special-shaped nozzle exit enhancings air-flow.In the prior art, it mostly uses greatly
Scheme have: be placed in multiple groups axisymmetric nozzle in injector and increase mixed area, or nozzle exit is slotted or is made into wave
Petaloid disturbs to enhance.The following are the analyses of the prior art of Multi Nozzle Ejector:
Patent [1], multiinjector enhancing mixing injector of efficiently slotting, the application number/patent No.: 201210582386.2, hair
Bright designer: Liao Daxiong proposes jet expansion and opens rectangular channel, the multiinjector that nozzle divides inside and outside two layers and is circumferentially evenly arranged
Injector scheme；
Patent [2], a kind of three-level multi-spray-pipe central ejector, the application number/patent No.: 201210544053.0, invention is set
People: Jia Yingsheng is counted, a kind of concatenated multistage injection scheme of multi nozzle centre ejector of axial symmetry configuration is proposed, is taken out with reaching
Inhale the high effect of vacuum degree；
Patent [3], a kind of multistage Multi Nozzle Ejector hierarchy optimization method, the application number/patent No.:
201611241301.9, invention designer: Chen Pei proposes a kind of design method of multistage Multi Nozzle Ejector hierarchy optimization,
Successively to the optimization of Overall Parameters of Muffler of multiple stage ejector, injection spout layout optimization, enhancing mixing nozzles with injector parameter optimization, to reach
To technical risk is reduced, the effect of development cost is saved.
Two dimensional configurations injector in engineer application field is also rarely found, United States Patent (USP) [4], Supersonic/
Supersonic FluidEjector, the patent No.: 4379679, invention designer: Roy N.Guile proposes a kind of annular
Super injector, the transverse direction in upper and lower position are arranged multiple groups nozzles with injector and mix to injection air-flow and by injection air-flow
It closes, the injection air-flow of this scheme and small by the mixed area between injection air-flow constrains injection performance.
Currently, both at home and abroad about the technology of Multi Nozzle Ejector be mostly based on axial symmetry configuration, i.e., supersonic nozzle,
The flow channel of gas is axial symmetry configuration.The Multi Nozzle Ejector scheme of axial symmetry configuration are as follows: be built into circular channel
Multiple circumferentially distributed " L " type supersonic nozzles, and support construction is set between jet pipe and reduces vibration, this scheme has spray
The arrangement of pipe is complicated, by the big disadvantage of the flow losses of injection air-flow.In addition, in the Multi Nozzle Ejector of axial symmetry configuration
Injection air-flow be unevenly distributed in mixing chamber with by injection air-flow, will cause biggish shock loss, and then influence injection
Performance.
Summary of the invention
In order to overcome deficiency present in existing Multi Nozzle Ejector, simple, layout that the present invention provides a kind of structures is tightly
It gathers, more supporting plate injectors of good mixing effect, the uniform two dimensional configurations of flow field structure and application.
The present invention is achieved by the following technical solutions:
A kind of more supporting plate injectors of two dimensional configurations, the inside of the injector is equipped with the cavity of both ends open, described to draw
Equipped with being connected with injector internal cavities by injection air flow inlet, the other end of the injector is opened at the place open at one end of emitter
It is connected with mixing diffusion pipeline at mouthful, is conducted inside the pipeline of the mixing diffusion pipeline with injector internal cavities, it is described
The side wall of injector is equipped with more than one air collecting chamber, and one piece or more of supporting plate is equipped in the cavity of the injector, described
It is equipped between supporting plate and supporting plate and between supporting plate and injector side wall by injection air-flow subchannel, it is described to be led to by injection air-flow
The both ends in road respectively with by injection air flow inlet and mix diffusion pipeline and be conducted, the supporting plate is internally provided with jet pipe air guide
Chamber, offers more than one injection air flow inlet on the lateral wall of the air collecting chamber, the air collecting chamber and jet pipe air guide chamber it
Between by jet pipe air guide chamber air inlet be connected to, the supporting plate meet by injection airflow direction be equipped with for shunt by before injection air-flow
Diversion section is held, the inside edge of the supporting plate is provided with Laval nozzle, the entrance of the Laval nozzle by injection airflow direction
It is connected to jet pipe air guide chamber, the outlet of the Laval nozzle is connected to mixing diffusion pipeline.
Preferably, the side wall of the injector is equipped with an air collecting chamber, the lateral wall of the air collecting chamber is equipped with
More than one injection air flow inlet.
Preferably, being set on the side wall of the injector there are two air collecting chamber, two air collecting chambers are separately positioned on
On the corresponding injector side wall of branch board ends, the lateral wall of the air collecting chamber is equipped with more than one injection air flow inlet.
Preferably, the supporting plate is evenly spaced in injector internal cavities, the supporting plate is by front end diversion section, spray
Pipe air guide chamber, Laval nozzle integrated design, the appearance profile of the supporting plate are streamlined.
Preferably, the front end diversion section, which is met, is arranged taper or obtuse angle taper at an acute angle, institute by injection airflow direction
It states jet pipe air guide chamber to be connected to by jet pipe air guide chamber air inlet with air collecting chamber, the Laval nozzle is the supersonic speed of two dimensional configurations
Laval nozzle.
Preferably, the mixing diffusion pipeline is the mixing diffusion pipeline of square equal cross-section, the mixing diffuser pipe
Road includes the first cross-section section that cross section is rectangle and area equation and cross section is rectangle and area along by injection air-flow side
To the first rectangle expansion segment become larger, one end of the first cross-section section is connected with injector, first cross-section
The other end of section is connected with first lesser one end of rectangle expansion segment cross-sectional area.
Preferably, the length of the first cross-section section and the number N of supporting plate are inversely proportional, the first cross-section section
Length be by 4-10 times of injection air flow inlet width D, i.e., the length of the first cross-section section be 4-10D, first rectangle
The value range of the area ratio of expansion segment both ends cross section is 1.5~4.
Preferably, the mixing diffusion pipeline is rectangle second throat mixing diffusion pipeline, the mixing diffuser pipe
Road includes the second cross-section section, bilateral contraction section, rectangle venturi and the second rectangle expansion segment, one end of the second cross-section section
Be connected to each other with injector, the cross section of the second cross-section section is rectangle and area equation, the bilateral contraction section it is transversal
Face area along being gradually reduced by injection airflow direction, the second cross-section section other end and bilateral contraction section cross-sectional area compared with
Big one end is connected, and described bilateral biggish one end of contraction section cross-sectional area is connected with rectangle venturi, the rectangle larynx
The cross section in road is rectangle and area equation, and the cross section of the second rectangle expansion segment is rectangle and cross-sectional area edge is drawn
It penetrates airflow direction to become larger, the other end of the rectangle venturi and the second lesser one end phase of rectangle expansion segment cross-sectional area
Connection.
Preferably, the second cross-section segment length be by 0~5 times of injection air flow inlet width D, it is described bilateral
The value range of the contraction half-angle of contraction section is 1~10 °, the bilateral contraction section exit area and entrance section area it
The value range of ratio is 0.3~0.9, and the rectangle throat length is 4~10 times of rectangular channel hydraulic diameter, second square
The value range of the expansion half-angle of shape expansion segment is 2~8 °, the value of the second rectangle expansion segment both ends cross-sectional area ratio
Range is 1.5~5.
A kind of application of more supporting plate injectors of two dimensional configurations, injection air-flow enter in air collecting chamber from injection air flow inlet
Portion, the jet pipe air guide for entering branch intralamellar part by jet pipe air guide chamber air inlet is intracavitary, and from Laval nozzle to mixing diffusion
The injection air-flow of the high stagnation pressure of conveying in pipeline, at the same time by injection air-flow from being entered from injection air flow inlet, by front end
The guide functions of diversion section form multiply low pressure and are uniformly entered by injection air-flow each by injection air-flow subchannel, drawn
Stream emanate by being entered in mixing diffusion pipeline by injection air-flow subchannel, injection air-flow is mixing diffusion with by injection air-flow
Mixing in pipeline, by injection air-flow being pressurized by injection air-flow to low stagnation pressure of high stagnation pressure；When injector performance pursues small pressurization
When than, big mass ratio of induced-to-inducing air, more supporting plate injectors using two dimensional configurations with include the first cross-section section and the first rectangle expansion segment
Square equal cross-section mixing diffusion pipeline combined application；When injector performance pursues big pressure ratio, small mass ratio of induced-to-inducing air, two are used
Tie up more supporting plate injectors of configuration and including the second cross-section section, bilateral contraction section, rectangle venturi and the second rectangle expansion segment
Rectangle second throat mixing diffusion pipeline combined application.
Compared with prior art, the beneficial effects of the present invention are as follows:
1, it is equal by the jet pipe air guide chamber of multiple supporting plates to be divided into multiply by more supporting plate injectors of two dimensional configurations for injection air-flow
The even total pressure gas stream of height, by, the uniform low total pressure gas stream of multiply is divided by injection air-flow, being increased by injection air-flow subchannel
Add injection air-flow and by the contact area between injection air-flow, achievees the effect that mixing enhancing；
2, the mixing development process in diffusion pipeline is rapid, and flow field structure is equal mixing with by injection air-flow for injection air-flow
Even, shock loss is small, therefore the operating condition of injector is low, superior performance.
3, structure-integrated design, the branch of supporting plate inner nozzle air guide chamber and two-dimentional Laval nozzle, branch front edge of board diversion section
Plate outer profile is streamlined, small by the flow losses of injection air-flow.
Detailed description of the invention
Fig. 1 is schematic perspective view of the invention；
Fig. 2 is longitudinal cross-section schematic diagram of the present invention along jet pipe air guide chamber；
Fig. 3 is the transverse sectional view of the vertical supporting plate of the present invention；
Fig. 4 is the structural schematic diagram of square equal cross-section mixing diffusion pipeline of the present invention；
Fig. 5 is the structural schematic diagram of rectangle second throat mixing diffusion pipeline of the present invention；
Fig. 6 is the performance characteristics test result figure of the injector application designed according to embodiment 2.
Marginal data in attached drawing: 1: by injection air flow inlet, 2: injection air flow inlet, 3: air collecting chamber, 4: supporting plate, 5: mixed
Close diffusion pipeline, 6: jet pipe air guide chamber air inlet, 7: jet pipe air guide chamber, 8: by injection air-flow subchannel, 9: front end diversion section,
10: two-dimentional Laval nozzle, 11: the first cross-section sections, 12: the first rectangle expansion segments, 13: the second cross-section sections, 14: bilateral receipts
Contracting section, 15: rectangle venturi, 16: the second rectangle expansion segments.
Specific embodiment
Below in conjunction with attached drawing of the invention, technical solution of the present invention is clearly and completely described, it is clear that institute
Description is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field
Those of ordinary skill's every other embodiment obtained without making creative work, belongs to protection of the present invention
Range.
Embodiment 1
As shown in the picture, the invention proposes a kind of more supporting plate injectors of two dimensional configurations, the exterior configuration of injector is
Rectangle, the inside of injector are equipped with the rectangular enclosure of both ends open, and the place open at one end of injector is equipped with and sky inside injector
Chamber docking by injection air flow inlet 1, by the size of the shape size of injection air flow inlet 1 and the inner rectangular cavity of injector
Identical, the other end opening of injector is equipped with the mixing diffusion pipeline 5 docked with injector internal cavities, the top of injector
Side wall is equipped with the air collecting chamber 3 of a rectangle, and the internal cavities of injector are equipped with two pieces of vertical supporting plates 4, and the inside of supporting plate 4 is set
There is vertical jet pipe air guide chamber 7, the both ends of supporting plate 4 are connected with the inner sidewall of injector, open on the side wall above air collecting chamber 3
Equipped with an injection air flow inlet 2, pass through 6 connection of jet pipe air guide chamber air inlet, injection between air collecting chamber 3 and jet pipe air guide chamber 7
Air flow inlet 2 faces jet pipe air guide chamber air inlet 6, and supporting plate 4, which is met, is equipped with front end diversion section 9 by 1 direction of injection air flow inlet, preceding
End diversion section 9, which is met, is arranged conical by its shape at an acute angle by injection airflow direction, and injector internal cavities are divided into parallel by supporting plate 4
Equidistantly by injection air-flow subchannel 8, the direction of supporting plate 4 towards mixing diffusion pipeline 5 is equipped with edge and is gradually become by injection airflow direction
Big Laval nozzle 10, entrance and the jet pipe air guide chamber 7 of Laval nozzle 10 are conducted, the outlet of Laval nozzle 10 and mixed
It closes diffusion pipeline 5 to be conducted, the structure of front end diversion section 9, two-dimentional Laval nozzle 10 and jet pipe air guide chamber 7 is in integrated design
Supporting plate 4 is constituted, mixing diffusion pipeline 5 is the first cross-section section 11 of rectangle and area equation including cross section and cross section is square
The first rectangle expansion segment 12 that shape and area edge are become larger by injection airflow direction, one end of the first cross-section section 11 and injection
Device is connected, and the other end of the first cross-section section 11 is connected with the lesser one end of 12 cross-sectional area of the first rectangle expansion segment
It connects；The number N of supporting plate 4 is set as 2, is set by 1 width D of injection air flow inlet as 280mm, the length of the first cross-section section 11 is
By 8 times of 1 width of injection air flow inlet, i.e., the length of the first cross-section section 11 is 2240mm, 11 both ends of the first cross-section section
Area of section ratio is 3.
A kind of application of more supporting plate injectors of two dimensional configurations, when injector performance pursues small pressure ratio, big mass ratio of induced-to-inducing air
When, use more supporting plate injectors and the square equal cross-section mixing diffusion pipeline combined application of two dimensional configurations；Injection air-flow is from injection
Air flow inlet 2 enters inside air collecting chamber 3, is divided into multiply uniform air flow by jet pipe air guide chamber air inlet 6 and respectively enters each supporting plate 4
It in internal jet pipe air guide chamber 7, and is delivered in mixing diffusion pipeline 5 by two-dimentional Laval nozzle 10, at the same time, by injection
Air-flow enters from by injection air flow inlet 1, by the guide functions of front end diversion section 9, forms multiply uniformly by injection air-flow
It enters each by injection air-flow subchannel 8, is passed through by injection air-flow and mixing diffuser pipe is entered by injection air-flow subchannel 8
In road 5, injection air-flow is mixed with by injection air-flow mixing in diffusion pipeline 5, by the injection air-flow of high stagnation pressure to low stagnation pressure
It is pressurized by injection air-flow, uniform in mixing 5 flow field structure of diffusion pipeline, shock loss is small, and operating condition is low, function admirable.
Embodiment 2
As shown in the picture, the invention proposes a kind of more supporting plate injectors of two dimensional configurations, the exterior configuration of injector is
Rectangle, the inside of injector are equipped with the rectangular enclosure of both ends open, and one end of injector is equipped with docks with injector internal cavities
By injection air flow inlet 1, the shape size of injection air flow inlet 2 and the size of inner rectangular cavity of injector are identical, draw
The other end of emitter is equipped with the mixing diffusion pipeline 5 docked with injector internal cavities, and mixing diffusion pipeline 5 is docked with injector
The shape size of one end and the size of inner rectangular cavity of injector are identical, set respectively on the upper side wall and lower wall of injector
There is an air collecting chamber 3, the internal cavities of injector are equipped with four pieces of supporting plates 4, and the inside of supporting plate 4 is equipped with vertical jet pipe air guide chamber 7,
3 upper side wall of air collecting chamber above injector is opened up there are four injection air flow inlet 2, and 3 lower wall of air collecting chamber below injector is opened
If there are four injection air flow inlets 2, pass through 6 connection of jet pipe air guide chamber air inlet, injection between air collecting chamber 3 and jet pipe air guide chamber 7
Air flow inlet 2 faces jet pipe air guide chamber air inlet 6, and supporting plate 4, which is met, is equipped with front end diversion section 9 by 1 direction of injection air flow inlet, preceding
End diversion section 9, which is met, is arranged to obtuse angle conical by its shape by injection airflow direction, and injector internal cavities are divided into parallel by supporting plate 4
Equidistantly by injection air-flow subchannel 8, the direction of supporting plate 4 towards mixing diffusion pipeline 5 is equipped with edge and is gradually become by injection airflow direction
The entrance of big Laval nozzle 10, Laval nozzle 10 is connected with jet pipe air guide chamber 7, the outlet of Laval nozzle 10 with mix
Diffusion pipeline 5 is connected, and the structure of front end diversion section 9, two-dimentional Laval nozzle 10 and jet pipe air guide chamber 7 is in integrated design structure
At supporting plate 4, mixing diffusion pipeline 5 includes the second cross-section section 13, bilateral contraction section 14, rectangle venturi 15 and the expansion of the second rectangle
Section 16, one end of the second cross-section section 13 is connected to each other with injector, and the cross section of the second cross-section section 13 is rectangle and area phase
Cross-sectional area Deng, bilateral contraction section 14 by injection airflow direction along being gradually reduced, 13 other end of the second cross-section section and double
The biggish one end of 14 cross-sectional area of side contraction section is connected, the biggish one end of bilateral 14 cross-sectional area of contraction section and rectangle larynx
Road 15 is connected, and the cross section of rectangle venturi 15 is rectangle and area equation, and the cross section of the second rectangle expansion segment 16 is rectangle
And cross-sectional area, along being become larger by injection airflow direction, the other end of rectangle venturi 15 and the second rectangle expansion segment 16 are transversal
Area lesser one end in face is connected；The number N of supporting plate 4 is set as 4, is set by the width D of injection air flow inlet 1 as 280mm,
The length of second cross-section section 13 is by 4 times of the width D of injection air flow inlet 1, and the length of the second cross-section section 13 is
560mm, the contraction half-angle value of bilateral contraction section 14 are 5 °, bilateral 14 exit area of contraction section and entrance section area it
The value of ratio is 0.6, and the length of rectangle venturi 15 is 8 times of 15 hydraulic diameter of rectangle venturi, the expansion of the second rectangle expansion segment 16
Opening half-angle value is 4 °, and the value of 16 exit area of the second rectangle expansion segment and entrance section area ratio is 3.
A kind of application of more supporting plate injectors of two dimensional configurations, when injector performance pursues big pressure ratio, small mass ratio of induced-to-inducing air
When, use more supporting plate injectors and the rectangle second throat mixing diffusion pipeline combined application of two dimensional configurations；Injection air-flow is from drawing
Inflow entrance 2 of emanating respectively enters inside two air collecting chambers 3, and injection air-flow is divided by the jet pipe air guide chamber air inlet 6 at 4 both ends of supporting plate
It is had respectively entered in the jet pipe air guide chamber 7 inside each supporting plate 4 for the uniform air-flow of multiply, and defeated by two-dimentional Laval nozzle 10
It send into mixing diffusion pipeline 5, is entered at the same time by injection air-flow from by injection air flow inlet 1, by front end diversion section 9
Guide functions form multiply and are uniformly entered by injection air-flow each by injection air-flow subchannel 8, passed through by injection air-flow
It is entered in mixing diffusion pipeline 5 by injection air-flow subchannel 8, injection air-flow is mixing in diffusion pipeline 5 with by injection air-flow
Mixing, by injection air-flow being pressurized by injection air-flow to low pressure of high pressure, the uniform injection air-flow of multiply with by injection air-flow it
Between contact area it is big, the effect for mixing enhancing is good, mixing 5 flow field structure of diffusion pipeline it is uniform, shock loss is small, injector
Operating condition is low, function admirable.
Design method in 2 according to an embodiment of the present invention, devises the four supporting plate injectors and rectangle of a kind of two dimensional configurations
The mechanical device of second throat mixing diffusion pipeline combined application, this device have passed through verification experimental verification, obtain injector performance
The test result of characteristic is guaranteeing big pressure ratio as shown in fig. 6, this device aspirates minimum pressure that blind chamber obtains down to 1.6kPa
While have higher mass ratio of induced-to-inducing air, superior performance again.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of more supporting plate injectors of two dimensional configurations, which is characterized in that the inside of the injector is equipped with the sky of both ends open
Chamber, the place open at one end of the injector be equipped be connected with injector internal cavities by injection air flow inlet, the injector
Other end opening be connected with mixing diffusion pipeline, it is described mixing diffusion pipeline pipeline inside and injector internal cavities phase
Conducting, the side wall of the injector are equipped with more than one air collecting chamber, are equipped with one piece or more in the cavity of the injector
Supporting plate is equipped between the supporting plate and supporting plate and between supporting plate and injector side wall by injection air-flow subchannel, described to be drawn
Emanate flow the both ends of subchannel respectively with by injection air flow inlet and mix diffusion pipeline and be conducted, the inside setting of the supporting plate
There is jet pipe air guide chamber, more than one injection air flow inlet, the air collecting chamber and spray are offered on the lateral wall of the air collecting chamber
It is connected between pipe air guide chamber by jet pipe air guide chamber air inlet, the supporting plate meets to be equipped with by injection airflow direction to be drawn for shunting
It emanates the front end diversion section of stream, the inside of the supporting plate is along being provided with Laval nozzle, the Lavalle by injection airflow direction
The entrance of jet pipe is connected to jet pipe air guide chamber, and the outlet of the Laval nozzle is connected to mixing diffusion pipeline.
2. a kind of more supporting plate injectors of two dimensional configurations according to claim 1, it is characterised in that: the side of the injector
Wall is equipped with an air collecting chamber, and the lateral wall of the air collecting chamber is equipped with more than one injection air flow inlet.
3. a kind of more supporting plate injectors of two dimensional configurations according to claim 1, it is characterised in that: the side of the injector
It is set on wall there are two air collecting chamber, two air collecting chambers are separately positioned on the corresponding injector side wall of branch board ends, the collection
The lateral wall of air cavity is equipped with more than one injection air flow inlet.
4. a kind of more supporting plate injectors of two dimensional configurations according to claim 1-3, it is characterised in that: the branch
Plate is evenly spaced in injector internal cavities, and the supporting plate is by front end diversion section, jet pipe air guide chamber, Laval nozzle integration
Design, the appearance profile of the supporting plate are streamlined.
5. a kind of more supporting plate injectors of two dimensional configurations according to claim 4, it is characterised in that: the front end diversion section
Meet and taper at an acute angle or obtuse angle taper be arranged by injection airflow direction, the jet pipe air guide chamber by jet pipe air guide chamber air inlet with
Air collecting chamber connection, the Laval nozzle are the supersonic speed Laval nozzle of two dimensional configurations.
6. a kind of more supporting plate injectors of two dimensional configurations according to claim 5, it is characterised in that: the mixing diffuser pipe
Road is square equal cross-section mixing diffusion pipeline, and the mixing diffusion pipeline includes first etc. that cross section is rectangle and area equation
Section and cross section are rectangle and area along the first rectangle expansion segment become larger by injection airflow direction, described first etc.
One end of section is connected with injector, the other end of the first cross-section section and the first rectangle expansion segment cross-sectional area compared with
Small one end is connected.
7. a kind of more supporting plate injectors of two dimensional configurations according to claim 6, it is characterised in that: first cross-section
The length of section and the number N of supporting plate are inversely proportional, and the length of the first cross-section section is by the 4-10 of injection air flow inlet width D
Times, i.e., the length of the first cross-section section is 4-10D, the value range of the area ratio of the first rectangle expansion segment both ends cross section
It is 1.5~4.
8. a kind of more supporting plate injectors of two dimensional configurations according to claim 5, it is characterised in that: the mixing diffuser pipe
Road is rectangle second throat mixing diffusion pipeline, and the mixing diffusion pipeline includes the second cross-section section, bilateral contraction section, rectangle
Venturi and the second rectangle expansion segment, one end of the second cross-section section are connected to each other with injector, the second cross-section section
Cross section is rectangle and area equation, and the cross-sectional area edge of the bilateral contraction section is gradually reduced by injection airflow direction, institute
It states the second cross-section section other end to be connected with bilateral biggish one end of contraction section cross-sectional area, the bilateral contraction section is transversal
Area biggish one end in face is connected with rectangle venturi, and the cross section of the rectangle venturi is rectangle and area equation, and described the
The cross section of two rectangle expansion segments is rectangle and cross-sectional area edge is become larger by injection airflow direction, the rectangle venturi
The other end is connected with second lesser one end of rectangle expansion segment cross-sectional area.
9. a kind of more supporting plate injectors of two dimensional configurations according to claim 8, it is characterised in that: second cross-section
Segment length is by 0~5 times of injection air flow inlet width D, the value range of the contraction half-angle of the bilateral contraction section is 1~
10 °, the value range of the bilateral contraction section exit area and entrance section area ratio is 0.3~0.9, the rectangle
Throat length is 4~10 times of rectangular channel hydraulic diameter, and the value range of the expansion half-angle of the second rectangle expansion segment is 2
~8 °, the value range of the second rectangle expansion segment both ends cross-sectional area ratio is 1.5~5.
10. a kind of application of more supporting plate injectors of two dimensional configurations, it is characterised in that: injection air-flow enters from injection air flow inlet
Inside air collecting chamber, the jet pipe air guide for entering branch intralamellar part by jet pipe air guide chamber air inlet is intracavitary, and from Laval nozzle to
The injection air-flow for mixing the high stagnation pressure of conveying in diffusion pipeline, is entered by injection air-flow from by injection air flow inlet at the same time, passes through
It crosses the guide functions of front end diversion section, forms multiply and uniformly entered each by injection air-flow subchannel, quilt by injection air-flow
Injection air-flow passes through to be entered in mixing diffusion pipeline by injection air-flow subchannel, and injection air-flow is mixing expansion with by injection air-flow
Mixing in pressure pipeline, by injection air-flow being pressurized by injection air-flow to low stagnation pressure of high stagnation pressure；When injector performance pursues small increasing
When pressure ratio, big mass ratio of induced-to-inducing air, expanded using more supporting plate injectors of two dimensional configurations with including the first cross-section section and the first rectangle
The square equal cross-section mixing diffusion pipeline combined application of section；When injector performance pursues big pressure ratio, small mass ratio of induced-to-inducing air, use
More supporting plate injectors of two dimensional configurations with include the second cross-section section, bilateral contraction section, rectangle venturi and the second rectangle expansion segment
Rectangle second throat mixing diffusion pipeline combined application.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810573814.2A CN108518366B (en) | 2018-06-06 | 2018-06-06 | Two-dimensional-configuration multi-support-plate ejector and application |
Applications Claiming Priority (1)
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| CN110220196B (en) * | 2019-05-16 | 2021-07-02 | 宁波方太厨具有限公司 | Ejector pipe and cooker ejector comprising same |
| CN111322278B (en) * | 2020-03-26 | 2022-04-12 | 中国航天空气动力技术研究院 | Supersonic air ejector |
| CN113957390B (en) * | 2020-07-21 | 2024-03-08 | 宝山钢铁股份有限公司 | Vacuum coating device with air cushion buffer cavity |
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