CN102903586B - Ionic wind airflow accelerator and ionic wind airflow characteristic research device and method - Google Patents
Ionic wind airflow accelerator and ionic wind airflow characteristic research device and method Download PDFInfo
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- CN102903586B CN102903586B CN201210346535.5A CN201210346535A CN102903586B CN 102903586 B CN102903586 B CN 102903586B CN 201210346535 A CN201210346535 A CN 201210346535A CN 102903586 B CN102903586 B CN 102903586B
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Abstract
The invention discloses an ionic wind airflow accelerator. The ionic wind airflow accelerator comprises an electrode structure consisting of a corona electrode and a collector electrode, and a high-voltage power supply for applying voltage between the corona electrode and the collector electrode, wherein the electrode structure is in a line-plate type discharge form, and the corona electrode comprises a barb type corona wire with high discharge capability and low electromagnetic interference. The invention also discloses an ionic wind airflow characteristic research device and a method. The ionic wind airflow accelerator in the invention can achieve the purpose of non-contact measurement without disturbance through a particle imaging technology so as to more accurately research the ionic wind airflow characteristic, and according to the invention, the ionic wind airflow characteristic through voltage changes at different gears is researched and the total flow field airflow characteristic of ionic wind at different voltages by processing experimental data is further analyzed to obtain an ionic wind speed change curve in voltage fluctuation.
Description
Technical field
The present invention relates to field of gas discharge, particularly a kind of ion wind flow characteristic research apparatus and method.
Background technology
Differ between great corona discharge electrode and collector electrode in radius of curvature size and apply high pressure, induce the air ionization at the little ate electrode of radius of curvature, be so-called corona discharge phenomenon.Namely ion wind flow accelerator is produced air-flow by ion motion when utilizing atmospherical discharges and driven neutral gas molecule motion around to realize air-flow to accelerate.The essence of ion wind air accelerator mechanism is air molecule generation corona discharge, and the neutral particle in induced air occurs to ionize and produces the process of air motion.
Since British Hauksbee in 1709 finds ion wind phenomenon, many scholars once carried out research to this phenomenon, until after twoth century, just tentatively established the theoretical explanation to ion wind effect.
Improving ion wind velocity is advanced subject in recent years in international ion wind research field, in order to improve the air velocity of ion wind air acceleration device, international academic community has delivered pin-board-like, line-board-like, line-tubular type, line-line formula, pin-ring type, line-cartridge type isostructural ion wind generating means technological achievement.Scholars mainly stresses in voltage across poles and electrode structure etc. the research of ion wind technology, and voltage across poles mainly comprises pulse voltage, direct voltage and high-frequency and high-voltage etc.; Electrode structure mainly contains needle to board electrode structure, line-plate electrode structure, wire-cylinder electrodes structure etc.In addition, people are applied to the fields such as aerodynamic flow control, electrostatic precipitation, air cleaning, drying, heat radiation ion wind technology.
But the research process of ion wind flow characteristic in the past, has following limitation:
A, anemobiagraph is directly put into fluid passage, belong to contact disturbance and measure, stream field interference greatly;
When b, traditional particle imaging technique carry out flow field survey, the method for employing direct insufflation gas in fluid passage, easily causes the uneven of smokescope;
C, traditional ion wind characteristic research are only only limitted to single-point or the multiple spot characteristic of studying wind speed, cannot show whole flow field;
D, traditional flow accelerator easily cause electromagnetic interference, produce point discharge.
Therefore, how to design the strong and ion wind flow accelerator that electromagnetic interference is little of a kind of discharge capability, and how to design a kind of ion wind flow characteristic research device and research method thereof, can more adequately study ion wind flow characteristic, be those skilled in the art's technical problems urgently to be resolved hurrily.
Summary of the invention
In view of this, the invention provides a kind of ion wind flow characteristic research apparatus and method, ion wind flow characteristic can be studied more accurately and effectively with this.
For achieving the above object, the invention provides following technical scheme:
A kind of ion wind flow accelerator, comprise the electrode structure be made up of corona discharge electrode and collector electrode, and alive high voltage source is executed between described corona discharge electrode and described collector electrode, described electrode structure is line-board-like discharge type, and described corona discharge electrode comprises bur type corona wire.
Preferably, in above-mentioned ion wind flow accelerator, described electrode structure adopts level Four electrode structure, and described bur type corona wire is evenly arranged.
A kind of ion wind flow characteristic research device, comprise described ion wind flow accelerator, also comprise the measurement mechanism for particle imaging, described measurement mechanism comprises:
Transparent and sealing fluid passage, described corona discharge electrode and described collector electrode all adopt seal to be fixed, and are arranged in described fluid passage, and described high voltage source is arranged at outside described fluid passage;
For carrying out the CCD camera of taking in particle imaging process, the lens direction of described CCD camera keeps vertical with the region to be measured in described fluid passage;
Laser, described laser can send sheet laser and illuminate the laser optical head in whole flow field to be measured, and the direction of illumination of described sheet laser keeps vertical with the region to be measured in described fluid passage;
For recording and showing the computer of test data;
Luminous and control the controller of described CCD camera shooting for controlling described laser, described controller is connected with described computer.
Preferably, in above-mentioned ion wind flow characteristic research device, also comprise and be arranged in described fluid passage, for scattering the aerosol producer of trace particle.
Preferably, in above-mentioned ion wind flow characteristic research device, described aerosol producer comprises electric furnace, and the solid particle of kerosene or glycerine, described solid particle open containers splendid attire, and is positioned on described electric furnace.
Preferably, in above-mentioned ion wind flow characteristic research device, also comprise and be positioned at outside described fluid passage, in order to regulate the regulator of described electric furnace voltage.
Preferably, in above-mentioned ion wind flow characteristic research device, the switch of described high voltage source has the different different gears of voltage magnitude.
Preferably, in above-mentioned ion wind flow characteristic research device, described high voltage source adopts the control mode of pulse-width modulation, and the switch of described high voltage source has the different different gears of electric voltage frequency.
Preferably, in above-mentioned ion wind flow characteristic research device, the material of described fluid passage is polymethyl methacrylate.
A kind of ion wind flow characteristic research method, comprises the following steps:
Step one: arrange and connect ion wind flow accelerator and particle imaging measurement mechanism, wherein, the sheet laser direction making the lens direction of the CCD camera of described particle imaging measurement mechanism and laser send is arranged vertically with the region to be measured in the fluid passage of described ion wind flow accelerator respectively;
Step 2: open described ion wind flow accelerator and described particle imaging measurement mechanism, make the direct voltage of the high voltage source of described ion wind flow accelerator constant, change amplitude and the frequency of alternating current component, the image of the described lower described region to be measured of particle imaging measurement mechanism shooting under different voltage magnitude and frequency, and record experimental data, by the change of the ion transport ability in region to be measured described in described experimental data and described graphical analysis;
Step 3: the experimental data of the ion wind velocity described ion wind flow accelerator recorded under the voltage of different frequency and/or different amplitude processes, obtains the curve of the ion wind velocity change under voltage fluctuation.
As can be seen from above-mentioned technical scheme, electrode structure employing line in the ion wind flow accelerator that the embodiment of the present invention provides-board-like, and corona discharge electrode adopts bur type corona wire, both can reach the object that discharge capability strengthens, there is again the characteristic of being convenient to fix, electromagnetic interference is little.In addition, the ion wind flow characteristic research device that the embodiment of the present invention provides, the measurement mechanism of particle imaging is adopted to study the stream condition in above-mentioned ion wind flow accelerator, this experimental data is obtained by controller and computer control, all testing apparatuss are all as the outside of fluid passage 6, and by image record whole audience air-flow phenomenon, achieve undisturbed, contactless measurement, and whole audience gas characteristic can be shown, reach the object studying ion wind flow characteristic exactly.The ion wind flow characteristic research method that the embodiment of the present invention provides, by the change in voltage research stream condition of different gear, and obtained the curve of the ion wind velocity change under voltage fluctuation by process experimental data, thus analyze the whole audience stream condition under different voltage further.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the electrode structure of the ion wind flow accelerator that Fig. 1 provides for the embodiment of the present invention;
The arrangement schematic diagram of the ion wind flow characteristic research device that Fig. 2 provides for the embodiment of the present invention;
Fig. 3 is the polar plot of the ion wind VELOCITY DISTRIBUTION obtained in one embodiment of the invention;
Fig. 4 is the curve of the ion wind velocity change obtained in one embodiment of the invention.
Embodiment
The invention discloses a kind of ion wind flow characteristic research apparatus and method, can more adequately study ion wind flow characteristic with this.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1-Fig. 4, the structural representation of the electrode structure of the ion wind flow accelerator that Fig. 1 provides for the embodiment of the present invention, the arrangement schematic diagram of the ion wind flow characteristic research device that Fig. 2 provides for the embodiment of the present invention, Fig. 3 is the polar plot of the ion wind VELOCITY DISTRIBUTION obtained in one embodiment of the invention, and Fig. 4 is the curve of the ion wind velocity change obtained in one embodiment of the invention.
The ion wind flow accelerator that the present invention one specific embodiment provides, comprise the electrode structure be made up of corona discharge electrode 11 and collector electrode 12, and between corona discharge electrode 11 and collector electrode 12, apply the high voltage source 1 of high-tension electricity, this electrode structure is line-board-like discharge type, and corona discharge electrode 11 comprises bur type corona wire 111.
The quality of corona discharge electrode 11 discharge capability is relevant with the wedge angle (both curvature) of discharge lines in corona discharge electrode 11, and the form of corona discharge electrode 11 has multiple, and the effect of discharging sharp-angle corona is more at most also better.Barb type H corona wire H111 is a kind of corona wire of new construction, utilizes sheet metal to bend and forms, and be provided with the prickle vertical with corona wire in the both sides of steel plate.Bur type corona wire 111 also has higher mechanical strength, and not easily breaks, cheap.Because the electrode structure in the ion wind flow accelerator that the embodiment of the present invention provides is line-board-like discharge type, and corona discharge electrode adopts bur type corona wire 111, so, both can reach the object that discharge capability strengthens, there is again the characteristic of being convenient to fix, electromagnetic interference is little.
In the present embodiment, discharge type adopts level Four electrode structure, and namely have the electrode structure form of four corona discharge electrodes, its discharge capability strengthens greatly.In addition, the bur type corona wire 111 in the present embodiment is evenly arranged, and to obtain equally distributed electric discharge field, is convenient to the treatment and analyses of experimental data, obtains more adequately test result.
Present invention also offers a kind of ion wind flow characteristic research device, this research device comprises the ion wind flow accelerator provided in above-described embodiment, also comprise the measurement mechanism for particle imaging, this measurement mechanism comprises fluid passage 6, CCD (Charge-coupled Device, charge coupled cell) camera 7, laser 4, computer 8 and controller 9.
Wherein, fluid passage 6 is polymethyl methacrylate that is transparent and sealing, and preferably its thickness is 5mm, and is the square of 40cm*40cm*40cm.But, what those skilled in the art will find apparent that is, the size of fluid passage 6 is not limited to this, and material is also not limited only to polymethyl methacrylate, as long as be convenient to the transparent material observing and take trace particle in fluid passage 6, concrete size and the material of the fluid passage 6 that the present embodiment provides are only preferred version, and therefore, the present invention is not construed as limiting this.
Wherein, corona discharge electrode 11 and collector electrode 12 all adopt seal be fixed and be arranged in fluid passage 6, and to make Electric Field Distribution even, ion wind velocity is stablized; CCD camera 7 is taken for the trace particle in convection cell passage 6 in particle imaging process, and therefore, the lens direction of CCD camera 7 keeps vertical with the region to be measured in fluid passage 6; Laser 4 has can send sheet laser and the laser optical head 2 illuminating whole region to be measured, and the sheet laser direction that this laser optical head 2 sends keeps vertical with the region to be measured in fluid passage 6; Computer 8 is for recording and showing test data; Controller 9 is luminous for controlling laser 4, and control CCD camera 7 simultaneously and take a picture, therefore, laser 4 is connected with computer 8 respectively by controller 9 with CCD camera 7.When carrying out experimental study, the position relationship between the arrangement that ion wind flow characteristic research device is concrete and each device refers to Fig. 2.
Due to the ion wind flow characteristic research device that the embodiment of the present invention provides, the measurement mechanism of particle imaging technique is adopted to study the stream condition in above-mentioned ion wind flow accelerator, this experimental data controls to obtain by controller 9 and computer 8, and all testing apparatuss are all as the outside of fluid passage 6, can by image record whole audience air-flow phenomenon, therefore, achieve undisturbed, contactless measurement, and whole flow field characteristic can be shown, reach the object studying ion wind flow characteristic exactly.
In order to optimize technique scheme further, the present invention also comprises the aerosol producer 5 for scattering trace particle, and this aerosol producer 5 is arranged in fluid passage 6.In the present embodiment, aerosol producer 5 comprises electric furnace, and the solid particle of kerosene, this solid particle open containers splendid attire, and is positioned on electric furnace.When electric furnace electrified regulation, the solid particle of kerosene just evaporates into vapour particles, i.e. smog, spreads in fluid passage 6 and becomes trace particle, when producing ion wind in ion wind flow accelerator, this trace particle then plays is convenient to the effect that CCD camera 7 photographs flux map picture.But; for a person skilled in the art; the selection of trace particle can have kinds of schemes; as long as the solid particle of the trace particle smog of followability and good fluidity can be evaporated into; such as the solid particle of kerosene in aerosol producer 5 is changed the solid particle making glycerine to be also fine; therefore, the utility model does not limit for the concrete composition of trace particle.
And, be evenly distributed to make the trace particle in fluid passage 6, research device in the present embodiment also comprises the regulator 3 for regulating the smokescope in fluid passage 6, this regulator 3 is positioned at outside fluid passage 6, and aerosol producer 5 is connected with regulator 3 respectively by wire with fluid passage 6.What needs further illustrated is, regulator 3 herein mainly comprises the adjustable transformer of a voltage, and aerosol producer 5 is carried out to the power supply of the voltage source between 0-220V, by regulating electric furnace voltage, to regulate its firing rate, thus regulate evaporation rate and the speed of distribution of trace particle, namely reach the object of the smokescope regulated in fluid passage 6.
Due in traditional experiment method, when utilizing particle imaging technique to carry out flow field survey, adopt the method for direct insufflation gas in fluid passage, easily cause the uneven distribution of smokescope, and in the embodiment of the present invention, aerosol producer 5 is directly arranged in fluid passage 6, not only make experimental implementation more easy, and can be control effectively by the concentration of regulator 3 pairs of trace particles, namely regulate furnace temperature by regulator 3, ensure that trace particle in whole fluid passage is moderate and uniformly scatter.
In the present embodiment, the switch 10 of high voltage source 1 has the different different gears of voltage magnitude, and in order to optimize technique scheme further, high voltage source 1 adopts the control mode of pulse-width modulation, and switch 10 has the different different gears of electric voltage frequency.Such as, the switch 10 of high voltage source 1 is divided into three gears, and such as, low-grade 18kv, middle-grade 19kv, high-grade 20k, open three gears respectively, realize the minor fluctuations of voltage magnitude and frequency change.But for the gear number of the switch 10 of high voltage source 1 and voltage magnitude corresponding to each gear and frequency size, the present invention does not limit.
In addition, present invention also offers a kind of ion wind flow characteristic research method, this research method comprises the following steps:
Step one: arrange and connect ion wind flow accelerator and particle imaging measurement mechanism, wherein, the sheet laser direction making the lens direction of the CCD camera 7 of described particle imaging measurement mechanism and laser optical head 2 send is arranged vertically with the region to be measured in the fluid passage 6 of ion wind flow accelerator respectively;
Step 2: open ion wind flow accelerator and particle imaging measurement mechanism, make the direct voltage of the high voltage source 3 of ion wind flow accelerator constant, change amplitude and the frequency of alternating current component, particle imaging measurement mechanism is then taken the image of lower region to be measured under different voltage magnitude and frequency and is recorded experimental data, by the change of the ion transport ability in described experimental data and described graphical analysis region to be measured;
Step 3: the experimental data of ion wind velocity ion wind flow accelerator recorded under the voltage of different frequency and/or different amplitude processes, obtains the curve of the ion wind velocity change under voltage fluctuation.
When carrying out the mensuration of ion wind flow accelerator, as shown in Figure 2, the reliability and stability of experimental provision are first regulated.Flow accelerator is put into fluid passage 6 inner, transparent sealing, regulates the position of CCD camera 7, make whole device can be clear within the coverage of CCD camera 7.After regulating filming apparatus, carry out disseminating of trace particle, according to the selection principle of trace particle, followability and good fluidity, adopt solid particle kerosene.Aerosol producer 5, is control effectively by the concentration of a regulator 3 pairs of trace particles, is changed, ensure that the trace particle in whole fluid passage uniformly scatters, trace particle moderate concentration by the difference of regulator 3.Aerosol producer 5 is connected with outside regulator 3 by wire with fluid passage 6, realizes the control to the uniformity that smokescope and trace particle distribute.
When adopting particle imaging technique, first to, by ion wind flow accelerator energising test, regulate the switch 10 of ion wind flow accelerator mesohigh power supply 1 normally can produce ion wind; Secondly, will according to measurement test requirements document, software and hardware system parameter setting is carried out to test macro, and adjust the fluid passage 6 of ion wind flow accelerator, laser optical head 2, CCD camera 7 three position, the lens direction of CCD camera 7 is made to keep vertical with the region to be measured of fluid passage 6, laser optical head 2 can send sheet laser and can illuminate the flow field to be measured in whole fluid passage 6, and the light source direction that namely laser optical head 2 sends keeps vertical with the region to be measured of fluid passage 6; 3rd, to debug the concentration of trace particle, in ion wind flow accelerator, disseminate trace particle, open the switch 10 of the high voltage source 1 of ion wind flow accelerator, pilot scale study repeatedly, ensures that the size of trace particle and concentration are applicable to experiment condition; In addition, experimentation should ensure the seal of fluid passage 6 and the temperature stability of surrounding experimental situation, with this, ensures that experiment can photograph flow field figure picture clearly.
CCD camera 7 is kept out at three different gears, the situation of change of ion wind velocity under middle-grade, high-grade change in voltage as shown in Figure 3.High voltage source 1 adopts PWM (Pulse Wavelength Modulation, pulse width modulation) control mode, in experiment, the direct voltage of high voltage source 1 is constant, by changing the amplitude of alternating current component and frequency, experimental analysis its to the change of the transport capability of ion.
Experiment parameter is as follows: the distance d=12mm between corona discharge electrode and collector electrode, high voltage source 1 direct current (DC) bias Vdc=18Kv, the PWM cycle is 55 μ s, 50 μ s, 46 μ s, pulsewidth is that the flow field change of 10 μ s all can be shown by the picture photographed, thus the fluctuation along with voltage can be found out, the i.e. change of amplitude and frequency, the size and Orientation of air-flow also presents different change.
In an EXPERIMENTAL EXAMPLE, be 46 μ s when the PWM cycle, pulsewidth is 10 μ s, and the polar plot of anode-cathode distance ion wind VELOCITY DISTRIBUTION when d=12mm is as Fig. 3.In above-mentioned polar plot, arrow direction represents air flow direction, and from polar plot, air-flow overall trend becomes bottom horizontal flow sheet state, and the air velocity of vertical direction seldom (a small amount of air velocity is the experimental error because electromagnetic interference produces).
The experimental data of the ion wind velocity recorded under the PWM different cycles of ion wind flow accelerator high voltage source 1 and amplitude is processed, obtains the curve of the ion wind velocity change under its voltage minor fluctuations, as shown in Figure 4.Distance d=12mm between corona discharge electrode 11 and collector electrode 12, on high voltage source 1 direct current (DC) bias Vd=18Kv during the alternating voltage of superposition one amplitude and changeable frequency, during PWM cyclomorphosis, flow field electric discharge field domain is mainly distributed near corona discharge electrode 11, i.e. ionized region; Electric discharge field domain around collector electrode is very faint, and especially around collector electrode, namely in drift region, ion wind velocity is all almost 0; And airflow direction presents stable tendency substantially, namely flow to collector electrode direction from corona discharge electrode direction.The essence of its mechanism of ion wind flow accelerator is that air molecule generation corona discharge induces other molecule that the process of ionization occurs.Only meet at corona discharge electrode institute making alive the ionized region that " discharge inception voltage " could form corona discharge electrode, when corona discharge electrode institute making alive is less than arc voltage, voltage is higher, the ion that ionic discharge produces will be more, corresponding ion concentration will be higher, the transport capability of ion will be stronger, and the throughput of generation will be larger, macroscopically shows as the increase of ion wind velocity.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (6)
1. an ion wind flow characteristic research device, it is characterized in that, comprise the electrode structure be made up of corona discharge electrode (11) and collector electrode (12), and alive high voltage source (1) is executed between described corona discharge electrode (11) and described collector electrode (12), described electrode structure is line-board-like discharge type, and described corona discharge electrode (11) comprises bur type corona wire (111), described electrode structure adopts level Four electrode structure, and described bur type corona wire (111) is evenly arranged, also comprise the measurement mechanism for particle imaging, described measurement mechanism comprises:
Transparent and sealing fluid passage (6), described corona discharge electrode (11) and described collector electrode (12) all adopt seal to be fixed, and be arranged in described fluid passage (6), described high voltage source (1) is arranged at described fluid passage (6) outward;
For carrying out the CCD camera (7) of taking in particle imaging process, the lens direction of described CCD camera (7) keeps vertical with the region to be measured in described fluid passage (6);
Laser (4), described laser (4) can send sheet laser and illuminate whole described region to be measured, and the direction of illumination of described sheet laser keeps vertical with the region described to be measured in described fluid passage (6);
For recording and showing the computer (8) of test data;
Luminous and control the controller (9) that described CCD camera (7) takes for controlling described laser (4), described controller (9) is connected with described computer (8);
Also comprise and be arranged in described fluid passage (6), for scattering the aerosol producer (5) of trace particle, described aerosol producer (5) comprises electric furnace, and the solid particle of kerosene or glycerine, described solid particle open containers splendid attire, and be positioned on described electric furnace.
2. ion wind flow characteristic research device according to claim 1, is characterized in that, also comprises and is positioned at described fluid passage (6) outward, in order to regulate the regulator (3) of described electric furnace voltage.
3. ion wind flow characteristic research device according to claim 1, is characterized in that, the switch (10) of described high voltage source (1) has the different different gears of voltage magnitude.
4. ion wind flow characteristic research device according to claim 1, it is characterized in that, described high voltage source (1) adopts the control mode of pulse-width modulation, and the switch (10) of described high voltage source (1) has the different different gears of electric voltage frequency.
5. the ion wind flow characteristic research device according to any one of claim 4, is characterized in that, the material of described fluid passage (6) is polymethyl methacrylate.
6. an ion wind flow characteristic research method, is characterized in that, comprises the following steps:
Step one: arrange and connect ion wind flow accelerator and particle imaging measurement mechanism, wherein, the sheet laser direction making the lens direction of the CCD camera (7) of described particle imaging measurement mechanism and laser (4) send is arranged vertically with the region to be measured in the fluid passage (6) of described ion wind flow accelerator respectively;
Step 2: open described ion wind flow accelerator and described particle imaging measurement mechanism, make the direct voltage of the high voltage source of described ion wind flow accelerator (3) constant, change amplitude and the frequency of alternating current component, the image of the described lower described region to be measured of particle imaging measurement mechanism shooting under different voltage magnitude and frequency, and record experimental data, by the change of the ion transport ability in region to be measured described in described experimental data and described graphical analysis;
Step 3: the experimental data of the ion wind velocity described ion wind flow accelerator recorded under the voltage of different frequency and/or different amplitude processes, obtains the curve of the ion wind velocity change under voltage fluctuation.
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| CN2632547Y (en) * | 2003-07-15 | 2004-08-11 | 宁波澳美尼生物工程有限公司 | Air sterilizing purifier of central air-conditioner |
| CN101914904A (en) * | 2009-11-13 | 2010-12-15 | 中国安全生产科学研究院 | Fire simulation experiment equipment for caverns in hydraulic and hydro-power engineering and simulation experiment method |
| CN202839525U (en) * | 2012-09-18 | 2013-03-27 | 杭州天明环保工程有限公司 | Ionic wind air flow accelerating device and ionic wind air flow characteristic research device |
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| CN2632547Y (en) * | 2003-07-15 | 2004-08-11 | 宁波澳美尼生物工程有限公司 | Air sterilizing purifier of central air-conditioner |
| CN101914904A (en) * | 2009-11-13 | 2010-12-15 | 中国安全生产科学研究院 | Fire simulation experiment equipment for caverns in hydraulic and hydro-power engineering and simulation experiment method |
| CN202839525U (en) * | 2012-09-18 | 2013-03-27 | 杭州天明环保工程有限公司 | Ionic wind air flow accelerating device and ionic wind air flow characteristic research device |
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| 离子风空气加速器流场的PIV技术研究;庄蒙蒙等;《机械工程师》;20111231(第12期);第2页左栏第1-7段、以及附图2-3 * |
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