CN102053048B - Dynamic aerosol wind tunnel detection system - Google Patents
Dynamic aerosol wind tunnel detection system Download PDFInfo
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- CN102053048B CN102053048B CN2009101801519A CN200910180151A CN102053048B CN 102053048 B CN102053048 B CN 102053048B CN 2009101801519 A CN2009101801519 A CN 2009101801519A CN 200910180151 A CN200910180151 A CN 200910180151A CN 102053048 B CN102053048 B CN 102053048B
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Abstract
The invention relates to a dynamic aerosol wind tunnel detection system, which comprises a plurality of air filters, an air cavity, an induced draft fan, a combustion section, a catalyst device, a diffusion section, at least one primary constant dilution type diluter, a draft fan, a forward scattering spectrometer probe (FSSP), a passive cavity aerosol spectrometer probe (PCASP), a data acquisition singlechip, and a jet diluter between an extended sampling interface and the air outlet of a last stage constant dilution type diluter, wherein the front end of the jet diluter is provided with a sample gas inlet, the lateral surface of the front end of the jet diluter is provided with more than one group of symmetrical compressed air inlets, the rear end of the jet diluter is provided with a sampling port, and the lateral surface of the rear end of the jet diluter is provided with an air outlet. The system can simulate onboard dynamic condition and the like and detect nuclear particle scale spectrums generated by flame bar combustion at different wind velocities and other aerosol generating devices.
Description
Technical field
The present invention relates to the dynamic wind-tunnel detection system of a kind of gasoloid, particularly related to a kind of dynamic wind-tunnel detection system of gasoloid that is used for the burning of flame bar under the airborne condition of simulated environment and other aerosol generating devices.
Background technology
Gasoloid is the general name of the solid-state or liquid particles that suspends in the air, can be suspended in the set of the liquid or solid ion in the gas phase media for a long time.Along with industrial expansion all can consciously or unconsciously have the aerocolloidal stage of generation in many operations, for example feed just possibly provide suitable particle for aerocolloidal generation in through flame, laser or burner.Be to the risk assessment of health or producing the gasoloid system that meets the requirements in the control production run all needs people to understand and measurement of gas colloidal sol by a lot of instruments at the research gasoloid; Yet some situation can't directly detect the gasoloid of generation with existing metering system; This just needs the gasoloid generative process under these specific conditions of simulation to adopt certain intermediate technology means to make it can use conventional Instrument measuring; As the nuclear particle yardstick spectrum of the measurement flame bar burning of flying is quite difficult, and conventional means can't be measured.The domestic conventional catalysts method of sampling be with medicine appearance in combustion chambers burn, static sampling, the result who measures like this has some discrepancy, out of true with actual dynamic testing result.
The gordian technique that gasoloid detects is the isokinetic sampling.The detection wind-tunnel of U.S. NCAR is the detection under dynamically, and it has represented current world standard.This detects 25.4 centimetres of wind-tunnel burning zone diameters, and long 1.5 meters, design wind speed is 40 meter per seconds; The full-scale malleation of flame bar, isokinetic sampling, but adopt malleation to detect, when the sampling mouth is sampled facing to the gasoloid air-flow; Because aerosol particle action of inertia; The gasoloid flow velocity that flows into the sampling mouth can make the result on the low side greater than in the wind-tunnel during flow velocity, otherwise then higher.Therefore adopt still out of true of malleation testing result.
Therefore need a kind of wind-tunnel of design system to come the gasoloid under the analogue measurement dynamic condition, for example simulate the burning situation of flame bar under airborne condition, and accurately measure the nuclear particle yardstick spectrum of flame bar burning.
Summary of the invention
The object of the present invention is to provide the dynamic wind-tunnel detection system of a kind of gasoloid, it can be simulated airborne and wait under the dynamic condition, the nuclear particle yardstick spectrum that flame bar burning and other aerosol generating devices produce when detecting different wind speed.
In order to accomplish goal of the invention of the present invention; The dynamic wind-tunnel detection system of a kind of gasoloid of the present invention comprises: several air strainers, air chamber, forced-and-induced draft fan, burning zone, catalyst-assembly, diffuser, the permanent dilution formula of one-level diluter, blower fan, FSSP, PCASP, particle spectrometer and data acquisition single-chip microcomputer at least; 3-6 air strainer links to each other with the air intake opening of air chamber; One end of forced-and-induced draft fan links to each other with the gas outlet of air chamber; The other end of forced-and-induced draft fan links to each other with diffuser with burning zone successively; Catalyst-assembly is housed in burning zone; The air intake opening of permanent dilution formula diluter links to each other with the gas outlet of diffuser or the permanent dilution formula of upper level diluter, the gas outlet of permanent dilution formula diluter and next stage permanent dilution formula diluter or with FSSP, PCASP and particle spectrometer one of or combination in any link to each other, wherein: it also comprises: be contained in the jetting type diluter between the gas outlet of PCASP and final stage perseverance dilution formula diluter; The sample gas air intake opening that the front end of jetting type diluter has; The leading portion side of jetting type diluter has the compressed air inlet of 1 group of above symmetry, and there is thief hatch the rear end of jetting type diluter, and near the jetting type diluter side the thief hatch has the gas outlet; The sample gas air intake opening is equipped with the jet draft tube; Compressed air inlet links to each other with gas mass flow control box, moisture trap, pressure maintaining valve, air compressor and air strainer successively, on the jetting type diluter of compressed air inlet rear end, the jet ring is housed, and the jet ring makes the high-speed air generation negative pressure that is got into by compressed air inlet make sample gas be inhaled into the cavity of jetting type diluter by air intake opening and fully mixes; The thief hatch of jetting type diluter is equipped with the PCASP sampling head, and the PCASP sampling head reaches before the gas outlet in the jetting type diluter;
The dynamic wind-tunnel detection system of a kind of gasoloid of the present invention; Wherein: the front end of said permanent dilution formula diluter has the sample gas air intake opening; Sampling pipe is contained on the prime air intake opening and extend in the perseverance dilution formula diluter of diffuser or upper level, and permanent dilution formula diluter leading portion side has the filtered air inlet, and this air intake links to each other with an air strainer; The rear end of permanent dilution formula diluter has the gas outlet, and expanded type sampling interface is housed on this gas outlet;
The dynamic wind-tunnel detection system of a kind of gasoloid of the present invention; Wherein: the central authorities of described expanded type sampling interface have a main thieff hatch; Have 4-8 expansion thieff hatch on the disc of expanded type sampling interface; The sampling pipe of the permanent dilution formula of main thieff hatch and next stage diluter or the sampling pipe that leads to FSSP link to each other, expand thieff hatch and link to each other with PCASP and/or particle spectrometer with blower fan;
The dynamic wind-tunnel detection system of a kind of gasoloid of the present invention, wherein: said permanent dilution formula diluter is one-level, secondary or three grades of diluters;
The dynamic wind-tunnel detection system of a kind of gasoloid of the present invention; Wherein: said permanent dilution formula diluter is the permanent dilution formula of a secondary diluter; The air intake opening of the permanent dilution formula of first order diluter links to each other with the gas outlet of diffuser; The gas outlet of the permanent dilution formula of first order diluter links to each other with the particle spectrometer with the air intake opening of the second level permanent dilution formula diluter, and the gas outlet of the second level permanent dilution formula diluter links to each other with FSSP, PCASP and particle spectrometer;
The dynamic wind-tunnel detection system of a kind of gasoloid of the present invention, wherein: said particle spectrometer is engine exhaust emission particle particle diameter spectrometer, aerodynamic size spectrometer or cloud condensation nucl counter;
The dynamic wind-tunnel detection system of a kind of gasoloid of the present invention, wherein: said burning zone and diffuser are equipped with pitot tube and Temperature Humidity Sensor respectively, and pitot tube links to each other with the data acquisition single-chip microcomputer respectively with Temperature Humidity Sensor.
After adopting such scheme, the dynamic wind-tunnel detection system of gasoloid of the present invention makes that pure air-flow is evenly parallel and stablizes, is convenient to dynamically to show experiment; Wind speed can stepless speed regulation, wind speed homogeneity and good reproducibility, maximum wind velocity can reach 120 metre per second (m/s)s, can simulate the flying speed of most of shadow operation aircrafts, usage range is wider; Adopt aerosol samplings such as negative pressure, coaxial constant speed technology, reduced to greatest extent that air-flow does not change original motion state of floating particle to the influence that aerosol granularity distributes in the sampling process, improved the confidence level and the precision of sampling.
Description of drawings
Fig. 1 is the structural representation of the dynamic wind-tunnel detection system of gasoloid of the present invention;
Fig. 2 is the synoptic diagram of jetting type diluter in Fig. 1;
Fig. 3 is the forward synoptic diagram in Fig. 1 aperture plate.
Embodiment
As shown in Figure 1; The dynamic wind-tunnel detection system of gasoloid of the present invention comprises: the dynamic wind-tunnel detection system of a kind of gasoloid; It comprises: several air strainers 1, air chamber 2, forced-and-induced draft fan 3, burning zone 4, catalyst-assembly 5, diffuser 6, the permanent dilution formula of secondary diluter 8; 18, blower fan 19, particle spectrometer 10, FSSP17 and PCASP15,3-6 air strainer 1 links to each other with the air intake opening of air chamber 2, and an end of forced-and-induced draft fan 3 links to each other with the gas outlet of air chamber 2; The other end of forced-and-induced draft fan 3 links to each other with diffuser 6 with burning zone 4 successively; Catalyst-assembly 5 is housed in burning zone 4, and burning zone 4 is equipped with pitot tube 20 and Temperature Humidity Sensor 31 respectively with diffuser 6, and pitot tube 20 links to each other with data acquisition single-chip microcomputer 33 respectively with Temperature Humidity Sensor 31.The air intake opening of the permanent dilution formula of first order diluter 8 links to each other with the gas outlet of diffuser 6; The gas outlet of the permanent dilution formula of first order diluter 18 links to each other with particle spectrometer 10 with the air intake opening of the second level permanent dilution formula diluter 18, and the gas outlet of the second level permanent dilution formula diluter 18 links to each other with PCASP15 with FSSP17, particle spectrometer 10.
As shown in Figure 2; The present invention also comprises: be contained in the jetting type diluter 16 between the gas outlet of PCASP15 and second level diluter 18; The sample gas air intake opening 21 that the front end of jetting type diluter 16 has; Jetting type diluter 16 leading portion sides have the compressed air inlet 22 of 1 group of above symmetry; The rear end of jetting type diluter 16 has thief hatch 25; Near the thief hatch 25 jetting type diluter 16 sides have gas outlet 24, and sample gas air intake opening 21 is equipped with jet draft tube 29, and compressed air inlet 22 links to each other with gas mass flow control box 12, moisture trap 11, pressure maintaining valve 13, air compressor 14 and air strainer 1 successively; On the jetting type diluter 16 of compressed air inlet 22 rear ends, jet ring 23 is housed; Jet ring 23 makes the high-speed air generation negative pressure that is got into by compressed air inlet 22 make sample gas be inhaled into the cavity of jetting type diluter by air intake opening 21 and fully mixes, and the thief hatch 25 of jetting type diluter 16 is equipped with PCASP sampling head 30, and PCASP sampling head 30 reaches before the gas outlet 24 in the jetting type diluter 16.
As shown in figures 1 and 3, the front end of permanent dilution formula diluter 8,18 has air intake opening; Sampling pipe 7 is contained on the air intake opening and extend in the perseverance dilution formula diluter 8,18 of air-diffuser 6 or upper level permanent dilution formula diluter 8; 18 leading portion side has filtered air inlet 28, and this air intake 28 links to each other with an air strainer 1, permanent dilution formula diluter 8; 18 rear end has the gas outlet, and expanded type sampling interface 9 is housed on the gas outlet.The central authorities of expanded type sampling interface 9 have a main thieff hatch 26; Have 4-8 expansion thieff hatch 27 on the circumference of expanded type sampling interface 9; The sampling pipe 7 of the permanent dilution formula of main thieff hatch 26 and next stage diluter 18 or the sampling pipe 7 that leads to FSSP17 link to each other, expand thieff hatch 27 and link to each other with particle spectrometer 10 and/or PCASP15 with blower fan 19.
Present embodiment is an example with two permanent dilution formula diluters only, and the dynamic wind-tunnel detection system of gasoloid of the present invention is described, and in fact, the dynamic wind-tunnel detection system of gasoloid of the present invention can also have 1 or 3 diluter.
The course of work:
When the dynamic wind-tunnel detection system of gasoloid of the present invention is worked; The pure air that each air strainer 1 obtains after with the inhaled air filtration, purification sucks burning zones 4 through forced-and-induced draft fan 3; Flame bar in the catalyst-assembly 5 in the burning zone 4 is lighted; The aerosol particle that produces blows to diffuser 6 by burning zone 4 because burning zone 4 inner wall smooths and be cylindrical, guarantee like this in the whole wind-tunnel air-flow stably central point remain unchanged.It is poor entirely on burning zone 4 and diffuser 6, to measure air-flows with pitot tube 20 respectively, after temperature, humidity and Mach number are corrected, obtains true velocity.The permanent dilution formula of first order diluter 8 in the connection of diffuser 6 afterbodys; Connect the second level permanent dilution formula diluter 18 in the permanent dilution formula of first order diluter 8 backs; With FSSP17 the outlet of the second level permanent dilution formula diluter 18 is sampled, at the front end adding jetting type diluter 16 of PCASP15, making particulate measure diameter range is 0.5～47 micron; 0.5～8.0 micron commonly used, 15 diameters at interval.Accurately detect the duty of aerocolloidal dynamic wind-tunnel through these results; So that generate the reference of demonstration as actual aerosol particle; Supply the real work operation to use; The maximum wind velocity of burning zone of the present invention reaches 120 meter per seconds, can simulate the flying speed of most of Weather modification operation aircrafts.Can simulate different wind speed under airborne condition, precisely measure the nuclear particle yardstick spectrum of the flame bar burning in the catalyst-assembly 5, and the adjustable scope of application of its wind speed extensively, be convenient to operation.
More than describing is to explanation of the present invention, is not that institute of the present invention restricted portion is referring to claim to the qualification of invention, and under the situation of spirit of the present invention, the present invention can do any type of modification.
Claims (7)
1. dynamic wind-tunnel detection system of gasoloid; It comprises: several air strainers (1), air chamber (2), forced-and-induced draft fan (3), burning zone (4), catalyst-assembly (5), diffuser (6), the permanent dilution formula of one-level diluter (8 at least; 18), blower fan (19), FSSP (17), PCASP (15) and particle spectrometer (10); 3-6 air strainer (1) links to each other with the air intake opening of air chamber (2); One end of forced-and-induced draft fan (3) links to each other with the gas outlet of air chamber (2); The other end of forced-and-induced draft fan (3) links to each other with diffuser (6) with burning zone (4) successively; Catalyst-assembly (5) is housed in burning zone (4); The air intake opening of permanent dilution formula diluter (8,18) links to each other with the gas outlet of diffuser (6) or the permanent dilution formula diluter of upper level (8), and the gas outlet of permanent dilution formula diluter (8) links to each other with the permanent dilution formula diluter of next stage (18); The permanent dilution formula diluter of next stage (18) links to each other with FSSP (17), PCASP (15) and particle spectrometer (10) respectively; It is characterized in that: it also comprises: be contained in the jetting type diluter (16) between the gas outlet of the permanent dilution formula diluter of PCASP (15) and final stage (18), and the sample gas air intake opening (21) that the front end of jetting type diluter (16) has, the leading portion side of jetting type diluter (16) has the compressed air inlet (22) of 1 group of above symmetry; The rear end of jetting type diluter (16) has thief hatch (25); Near the thief hatch (25) jetting type diluter (16) side has gas outlet (24), and sample gas air intake opening (21) is equipped with jet draft tube (29), and compressed air inlet (22) links to each other with gas mass flow control box (12), moisture trap (11), pressure maintaining valve (13), air compressor (14) and air strainer (1) successively; On the jetting type diluter (16) of compressed air inlet (22) rear end, jet ring (23) is housed; Jet ring (23) makes the high-speed air generation negative pressure by compressed air inlet (22) entering make sample gas be inhaled into the cavity of jetting type diluter and fully mixing by air intake opening (21), and the thief hatch (25) of jetting type diluter (16) is equipped with PCASP sampling head (30), and PCASP sampling head (30) reaches the interior gas outlet (24) of jetting type diluter (16) before.
2. the dynamic wind-tunnel detection system of gasoloid as claimed in claim 1 is characterized in that: the front end of said permanent dilution formula diluter (8,18) has sample gas inlet; Sampling pipe (7) is contained on the sample air intake opening and extend into the perseverance dilution formula diluter (8 of diffuser (6) or upper level; 18) in, the leading portion side of permanent dilution formula diluter (8,18) has a pair of above filtered air inlet (28); This air intake (28) links to each other with an air strainer (1); The rear end of permanent dilution formula diluter (8,18) has the gas outlet, and expanded type sampling interface (9) is housed on the gas outlet.
3. the dynamic wind-tunnel detection system of gasoloid as claimed in claim 2; It is characterized in that: the central authorities of described expanded type sampling interface (9) have a main thieff hatch (26); Have 4-8 expansion thieff hatch (27) on the disc of expanded type sampling interface (9); The sampling pipe (7) of the permanent dilution formula diluter of main thieff hatch (26) and next stage (18) or the sampling pipe (7) that leads to FSSP (17) link to each other, expand thieff hatch (27) and link to each other with PCASP (15) and/or particle spectrometer (10) with blower fan (19).
4. the dynamic wind-tunnel detection system of gasoloid as claimed in claim 3 is characterized in that: said permanent dilution formula diluter (8,18) is one-level, secondary or three grades of diluters.
5. the dynamic wind-tunnel detection system of gasoloid as claimed in claim 4; It is characterized in that: said permanent dilution formula diluter (8; 18) be the permanent dilution formula of secondary diluter (8; 18); The air intake opening of the permanent dilution formula diluter of the first order (8) links to each other with the gas outlet of diffuser (6), and the gas outlet of the permanent dilution formula diluter of the first order (18) links to each other with particle spectrometer (10) with the air intake opening of the permanent dilution formula diluter in the second level (18), and the gas outlet of the permanent dilution formula diluter in the second level (18) links to each other with FSSP (17), particle spectrometer (10) and PCASP (15).
6. the dynamic wind-tunnel detection system of gasoloid as claimed in claim 5 is characterized in that: said particle spectrometer (10) is engine exhaust emission particle particle diameter spectrometer, aerodynamic size spectrometer or cloud condensation nucl counter.
7. the dynamic wind-tunnel detection system of gasoloid as claimed in claim 6; It is characterized in that: said burning zone (4) and diffuser (6) all are equipped with pitot tube (20) and Temperature Humidity Sensor (31), and pitot tube (20) links to each other with data acquisition single-chip microcomputer (33) respectively with Temperature Humidity Sensor (31).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101801519A CN102053048B (en) | 2009-11-09 | 2009-11-09 | Dynamic aerosol wind tunnel detection system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101801519A CN102053048B (en) | 2009-11-09 | 2009-11-09 | Dynamic aerosol wind tunnel detection system |
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| CN102053048A CN102053048A (en) | 2011-05-11 |
| CN102053048B true CN102053048B (en) | 2012-07-25 |
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| CN2009101801519A Expired - Fee Related CN102053048B (en) | 2009-11-09 | 2009-11-09 | Dynamic aerosol wind tunnel detection system |
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| US10883910B2 (en) | 2014-10-18 | 2021-01-05 | Aerosol Dynamics Inc. | Coiled system for condensational growth of ultrafine particles |
| DE112015004688T5 (en) | 2014-10-18 | 2018-01-18 | Aerosol Dynamics Inc. | Persistent supersaturations for condensation growth of particles |
| CN104677700B (en) * | 2015-03-17 | 2018-02-13 | 天津市环境监测中心 | The sampling system that fine particle gathers a kind of flue gas containing drop suitable for stationary source |
| CN106525518B (en) * | 2016-12-29 | 2020-07-07 | 中国环境科学研究院 | Airborne sampling system capable of automatically changing pressure of sampling system and application thereof |
| CN106596201B (en) * | 2016-12-29 | 2020-07-07 | 中国环境科学研究院 | Airborne sampling head capable of preventing water vapor from condensing and application thereof |
| CN106596200B (en) * | 2016-12-29 | 2020-07-07 | 中国环境科学研究院 | Airborne sampling head capable of preventing water from flowing backwards and application thereof |
| CN106769251B (en) * | 2016-12-29 | 2020-07-31 | 中国环境科学研究院 | Automatic sampling system and application thereof |
| CN109596482A (en) * | 2018-12-28 | 2019-04-09 | 复旦大学 | A kind of atmospheric aerosol smog system measuring particulate matter chemical constituent |
| CN112999989B (en) * | 2021-03-05 | 2021-11-12 | 北京航空航天大学 | Black carbon aerosol generator |
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| CN1233759A (en) * | 1998-04-24 | 1999-11-03 | 中国科学院上海光学精密机械研究所 | Incoherent laser radar system for detecting atmosphere |
| US6584865B1 (en) * | 2001-03-08 | 2003-07-01 | The United States Of America As Represented By The Secretary Of The Army | Absolute reference aerosol sampler |
| CN101441145A (en) * | 2008-12-25 | 2009-05-27 | 中国气象科学研究院 | Dynamic detection wind tunnel of air line type stepless speed regulating aerosol |
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