CN105717270B - Gel propellant list drop second-time breakage experimental provision - Google Patents
Gel propellant list drop second-time breakage experimental provision Download PDFInfo
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- CN105717270B CN105717270B CN201610072618.8A CN201610072618A CN105717270B CN 105717270 B CN105717270 B CN 105717270B CN 201610072618 A CN201610072618 A CN 201610072618A CN 105717270 B CN105717270 B CN 105717270B
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- inner cylinder
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels, explosives
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
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Abstract
The invention discloses a kind of gel propellant list drop second-time breakage experimental provision, including mounting system, droplet generator and nozzle device；Mounting system can realize droplet generator freely adjusting in three-dimensional space position, can study influence of the different incidence rates to breakup of drop process, and drop enters the interference that incident flow can reduce jet boundary layer and be crushed to drop deformation with certain speed；Droplet generator is heated by water to the gel in inner cylinder, and the gel propellant mobility after being heated improves, and yield stress diminishes, and is easy to that at syringe needle drop can be condensed into；Nozzle device can realize two kinds of operating modes that air-flow is laminar flow and air-flow is turbulent flow by the dismountable flow spoiler in exit, to study influence of the different stream conditions to breakup of drop process.
Description
Technical field
The invention belongs to gel propellant secondary-atomizing studying technological domain, particularly a kind of gel propellant list drop two
Secondary crushing experiment device.
Background technology
Gel propellant, which has, is readily transported the advantage such as storage, safe efficient, it is considered to be traditional liquid propellant has
Imitate substitute.In order to which gel propellant is preferably applied into space flight and military industry field, its fogging problem be at present there is an urgent need to
One of key technology of solution.The main application fields of gel propellant are rocket and punching engine.For liquid engine,
The quality of liquid propellant atomization is closely related with the efficiency of combustion of engine, and gel propellant motor is also such.
Atomization research, not only can provide foundation for the optimization design of engine chamber, can also predict combustibility.In addition, spray
The initial parameter of mist is parameter necessary to burning Indoor Flow Field and engine working process numerical simulation.Therefore, gel promotes
The atomization research of agent is one of basic link in the work of gel reseach of engine.Secondary-atomizing is atomized most as gel fuel
In the stage afterwards, very big influence will be produced to final atomization, therefore, gel propellant secondary-atomizing process is carried out real
Testing research has very big theory and engineering significance.
The experimental facilities studied typically has two classes according to principle：Shock wave tube method and fluid jet.Shock wave tube method air-flow is held
The continuous time is short, is not suitable for the secondary-atomizing research of gel fuel.Fluid jet is because experiment equipment is simple and convenient, gas flow duration
It is long, it is easy to measurement parameter and is widely adopted.But the jet boundary layer of the method can produce interference to drop.
In addition, gel propellant is non-newtonian fluid, under normality and do not have a mobility.And the premise of drop formation is stream
The mobility of body will get well.It is general to take the mode for applying shearing force to gel propellant to make its thinning, so that it overcomes surrender
Stress and flow.But the equipment that this method needs is more complicated, is not easy to operate.
The content of the invention
It can be easy to produce drop it is an object of the invention to provide one kind, it is simple in construction, it is easy to operate, can be efficiently
Coordinated with optical measuring system, complete the Emergence and Development of drop second-time breakage and the gel propellant list liquid of process record
Drip second-time breakage experimental provision.
The technical solution for realizing the object of the invention is：
A kind of gel propellant list drop second-time breakage experimental provision, including mounting system, droplet generator and jet pipe machine
Structure, wherein, mounting system includes bottom plate, lower carriage, staking and droplet generator support, and lower carriage and bottom plate are in the horizontal direction
On be slidably matched, staking is slidably matched in the horizontal direction with lower carriage, and between its glide direction and lower carriage and bottom plate
Glide direction it is vertical, droplet generator support is slidably matched with staking in the vertical direction, and its glide direction and lower branch
The glide direction between glide direction and staking and lower carriage between frame and bottom plate is vertical；Droplet generator and drop
Generator support is connected, and the axis direction of droplet generator is parallel to the slip side between droplet generator support and staking
To；Nozzle device is fixedly installed on bottom plate 1, and the axis of nozzle device is parallel with bottom plate 1, and nozzle device includes expansion convergence spray
Pipe and flow spoiler, entrance to exit cross-section are then expanded, the transient mode finally shunk, expansion convergence first to keep constant
The port of export of jet pipe is fixedly installed flow spoiler, and flow spoiler includes flow spoiler outer cover and turbulence columns, flow spoiler housing opening section
Outlet with expanding contracting nozzle coordinates, and turbulence columns are fixed in flow spoiler outer cover, and upper symmetrical separation from vertical direction
The opening of flow spoiler outer cover；Droplet generator include upper lid, lower cover, inner cylinder, extrusion piston, syringe needle and inner cylinder capping, it is upper lid with
Lower cover surrounds cavity, and the side wall of upper lid and lower cover is provided with the hole connected with cavity, and inner cylinder is placed in cavity, the perforate of inner cylinder end
And sealing corresponding with the position of opening of lower cover end coordinates, and the correspondence position of two perforates is connected with syringe needle, and inner cylinder capping fixation is set
Put at the upper open-ended place of lid, and, inner cylinder and the opening sealing cooperation of upper lid end spacing to the end of inner cylinder, inner cylinder capping end
The opening in portion and the open communication of inner cylinder end, extrusion piston is arranged in the cavity of inner cylinder, and is slidingly sealed cooperation with inner cylinder,
There is gel propellant in cavity between the end face of extrusion piston and syringe needle.
The present invention compared with prior art, its remarkable advantage：
(1) present invention can realize the upper and lower adjustable of droplet generator using mounting system, so that in Action of Gravity Field
The drop of lower whereabouts has different speed.On the one hand, different fallings speed can be used as research gel secondary-atomizing process
A parameter；On the other hand, the interference in flow field boundary layer can effectively be reduced into the speed in flow field by increasing drop.In addition,
Using mounting system, the present invention can realize the three dimensions adjustability of drop drop-off positions, can be used for studying drop and stream
Influence of the different relative space position in field to breakup of drop process.
(2) present invention makes it have preferable mobility by the way of to gel propellant progress heating water bath, avoids
Using the cumbersome of shear shinning device, so that simple and reliable for structure.In addition, different bath temperatures can promote to gel
The physical property of agent has an impact, and therefore, the present invention can be used for studying influence of the temperature of coagulant liquid drop to shattering process.
(3) turbulence columns of outside nozzle of the present invention are detachable.Turbulence columns are added, obtained air velocity distribution is more turbulent flow
；Turbulence columns are removed, air velocity distribution is approximately Laminar Flow.Then, the present invention can be used for two kinds of operating modes：Air-flow be laminar flow and
Air-flow is turbulent flow.
The present invention is described in further detail below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is the structural representation of inventive gel propellant list drop second-time breakage experimental provision.
Fig. 2 is the structural representation of the slide type rail system of inventive gel propellant list drop second-time breakage experimental provision.
Fig. 3 is the structural representation of inventive gel propellant list drop second-time breakage experimental provision droplet generator.
Fig. 4 is the structural representation of inventive gel propellant list drop second-time breakage experimental provision nozzle device.
Fig. 5 is the structural representation of inventive gel propellant list drop second-time breakage experimental provision flow spoiler.
Embodiment
With reference to Fig. 1~Fig. 5：
A kind of gel propellant list drop second-time breakage experimental provision of the present invention, including mounting system, droplet generator and
Nozzle device, wherein, mounting system includes bottom plate 1, lower carriage 4, staking 6 and droplet generator support 9, lower carriage 4 and bottom
Plate 1 is slidably matched in the horizontal direction, and staking 6 is slidably matched in the horizontal direction with lower carriage 4, and its glide direction is with
Glide direction between support 4 and bottom plate 1 is vertical, and droplet generator support 9 is slidably matched with the in the vertical direction of staking 6,
And the glide direction between glide direction between its glide direction and lower carriage 4 and bottom plate 1 and staking 6 and lower carriage 4
It is vertical；Droplet generator is connected with droplet generator support 9, and the axis direction of droplet generator is parallel to droplet generator branch
Glide direction between frame 9 and staking 6；Nozzle device is fixedly installed on bottom plate 1, and the axis and bottom plate 1 of nozzle device are flat
OK, nozzle device includes expansion contracting nozzle 3 and flow spoiler 15, and entrance to exit cross-section is first to keep constant, is then expanded,
The transient mode finally shunk, the port of export of expansion contracting nozzle 3 are fixedly installed flow spoiler 15, and flow spoiler 15 includes flow spoiler
Outer cover 18 and turbulence columns 19, the outlet of the opening section of flow spoiler outer cover 18 and expansion contracting nozzle 3 coordinate, and turbulence columns 19 are solid
It is scheduled in flow spoiler outer cover 18, and the upper symmetrical opening for separating flow spoiler outer cover 18 from vertical direction；Droplet generator includes upper
Lid 8, lower cover 10, inner cylinder 11, extrusion piston 13, syringe needle 14 and inner cylinder capping 16, upper lid 8 and lower cover 10 surround cavity, the upper He of lid 8
The side wall of lower cover 10 is provided with the hole connected with cavity, and inner cylinder 11 is placed in cavity, perforate and the end of lower cover 10 of the end of inner cylinder 11
Position of opening it is corresponding and sealing coordinates, the correspondence position of two perforates is connected with syringe needle 14, and inner cylinder capping 16 is fixedly installed on
8 open-ended place of lid, and it is spacing to the end of inner cylinder 11, and inner cylinder 11 and the opening sealing of the upper end of lid 8 coordinate, inner cylinder capping 16
The opening of end and the open communication of the end of inner cylinder 11, extrusion piston 13 is arranged in the cavity of inner cylinder 11, and is slided with inner cylinder 11
Dynamic sealing coordinates, and has gel propellant in the cavity between the end face of extrusion piston 13 and syringe needle 14.
The channel cross-section expanded in contracting nozzle 3 is rectangle.
Slip between lower carriage 4 and bottom plate 1, staking 6 and lower carriage 4 and droplet generator support 9 and staking 6
Fit through guide rail and sliding block is realized.
Nozzle device is fixed on bottom plate 1 by base 12.
As shown in figure 1, inventive gel propellant list drop second-time breakage experimental provision mainly includes droplet generator, spray
Pipe mechanism and mounting system.The first guide rail slide block system 2, the second guide rail slide block system are slid through between mounting system inner support
The 5, the 3rd guide rail slide block system 7 of system realizes relative slip.Expand contracting nozzle 3 and Nitrogen source gases, gas are connected by adapter 21
Projected after expanding contracting nozzle 3 with certain speed, form jet.After gel drop is produced by droplet generator under freedom
Fall, entered with certain speed in gas flow jet.Drop deforms and crushed under the Aerodynamic force action of air-flow, completes secondary
Atomization process.
As shown in Fig. 2 mounting system can realize the three-dimensional space position regulation of droplet generator.First guide rail slide block system
The guide rail of system 2 is fixed on bottom plate 1, and sliding block can realize x directions slidably.Shape of chinese word Ji lower carriage 4 is fixed on the first guide rail
On the sliding block of slip bocks system 2, then every part on lower carriage 4 can be driven by sliding block, realize freely transporting for x directions
It is dynamic.The guide rail of second guide rail slide block system 5 is fixed on lower carriage 4, and sliding block can realize the free movement in y directions.Staking 6 is solid
On the sliding block of the second guide rail slide block system 5, slide block movement is followed.The part that can be achieved to be fixed on staking 6 is in x-y
Free movement in plane.The guide rail of 3rd guide rail slide block system 7 is fixed on staking 6, and sliding block can realize oneself on z directions
By sliding.Meanwhile the 3rd guide rail slide block system 7 sliding block by droplet generator support 9 directly with droplet generator fix connect
Connect, then droplet generator just can be in z directions slidably.Entirety can realize droplet generator three-dimensional space position from
By adjusting.
The position of droplet generator is directly related to the position of drop.Z directions freely adjust the height caused residing for drop
Degree produces change, under gravity after free-falling, can enter at different rates among air velocity distribution.Then, Bian Keyan
Study carefully influence of the different incidence rates to breakup of drop process.Meanwhile drop enters incident flow with certain speed can reduce jet
The interference that boundary layer crushes to drop deformation.
As shown in figure 3, the upper end of inner cylinder 11 is shut in inner cylinder capping 16, its upper end is connected with the pipeline of source of the gas.Inner cylinder is built-in
There is extrusion piston 13, gel propellant is under extrusion piston 13.When low-pressure gas through inner cylinder capping 16 enter inner cylinders 11 after,
Extrusion piston 13 is acted on, forces it to move downward.Gel propellant flows out under the extruding of extrusion piston 13 from syringe needle 14.By
Relatively low in pressure, extrusion piston 13 moves slowly, and the flow of gel is smaller, and therefore, at syringe needle 14, gel is in surface tension
Drop can be condensed into first under effect, then peeled off from main body.
For the problem of poor fluidity, the present invention is solved using the method for heated gel under gel propellant normality.
Wrapped up as shown in figure 3, being provided with upper lid 8 and lower cover 10 in the outside of inner cylinder 11, between form cavity.In upper lid 8 and lower cover
10 side is provided with screwed hole, is into and out the passage of water.So just form the structure of heating water bath.Water with certain temperature by
The inlet opening of lower cover 10 enters cavity, and by the apopore outflow cavity of upper lid 8, the water in cavity is carried out to the gel in inner cylinder 11
Heating.Gel propellant mobility after heated improves, and yield stress diminishes, and drop can be condensed at syringe needle 14, rather than
It is in the form of a column outflow.Using such a mode, solve the problems, such as that gel is not easy to form drop.Simultaneously as temperature is to gel physical property
Change has a major impact, and the water temperature for changing water-bath can effectively adjust the temperature of gel propellant.Therefore, the present invention can be with
It is used to study influence of the temperature for gel drop shattering process.
As shown in figure 4, the jet of the present invention is produced by nozzle device, profile such as Fig. 4 of nozzle device, adapter 21 connects
Connect source of the gas pipeline and expansion contracting nozzle 3.The inner passage section of expansion segment 20 for expanding contracting nozzle 3 is rectangle, and height is first not
Become, then become larger.Highly constant section is played a part of steady air flow.The then same expansion segment of the internal passage shape of converging portion 17,
Highly it is gradually reduced.Expansion segment 20 coordinates with converging portion 17, reduces air velocity, while holds air-flow.
As shown in figure 5, flow spoiler 15 is made up of flow spoiler outer cover 18 and turbulence columns 19.Turbulence columns 19 export converging portion 17
Section is divided into two parts, and air-flow flows out from the both sides of turbulence columns 19.Herein, turbulence columns 19 hinder the flowing of air-flow, from
And the flowing near it is caused to occur being vortexed.Therefore, exit flow becomes turbulent flow.Flow spoiler 15 can be dismantled, so that
Of the invention it can must be used to study influence of the different stream conditions to breakup of drop process.
Claims (3)
- A kind of 1. gel propellant list drop second-time breakage experimental provision, it is characterised in that：Including mounting system, droplet generator And nozzle device, wherein, mounting system includes bottom plate (1), lower carriage (4), staking (6) and droplet generator support (9), under Support (4) is slidably matched in the horizontal direction with bottom plate (1), and staking (6) slides in the horizontal direction with lower carriage (4) matches somebody with somebody Close, and the glide direction between its glide direction and lower carriage (4) and bottom plate (1) is vertical, droplet generator support (9) and vertical branch Frame (6) in the vertical direction is slidably matched, and glide direction between its glide direction and lower carriage (4) and bottom plate (1) and Glide direction between staking (6) and lower carriage (4) is vertical；Droplet generator is connected with droplet generator support (9), liquid The axis direction of generator is dripped parallel to the glide direction between droplet generator support (9) and staking (6)；Nozzle device is consolidated Surely it is arranged on bottom plate (1), the axis of nozzle device is parallel with bottom plate (1), and nozzle device includes expansion contracting nozzle (3) and disturbed Device (15) is flowed, entrance to exit cross-section is then expanded, the transient mode finally shunk, expansion convergence spray first to keep constant The port of export of pipe (3) is fixedly installed flow spoiler (15), and flow spoiler (15) includes flow spoiler outer cover (18) and turbulence columns (19), disturbed Flow device outer cover (18) opening section and coordinate with expanding the outlet of contracting nozzle (3), turbulence columns (19) are fixed on outside flow spoiler Cover in (18), and the upper symmetrical opening for separating flow spoiler outer cover (18) from vertical direction；Droplet generator include it is upper lid (8), under (10), inner cylinder (11), extrusion piston (13), syringe needle (14) and inner cylinder capping (16) are covered, upper lid (8) and lower cover (10) surround sky The side wall of chamber, upper lid (8) and lower cover (10) is provided with the hole connected with cavity, and inner cylinder (11) is placed in cavity, inner cylinder (11) end Perforate it is corresponding with the position of opening of lower cover (10) end and sealing coordinates, the correspondence position of two perforates is connected with syringe needle (14), Inner cylinder capping (16) is fixedly installed on lid (8) open-ended place, and spacing to the end of inner cylinder (11), inner cylinder (11) and upper lid (8) the opening sealing of end coordinates, the opening and the open communication of inner cylinder (11) end of inner cylinder capping (16) end, extrusion piston (13) it is arranged in the cavity of inner cylinder (11), and cooperation, the end face of extrusion piston (13) and syringe needle is slidingly sealed with inner cylinder (11) (14) there is gel propellant in the cavity between；Channel cross-section in the expansion contracting nozzle (3) is rectangle.
- 2. gel propellant list drop second-time breakage experimental provision according to claim 1, it is characterised in that：The lower branch Slip between frame (4) and bottom plate (1), staking (6) and lower carriage (4) and droplet generator support (9) and staking (6) Fit through guide rail and sliding block is realized.
- 3. gel propellant list drop second-time breakage experimental provision according to claim 1, it is characterised in that：The jet pipe Mechanism is fixed on bottom plate (1) by base (12).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2015106402154 | 2015-09-30 | ||
| CN201510640215 | 2015-09-30 |
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| Publication Number | Publication Date |
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| CN105717270A CN105717270A (en) | 2016-06-29 |
| CN105717270B true CN105717270B (en) | 2017-11-14 |
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| CN201610072618.8A Expired - Fee Related CN105717270B (en) | 2015-09-30 | 2016-02-02 | Gel propellant list drop second-time breakage experimental provision |
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| CN107941655B (en) * | 2017-11-10 | 2020-02-21 | 西安航天动力试验技术研究所 | Formula and preparation method of gel simulation liquid of rocket engine hydrazine gel propellant |
| CN108257483B (en) * | 2018-01-11 | 2020-06-05 | 安徽工程大学 | Observation glass designed based on molded line equation |
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| JP4867630B2 (en) * | 2006-02-16 | 2012-02-01 | セイコーエプソン株式会社 | Metal powder manufacturing apparatus and metal powder |
| CN101865807A (en) * | 2010-04-15 | 2010-10-20 | 上海梭伦信息科技有限公司 | Apparatus and method for testing solid-liquid dynamic and static contact angles by actual liquid droplet method |
| CN104237109B (en) * | 2014-07-02 | 2017-04-19 | 南京航空航天大学 | Method and device for measuring deformation and breakage process characteristics of single liquid drop in airflow |
| CN104676647A (en) * | 2014-12-15 | 2015-06-03 | 西北工业大学 | Venturi apparatus for strengthening liquid-membrane crushing effect |
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