CN107144664B - Drop evaporation and fire test device based on dielectric barrier discharge - Google Patents
Drop evaporation and fire test device based on dielectric barrier discharge Download PDFInfo
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- CN107144664B CN107144664B CN201710591749.1A CN201710591749A CN107144664B CN 107144664 B CN107144664 B CN 107144664B CN 201710591749 A CN201710591749 A CN 201710591749A CN 107144664 B CN107144664 B CN 107144664B
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
Abstract
The invention discloses a kind of, and the drop based on dielectric barrier discharge evaporates and fire test device, including experimental cabin, high voltage power supply, drop ejector filler, three L shape metallic rods, metal net shaped cylinder, two metal bars, high-pressure metal web plate and low pressure metal plate.The bar in-core of drop hanging rod is equipped with wire, periphery cladding quartz or ceramics in drop ejector filler；One bottom end of L shape metallic rod is connect with metal net shaped cylinder；Two bottom end of L shape metallic rod and three bottom end of L shape metallic rod can be detachably connected with metal bar, high-pressure metal web plate or low pressure metal plate.By changing the mounting means of L shape metallic rod and the connection type of high voltage power supply, three kinds of electrode arrangement modes are able to achieve, respectively coaxial electrode arrangement, parallel columns tip electrode arrangement is arranged with parallel screen electrode.The present invention can improve liquid propellant, and especially liquid hydrocarbonaceous fuel igniting is slow, igniting is difficult to and the status of flame instability, realize the active control to the evaporation of liquid propellant working medium, ignition process.
Description
Technical field
The present invention relates to plasmaassisted field of combustion technology, especially a kind of drop based on dielectric barrier discharge steams
Hair and fire test device.
Background technique
Propellant is the energy source of means of transport power device, in common all kinds of propellants, liquid propellant because
Big compared with gas density, the fuel or oxidant that the storage tank of finite volume is carried are more, and compared with solid propellant,
The advantages such as igniting, easily controllable can be repeated several times by being had using liquid propellant, so that using gasoline and kerosene as the liquid of representative
Propellant has obtained most commonly used application on automobile, ship, aircraft, rocket.However fluid combustion is unlike gas
Fuel, which simply mixes and lights a fire, realizes burning, but is just burnt by a series of subprocess.It specifically includes: atomization,
Evaporation, mixing, burning, speed, the abundant degree etc. that these subprocess carry out all directly or indirectly affect entire ignition process,
And then affect the starting performance of engine.Whether automobile engine, traditional aero-engine or rocket engine,
In scramjet engine, realize that quick, efficient, stable igniting all seems very crucial, but under actual condition, liquid
The ignition process of fuel often deviates from ideal situation, gently then causes firing delay too long, sends out the air suction type with high speed incoming flow
Motivation is difficult to receive, heavy then directly result in loss of ignition, therefore slow present in liquid propellant urgently to be resolved evaporation and kindling
With instability problem.
It is existing research shows that by dielectric barrier discharge generate plasma have thermodynamics nonequilibrium behavior, live
Change that effect is strong, ionizing efficiency is high, and the electrode of the discharge mode can long-play, entire electrode assembly without motion Machinery Ministry
Part, response rapidly, show brilliant performance in flowing and Combustion System field.However current most electric discharge etc. from
Daughter igniting, auxiliary combustion equipment mostly use more mature arc discharge mode, i.e. plasma all only for gaseous propellant
Torch, this kind of sparking mode can generate the plasma of extreme high-temperature, and electric discharge device needs additional water cooling, imitate to the ionization of fuel
Under rate is also relatively low, energy consumption is very high.
Summary of the invention
In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide one kind to be based on dielectric impedance
Drop evaporation and the fire test device of electric discharge, should be evaporated based on the drop of dielectric barrier discharge can improve with fire test device
The igniting of liquid propellant, especially liquid hydrocarbonaceous fuel is slow, igniting is difficult to and the status of flame instability.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of drop evaporation and fire test device, including experimental cabin, high voltage power supply, drop based on dielectric barrier discharge
Ejector filler, three L shape metallic rods, metal net shaped cylinder, two metal bars, high-pressure metal web plate and low pressure metal plate.
Experimental cabin is closed cabin, and drop ejector filler mounting hole and two electrode installations are provided on the top cover of experimental cabin
Hole；Two electrode mounting holes are symmetricly set on the two sides of drop ejector filler mounting hole.
High voltage power supply includes high-voltage output end and ground terminal.
Drop ejector filler includes drop ejector filler ontology and drop hanging rod；Drop ejector filler ontology is mounted on drop ejector filler
On mounting hole, drop hanging rod is protruded into experimental cabin, and liquid hanging rod includes drop channel, and the bar in-core positioned at drop channel periphery is set
It is equipped with wire；The periphery of drop hanging rod is coated with quartz or ceramics, and the bottom end of drop hanging rod hangs dropping liquid.
Three L shape metallic rods are respectively L shape metallic rod one, L shape metallic rod two and L shape metallic rod three.
The top of every L shape metallic rod is provided with support joint, and each support joint can be removable with electrode mounting hole
Unload connection.
The periphery of L shape metallic rod one is coated with insulating coating, the bottom end of L shape metallic rod one and the fixed company of metal net shaped cylinder
It connects.
Two metal bars are respectively low pressure metal stick and high-pressure metal stick, wherein the periphery of at least one metal bar coats
There are quartz or ceramics.
The side of low pressure metal plate is coated with quartz or glass；High-pressure metal web plate includes stainless steel plate and is arranged stainless
The copper mesh of steel plate side.
The bottom end of L shape metallic rod two and the bottom end of L shape metallic rod three can be with metal bar, high-pressure metal web plate or low pressure gold
Belong to plate to be detachably connected.
It is connected with the support joint or drop ejector filler ontology on the L shape metallic rod top of low pressure metal stick or low pressure metal plate
It can be connected with the ground terminal of high voltage power supply, form ground electrode.
It is connected with the support joint or L shape metallic rod one on the L shape metallic rod top of high-pressure metal stick or high-pressure metal web plate
The support joint on top can be connected with the high-voltage output end of high voltage power supply, form high-field electrode.
By changing the mounting means of L shape metallic rod and the connection type of high voltage power supply, it is able to achieve three kinds of electrode arrangements
Mode is respectively as follows: coaxial electrode arrangement, parallel columns tip electrode arrangement is arranged with parallel screen electrode.
When coaxial electrode is arranged, the support joint on one top of L shape metallic rod is installed therein on an electrode mounting hole, and
The metal net shaped cylinder being connected with one bottom end of L shape metallic rod is set to be located at the periphery of dropping liquid；The high-voltage output end and L of high voltage power supply
The support joint on one top of shape metallic rod is connected, and forms high-field electrode；The ground terminal and drop ejector filler ontology of high voltage power supply
It is connected, forms ground electrode.
The internal diameter of metal net shaped cylinder is 10-20mm.
The insulating coating of one periphery of L shape metallic rod cladding is teflon material.
Parallel columns tip electrode arrange when, low pressure metal stick is detachably connected with two bottom end of L shape metallic rod, high-pressure metal stick and
Three bottom end of L shape metallic rod is detachably connected；The support joint on two top of L shape metallic rod is installed therein an electrode mounting hole
On, the support joint on three top of L shape metallic rod is mounted on another electrode mounting hole, two parallel and symmetrical settings of metal bar
In the periphery of dropping liquid；The high-voltage output end of high voltage power supply is connected with the support joint on three top of L shape metallic rod, forms high-voltage electricity
Pole；The ground terminal of high voltage power supply is connected with the support joint on two top of L shape metallic rod, forms ground electrode.
The periphery of low pressure metal stick and high-pressure metal stick is coated with quartz or ceramics, and quartz or ceramic cladding thickness are equal
For 0.5-1.5mm.
The axial length of every metal bar is 5-15mm, and outer diameter is 3-8mm.
When parallel screen electrode arrangement, low pressure metal plate is detachably connected with two bottom end of L shape metallic rod, high-pressure metal web plate
It is detachably connected with three bottom end of L shape metallic rod；The support joint on two top of L shape metallic rod is installed therein an electrode mounting hole
On, the support joint on three top of L shape metallic rod is mounted on another electrode mounting hole, high-pressure metal web plate and low pressure metal plate
The parallel and symmetrical periphery that dropping liquid is set；The support joint phase of the high-voltage output end of high voltage power supply and three top of L shape metallic rod
Connection forms high-field electrode；The ground terminal of high voltage power supply is connected with the support joint on two top of L shape metallic rod, forms ground electricity
Pole.
The size of low pressure metal plate and high-pressure metal web plate is 10mm × 10mm.
Setting having heaters and pressure regulator in experimental cabin.
The invention has the following beneficial effects:
1. above-mentioned medium blocking discharge electrode structure is simple, and is able to achieve different moulds by adjusting or replacing high voltage power supply
The electric excitation of formula, intensity, energy consumption is lower, realizes the active control to the evaporation of liquid propellant working medium, ignition process.
2. above-mentioned three kinds of medium blocking discharge electrode arrangements take full advantage of common closed drop evaporate,
Fiery experimental cabin design feature, electrode design be replaceable module greatly facilitate electrode itself replacement and three kinds of discharge schemes
Switching, reduce the costs such as processing, used L shape metallic rod had not only played conducting wire effect, but also wrapped up Teflon because it is outer
Material also acts insulation and reinforces the effect of rigidity, and by considering between dielectric barrier discharge excitation area and drop
Mutual alignment relation so that the heat effect and activation to drop are more significant.
3. above-mentioned propellant drop evaporation is adjustable with pressure and temperature in fire test cabin, enable whole device relatively effective
Working environment locating for its liquid propellant under simulation difference engine or same Different Work Condition of Engine.
4. the above-mentioned plasmaassisted propellant drop evaporation based on dielectric barrier discharge, fire test device are more traditional
The evaporation of mechanical, passive type, combustion control device control range is wider, response more rapidly, the mode of action it is more flexible.
5. electric discharge device is much lower compared to arc discharge temperature, general temperature is no more than 400 K, and electric arc then 3000-
10000 K, therefore belong to low temperature plasma, current document shows that conventional ignition application aspect can be higher by 30%-80%, energy in efficiency
Consumption is generally in ten several watts to tens watts.
Detailed description of the invention
Fig. 1 shows a kind of structural representation of drop evaporation and fire test device based on dielectric barrier discharge of the present invention
Figure.
Fig. 2 shows the scheme of installation of electrode under coaxial-type electrode arrangement mode in the present invention.
Fig. 3 shows the structural schematic diagram of high-field electrode under coaxially arranged mode in the present invention.
Fig. 4 shows the scheme of installation of electrode under parallel columns tip electrode arrangement in the present invention.
Fig. 5 shows the structural schematic diagram of high-field electrode under parallel columns tip electrode arrangement in the present invention.
Fig. 6 shows the structural schematic diagram of ground electrode under parallel columns tip electrode arrangement in the present invention.
Fig. 7 shows the scheme of installation of electrode under parallel screen electrode arrangement in the present invention.
Fig. 8 shows the structural schematic diagram of high-field electrode under parallel screen electrode arrangement in the present invention.
Fig. 9 shows the structural schematic diagram of ground electrode under parallel screen electrode arrangement in the present invention.
Wherein have: 1. top covers；11. drop ejector filler mounting hole；12. electrode mounting hole；2. drop ejector filler；21. drop
Ejector filler ontology；22. drop hanging rod；3. experimental cabin；4. observation window；5.L shape metallic rod one；51. support joint；6. metal net shaped
Cylinder；7.L shape metallic rod two；8. low pressure metal stick；9. high-pressure metal stick；10. high-pressure metal web plate；11. low pressure metal plate；
12. rack；13. high voltage power supply；14.L shape metallic rod three.
Specific embodiment
Xia Mianjiehefutuhejuti compare Jia Shishifangshiduibenfamingzuojinyibuxiangxishuoming.
As shown in Figures 1 to 9, a kind of drop evaporation and fire test device based on dielectric barrier discharge, including test
Cabin 3, high voltage power supply 13,2, three L shape metallic rods of drop ejector filler, metal net shaped cylinder 6, two metal bars, high-pressure metal nets
Plate 11 and low pressure metal plate 10.
Experimental cabin is closed cabin, and experimental cabin is preferably positioned on rack 12.
Drop ejector filler mounting hole 11 and two electrode mounting holes 12 are provided on the top cover of experimental cabin；Two electrode installations
Hole is symmetricly set on the two sides of drop ejector filler mounting hole.
Experimental cabin is preferably made of stainless steel, and observation window 4, preferably two parallel sides are provided on the side wall of experimental cabin
One observation window is respectively set on wall, and two observation windows are preferably placed on same axis.Observation window be used for drop Ignition Phenomena into
Row observation.
Observation window is preferably quartz glass observation window.
It is preferably provided with having heaters and pressure regulator in experimental cabin, can be realized the survey of temperature, pressure in test cabin 3
Amount and adjusting.Heater is preferably regenerative resistor heater.
High voltage power supply 13 is high frequency and high voltage power supply or nanosecond pulse high voltage power supply, and high voltage power supply includes high-voltage output end
And ground terminal.
Drop ejector filler includes drop ejector filler ontology 21 and drop hanging rod 22.
Drop ejector filler ontology is mounted on drop ejector filler mounting hole, and drop hanging rod protrudes into experimental cabin, liquid hanging rod
Including drop channel, the bar in-core positioned at drop channel periphery is provided with wire；The periphery of drop hanging rod be coated with quartz or
The bottom end of ceramics, drop hanging rod hangs dropping liquid.
Three L shape metallic rods are respectively L shape metallic rod 1, L shape metallic rod 27 and L shape metallic rod 3 14.
The top of every L shape metallic rod is provided with support joint 51, and each support joint can with electrode mounting hole
Dismantling connection is preferably threadedly coupled.
Preferably wrap up teflon material in the periphery of every L shape metallic rod.
By changing the mounting means of L shape metallic rod and the connection type of high voltage power supply, it is able to achieve three kinds of electrode arrangements
Mode is respectively as follows: coaxial electrode arrangement, parallel columns tip electrode arrangement is arranged with parallel screen electrode.
Electrode arrangement mode one: coaxial electrode arrangement
As shown in Fig. 2, the support joint on one top of L shape metallic rod is installed therein on an electrode mounting hole, and make and L
The metal net shaped cylinder that one bottom end of shape metallic rod is connected is located at the periphery of dropping liquid.
When specific installation, metal net shaped cylinder can first be set in the periphery of dropping liquid, one top of L shape metallic rod is from wherein one
After being pierced by a electrode mounting hole, and the connection that is screwed.Meanwhile plug or support joint can be used in another electrode mounting hole
Sealing.
The high-voltage output end of high voltage power supply is preferably connected by conducting wire with the support joint on one top of L shape metallic rod, shape
At high-field electrode；The ground terminal of high voltage power supply is connected with drop ejector filler ontology, forms ground electrode.
Further, the periphery of above-mentioned L shape metallic rod one is coated with insulating coating, and insulating coating is preferably teflon material.
As shown in Figures 2 and 3, the bottom end of L shape metallic rod one is fixedly connected with metal net shaped cylinder, is preferably welded.Gold
The internal diameter for belonging to mesh cylinder is preferably 10-20mm.
When test, pressure, the temperature to required value in test cabin 3 are adjusted first, is then generated by drop ejector filler 2
Drop simultaneously makes drop hang on 22 end of drop hanging rod.When using coaxial electrode arrangement, high voltage power supply 13 is opened,
Generating body formula dielectric barrier discharge between 2 end of metal net shaped cylinder 6 and drop hanging rod, propellant drop are absorbed by discharge process
Heat, and with cracking, activation, to accelerate its evaporation, ignition process.
The working principle of dielectric barrier discharge in the present invention is described below:
Dielectric barrier discharge relates to a variety of physical and chemical processes during generating nonequilibrium plasma, in high-voltage alternating
Under the driving of power supply or nanosecond pulse power supply, a series of exoelectrical reactions can occur for the region between electrode, by all kinds of particles
The processes such as collision, under the effect of the processes such as Joule heating, the temperature of discharge gas can be risen；And nanosecond pulse power supply
The MOMENTUM TRANSMISSIONs effect such as ion wind can be brought under excitation.
Theoretically entire propellant drop, which assume that, is initially spherical shape, and evaporation process first starts at gas-liquid boundary
Face.When applying electric discharge, electric discharge betides the region between two electrodes.That electric discharge changes first is gas Jie around drop
Matter surrounds gas and is cracked into active particle abundant, entire gas temperature is by a series of physical chemical process above-mentioned
It increases, then surrounds gas and conduct heat to droplet surface, and then promote the evaporation of spherical drop outer layer liquid medium, after evaporation
Propellant is blended with the active particle being ionized rapidly, initial burning after reaching certain condition；The heat discharged after kindling
Amount further promotes the evaporation and burning of remaining drop medium, thus reached the entire propellant drop of quickening evaporate,
The purpose of fire.
When using above-mentioned coaxial electrode arrangement, synchronizing direct is all received the effect of electric discharge by entire droplet surface,
I.e. droplet surface is near uniformly by the effect discharged.
Electrode arrangement mode two: parallel columns tip electrode arrangement
As shown in Figure 4, Figure 5 and Figure 6, low pressure metal stick is detachably connected with two bottom end of L shape metallic rod, and preferably screw thread connects
It connects.High-pressure metal stick is detachably connected with three bottom end of L shape metallic rod, is preferably threadedly coupled.
The support joint on two top of L shape metallic rod is installed therein on an electrode mounting hole, three top of L shape metallic rod
Support joint is mounted on another electrode mounting hole, the parallel and symmetrical periphery that dropping liquid is arranged in of two metal bars namely liquid
Drop is located at the geometric center of two metal bars.
The high-voltage output end of high voltage power supply is connected with the support joint on three top of L shape metallic rod, forms high-field electrode；It is high
The ground terminal of voltage source is connected with the support joint on two top of L shape metallic rod, forms ground electrode.
Two metal bars are respectively low pressure metal stick 8 and high-pressure metal stick 9, wherein are wrapped the periphery of at least one metal bar
Quartz or ceramics are covered with, quartz or ceramic cladding thickness are preferably 0.5-1.5mm.
The axial length of every metal bar is both preferably 5-15mm, and outer diameter is both preferably 3-8mm.
In addition, liquid hanging rod can be unwired general using bar in-core when using parallel columns tip electrode arrangement
Logical drop hanging rod, it is within the scope of the present invention.
When using parallel columns tip electrode arrangement, high voltage power supply 13, the generating surface formula between parallel columns tip electrode are opened
Dielectric barrier discharge, electrode surface barrier layer can choose three kinds of arrangements, i.e. only on high-pressure metal stick 9 or only low pressure metal
On stick 8 and two metal bars coat quartz or ceramics, to have the function that change discharge effect.
When using parallel column cap discharge scheme, happens is that face discharge type, acts directly on spherical drop and puts with this
Level face intersection, direct active area is smaller, but since discharge channel is small, Reduced field strength is high, and ionic activity is big, and temperature rise is more
Obviously.
Electrode arrangement mode three: parallel screen electrode arrangement
As shown in Figure 7, Figure 8 and Figure 9, two bottom end of low pressure metal plate 10 and L shape metallic rod is detachably connected, preferably screw thread
Connection；Three bottom end of high-pressure metal web plate 11 and L shape metallic rod is detachably connected, and is preferably threadedly coupled.
The support joint on two top of L shape metallic rod is installed therein on an electrode mounting hole, three top of L shape metallic rod
Support joint is mounted on another electrode mounting hole.
The side of low pressure metal plate is coated with quartz or glass；High-pressure metal web plate includes stainless steel plate and is arranged stainless
The copper mesh of steel plate side.
The size of low pressure metal plate and high-pressure metal web plate is both preferably 10mm × 10mm.
High-pressure metal web plate and the parallel and symmetrical periphery that dropping liquid is arranged in of low pressure metal plate namely drop are located at high pressure gold
Belong to the geometric center of web plate and low pressure metal plate.Meanwhile it being wrapped on the copper mesh and low pressure metal plate being arranged on high-pressure metal web plate
The quartz or ceramics covered is arranged towards drop side.
The high-voltage output end of high voltage power supply is connected with the support joint on three top of L shape metallic rod, forms high-field electrode；It is high
The ground terminal of voltage source is connected with the support joint on two top of L shape metallic rod, forms ground electrode.
In addition, liquid hanging rod can be unwired general using bar in-core when using parallel net-plate electrode arrangement
Logical drop hanging rod, it is within the scope of the present invention.
When using parallel net-plate electrode arrangement, high voltage power supply 13 is opened, electric discharge occurs and metal mesh 11 and metal
Between plate 10, belong to the electric discharge of body formula.
When using parallel web plate scheme, in addition droplet surface is situated between the two by the active area size discharged,
Partial ionization intensity is greater than coaxial-type scheme, but is less than parallel column cap scheme.
A whole set of experimental rig is other than the above specific feature, due to using modularized design, used L shape metallic rod
Not only conducting wire function had been played, but also has played the role of supporting electrode.In addition, in conjunction with the data that related sensor acquires, it is entire to fill
Set to be adjusted according to drop evaporation, kindling effect by power control system in real time, can also replace the components such as electrode,
Realize more set programmes of work.In addition, the apparatus structure of the application is compact, the degree of modularity is high, disassembly assembly is convenient, by simple
Variation can be achieved with cover discharge schemes, and discharge parameter can be adjusted in a big way, there is stronger strain controlling energy
Power.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail a variety of equivalents can be carried out to technical solution of the present invention within the scope of the technical concept of the present invention, this
A little equivalents all belong to the scope of protection of the present invention.
Claims (9)
1. a kind of drop evaporation and fire test device based on dielectric barrier discharge, it is characterised in that: including experimental cabin, high pressure
Power supply, drop ejector filler, three L shape metallic rods, metal net shaped cylinder, two metal bars, high-pressure metal web plate and low pressure metal
Plate；
Experimental cabin is closed cabin, and drop ejector filler mounting hole and two electrode mounting holes are provided on the top cover of experimental cabin；Two
A electrode mounting hole is symmetricly set on the two sides of drop ejector filler mounting hole；
High voltage power supply includes high-voltage output end and ground terminal；
Drop ejector filler includes drop ejector filler ontology and drop hanging rod；Drop ejector filler ontology is mounted on the installation of drop ejector filler
Kong Shang, drop hanging rod protrude into experimental cabin, and liquid hanging rod includes drop channel, and the bar in-core positioned at drop channel periphery is provided with
Wire；The periphery of drop hanging rod is coated with quartz or ceramics, and the bottom end of drop hanging rod hangs dropping liquid；
Three L shape metallic rods are respectively L shape metallic rod one, L shape metallic rod two and L shape metallic rod three；
The top of every L shape metallic rod is provided with support joint, and each support joint can detachably connect with electrode mounting hole
It connects；
The periphery of L shape metallic rod one is coated with insulating coating, and the bottom end of L shape metallic rod one is fixedly connected with metal net shaped cylinder；
Two metal bars are respectively low pressure metal stick and high-pressure metal stick, wherein the periphery of at least one metal bar is coated with stone
English or ceramics；The side of low pressure metal plate is coated with quartz or glass；High-pressure metal web plate includes stainless steel plate and is arranged not
The copper mesh of rust steel plate side；
The bottom end of L shape metallic rod two and the bottom end of L shape metallic rod three can be with metal bar, high-pressure metal web plate or low pressure metal plates
It is detachably connected；
Be connected with the L shape metallic rod top of low pressure metal stick or low pressure metal plate support joint or drop this physical efficiency of ejector filler with
The ground terminal of high voltage power supply is connected, and forms ground electrode；
It is connected with one top of support joint or L shape metallic rod on the L shape metallic rod top of high-pressure metal stick or high-pressure metal web plate
Support joint can be connected with the high-voltage output end of high voltage power supply, formed high-field electrode；
By the mounting means of change L shape metallic rod and the connection type of high voltage power supply, three kinds of electrode arrangement modes are able to achieve,
It is respectively as follows: coaxial electrode arrangement, parallel columns tip electrode arrangement is arranged with parallel screen electrode；
Coaxial electrode arrange when, the support joint on one top of L shape metallic rod is installed therein on an electrode mounting hole, and make with
The metal net shaped cylinder that one bottom end of L shape metallic rod is connected is located at the periphery of dropping liquid；High-voltage output end and L the shape gold of high voltage power supply
The support joint for belonging to one top of bar is connected, and forms high-field electrode；The ground terminal of high voltage power supply is connected with drop ejector filler ontology
It connects, forms ground electrode.
2. the drop evaporation and fire test device according to claim 1 based on dielectric barrier discharge, it is characterised in that:
The internal diameter of metal net shaped cylinder is 10-20mm.
3. the drop evaporation and fire test device according to claim 1 based on dielectric barrier discharge, it is characterised in that:
The insulating coating of one periphery of L shape metallic rod cladding is teflon material.
4. the drop evaporation and fire test device according to claim 1 based on dielectric barrier discharge, it is characterised in that:
When parallel columns tip electrode is arranged, low pressure metal stick is detachably connected with two bottom end of L shape metallic rod, high-pressure metal stick and L shape metal
Three bottom end of bar is detachably connected；The support joint on two top of L shape metallic rod is installed therein on an electrode mounting hole, L shape gold
The support joint for belonging to three top of bar is mounted on another electrode mounting hole, and two metal bars are parallel and symmetrical to be arranged in dropping liquid
Periphery；The high-voltage output end of high voltage power supply is connected with the support joint on three top of L shape metallic rod, forms high-field electrode；High pressure
The ground terminal of power supply is connected with the support joint on two top of L shape metallic rod, forms ground electrode.
5. the drop evaporation and fire test device, feature according to claim 1 or 4 based on dielectric barrier discharge exists
In: the periphery of low pressure metal stick and high-pressure metal stick is coated with quartz or ceramics, and quartz or ceramic cladding thickness are
0.5-1.5mm。
6. the drop evaporation and fire test device, feature according to claim 1 or 4 based on dielectric barrier discharge exists
In: the axial length of every metal bar is 5-15mm, and outer diameter is 3-8mm.
7. the drop evaporation and fire test device according to claim 1 based on dielectric barrier discharge, it is characterised in that:
When parallel screen electrode arrangement, low pressure metal plate is detachably connected with two bottom end of L shape metallic rod, high-pressure metal web plate and L shape gold
Belong to three bottom end of bar to be detachably connected；The support joint on two top of L shape metallic rod is installed therein on an electrode mounting hole, L shape
The support joint on three top of metallic rod is mounted on another electrode mounting hole, high-pressure metal web plate it is parallel with low pressure metal plate and
It is symmetricly set on the periphery of dropping liquid；The high-voltage output end of high voltage power supply is connected with the support joint on three top of L shape metallic rod, shape
At high-field electrode；The ground terminal of high voltage power supply is connected with the support joint on two top of L shape metallic rod, forms ground electrode.
8. the drop evaporation and fire test device, feature according to claim 1 or claim 7 based on dielectric barrier discharge exists
In: the size of low pressure metal plate and high-pressure metal web plate is 10mm × 10mm.
9. the drop evaporation and fire test device according to claim 1 based on dielectric barrier discharge, it is characterised in that:
Setting having heaters and pressure regulator in experimental cabin.
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| CN108458877B (en) * | 2018-03-14 | 2019-10-29 | 江苏科技大学 | A kind of suspension drop protective cover automatic separating apparatus and method |
| CN108802268B (en) * | 2018-04-25 | 2021-01-05 | 安徽工业大学 | Fuel droplet ignition temperature measuring device for visualization experiment |
| CN112324588B (en) * | 2020-09-30 | 2021-11-09 | 中国人民解放军战略支援部队航天工程大学 | Injector capable of stably suspending fuel liquid drops in high-pressure environment |
| CN113446129B (en) * | 2021-07-26 | 2022-09-30 | 中国人民解放军战略支援部队航天工程大学 | High-efficiency stable combustion injector of medium-small thrust rocket engine |
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| CN102519917B (en) * | 2011-12-13 | 2014-03-12 | 清华大学 | Dielectric barrier discharge based solid sample denudation method and device thereof |
| CN103308662B (en) * | 2013-06-07 | 2015-07-08 | 北京理工大学 | High-temperature and high-pressure single-drop evaporating and burning device |
| CN103454126B (en) * | 2013-07-20 | 2016-06-08 | 中国科学技术大学 | A kind of adjustable liquid droplet generating means |
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2017
- 2017-07-19 CN CN201710591749.1A patent/CN107144664B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022074A (en) * | 2007-03-14 | 2007-08-22 | 万京林 | Differential feed dielectric barrier discharging low-temperature plasma device |
| CN102519917B (en) * | 2011-12-13 | 2014-03-12 | 清华大学 | Dielectric barrier discharge based solid sample denudation method and device thereof |
| CN103308662B (en) * | 2013-06-07 | 2015-07-08 | 北京理工大学 | High-temperature and high-pressure single-drop evaporating and burning device |
| CN103454126B (en) * | 2013-07-20 | 2016-06-08 | 中国科学技术大学 | A kind of adjustable liquid droplet generating means |
| CN103529078A (en) * | 2013-10-25 | 2014-01-22 | 中国人民解放军装备学院 | Experimental device for evaporating and igniting droplets under high-temperature high-pressure environment and use method thereof |
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