CN110047722A - It is a kind of for handling the charged particle generating device of atmospheric environment - Google Patents
It is a kind of for handling the charged particle generating device of atmospheric environment Download PDFInfo
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- CN110047722A CN110047722A CN201910151524.3A CN201910151524A CN110047722A CN 110047722 A CN110047722 A CN 110047722A CN 201910151524 A CN201910151524 A CN 201910151524A CN 110047722 A CN110047722 A CN 110047722A
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- charged particle
- generating device
- particle
- module
- neutral
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/02—Details
- H01J37/04—Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement, ion-optical arrangement
Abstract
The invention discloses a kind of charged particle generating devices.The charged particle generating device includes: that channel occurs for the charged particle of ground connection；Be set in turn in the charged particle and the entrance in channel occurs to exit: module, ultraviolet source and pin electrode array occur for neutral particle；Module occurs for the neutral particle for generating neutral particle, the ultraviolet source is used for neutral particle initial ionization, the pin electrode array is used to occur in charged particle to generate the electric field for being greater than 15kV/m in channel, to become charged particle to the neutral particle power generation after initial ionization.The charged particle generating device has passed through pin electrode and ultraviolet source, improves the efficiency of charged particle generation.
Description
Technical field
The invention belongs to atmospheric environment fields, send out more particularly, to a kind of charged particle for handling atmospheric environment
Generating apparatus.
Background technique
The existing method handled atmospheric environment of the prior art, these technologies can be used for adjusting rainfall, prevention
With inhibition hail, increase the visibility of foggy weather.For the country of agriculture water shortage, enhancing rainfall is especially heavy
It wants, and for airport roadway and runway, the greasy weather is totally unfavorable.So very crucial to the sedimentation of mist in atmosphere.
Water droplet in typical cloud and mist is relatively small.The size of the radius of most of drop in cloud and mist is respectively distributed to
In the range of 1 μm~10 μm and 1 μm~5 μm.However, cause raindrop to be formed to reinforce droplet collision process, droplet radius
It should be more than 20 μm~25 μm.Water droplet of the radius greater than 25 μm has enough quality, can begin to decline under the effect of gravity,
It can collide and condense with smaller drop during decline.On the other hand, the gravitation between droplet usually will not
Lead to their coalescence, because most of droplet can move together with air-flow.
For reach this purpose handle the method for atmospheric environment first is that ice crystal seeding technique, i.e., man-made land is in supercooled cloud
Ice crystal nucleus and ice crystal is generated with generating in mist.The major defect of ice crystal seeding technique first is that they operability it is limited because
They may can only be used when cloud or mist water droplet temperature are lower than freezing point (0 DEG C) of water.
Also there are the various technologies for much promoting cloud and droplet precipitating in temperature above freezing in the art.These skills
Art is thus to generate big liquid trap based on the particle with absorption aqueous nature is propagated.It is generated by promoting big droplet formation
This technology of raindrop is referred to as hygroscopicity communications.This technology is widely used in enhancing rainfall and mist diffusion.Hygroscopicity
Communications is mainly widely used in weather improvement, it is increased by the big drop in increase (or generation) droplets size distribution
Add the rate of droplet collision.This technology usually travels to soluble particles in cloud layer, and soluble particles play cloud condensation nucleus
Effect.The drop grown on these cloud condensation nucleus is bigger than natural drop, and reaches the required size of collision than other liquid
Drop is earlier.But the hygroscopicity communications of the prior art has the shortcomings that many.Use granular material as propagation for example, working as
When grain, even if their hygroscopicity also usually causes to agglomerate in the case where water content is low.It is bigger than desired value that this will lead to generation
Particle much.Although huge moisture absorption particle may be suitable for forming large-scale liquid trap, to use aircraft by these particles
Transporting can be quite heavy in cloud layer.Therefore, the utilization efficiency of these materials is very low.
Traditional is exactly the middle low clouds system bigger in cloud and mist thickness by certain means using silver iodide artificial rainfall
In send out silver iodide to reaching rainfall purpose.First is that increasing the condensation nuclear volume in cloud, second is that changing the temperature in cloud, favorably
It disturbs and generates convection current.And the generation of disturbance and convection current in cloud, touching and increase in steam would be more advantageous, when in air
Ascending air bear do not live water vapor particle it is showy when, just produce rainfall.But silver iodide have as rain making catalyst
One disadvantage is exactly that catalytic temperature is low, only -4 DEG C of ability icing cores, is lower than 10 DEG C of activation rate highests.Thus its catalytic environment by
To certain limitation.
Charged particle generating device can be used to have an impact atmospheric environment, such as except haze or progress rain making.However
When the degree of supersaturation deficiency of atmosphere, then it is difficult to generate enough charged particles；Simultaneously as the prior art uses plate electrode
It discharges particle, when average particle size is greater than 110 μm, plate electrode then has little effect.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides a kind of for handling the band of atmospheric environment
Charged particle generating device, its object is to improve the efficiency that charged particle generates by pin electrode and ultraviolet source.
To achieve the above object, according to one aspect of the present invention, a kind of charged particle generating device is provided, comprising:
Channel occurs for the charged particle of ground connection；
It is set in turn in the charged particle and the entrance in channel occurs to exit:
Module, ultraviolet source and pin electrode array occur for neutral particle；
The neutral particle occurs module and is used for neutral particle is tentatively electric for generating neutral particle, the ultraviolet source
From the pin electrode array is used to occur in charged particle to generate the electric field for being greater than 15kV/m in channel, after to initial ionization
Neutral particle power generation, become charged particle.
Preferably, the Radiation intensity of the ultraviolet source is greater than 0.5W/m2。
Preferably, it is particle suction apparatus, burner or water fog generator that module, which occurs, for the neutral particle.
Preferably, the charged particle generating device further includes the first power supply, and the first output end of first power supply connects
The input terminal that module occurs for the neutral particle is connect, second output terminal connects the input terminal of the ultraviolet source, first electricity
Source is AC power source.
As it is further preferred that the charged particle generating device further includes transformer, the third of first power supply
Output end connects the input terminal of the transformer, and the output end of the transformer connects the input terminal of the pin electrode, the change
Depressor is converted to the DC voltage of 15KV~100KV for the alternating voltage of the first power supply.
Preferably, the charged particle generating device further includes control module, and the first output end of the control module connects
Connect the control terminal of the ultraviolet source.
As it is further preferred that the charged particle generating device further includes second source, the second source it is defeated
Outlet connects the input terminal of the pin electrode array, and the second source is the DC power supply of 15KV~100KV.
As it is further preferred that the second output terminal of the control module connects the control terminal of second source.
Preferably, the pin electrode array includes the pin electrode for being more than or equal to 4 being set on electrode plate.
Preferably, the exit that channel occurs in the charged particle, is additionally provided with charged particle release module；The band
Charged particle release module is for traveling to the charged particle of generation in atmospheric environment.
Preferably, the charged particle generating device further includes for fixing charged particle generation channel and can move freely
Mobile module.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, it is ultraviolet due to having used
Light source carries out initial ionization to neutral particle, and generates charged particle with pin electrode, improves the efficiency of charged particle generation,
Even if average particle size be greater than 110 μm when, can also obtain preferable ionization effect, it is verified, the quantity of charged particle with
Ordinary flat electrode is compared, and three orders of magnitude are improved；Module occurs for neutral particle in addition to using particle suction apparatus, can be with
Using burner or water fog generator, even if the vapor degree of supersaturation in atmospheric environment is lower, foot can be also generated
Enough charged particles；And charged particle generating device can be moved to target location by mobile module, it is convenient to the big of target area
Gas environmental effects.
Detailed description of the invention
Fig. 1 is charged particle generating device schematic illustration of the present invention；
Fig. 2 is pin electrode used in charged particle generating device of the present invention；
Fig. 3 is 1 structural schematic diagram of the embodiment of the present invention；
Fig. 4 is 2 structural schematic diagram of the embodiment of the present invention；
Fig. 5 is the structural schematic diagram of the embodiment 2 with mobile module；
Fig. 6 is 3 structural schematic diagram of the embodiment of the present invention；
Fig. 7 is the structural schematic diagram of the embodiment 3 with mobile module；
In all the appended drawings, identical appended drawing reference is used to denote the same element or structure；Wherein, 1- neutral particle is sent out
Raw module, 11- burner, 12- draft fan, 13- water fog generator, 2- chamber, 3- pin electrode array, 4- charged particle are released
Amplification module, 5- mobile module, 61- droplet, 62- neutral particle, 63- cylinder, 631- geometric cross-section, 67- charged particle, 7-
Ground electrode, 8- ultraviolet source.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
The droplet 61 that it is r with radius in atmosphere that Fig. 1, which is illustrated, (also referred to as " collects with having the big drop 62 that radius is R
Liquid device ") collision scheme schematic diagram around surround by droplet there are three big drop in the schematic diagram.Under the effect of gravity
Mobile liquid trap 62 collects the small droplet 61 being located in cylinder 63.The volume of cylinder 63 are as follows:
V=π * (r+R)2……(1)
Wherein π (R+r) is the area of the geometric cross-section 631 of cylinder 63；VrAnd VRIt is droplet 61 and liquid trap 62 respectively
Speed.
Collision rate N (collision frequency per unit time) can be calculated with the volume of cylinder 63 and the density C of droplet 61,
That is:
N=C*V ... (2)
The variation of non-gravity attraction between drop is realized by quantitatively propagating particle in cloud and mist, is propagated
Particle be charged particle 67.The quantity of electric charge and polarity depend on the size of droplets size distribution and particle in atmospheric portion
Distribution.
The size of electric field force can be exported for example from following equation in air:
Wherein a is the radius of neutral particle 62, ds1It is the centre distance between charged particle 67 and neutral particle 62, q is
Element charge, ε0For permittivity of vacuum.
And the size of attraction can be under between two conductor balls (the first conductor ball and the second conductor ball)
Formula obtains:
Wherein, r1Indicate the radius of the first conductor ball, r2Indicate the radius of the second conductor ball, q1Indicate that first is conductive
The carried charge of sphere, q2Indicate the carried charge of the second conductor ball, ds2It is the centre distance between two electrification spheres, particle lotus
Electricity qfIt is to be found out by electric field strength, can be obtained by following formula:
Wherein, εrFor particle relative dielectric constant；ε0For permittivity of vacuum；
dpFor particle diameter, unit m；
E is charging area electric field strength；
It is 100 μm for standard with interparticle distance, the interaction force by calculating, after the carried charge of particle, electrification
And Gravity calculation result is as shown in the table, wherein electric field strength is 20kV/m:
| Particle diameter (μm) | Electric-field charge (C) | Charged number | Interaction force (N) | Gravity (N) |
| 0.1 | 8.14e- 20 | 10 | 2.3e- 19 | 5.13e- 18 |
| 0.2 | 3.25e- 19 | 17 | 6.65e- 18 | 4.11e- 17 |
| 0.5 | 2.03e- 18 | 39 | 3.5e- 17 | 6.41e- 16 |
| 1 | 8.14e- 18 | 91 | 1.9e- 16 | 5.13e- 15 |
| 5 | 2.03e- 16 | 1367 | 4.3e- 14 | 6.41e- 13 |
| 10 | 8.14e- 16 | 5230 | 6.3e- 13 | 5.13e- 12 |
| 20 | 3.25e- 15 | 20518 | 9.69e- 12 | 4.11e- 11 |
| 50 | 2.03e- 14 | 127204 | 3.7e- 10 | 6.41e- 10 |
As seen from the above table, as the diameter of particle constantly increases, the electrically charged amount of institute increases, but the gravity of particle also increases therewith
Add, to enable minimizing influences brought by particle gravity, the diameter of particle should be the big more can play a role.
So should all particles be charged and be discharged into the atmosphere.However, average particle size is greater than by experimental analysis
At 110 μm, it is difficult to charge particle using plate electrode, therefore the present invention uses pin electrode shown in Fig. 2.
What influence of the present invention to weather can be realized by promoting the collision of neutral particle 62.This promotion is to pass through
Increase the attraction in addition to the gravitational force between neutral particle 62 to increase collision efficiency, and then is capable of forming water droplet.
And changing the attraction between drop in addition to the gravitational force is realized by traveling to charged particle 67 in atmosphere
's.There are three types of approach for the generation of neutral particle 62: first is that directly drawing from atmosphere, second is that obtaining burn incompletely by burning coal
Product grain, second is that being generated by ultrasonic fog gas generator.
The present invention meets the demand by the charged particle generating device for handling atmospheric environment.Since atmosphere contains
There is various sizes of water droplet, the drop in natural cloud and mist is usually electroneutral.The interaction that electricity generates can occur in band
Between electro-hydraulic drop itself and between charged drop and neutral drop.When charged materials are close to electroneutral drop, the pole of charge
Property with can generate opposite polarity charge inducing on the drop side towards the material, and then attract each other.Equally, induced electricity is generated
The drop of lotus attracts another electroneutral drop again in turn.The attraction of mutual attractive force or solid particle and drop between drop
Power can improve collision efficiency and speed between them, to promote to form big drop.
The present invention provides a kind of charged particle generating devices, including following components:
Channel 2 occurs for the charged particle 67 of ground connection；
It is set in turn in the charged particle and the entrance in channel 2 occurs to exit:
Module 1, ultraviolet source 8 and pin electrode array 3 occur for neutral particle 62；
It is particle suction apparatus, burner or water fog generator that module 1, which occurs, for the neutral particle 62, for generating
Neutral particle 62；When the vapor degree of supersaturation in atmospheric environment is lower than 150%, the neutral particle 62 occurs module 1 and is
Burner or water fog generator because the particle diameter sucked from atmospheric environment at this time is small and concentration is low, be not achieved compared with
Good effect；When the vapor degree of supersaturation of atmospheric environment is more than or equal to 150%, the neutral particle 62 occurs module 1 and is
Fan can be arranged as particle suction apparatus, by big compression ring in the inlet that channel 2 occurs for charged particle in particle suction apparatus
Neutral particle 62 in border sucks charged particle and channel 2 occurs.
The Radiation intensity of the ultraviolet source 8 is greater than 0.5W/m2, since ultraviolet wavelength is short, energy is high, therefore will be ultraviolet
Light source 8 is placed in front of pin electrode array 3, to carry out initial ionization to neutral particle 62, reaches the subsequent electric discharge of pin electrode array 3
To better effect.
The pin electrode array 3 includes the pin electrode for being more than or equal to 4 being set on electrode plate, the length of the needle electricity grade
Degree is preferably 12cm~13cm, and material is preferably copper, and the spacing between pin electrode is preferably 3cm~6cm；Before the pin electrode
Holding is 50cm~200cm at a distance from the wall that channel 2 occurs for charged particle, and the pin electrode array 3 is used to send out in charged particle
The electric field for being greater than 15kV/m is generated in raw channel 2, to generate electricity to the neutral particle 62 after initial ionization, becomes charged particle
67。
The exit in affiliated charged particle generation channel 2 further includes the band for spreading the charged particle 67 into atmosphere
Charged particle release module 4, charged particle release module 4 can be using the structures of similar exhaust fan.
The charged particle generating device further includes preferably including the first power supply, second source and control module, and described
First output end of one power supply connects the input terminal that module 1 occurs for the neutral particle 62, and second output terminal connection is described ultraviolet
The input terminal of light source, the input terminal of third output end link control module；The control module, the first of the control module are defeated
Outlet connects the control terminal of the ultraviolet source, and the output end of the second source connects the input terminal of the pin electrode array 3,
First power supply is AC power source, and the second source is the DC power supply of 15KV~100KV；The control module is for controlling
The power of ultraviolet source processed is to adjust its Radiation intensity.
The transformer of the first power supply can be connected using input terminal as second source, by the mains of the first power supply
Voltage is converted to the DC voltage of 15KV~100KV；The second output terminal of control module can connect the control terminal of second source,
Change the electric field strength in charged particle generation channel 2 for adjusting the voltage of second source.
The charged particle generating device is also to include the shifting that channel occurs and can move freely for fixing charged particle
Dynamic model block 5, such as carry charged particle and channel occurs and for driving automatically by the periphery ground connection in charged particle generation channel
Sail vehicle；Charged particle generating device not only can be transferred to anywhere by mobile module 5, can also realize on the move to
Charged particle 67 is sprayed in atmospheric environment, is distributed more uniform.
Fig. 2 is 3 electric discharge device schematic diagram of pin electrode array of the present invention, in an experiment, under identical voltage class, especially
When average particle size is greater than 110 μm, pin electrode is easier to discharge than plate electrode, therefore can be made using pin electrode
Particle is easier to charge, and outlet particle charge density obtains after substituting plate electrode using pin electrode in the experiment of embodiment 3
It significantly improves, when using air ion counter measures, measured value is by 1e4ions/cm3It has been increased to 1e7ions/cm3。
Embodiment 1
Fig. 3 is that charged particle generation channel 2 fills neutral particle 62 existing for script in air by the sucking of inlet fans 1
In setting, i.e., using fan as neutral particle 62 generation module 1, then neutral particle 62 using pin electrode 3 be charged for
Charged particle 67, the pin electrode array 3 of the present embodiment use copper, length 12cm, and spacing is 3cm~4cm, form 3 × 9
Array.Finally, charged particle 67 is sent in atmosphere by outlet 4, become the charged particle 6768 spread in an atmosphere.Entrance
The wind speed of fan 1 is set to 5m/s~6m/s, simultaneously as the quantity of electric charge and voltage swing are directly proportional, controller also controls electric discharge
The voltage swing of electrode, to control the quantity of electric charge of charged particle 67, in general, and under conditions of guaranteeing safety, pin electrode battle array
The voltage general control of column 3 in 20kV or so, the distance controlling of the upper surface of the discharge end and chamber of pin electrode array 3 in 1m,
Electric field strength can be made to reach 20kV/m.Wherein, the first power supply is 220V conventional AC power, for supplying to controller and fan
Electricity, second source are high voltage power supply, can also be only with the first power supply for powering to pin electrode array 3, and use transformer will
The 220V alternating current of first power supply becomes DC high-voltage.
Embodiment 2
For the major part of Fig. 4 device with Fig. 3 and indistinction, it includes draft fan 12 that difference, which is that module 1 occurs for neutral particle 62,
With burner 11, for burner 11 for generating neutral particle 62, draft fan 12 is subsequent for blowing to neutral particle 62
Make its electrification at ultraviolet source 8 and pin electrode array 3, thereafter, neutral particle 62 is by the initial ionization of ultraviolet source 8 and needle electricity
The charging of pole array 3 becomes electrically charged particle 67 and eventually arrives at the charged particle release module 4 in exit and enter atmosphere.
Increase a mobile module 5 on the basis of the charged particle generating device of Fig. 4, i.e. acquisition Fig. 5, charged particle hair
Generating apparatus may be implemented to spray charged particle 67 into atmosphere on the move, and then make charged particle 67 is relatively uniform to be distributed in
In atmosphere, atmospheric environment is preferably influenced.
Embodiment 3
With Fig. 4 and indistinction, difference is to substitute burner by ultrasonic water fog generator 13 major part of Fig. 6 device
11, and increase a mobile module 5 on the basis of the charged particle generating device of Fig. 6, i.e. acquisition Fig. 7, charged particle occurs
Device may be implemented to spray charged particle 67 into atmospheric environment on the move, and then the distribution for keeping charged particle 67 relatively uniform
In an atmosphere, atmospheric environment is preferably influenced.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of charged particle generating device characterized by comprising
Channel occurs for the charged particle of ground connection；
It is set in turn in the charged particle and the entrance in channel occurs to exit:
Module, ultraviolet source and pin electrode array occur for neutral particle；
The neutral particle occurs module and is used for for generating neutral particle, the ultraviolet source by neutral particle initial ionization,
The pin electrode array is used to occur in charged particle to generate the electric field for being greater than 15kV/m in channel, in after initial ionization
Property particle power generation, become charged particle.
2. charged particle generating device as described in claim 1, which is characterized in that the Radiation intensity of the ultraviolet source is greater than
0.5W/m2。
3. charged particle generating device as described in claim 1, which is characterized in that it is particle that module, which occurs, for the neutral particle
Suction apparatus, burner or water fog generator.
4. charged particle generating device as described in claim 1, which is characterized in that the charged particle generating device further includes
First power supply, the first output end of first power supply connect the input terminal that module occurs for the neutral particle, second output terminal
The input terminal of the ultraviolet source is connected, first power supply is AC power source.
5. charged particle generating device as claimed in claim 4, which is characterized in that the charged particle generating device further includes
Transformer, the third output end of first power supply connect the input terminal of the transformer, the output end connection of the transformer
The input terminal of the pin electrode, the transformer are converted to the direct current of 15KV~100KV for the alternating voltage of the first power supply
Pressure.
6. charged particle generating device as described in claim 1, which is characterized in that the charged particle generating device further includes
Control module, the first output end of the control module connect the control terminal of the ultraviolet source.
7. charged particle generating device as claimed in claim 6, which is characterized in that the charged particle generating device further includes
Second source, the output end of the second source connect the input terminal of the pin electrode array, the second source be 15KV~
The DC power supply of 100KV.
8. charged particle generating device as claimed in claim 7, which is characterized in that the second output terminal of the control module connects
Connect the control terminal of second source.
9. charged particle generating device as described in claim 1, which is characterized in that going out for channel occurs in the charged particle
At mouthful, it is additionally provided with charged particle release module；The charged particle release module is used to charged particle traveling to big compression ring
In border.
10. charged particle generating device as described in claim 1, which is characterized in that the charged particle generating device also wraps
Include the mobile module that channel occurs and can move freely for fixing charged particle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910151524.3A CN110047722B (en) | 2019-02-28 | 2019-02-28 | Charged particle generating device for processing atmospheric environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910151524.3A CN110047722B (en) | 2019-02-28 | 2019-02-28 | Charged particle generating device for processing atmospheric environment |
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| CN110047722B CN110047722B (en) | 2020-07-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112611240A (en) * | 2020-12-10 | 2021-04-06 | 武汉大学 | Device and method for enhancing condensation heat exchange by utilizing ion wind |
| CN112607018A (en) * | 2020-12-07 | 2021-04-06 | 华中科技大学 | Platform is scattered to electrified particle of no ground connection aircraft |
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| US6302944B1 (en) * | 1999-04-23 | 2001-10-16 | Stuart Alfred Hoenig | Apparatus for extracting water vapor from air |
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2019
- 2019-02-28 CN CN201910151524.3A patent/CN110047722B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6302944B1 (en) * | 1999-04-23 | 2001-10-16 | Stuart Alfred Hoenig | Apparatus for extracting water vapor from air |
| CN103260329A (en) * | 2013-04-23 | 2013-08-21 | 华中科技大学 | Plasma jet device with suspension electrode |
Non-Patent Citations (1)
| Title |
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| YONG YANG等: "Corona Discharge-Induced Rain and Snow Formation in Air", 《IEEE TRANSACTIONS ON PLASMA SCIENCE》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112607018A (en) * | 2020-12-07 | 2021-04-06 | 华中科技大学 | Platform is scattered to electrified particle of no ground connection aircraft |
| CN112611240A (en) * | 2020-12-10 | 2021-04-06 | 武汉大学 | Device and method for enhancing condensation heat exchange by utilizing ion wind |
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