CN109339988A - A kind of pneumatic type drop generating device and method suitable for high viscosity fluid - Google Patents
A kind of pneumatic type drop generating device and method suitable for high viscosity fluid Download PDFInfo
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- CN109339988A CN109339988A CN201811165263.2A CN201811165263A CN109339988A CN 109339988 A CN109339988 A CN 109339988A CN 201811165263 A CN201811165263 A CN 201811165263A CN 109339988 A CN109339988 A CN 109339988A
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- drop
- generating device
- pneumatic type
- high viscosity
- viscosity fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M29/00—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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Abstract
The invention discloses a kind of pneumatic type drop generating devices and method suitable for high viscosity fluid.Drop generating device is made of Mini compressed pump, low pressure gauge, pipeline, micro-vibration piece, end cap, drop cavity, drop outlets, shut-off valve, single trigger switch, solenoid valve, rectangular cavities and round nozzle.The initial disturbance of jet stream is increased by micro-vibration piece, the unstability of jet boundary enhances, jet stream is easier to be broken into droplet, to widen the viscosity use scope (100mPas < μ < 1000mPas) of traditional, pneumatic formula drop generating device；The feeder that traditional, pneumatic formula droplet generator is simplified by using components such as Mini compressed pump, low pressure gauge, shut-off valves, reduces laboratory operating procedures, improves the operability of experiment and makes cost more cheap；Additionally due to Mini compressed is pumped instead of high pressure gas cylinder, so that the safety entirely tested has obtained great promotion.
Description
The present invention relates to the fuel-oil atmozation fields in high performance aircraft propulsion system, specially a kind of to be suitable for high viscosity
The pneumatic type drop generating device and method of fluid.
Background technique
High performance aircraft is the research emphasis of current military power of the world, is developed to national military strength and synthesis
The promotion of national power suffers from great strategic significance.In addition, basic research involved in development process would be possible to push new one
The technological revolution of wheel.And with the promotion of flying speed, demand of the high performance aircraft to high-performance power device also will sharply
Increase.
Combustion chamber plays important angle as the component for discharging fuel oil chemical energy in power device in propulsion system
Color, be in the weight in entire dynamical system research process among.And due at present about combustion process under high speed inlet flow conditions
Basic research is opposite to be lacked, so that combustion chamber still faces huge difficult problem in the design phase.Fuel oil mainly experience spray in the combustion chamber
It penetrates, be atomized, evaporating, combustion process, fuel oil will rapidly undergo deformation under the action of air-flow after nozzle ejection, be crushed
Journey, which will directly affect subsequent evaporation and combustion process, to understand the burning of fuel oil in the combustion chamber in detail
Situation, it is necessary to the broken research of deformation of the development fuel oil under action of high-speed airflow first.
It is limited to immature, the broken research of existing drop deformation of experiment condition and associated fluid theory of mechanics system
Mostly using low viscosity fluids such as water silicon oil as research object, about grinding for high viscosity fluid (μ > 100mPas) deformation shattering process
Study carefully relatively fewer；And following high-performance combustion chamber is during the work time, is likely to make from low viscosity gasoline to high viscosity heavy oil
It releases energy for fuel medium, therefore needs to carry out the broken research of related variation of high viscosity fluid.
The research for carrying out high viscosity drop deformation shattering process is related to the generation of drop, and existing pneumatic type drop occurs
Device is primarily adapted for use in low viscosity fluid (μ < 100mPas)；When fluid viscosity increases, the viscous force of fluid be increased dramatically,
Jet stream is difficult to occur to be crushed under the action of surface tension and aerodynamic force, and pneumatic type drop generating device traditional at this time will no longer
It is applicable in.In addition, the feeder of traditional pneumatic type droplet generator is mostly by high pressure gas cylinder, high-precision dropping valve and pulse generation
Device composition, building block is more, structure is relative complex, operating process is relatively complicated and expensive, this is all significantly limited
The application and popularization of pneumatic type droplet generator.
Just because of many disadvantages existing for current pneumatic type droplet generator and deficiency (high viscosity fluid be no longer applicable in
And the device is complicated for feeder, it is expensive, it is cumbersome the features such as), it is therefore necessary to develop it is completely new can be suitably used for it is high viscous
Property fluid pneumatic type droplet generator, with meet it is simpler, quick and inexpensively generate drop the needs of.
Summary of the invention
Technical problems to be solved
To overcome existing pneumatic type droplet generator to generate, drop is existing insufficient in the process, and it is suitable that the invention proposes one kind
It is main to increase jet stream circle by the way that addition jet stream initial perturbation is dynamic for the pneumatic type drop generating device and method of high viscosity fluid
Face unstability and simplifies feeder and generate high viscosity fluid (100mPas < μ < 1000mPas) drop.The device
The viscosity scope of application for having widened traditional, pneumatic formula drop generating device, simplifies feeder, greatly improves experiment
Operability and safety and the economic cost for reducing droplet generator, can for high viscosity fluid the broken research of deformation and
Engineer application provides strong support.
Technical solution
The technical solution of the present invention is as follows:
A kind of pneumatic type drop generating device suitable for high viscosity fluid, it is characterised in that: pumped by Mini compressed,
Low pressure gauge, pipeline, micro-vibration piece, end cap, drop cavity, drop outlets, shut-off valve, single trigger switch, solenoid valve,
Rectangular cavities and round nozzle composition.Feeder is mainly by Mini compressed pump, low pressure gauge, pipeline and cut-off valve group
At mainly precisely to provide compared with low-pressure gas；It is tested by the open and-shut mode control of single trigger switch adjusting solenoid valve
Starting；It include drop cavity and drop outlets inside rectangular cavities；End cap and nozzle are held by being threadably mounted at drop respectively
Chamber upper and lower surface；Micro-vibration piece is pasted onto rectangular cavities two sides by glue, while providing micro-disturbance for initial jets
Reduce the interference to generated drop to the greatest extent.
A kind of pneumatic type drop generating device suitable for high viscosity fluid, it is characterised in that Mini compressed pump discharge
800L/h, can provide maximum pressure is 100kPa.
A kind of pneumatic type drop generating device suitable for high viscosity fluid, it is characterised in that low pressure gauge range
For 0~0.1000MPa.
A kind of pneumatic type drop generating device suitable for high viscosity fluid, it is characterised in that revolving speed 12000r/
Min, its role is to increase initial interface unstability, so that jet stream is easier to be broken into droplet.
A kind of pneumatic type drop generating device suitable for high viscosity fluid, it is characterised in that: to guarantee enough liquid
It drips cavity volume and reduces influence of the vibration to drop is generated, having a size of long 120mm, high 70mm, wide 70mm, inner droplets
Cavity is having a size of high 50mm, diameter 20mm, tapped through hole of the jet expansion having a size of M10, high 20mm.
A kind of pneumatic type drop generating device suitable for high viscosity fluid, it is characterised in that there is diameter in nozzle center
For the through-hole no more than 0.5mm.
A kind of pneumatic type drop generating device suitable for high viscosity fluid, it is characterised in that have on end cap and pipeline
The interface of connection.
A kind of pneumatic type drop generating device suitable for high viscosity fluid, it is characterised in that single trigger switch institute
The pulse signal duration of offer is 8ms.
A kind of pneumatic type drop generating device suitable for high viscosity fluid, it is characterised in that solenoid valve is that length closes shape
State.
A kind of pneumatic type drop method for generation suitable for high viscosity fluid, it is characterised in that use following steps:
Step 1: certain viscosity (μ < 1000mPas) fluid being injected into drop cavity 6 by end cap 5, injects drop
Volume is about the 1/3 of drop cavity 6, and Mini compressed is successively pumped 1, low pressure gauge 2, shut-off valve 8, electricity by pipeline 3 later
Magnet valve 10 and end cap 5 connect.
Step 2: opening Mini compressed pump 1, while adjusting shut-off valve 8, observation low pressure gauge registration 2 makes in pipeline 3
Stream pressure reaches setting value.
Step 3: opening single trigger switch 9 to 10 input pulse signal of solenoid valve, the interior gas with certain pressure of pipeline 3
Body will from end cap 5 flow into drop cavity 6 in, in drop cavity 6 expand so that extrusion fluid from round nozzle 12 flow out,
Under the action of disturbance, cylinder stream interface unstability be increased dramatically, and jet crushing, can be in droplet generator downstream at droplet
Observe the generation of clusters of droplets.
Step 4: by adjusting shut-off valve 8, changing 3 interior air-flow pressure of pipeline, clusters of droplets spacing can be increased, as spacing L
When being greater than 10 with the ratio between liquid-drop diameter D, it can be considered independent drop one by one.
Beneficial effect
The beneficial effects of the present invention are: introducing jet stream initial disturbance by using micro-vibration piece, jet stream circle is increased
The unstability in face, jet stream are easier to be broken into droplet, to widen the viscosity model of traditional, pneumatic formula drop generating device
It encloses, so that pneumatic type drop generating device can be also applicable at high viscosity range (100mPas < μ < 1000mPas)；By adopting
The feeder of traditional, pneumatic formula droplet generator is simplified with components such as Mini compressed pump, low pressure gauge, shut-off valves, is simplified
Laboratory operating procedures, improve the operability of experiment and make cost more cheap；Additionally due to Mini compressed pump instead of
High pressure gas cylinder, so that the safety entirely tested has obtained great promotion.
Detailed description of the invention
Fig. 1 is a kind of pneumatic type drop generating device schematic diagram suitable for high viscosity fluid
In figure:
1, Mini compressed pumps；2, low pressure gauge；3, pipeline；4, micro-vibration piece；5, end cap；6, drop cavity；7, liquid
Ooze mouth；8, shut-off valve；9, single trigger switch；10, solenoid valve；11, rectangular cavities；12, round nozzle.
Specific embodiment
Below in conjunction with attached drawing, the present invention is described in further detail.
The present invention is a kind of pneumatic type drop generating device suitable for high viscosity fluid, as shown in Figure 1.Comprising: micro-
Type compression pump 1, low pressure gauge 2, pipeline 3, micro-vibration piece 4, end cap 5, drop cavity 6, drop outlets 7, shut-off valve 8, list
Secondary trigger switch 9, solenoid valve 10, rectangular cavities 11, round nozzle 12.
Drop cavity 6 is installed first before generating drop, round nozzle 12 will be connected through a screw thread and is mounted on drop and go out
Mouth 7, end cap 5 is connected through a screw thread and is mounted on above drop cavity 6.Then by pipeline 3 successively by Mini compressed pump 1, it is low
Pressure pressure table 2, shut-off valve 8, solenoid valve 10 and end cap 5 connect, since pipeline 3 is transported under lower pressure in experimentation
Row, experiment apparatus need to check seal performance after connecting, it is ensured that experimental provision is air tight.It is initially disturbed to improve outlet jet
It is dynamic, increase the initial unstability of jet stream to make jet stream be easier to become droplet, is pasted respectively in 11 two sides of rectangular cavities
There is micro-vibration piece 4, the revolving speed of micro-vibration piece 4 is 12000r/min.Gas pressure is driven in pneumatic type drop generating device
Accurate control directly determine the quality for generating drop, to obtain more accurate air pressure, using Mini compressed pump 1 as gas
Source, the flow in steady operation of Mini compressed pump 1 is 800L/h, in combination with low pressure gauge 2 and shut-off valve 8 to realize to pipe
The accurate control of pressure in road 3, when shut-off valve 8 is closed or partially opened, since the change of throat opening area is so that inside pipeline 3
Stream pressure rises, to realize the pressurization to gas in pipeline 3.
After droplet generator component has connected, adjustment shut-off valve 8 makes low pressure gauge 2 reach specified registration, opens
Single trigger switch 9 gives 10 input pulse signal of solenoid valve, and the gas in pipeline 3 with certain pressure will be flowed from end cap 5 at this time
Enter in drop cavity 6, in drop cavity 6 expand so that extrusion fluid from round nozzle 12 flow out, in the effect of disturbance
Under, jet boundary unstability increased dramatically, and easily be broken into droplet.
2 range of low pressure gauge that the present invention uses is 0~0.1000MPa, the letter of pulse provided by single trigger switch 9
Number duration is 8ms, and solenoid valve 10 is long closed state, and the applicable fluid viscosity ranges of institute are 100mPas < μ < 1000mPa
s.The present apparatus has widened the viscosity scope of application of pneumatic type drop generating device by introducing micro-vibration piece 4, while from experiment
Three safety, operability, economy aspects comprehensively consider, and by simplifying laboratory operating procedures, high voltage component are removed, using easy
The components such as 1, low pressure gauge 2 are pumped in the Mini compressed of purchase, seeing more can generate to fast, economical high viscosity drop.
A kind of pneumatic type drop method for generation suitable for high viscosity fluid, it is characterised in that use following steps:
Step 1: certain viscosity (μ < 1000mPas) fluid being injected into drop cavity 6 by end cap 5, injects drop
Volume is about the 1/3 of drop cavity 6, and Mini compressed is successively pumped 1, low pressure gauge 2, shut-off valve 8, electricity by pipeline 3 later
Magnet valve 10 and end cap 5 connect.
Step 2: opening Mini compressed pump 1, while adjusting shut-off valve 8, observation low pressure gauge registration 2 makes in pipeline 3
Stream pressure reaches setting value.
Step 3: opening single trigger switch 9 to 10 input pulse signal of solenoid valve, the interior gas with certain pressure of pipeline 3
Body will from end cap 5 flow into drop cavity 6 in, in drop cavity 6 expand so that extrusion fluid from round nozzle 12 flow out,
Under the action of disturbance, cylinder stream interface unstability be increased dramatically, and jet crushing, can be in droplet generator downstream at droplet
Observe the generation of clusters of droplets.
Step 4: by adjusting shut-off valve 8, changing 3 interior air-flow pressure of pipeline, clusters of droplets spacing can be increased, as spacing L
When being greater than 10 with the ratio between liquid-drop diameter D, it can be considered independent drop one by one.
Claims (10)
1. a kind of pneumatic type drop generating device suitable for high viscosity fluid, it is characterised in that: by Mini compressed pump, low pressure pressure
Power table, pipeline, micro-vibration piece, end cap, drop cavity, drop outlets, shut-off valve, single trigger switch, solenoid valve, rectangular cavity
Body and round nozzle composition；Feeder is mainly made of Mini compressed pump, low pressure gauge, pipeline and shut-off valve；Pass through
The starting of the open and-shut mode control experiment of single trigger switch adjusting solenoid valve；It include drop cavity and liquid inside rectangular cavities
Ooze mouth；End cap and nozzle are respectively by being threadably mounted at drop cavity upper and lower surface；Micro-vibration piece is pasted by glue
Rectangular cavities two sides.
2. a kind of pneumatic type drop generating device suitable for high viscosity fluid according to claim 1, special
Sign is Mini compressed pump discharge 800L/h, and can provide maximum pressure is 100kPa.
3. a kind of pneumatic type drop generating device suitable for high viscosity fluid according to claims 1, it is characterised in that
Low pressure gauge range is 0~0.1000MPa.
4. a kind of pneumatic type drop generating device suitable for high viscosity fluid according to claims 1, it is characterised in that
Revolving speed is 12000r/min.
5. a kind of pneumatic type drop generating device suitable for high viscosity fluid according to claims 1, it is characterised in that:
To guarantee enough drop cavity volumes and reducing influence of the vibration to drop is generated, having a size of long 120mm, high 70mm is wide
70mm, inner droplets cavity is having a size of high 50mm, diameter 20mm, tapped through hole of the jet expansion having a size of M10, high 20mm.
6. a kind of pneumatic type drop generating device suitable for high viscosity fluid according to claims 1, it is characterised in that
It is the through-hole no more than 0.5mm that, which there is diameter in nozzle center,.
7. a kind of pneumatic type drop generating device suitable for high viscosity fluid according to claims 1, it is characterised in that
There is the interface with piping connection on end cap.
8. a kind of pneumatic type drop generating device suitable for high viscosity fluid according to claims 1, it is characterised in that
Pulse signal duration provided by single trigger switch is 8ms.
9. a kind of pneumatic type drop generating device suitable for high viscosity fluid according to claims 1, it is characterised in that
Solenoid valve is long closed state.
10. a kind of pneumatic type drop method for generation suitable for high viscosity fluid, it is characterised in that use following steps:
Step 1: certain viscosity (μ < 1000mPas) fluid being injected into drop cavity by end cap, injection droplet size is about
It is the 1/3 of drop cavity, is later successively connected Mini compressed pump, low pressure gauge, shut-off valve, solenoid valve and end cap by pipeline
It picks up and.
Step 2: opening Mini compressed pump, while adjusting shut-off valve, observation low pressure gauge registration makes pipeline interior air-flow pressure
Reach setting value.
Step 3: opening single trigger switch and give solenoid valve input pulse signal, the gas with certain pressure will be from end in pipeline
Lid flows into drop cavity, expands in drop cavity and then extrusion fluid is flowed out from round nozzle, in the effect of disturbance
Under, cylinder stream interface unstability increased dramatically, and jet crushing can observe clusters of droplets in droplet generator downstream at droplet
Generation.
Step 4: by adjusting shut-off valve, changing pipeline interior air-flow pressure, clusters of droplets spacing can be increased, when spacing L and drop
When the ratio between diameter D is greater than 10, it can be considered independent drop one by one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811165263.2A CN109339988A (en) | 2018-10-08 | 2018-10-08 | A kind of pneumatic type drop generating device and method suitable for high viscosity fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811165263.2A CN109339988A (en) | 2018-10-08 | 2018-10-08 | A kind of pneumatic type drop generating device and method suitable for high viscosity fluid |
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| CN109339988A true CN109339988A (en) | 2019-02-15 |
Family
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| CN201811165263.2A Pending CN109339988A (en) | 2018-10-08 | 2018-10-08 | A kind of pneumatic type drop generating device and method suitable for high viscosity fluid |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109999932A (en) * | 2019-04-20 | 2019-07-12 | 北京工业大学 | The method of microlayer model generation device and its regulation microlayer model size based on pneumatic actuation |
| CN110193994A (en) * | 2019-06-13 | 2019-09-03 | 北京工业大学 | Based on pneumatic and electrohydrodynamics combination drive on-demand microlayer model production method |
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| CN105903599A (en) * | 2016-06-27 | 2016-08-31 | 西北工业大学 | Spraying angle-adjustable high-speed small droplet generation device |
| CN205550212U (en) * | 2016-04-20 | 2016-09-07 | 南通东概念新材料有限公司 | Single seed liquid drop generator suitable for organic solvent |
| CN107070293A (en) * | 2017-05-23 | 2017-08-18 | 中国科学技术大学 | The microlayer model active preparation facilities and method disturbed based on piezoelectricity singing piece |
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2018
- 2018-10-08 CN CN201811165263.2A patent/CN109339988A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012213388A1 (en) * | 2012-07-31 | 2014-02-06 | Robert Bosch Gmbh | Liquid atomization device for use in exhaust gas after-treatment device for internal combustion engine of car, has atomizer atomizing liquid introduced into exhaust gas passage, and piezoelectric actuator for generating ultrasonic vibration |
| CN205550212U (en) * | 2016-04-20 | 2016-09-07 | 南通东概念新材料有限公司 | Single seed liquid drop generator suitable for organic solvent |
| CN105903599A (en) * | 2016-06-27 | 2016-08-31 | 西北工业大学 | Spraying angle-adjustable high-speed small droplet generation device |
| CN107070293A (en) * | 2017-05-23 | 2017-08-18 | 中国科学技术大学 | The microlayer model active preparation facilities and method disturbed based on piezoelectricity singing piece |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109999932A (en) * | 2019-04-20 | 2019-07-12 | 北京工业大学 | The method of microlayer model generation device and its regulation microlayer model size based on pneumatic actuation |
| CN109999932B (en) * | 2019-04-20 | 2021-03-16 | 北京工业大学 | Micro-droplet generating device based on pneumatic driving and method for regulating and controlling size of micro-droplet |
| CN110193994A (en) * | 2019-06-13 | 2019-09-03 | 北京工业大学 | Based on pneumatic and electrohydrodynamics combination drive on-demand microlayer model production method |
| CN110193994B (en) * | 2019-06-13 | 2021-06-25 | 北京工业大学 | On-demand micro-droplet generation method based on pneumatic and electrohydrodynamic hybrid driving |
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Application publication date: 20190215 |