CN210953314U - Wind tunnel test device for simulating increase and regression of concentration of fine air particles - Google Patents
Wind tunnel test device for simulating increase and regression of concentration of fine air particles Download PDFInfo
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- CN210953314U CN210953314U CN201921626536.9U CN201921626536U CN210953314U CN 210953314 U CN210953314 U CN 210953314U CN 201921626536 U CN201921626536 U CN 201921626536U CN 210953314 U CN210953314 U CN 210953314U
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- 238000012360 testing method Methods 0.000 title claims abstract description 46
- 239000002245 particle Substances 0.000 title claims abstract description 19
- 238000005070 sampling Methods 0.000 claims abstract description 58
- 239000000443 aerosol Substances 0.000 claims description 20
- 239000003738 black carbon Substances 0.000 claims description 20
- 239000004809 Teflon Substances 0.000 claims description 13
- 229920006362 Teflon® Polymers 0.000 claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000010419 fine particle Substances 0.000 abstract description 23
- 238000000034 method Methods 0.000 abstract description 13
- 239000003570 air Substances 0.000 description 30
- 239000007789 gas Substances 0.000 description 21
- 238000004088 simulation Methods 0.000 description 15
- 239000013618 particulate matter Substances 0.000 description 7
- 238000011160 research Methods 0.000 description 6
- 230000003068 static effect Effects 0.000 description 4
- 239000012080 ambient air Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000013101 initial test Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to a wind tunnel test device for simulating the increase and decrease of the concentration of fine air particles, which comprises a backflow boundary layer wind tunnel, a baffle, a temporary observation room and an online observation instrument, wherein the wind tunnel comprises an inlet section, a power section, a test section and an outlet section; the inlet section is provided with an inlet valve, the outlet section is provided with an exhaust valve, the power section is provided with a fan, the number of the baffles is two, and the two baffles are detachably arranged at the two ends of the test section respectively; the room is located backward flow formula boundary layer wind-tunnel outside temporarily, on-line observation instrument is located the room of temporarily observing, be equipped with the sampling head between the two intrinsic baffles of test section, the sampling head passes through the pipeline and is connected with on-line observation instrument, the utility model discloses a process that the fine particle increases and regresses in the wind-tunnel simulated environment air does not receive external wind speed or boundary layer altitude variation's influence.
Description
Technical Field
The utility model relates to a simulation method of fine particles concentration rapid change in the ambient atmosphere, concretely relates to wind tunnel test simulation method that fine particles concentration increases and fades away in the ambient air.
Background
China has evolved from urban pollution to regional and compound atmospheric pollution, and haze weather is frequent. In 2013, Jingjin Ji and Yangtze triangle areas have severe haze pollution for several times, which arouses the consistent attention of government departments and the public. The essence of the haze is high-concentration atmospheric fine particles (such as PM) generated by atmospheric combined pollution2.5、PM1) The atmospheric visibility is drastically reduced due to its matting effect. The generation and rapid growth of the fine particles are the key to frequent heavy haze events, so that the process of rapid growth and elimination of the fine particles can be simulated, and the research on the causative mechanism and regulation of haze is important.
At present, the research means for the characteristic change of fine particles mainly comprises direct field observation and static smoke box simulation. The field observation operation is convenient, but the field observation operation is easily influenced by various other external factors such as the wind speed, the boundary layer height, the illumination intensity and the like, certain interference is generated on the research result, and the observation result cannot be repeatedly obtained. Static box simulation can be used for control experiments, but due to volume limitation and simulation condition limitation, real atmospheric environment cannot be simulated accurately, and the wall loss can also influence the test result. At present, no method can simulate the change process of the concentration of fine particles in the air of the natural environment.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the problem that exists among the prior art, provide a wind tunnel test simulation method that the fine particle increases and fades away in the simulation environment air, can avoid traditional on-the-spot observation or static case simulation fine particle characteristic limitation and the uncertainty that brings.
In order to achieve the above object, the utility model provides a technical scheme does: a wind tunnel test device for simulating the increase and the regression of the concentration of fine air particles comprises a backflow boundary layer wind tunnel, a baffle, a temporary observation room and an online observation instrument, wherein the wind tunnel comprises an inlet section, a power section, a test section and an outlet section; the inlet section is provided with an inlet valve, the outlet section is provided with an exhaust valve, the power section is provided with a fan, the number of the baffles is two, and the two baffles are detachably arranged at the two ends of the test section respectively; the temporary observation room is located outside the wind tunnel of the backflow type boundary layer, the online observation instrument is located inside the temporary observation room, a sampling head is arranged between the two baffles in the test section, and the sampling head is connected with the online observation instrument through a pipeline.
The technical scheme is further designed as follows: the device also comprises a small weather station which is positioned in the test section and between the two baffles.
The online observation instrument comprises a pollution gas observation instrument and PM2.5An on-line monitor and a black carbon aerosol mass spectrometer.
The sampling head comprises a first sampling head, a second sampling head and an atmosphere sampling header pipe, wherein the first sampling head and the PM are arranged2.5The on-line monitoring instrument is connected, the second sampling head is connected with the black carbon aerosol mass spectrometer, and the atmospheric sampling main pipe is connected with the polluted gas observation instrument.
The first sampling head, the second sampling head and the atmosphere sampling header pipe are arranged at the same height.
The PM2.5The front end of the on-line monitor is connected with a first sampling head through a Teflon air inlet pipe, a first external sampling pump is arranged at the rear end of the on-line monitor, and a first cyclone cutter is arranged at an air inlet of the first sampling head.
The black carbon aerosol mass spectrometer is connected with the second sampling head through a Teflon air inlet pipe, and a silica gel drying pipe is arranged between an inlet of the black carbon aerosol mass spectrometer and the Teflon air inlet pipe; and a second cyclone cutter is arranged at the air inlet of the second sampling head.
The polluted gas observation instrument is connected with an atmospheric sampling main pipe through a Teflon pipe, and a second external sampling pump is arranged at the rear end of the polluted gas observation instrument.
An air conditioner is arranged in the temporary observation room.
The temporary observation house is also internally provided with a first computer and a second computer, and the PM2.5The on-line monitor 7 and the polluted gas observer 14 are connected with a first computer; the black carbon aerosol mass spectrometer is connected with a second computer.
Compared with the prior art, the utility model beneficial effect who has does:
the utility model provides a direct and effectual device comes the process that the fine particle increases and subsides in the simulation ambient air, does not receive external wind speed or boundary layer altitude variation's influence, need not artificial joining pollution sources, can truly reflect the atmospheric pollution characteristic around experimental ground, and the physicochemical process of research air fine particle evolution that can be fine provides reliable data support for relevant scientific research personnel and research department.
Drawings
Fig. 1 is a schematic view of a wind tunnel structure in an embodiment of the utility model;
fig. 2 is a schematic structural view of the test section and the temporary observation room in the embodiment of the utility model.
In the figure: 1. the device comprises a backflow boundary layer wind tunnel, 2, an inlet valve, 3, a fan, 4, a test section, 5, an exhaust valve, 6, a temporary observation room, 7, a PM2.5 online monitor, 8, a VSCC (VSCC) cyclone cutter, 9, an external sampling pump of the PM2.5 online monitor, 10, a black carbon aerosol mass spectrometer, 12, 2000-30EHB (ultra high temperature) cyclone cutter, 12, a silica gel drying tube, 13, a baffle, 14, a polluted gas observation instrument, 15, an external sampling pump of the polluted gas observation instrument, 16, an atmospheric sampling header pipe, 17, a first computer, 18, a second computer, 19 and a small meteorological station.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Examples
As shown in fig. 1 and fig. 2, the wind tunnel test device for simulating the increase and decrease of the concentration of the fine air particles of the embodiment includes a backflow boundary layer wind tunnel 1, a temporary observation house 6, and a PM2.5The system comprises an online monitor 7, a black carbon aerosol mass spectrometer 10, a baffle 13, a polluted gas observer 14 and a small meteorological station 19.
The backflow type boundary layer wind tunnel 1 comprises an air inlet section, a power section, a test section 4 and an air outlet section, wherein an inlet valve 2 is arranged at the inlet section, an exhaust valve 5 is arranged at the outlet section, a fan 3 is arranged at the power section, and the inlet section and the outlet section are respectively communicated with the test section 4. PM (particulate matter)2.5The on-line monitor 7, the black carbon aerosol mass spectrometer 10 and the pollution gas observer 14 are allIs arranged in the temporary observation house 6; the temporary observation room is arranged outside the test section 4 and is positioned below the vertical position of the center of the test section 4, and a refrigeration type air conditioner is arranged in the temporary observation room 6 to ensure that various observation instruments run at moderate temperature.
Baffle 13 is the teflon baffle in this embodiment, and is equipped with two, and two baffles 13 are detachable respectively and set up in 4 both ends of test section, and baffle 13 can be sealed test section 4 for airtight space. A small meteorological station 19, an atmosphere sampling header pipe 16, a first sampling head and a second sampling head are arranged between the two baffles 13 in the test section 4, and the small meteorological station 19 is used for assisting in recording meteorological factors such as temperature, humidity, wind speed and air pressure; the atmospheric sampling manifold 16, the first sampling head and the second sampling head are disposed at the same height.
PM2.5The online monitor 7, the black carbon aerosol mass spectrometer 10 and the pollution gas observer 14 are divided into three paths to independently sample particulate matters and gas in the air; PM (particulate matter)2.5The front end of the on-line monitor 7 is connected with a first sampling head through a Teflon air inlet pipe, the rear end of the on-line monitor is provided with a first external sampling pump 9, and a VSCC cyclone cutter 8 is arranged at an air inlet of the first sampling head; the black carbon aerosol mass spectrometer 10 is connected with the second sampling head through a Teflon air inlet pipe, and a silica gel drying pipe 12 is arranged between an inlet of the black carbon aerosol mass spectrometer 10 and the Teflon air inlet pipe and used for ensuring that sampling samples are all particles; and a 2000-30EHB cyclone cutter 11 is arranged at the air inlet of the second sampling head. The two cyclone cutters are used for ensuring that collected samples are fine particles (the kinetic diameter is less than or equal to 2.5 mu m). The polluted gas observation instrument 14 is provided with a plurality of polluted gas observation instruments 14, the plurality of polluted gas observation instruments 14 are respectively used for monitoring different polluted gases, the air inlets of the plurality of polluted gas observation instruments 14 are connected with the atmospheric sampling header pipe 16 after being collected through the Teflon pipe, and the rear ends of the plurality of polluted gas observation instruments 14 are respectively provided with an external sampling pump 15 of the polluted gas observation instrument.
In the present embodiment, a first computer 17 and a second computer 18 are further provided in the temporary observation room 6, and PM2.5The data collected by the on-line monitor 7 and the pollution gas observer 14 are connected to a first computer 17; the data collected by the black carbon aerosol mass spectrometer 10 is connected to a second computer 18.
PM in the present embodiment2.5The online monitor 7 adopts a BAM1020 model of Met One company in America, and the external sampling pump is a model 0523-101Q-G588DX of GAST company in America; the black carbon aerosol mass spectrometer 10 was of the SP-AMS type available from Aerodyne, USA.
The wind tunnel test for simulating the increase and the regression of the concentration of the fine air particles by using the device of the embodiment comprises the following steps:
opening an inlet valve 2 and a power section fan 3 of a backflow type boundary layer wind tunnel 1, introducing air into a test section 4 from an inlet section, closing the power section fan 3 and the inlet valve 2 after the air is uniformly mixed, and sealing two ends of the test section 4 by using a baffle 13 to form a closed space for the test section 4.
Step two, opening PM2.5The online monitor 7 and the black carbon aerosol mass spectrometer 10 record the initial value of the fine particle concentration and monitor the change of the air fine particle concentration, and the fine particle concentration can continuously rise at the moment.
And step three, when the concentration of the fine particles does not rise any more, removing the baffles 13 at the two ends of the test section 4, and opening the air inlet valve 2, the power section fan 3 and the exhaust valve 5 of the backflow type boundary layer wind tunnel 1 to replace the air in the test section 4, wherein the concentration of the fine particles is continuously reduced.
Step four, waiting for PM2.5When the fine particle concentrations monitored by the on-line monitor 7 and the black carbon aerosol mass spectrometer 10 are recovered to the initial test value and are stable, the next simulation test can be repeatedly carried out.
The utility model discloses use backward flow formula boundary layer wind-tunnel to simulate fine particle concentration change process, because backward flow formula boundary layer wind-tunnel volume is great, can better reflect the real atmospheric pollution condition, can control the wind speed size of wind-tunnel test section again, get rid of the influence of wind speed and boundary layer altitude variation, can better simulation atmosphere chemical process, the simulation effect of than static smog case is better. The utility model discloses a set up baffle 13 at 4 both ends of wind-tunnel test section and can form airtight space in the wind-tunnel, the process that the fine particle increases in the simulation ambient air opens the process that the fine particle subsides in the baffle can the simulation air, and the influence that the wind speed subsides to the fine particle is judged to the in-process accessible regulation fan rotational speed of subsiding in the simulation.
The data observed by several pollution gas observers 14 can be used to analyze the cause of particle growth, whether it originates from gas particle conversion, etc.
The technical scheme of the utility model is not limited to above-mentioned each embodiment, and the technical scheme that all adopt to equate substitution mode to obtain all falls the utility model discloses the within range that claims.
Claims (10)
1. A wind tunnel test device for simulating the increase and the regression of the concentration of fine air particles is characterized in that: the device comprises a backflow type boundary layer wind tunnel, a baffle, a temporary observation room and an online observation instrument, wherein the wind tunnel comprises an inlet section, a power section, a test section and an outlet section; the inlet section is provided with an inlet valve, the outlet section is provided with an exhaust valve, the power section is provided with a fan, the number of the baffles is two, and the two baffles are detachably arranged at the two ends of the test section respectively; the temporary observation room is located outside the wind tunnel of the backflow type boundary layer, the online observation instrument is located inside the temporary observation room, a sampling head is arranged between the two baffles in the test section, and the sampling head is connected with the online observation instrument through a pipeline.
2. A wind tunnel test device for simulating the increase and decrease of the concentration of fine air particles according to claim 1, wherein: still include small-size weather station, small-size weather station is located experimental section and is located between two baffles.
3. A wind tunnel test device for simulating the increase and decrease of the concentration of fine air particles according to claim 2, wherein: the online observation instrument comprises a pollution gas observation instrument and PM2.5An on-line monitor and a black carbon aerosol mass spectrometer.
4. A wind tunnel test device for simulating the increase and decrease of the concentration of fine air particles according to claim 3, wherein: the sampling head comprises a first sampling head, a second sampling head and an atmosphere sampling header pipe, wherein the first sampling head and the PM are arranged2.5The on-line monitoring instrument is connected, the second sampling head is connected with the black carbon aerosol mass spectrometer, and the atmospheric sampling main pipe is connected with the polluted gas observation instrument.
5. A wind tunnel test device for simulating the increase and decrease of the concentration of fine air particles according to claim 4, wherein: the first sampling head, the second sampling head and the atmosphere sampling header pipe are arranged at the same height.
6. A wind tunnel test device for simulating the increase and decrease of the concentration of fine air particles according to claim 5, wherein: the PM2.5The front end of the on-line monitor is connected with a first sampling head through a Teflon air inlet pipe, a first external sampling pump is arranged at the rear end of the on-line monitor, and a first cyclone cutter is arranged at an air inlet of the first sampling head.
7. A wind tunnel test device for simulating the increase and decrease of the concentration of fine air particles according to claim 6, wherein: the black carbon aerosol mass spectrometer is connected with the second sampling head through a Teflon air inlet pipe, and a silica gel drying pipe is arranged between an inlet of the black carbon aerosol mass spectrometer and the Teflon air inlet pipe; and a second cyclone cutter is arranged at the air inlet of the second sampling head.
8. A wind tunnel test device for simulating the increase and decrease of concentration of fine air particles according to claim 7, wherein: the polluted gas observation instrument is connected with an atmospheric sampling main pipe through a Teflon pipe, and a second external sampling pump is arranged at the rear end of the polluted gas observation instrument.
9. A wind tunnel test device for simulating the increase and decrease of concentration of fine air particles according to claim 8, wherein: an air conditioner is arranged in the temporary observation room.
10. A wind tunnel test device for simulating the increase and decrease of concentration of fine air particles according to claim 9, wherein: a first computer and a second computer are also arranged in the temporary observation roomThe PM2.5The on-line monitor and the polluted gas observation instrument are connected with a first computer; the black carbon aerosol mass spectrometer is connected with a second computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921626536.9U CN210953314U (en) | 2019-09-27 | 2019-09-27 | Wind tunnel test device for simulating increase and regression of concentration of fine air particles |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921626536.9U CN210953314U (en) | 2019-09-27 | 2019-09-27 | Wind tunnel test device for simulating increase and regression of concentration of fine air particles |
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| CN210953314U true CN210953314U (en) | 2020-07-07 |
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| CN201921626536.9U Withdrawn - After Issue CN210953314U (en) | 2019-09-27 | 2019-09-27 | Wind tunnel test device for simulating increase and regression of concentration of fine air particles |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110530596A (en) * | 2019-09-27 | 2019-12-03 | 国电环境保护研究院有限公司 | The flow tunnel testing device and method that simulated air fine particle concentration increases and subsides |
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2019
- 2019-09-27 CN CN201921626536.9U patent/CN210953314U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110530596A (en) * | 2019-09-27 | 2019-12-03 | 国电环境保护研究院有限公司 | The flow tunnel testing device and method that simulated air fine particle concentration increases and subsides |
| CN110530596B (en) * | 2019-09-27 | 2024-09-03 | 国电环境保护研究院有限公司 | Wind tunnel test device and method for simulating air fine particle concentration increase and decrease |
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Granted publication date: 20200707 Effective date of abandoning: 20240903 |