CN1258681C - Pressure type particle generator - Google Patents
Pressure type particle generator Download PDFInfo
- Publication number
- CN1258681C CN1258681C CN 03100762 CN03100762A CN1258681C CN 1258681 C CN1258681 C CN 1258681C CN 03100762 CN03100762 CN 03100762 CN 03100762 A CN03100762 A CN 03100762A CN 1258681 C CN1258681 C CN 1258681C
- Authority
- CN
- China
- Prior art keywords
- pressure
- conduit
- particle
- lid
- fluid reservoir
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Nozzles (AREA)
Abstract
The present invention relates to an air pressure type particle generator which comprises a liquid storage tank. A cover body is arranged above the liquid storage tank, and a high pressure sealing ring is arranged between the liquid storage tank and the cover body. At least one conduit passes through the cover body and enters the liquid storage tank, and the front end of the conduit entering the liquid storage tank is provided with a nozzle. The conduit outside the cover body is connected with an airflow conveying pipe through a joint, and the airflow conveying pipe is orderly provided with an air inlet switching valve, a filter, an inlet pressure meter, an air inlet pressure regulating valve and an air source pressure meter. The airflow conveying pipe is finally connected to a high pressure source. A particle flow outlet valve, a particle flow outlet conduit and an outlet pressure meter are arranged on the cover body, wherein the outlet pressure meter can measure the pressure of particle flow at the time of flowing out. The air pressure type particle generator can control the average diameter of particles, and can regulate the quantity, the concentration and the flow quantity of the particles. The present invention has higher pressure control precision, which ensures the quality of generated particles.
Description
Technical field
The present invention relates to a kind of particle generator, especially relate to a kind of vapour-pressure type particle generator.
Background technology
At utilization LDV (Laser Dopplor Velocimetry, laser dobla knotmeter), PIV (Particle Image Velocimetry, the particle image velocity-measuring system) etc. when laser measuring technique carries out flow measurement, it is the guarantee that obtains desirable measurement result that successful trace particle produces with disseminating, and also is one of restrictive condition of this class laser measuring technique application of restriction.In order accurately to measure complex flow such as flow at high speed, turbulent flow and separated flow, trace particle must possess: good followability; Used laser there is higher scattered power; And the trace particle concentration of disseminating in measured zone must be appropriate.Therefore disseminate all must be well-designed from producing to for trace particle.
The followability of trace particle depends primarily on the diameter of particle, and parameters such as the concentration of particle and shape also have certain influence.By the analysis to the particle followability, the result shows: there is significantly hysteresis in bigger particle in strong accelerating flow; In order to follow the tracks of flow at high speed preferably, the trace particle diameter should be about 0.5 μ m.
For this reason, be vital as the size of control particle and the apparatus of number concentration.
Summary of the invention
The purpose of this invention is to provide a kind of vapour-pressure type particle generator, the mean diameter of this generator may command particle, and the quantity of adjustable particle and concentration, the flow of adjustable particle flux, this generator have higher pressure control precision, guarantee the mass particle that is generated.
Vapour-pressure type particle generator of the present invention is according to the requirement of PIV measurement to trace particle, design in conjunction with the experiment condition of striding supersonic wind tunnel, it can be applied to low-speed wind tunnel, can be applied to stride laser velocimeter such as PIV, LDV use in the supersonic wind tunnel again, and can from low speed to the transonic speed, (have shock wave, the expansion wave system) the air-flow whole flow field, PIV measures.
The objective of the invention is to realize by following technical proposals, vapour-pressure type particle generator of the present invention comprises a fluid reservoir, on fluid reservoir, be provided with a lid close-fitting with it, be provided with high-pressure seal ring between fluid reservoir and the lid, at least one conduit passes lid and enters in the fluid reservoir, the front end that enters the conduit in the fluid reservoir is provided with slit formula sonic nozzle, conduit in the lid outside connects an air delivery tube by a connector, in this air delivery tube is to be disposed with the air inlet switch valve, filtrator, the inlet pressure table, air inlet pressure regulator valve and source of the gas tensimeter, air delivery tube finally are to be connected to high-pressure air source; A particle flux outlet valve is set on lid, connects a particle at this particle flux outlet valve and flow out conduit, on lid, also be provided with the delivery gauge of a pressure can measure particle flux and flow out the time.
The described quantity of passing lid and entering into the conduit in the fluid reservoir can be set at 1-5.
Described slit formula sonic nozzle is to constitute like this, it is to cover on the xsect at pipe outlet by add a transverse baffle at common pipe outlet, keep the outlet gap of the distance formation high pressure draught between baffle plate and the pipe outlet, regulate the olesome that produces different-grain diameter by the size of regulating this slit.
Vapour-pressure type particle generator principle of work is as follows:
The course of work of vapour-pressure type particle generator is, high pressure draught enters the velocity of sound micro-nozzle, and the high velocity air that comes out from nozzle impacts, atomizing material (liquid to be atomized), forms particle in fluid reservoir, and with evenly back output of air mixed.
Particle generator has higher pressure control precision, thereby the mass particle that assurance is generated for improving its functional reliability, also is provided with liquid level warning, also can tentatively control the high pressure draught flow in addition.
The characteristics of this vapour-pressure type particle generator are as follows:
1) size of particle and number concentration are adjustable
2) can be continuously, stable, particle takes place equably, the flow of particle flux is adjustable.
3) replaceable material, and material variety various (comprise and adopt edible vegetable oil)
4) harmless, environmentally safe.
5) little to equipment pollution.
6) good and economic.
The size of particle and number concentration are influenced by following factors: (the air pressure P2 of fluid reservoir should satisfy the decline width of slit of nozzle of P1-P2＞0.1Mpa) and seam to pressure in material, import high pressure draught pressure (high pressure draught inlet pressure P1 can be 0.1-1.0Mpa), the fluid reservoir at least.Controlled 0.5 μ-10.5 μ that makes of the average particle diameter of particle generator changes.
Description of drawings
Fig. 1 is the fundamental diagram of vapour-pressure type particle generator;
Fig. 2 is the synoptic diagram of an embodiment of vapour-pressure type particle generator;
Fig. 3 is the synoptic diagram of another embodiment of vapour-pressure type particle generator.
Embodiment
Given embodiment further describes structure of the present invention below in conjunction with accompanying drawing, makes it it is had more to be well understood to.
At first referring to accompanying drawing 1, the principle of work of vapour-pressure type particle generator as shown in Figure 1, high pressure draught enters the velocity of sound micro-nozzle, the high velocity air that comes out from nozzle impacts, atomizing material (liquid to be atomized), in fluid reservoir, form particle, and evenly export the back with air mixed.
Referring to Fig. 2, the vapour-pressure type particle generator comprises a fluid reservoir M, on fluid reservoir M, be provided with a lid close-fitting with it, be provided with high-pressure seal ring I between fluid reservoir M and the lid, at least one conduit P passes lid and enters in the fluid reservoir M, the front end that enters the conduit P in the fluid reservoir M is provided with slit formula sonic nozzle F, conduit P in the lid outside connects an air delivery tube L by a connector E, on this air delivery tube L, be disposed with air inlet switch valve K, filtrator C, inlet pressure table D1, air inlet pressure regulator valve B and source of the gas tensimeter D0, air delivery tube L is connected to high-pressure air source A; A particle flux outlet valve G is set on lid, this particle flux outlet valve G connects a particle and flows out conduit R, on lid, also be provided with the delivery gauge D2 of a pressure can measure particle flux and flow out the time, particle flux from shown in outflow conduit R flow out (seeing the direction that H identifies).
Fig. 3 shows another embodiment of vapour-pressure type particle generator, and the difference of this embodiment and embodiment shown in Figure 2 is that the described quantity of passing lid and entering into the conduit in the fluid reservoir can be set at 5, only shows 3 among the figure.
Fluid reservoir M adopts stainless steel tank, inject a certain amount of vegetable oil (not having the high pressure draught nozzle) among the fluid reservoir M, certain space (being provided with air) is reserved on the upper strata, gases at high pressure enter fluid reservoir M by inlet flow rate pressure regulation B valve, during through high pressure draught nozzle F, because nozzle F is under the liquid level of oil, therefore the oil around the nozzle F is atomized into very little olesome under the drive of high velocity air, these particles enter along with high velocity air in the last sheaf space of fluid reservoir M, enter the flow field through rate of discharge valve G at last.High pressure draught nozzle F is the parts that produce the atomizing oil droplet, it is to cover on the xsect at pipe outlet by add a transverse baffle at common pipe outlet, the distance that keeps between baffle plate and the pipe outlet is exactly the outlet gap of high pressure draught, regulates the olesome that produces different-grain diameter by the size of regulating this slit.The inlet pressure scope of high pressure draught is adjustable at 0.1-1.0Mpa, the high pressure nozzle slit is adjustable, the minimum droplet diameter that uses this nozzle to produce can be regulated control, and the followability of granule oil droplet in the flow field exists shock wave to expand to verify in the flow field survey of ripple measuring M=1.5 (speed 500 meter per seconds).In addition, adopt a plurality of high pressure nozzle F, the concentration of particle flux is adjustable, and the flow of particle flux is adjustable.
Claims (3)
1, a kind of vapour-pressure type particle generator, it is characterized in that it comprises a fluid reservoir, on fluid reservoir, be provided with a lid close-fitting with it, be provided with high-pressure seal ring between fluid reservoir and the lid, at least one conduit passes lid and enters in the fluid reservoir, the front end that enters the conduit in the fluid reservoir is provided with slit formula sonic nozzle, and this nozzle is under the liquid level of oil; Conduit in the lid outside connects an air delivery tube by a connector, in this air delivery tube is to be disposed with air inlet switch valve, filtrator, inlet pressure table, air inlet pressure regulator valve and source of the gas tensimeter, and air delivery tube finally is to be connected to high-pressure air source; A particle flux outlet valve is set on lid, connects a particle at this particle flux outlet valve and flow out conduit, on lid, also be provided with the delivery gauge of a pressure can measure particle flux and flow out the time.
2, vapour-pressure type particle generator according to claim 1 is characterized in that the described quantity of passing lid and entering into the conduit in the fluid reservoir can be set at 1-5
3, vapour-pressure type particle generator according to claim 1, it is characterized in that described slit formula sonic nozzle is to constitute like this, it is to cover on the xsect at pipe outlet by add a transverse baffle at common pipe outlet, keep the outlet gap of the distance formation high pressure draught between baffle plate and the pipe outlet, regulate the olesome that produces different-grain diameter by the size of regulating this slit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03100762 CN1258681C (en) | 2003-01-23 | 2003-01-23 | Pressure type particle generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03100762 CN1258681C (en) | 2003-01-23 | 2003-01-23 | Pressure type particle generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1519565A CN1519565A (en) | 2004-08-11 |
| CN1258681C true CN1258681C (en) | 2006-06-07 |
Family
ID=34281304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03100762 Expired - Fee Related CN1258681C (en) | 2003-01-23 | 2003-01-23 | Pressure type particle generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1258681C (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100370259C (en) * | 2004-11-12 | 2008-02-20 | 中国科学院西安光学精密机械研究所 | High-speed throwing device of tracer particles in water flow field particle imaging speed measurement system |
| CN101975871B (en) * | 2010-09-27 | 2013-02-20 | 北京航空航天大学 | Fuming-type trace particle generator |
| US8708202B2 (en) * | 2011-05-10 | 2014-04-29 | Ppg Industries Ohio, Inc. | Pressure canisters for automated delivery of coating compositions |
| CN102435769A (en) * | 2011-11-21 | 2012-05-02 | 上海交通大学 | Method and device for spreading trace particles in supersonic PIV (Particle Image Velocimetry) flow field testing experiment |
| CN102764714B (en) * | 2012-08-07 | 2016-01-20 | 李洪林 | High pressure spray vapour device |
| CN103149011B (en) * | 2013-03-06 | 2015-04-15 | 中国船舶重工集团公司第七○二研究所 | Test device and method for forming high-speed stable flow field |
| CN103412143B (en) * | 2013-08-13 | 2015-01-07 | 中国航空工业集团公司北京长城计量测试技术研究所 | Supercharged type tracer particle generator |
| CN103940573B (en) * | 2014-05-06 | 2016-08-17 | 大连理工大学 | In a kind of small size PIV flow-field test experiment, trace particle dispenses device and cloth scattering method |
| CN105021367A (en) * | 2015-07-27 | 2015-11-04 | 中国航空工业集团公司哈尔滨空气动力研究所 | Portable tracer particle generator apparatus based on pressure atomization and generation method |
| CN106290978B (en) * | 2016-08-25 | 2019-05-24 | 北京航空航天大学 | A kind of transverse injection agitation blending liquid trace displaying particle generator |
| CN106563584A (en) * | 2016-10-09 | 2017-04-19 | 上海交通大学 | Quick response concentration-controllable high-flow nano-particle spreader |
| CN107132025A (en) * | 2017-06-26 | 2017-09-05 | 西华大学 | Solid particle filling device and flow field measuring device |
| CN108760219B (en) * | 2018-05-23 | 2024-06-25 | 中国航空工业集团公司沈阳空气动力研究所 | Particle generator with adjustable flow |
| CN111060713B (en) * | 2019-11-29 | 2024-08-20 | 西华大学 | Tracer particle generation and separation device for natural gas flow field measurement |
| CN113281533B (en) * | 2021-05-19 | 2022-11-01 | 上海交通大学 | Solid-state tracer particle scattering device based on hourglass filling and multi-stage filtering |
| CN113533184A (en) * | 2021-07-16 | 2021-10-22 | 天津航天瑞莱科技有限公司 | Micro-particle salt fog generating device |
-
2003
- 2003-01-23 CN CN 03100762 patent/CN1258681C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1519565A (en) | 2004-08-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1258681C (en) | Pressure type particle generator | |
| Kähler et al. | Generation and control of tracer particles for optical flow investigations in air | |
| CN103347589B (en) | Gas liquid contactor | |
| Huang et al. | A review on bubble generation and transportation in Venturi-type bubble generators | |
| Ervine et al. | Effect of turbulence intensity on the rate of air entrainment by plunging water jets. | |
| JP4226972B2 (en) | Liquid supply system | |
| CN102527541A (en) | Two-fluid jet system | |
| CN112229597B (en) | Tracer particle generator for large-scale high-speed wind tunnel PIV test | |
| JP2004268037A (en) | Method for atomizing liquid and mist produced with the method | |
| CN202158945U (en) | Solid-state particle generator | |
| CN113405768B (en) | Air flow field PIV trace particle preparation device and method based on nano bubble technology | |
| JP2007021608A5 (en) | ||
| KR101589284B1 (en) | A Evaporation Cooling Type of Spraying Apparatus Having Nozzle Assembly Forming Hyperfine Atomized Droplet | |
| CN104019957B (en) | Nano-particle Fluidizer and supersonic wind tunnel system | |
| CN106123976A (en) | A kind of measure in multiphase flow oil, the measurement apparatus of gas and water three-phase each volume flow and measuring method | |
| CN111060713B (en) | Tracer particle generation and separation device for natural gas flow field measurement | |
| Jiang et al. | Hydraulic performance and jet breakup characteristics of the impact sprinkler with circular and non-circular nozzles | |
| CN212779851U (en) | Tracer particle generator for large-scale high-speed wind tunnel PIV test | |
| CN206045990U (en) | A kind of aerosol generator based on venturi principle | |
| Siller et al. | Control of the separated flow downstream of a two-dimensional fence by low-frequency forcing | |
| CN215448398U (en) | Airflow field PIV tracer particle preparation device based on nanobubble technology | |
| CN106179139A (en) | A kind of aerosol generator based on venturi principle | |
| Kähler et al. | Generation and control of tracer particles for optical flow investigations in air | |
| Shraiber et al. | Experimental study of the laws of interaction between small particles and large drops | |
| CN215465312U (en) | Wet fog generator and salt aerosol generating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060607 Termination date: 20110123 |