CN106290088A - A kind of particulate matter of measuring is deposited in experimental provision and the method for aircraft heat exchanger - Google Patents
A kind of particulate matter of measuring is deposited in experimental provision and the method for aircraft heat exchanger Download PDFInfo
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- CN106290088A CN106290088A CN201610880889.6A CN201610880889A CN106290088A CN 106290088 A CN106290088 A CN 106290088A CN 201610880889 A CN201610880889 A CN 201610880889A CN 106290088 A CN106290088 A CN 106290088A
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- 239000013618 particulate matter Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 18
- 239000000443 aerosol Substances 0.000 claims abstract description 13
- 230000007613 environmental effect Effects 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 238000004062 sedimentation Methods 0.000 claims abstract description 9
- 238000005070 sampling Methods 0.000 claims description 37
- 238000004378 air conditioning Methods 0.000 claims description 14
- 239000012528 membrane Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 7
- 230000003189 isokinetic effect Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000000700 radioactive tracer Substances 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 235000013339 cereals Nutrition 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- LLQPHQFNMLZJMP-UHFFFAOYSA-N Fentrazamide Chemical compound N1=NN(C=2C(=CC=CC=2)Cl)C(=O)N1C(=O)N(CC)C1CCCCC1 LLQPHQFNMLZJMP-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/04—Investigating sedimentation of particle suspensions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0272—Investigating particle size or size distribution with screening; with classification by filtering
Abstract
The invention discloses a kind of particulate matter of measuring and be deposited in experimental provision and the method for aircraft heat exchanger, the oiliness particulate matter that air in laboratory is sent with aerosol generator after first passing through high efficiency particulate air filter is sufficiently mixed in blending bin so that it is keep even concentration；The air of mixing is through one section of airduct, after becoming fully developed turbulent flow, deliver in the sampled upstream case of heat exchanger, subsequently enter in target aircraft heat exchanger to be measured, then, in air enters back into sampled downstream case, it is discharged to outside laboratory finally by centrifugal fan.Apparatus and method of the present invention convenient can measure heat exchanger endoparticle thing sedimentation rate fast and accurately, for the operation maintenance of heat exchanger in aircraft environmental control system provide reliably by way of.
Description
Technical field
The invention belongs to close space air quality and dispersion of pollutants field, be specifically related to a kind of survey aircraft environment control
The experimental provision of the heat exchanger particulate matter sedimentation rate in system processed and method.
Background technology
The environmental control system of airline carriers of passengers plays one in the cabin environment that offer one safety and Health of passenger is comfortable
Important role.The air sending into cabin has half from outdoor fresh air, second half from cabin through efficient mistake
The cleaned air that filter filters.Wherein the fresh air great majority at present from outdoor are by engine system or and electromotor
Similar accessory power system enters plane environmental control system, is fitted without high efficiency particulate air filter, and particulate matter enters air-conditioning
Bao Zhonghui affects efficiency of heat exchanger, therefore the pollution condition of airport air and aircraft in the time of staying on ground to aircraft ring
Border control system has a great impact.
Five big airport (Beijing, PVG, Hongqiao in Shanghai, Guangzhou, Shenzhen) atmospheric pollution that China is main at present are serious,
Suspended particulate substance PM2.5 and PM10 in air has exceeded the standard of World Trade Organization.On the other hand, the flight of China is delayed
Situation is the severeest.Showing according to Flightstats (2014) website statistics, China's three big main airports punctuality rates are only
Having 30%, close hatch door from aircraft and start between actual taking off, passenger averagely needs the time waited to be up to 40 minutes.
Severe contamination and the required waiting time on ground of Chinese Airport air are oversize, result in substantial amounts of
Grain thing can enter the air-conditioning bag in plane environmental control system, and has part to settle in heat exchanger within air-conditioning systems, significantly
Reducing its heat exchange efficiency, efficiency of heat exchanger reduction can make aircraft great aviation accident occur.
Current research both at home and abroad shows, particulate matter airduct in building system and heat exchanger sedimentation rate a large amount of literary compositions
Offer, be plate-fin heat exchanger yet with the heat exchanger structure in aircraft, this and the very much not phase of the heat exchanger structure in building system
With.Therefore, particulate matter sedimentation rate in aircraft heat exchanger of research different-grain diameter, build an experiment dress that can accurately measure
Put, by the data analysis obtained and take corresponding solution to ensure its safe operation and efficiency are necessary.
Summary of the invention
In order to solve problems of the prior art, the present invention provides a kind of particulate matter of measuring to be deposited in aircraft heat exchanger
Experimental provision and method, overcome the pollution condition of airport air in prior art and aircraft in the time of staying on ground to flying
The problem of machine environmental control system impact.
The technical solution used in the present invention is: a kind of particulate matter of measuring is deposited in the experimental provision of aircraft heat exchanger, experiment
The oiliness particulate matter that air in room is sent with aerosol generator after first passing through high efficiency particulate air filter is carried out in blending bin
It is sufficiently mixed so that it is keep even concentration；The air of mixing is through one section of airduct so that it is after becoming fully developed turbulent flow, deliver to
In the sampled upstream case of heat exchanger, gasoloid instrument is connected with sampled upstream case, uses gasoloid instrument to determine institute
Sending out the size in grit footpath, subsequently enter in target aircraft heat exchanger to be measured, then air enters back into sampled downstream case
In, it is discharged to outside laboratory finally by centrifugal fan.
Volume in blending bin is greater than air mass flow and uses the wind pushing form of " above sending down ".
The experimental system of whole measurement is carried out under negative pressure state, experimental provision in addition to above-mentioned aerosol generator, portion
Connection between part and parts is and is tightly connected.
Described sampling box is to make of acrylic material.
The subsidiary filter membrane of sampling head in said two sampling box realizes isokinetic sampling in sampling box.
A kind of measure the method that particulate matter is deposited in aircraft heat exchanger, comprise the following steps:
(1) determine the air output of cockpit by searching ASHARE handbook, fly shared by this air output and passenger cabin
The air output of the whole plane environmental control system of ratio-dependent of machine environmental control system air output, owing to aircraft has two air-conditionings
System, so the air output of each air-conditioning bag is it was determined that according to being processed by air-conditioning and the ratio of bypath air flow, come
Determine the heat exchanger flow in air-conditioning bag, finally obtain the import mean flow rate of heat exchanger；
(2) experimental provision described in claim 1 is built for the particulate matter settling amount in survey aircraft heat exchanger；
(3) SF is utilized6Tracer gas technique measures the air quantity of system, uses variable frequency adjustment device to regulate fan delivery to reach
Operating mode in step (1)；
(4) use simple grain footpath aerosol generator to carry out sending out dirt, can send from 1 under different temperature heating condition
To the oiliness granule of 8 microns；
(5) gasoloid instrument is used to determine the size in sent out grit footpath；
(6) upstream and downstream at heat exchanger installs sampling head, and measures the speed of thief hatch with heat bulb；
(7) utilize the principle of isokinetic sampling, use mass flow controller regulation vacuum pump flow rate, it is ensured that adopting of sampling head
Sample speed keeps consistent with the speed in step (5)；
(8) quality before and after using electronic analytical balance to measure the filter membrane sampling in sampling head, obtains the weightening finish of filter membrane, from
And obtain heat exchanger upstream and downstream particle concentration, final acquisition particulate matter sedimentation rate in heat exchanger.
The invention has the beneficial effects as follows: apparatus and method of the present invention convenient can measure interior of heat exchanger fast and accurately
Grain thing sedimentation rate, for the operation maintenance of heat exchanger in aircraft environmental control system provide reliably by way of.
Accompanying drawing explanation
Accompanying drawing 1 is experiment device schematic diagram of the present invention；
Accompanying drawing 2 is 3000 dirt explanatory diagrams of aerosol generator MAG of the inventive method；
Accompanying drawing 3 is 1 micron, 2.5 microns, 5 microns and the 8 micron grain size scattergrams that the inventive method records；
Wherein: 1, high efficiency particulate air filter；2, aerosol generator；3, blending bin；4, airduct；5, sampled upstream case；6, heat exchange
Device；7, sampled downstream case；8, blower fan；9, sampling head；10, gasoloid instrument.
Detailed description of the invention
Describe the present invention with detailed description of the invention below in conjunction with the accompanying drawings.
The testing stand of the present invention is as it is shown in figure 1, air in laboratory is sent out with aerosol after first passing through high efficiency particulate air filter 1
The oiliness particulate matter that raw device 2 (MAG 3000) is sent is sufficiently mixed in blending bin 3 so that it is keep even concentration.For
Ensureing that the particulate matter in blending bin 3 can be sufficiently mixed with air, the volume in blending bin 3 is greater than air mass flow and adopts
Wind pushing form with " above sending down ".Then the air mixed is through airduct 4 that a segment length is 1.2m so that it is become fully developed
After turbulent flow, deliver in the sampled upstream case 5 of heat exchanger 6, subsequently enter in target aircraft heat exchanger to be measured, then empty
Gas enters back in sampled downstream case 7, is discharged to outside laboratory finally by centrifugal fan 8.The experimental system of whole measurement is
Carry out under negative pressure state, this is because aerosol generator MAG 3000 instrument can only under conditions of normal atmosphere (An)
Monodispersed particulate matter can be sent.Therefore, the particulate matter that MAG 3000 sends is not directly to be tightly connected with laboratory table, but
By experimental system, particulate matter is pumped in experimental provision.Sampling box is to make of acrylic material, and this material has non-quiet
Electrically, to prevent, particulate matter is charged causes error to experimental result.Experimental provision in addition to above-mentioned MAG 3000, parts and parts
Between connection be and be tightly connected.
The technology of the present invention to be embodied as step as follows:
Step 1, determines the air output of cockpit, shared by this air output and passenger cabin by searching ASHARE handbook
The air output of the whole plane environmental control system of ratio-dependent of plane environmental control system air output, owing to aircraft has two skies
Adjusting system, so the air output of each air-conditioning bag may determine that.According to being processed by air-conditioning and the ratio of bypath air flow,
Determine the heat exchanger flow in air-conditioning bag, finally obtain the import mean flow rate of heat exchanger.
Step 2, builds laboratory table according to operating mode determined by step 1, and Fig. 1 is experimental provision system diagram.
Step 3, utilizes SF6The air quantity of system measured by search gas and INNOVA gas concentration measurement instrument device, uses frequency conversion
Actuator regulates fan delivery with the operating mode reaching in step 1.
Step 4, varies with temperature figure according to 3000 grit footpaths of the MAG in Fig. 2, and test sends different every time
The aerosol of grain particle diameter.
Step 5, is placed on sampling head in sampling box, it is ensured that sampling mouth faces air-flow direction, then seals and adopts
Sample case ensures that it can not leak out.
Step 5, uses gasoloid instrument (APS 3321) 10 to determine the size in sent out grit footpath；Open blower fan,
Under conditions of ensureing that whole system is not leaked out, the thief hatch of gasoloid instrument APS 3321 is placed upstream in FIG
In sampling box, opening instrument and measure the particle diameter of particulate matter, the sampling time is 5 minutes, measurement result be given 1 micron, 2.5 micro-
Rice, 5 microns and 8 microns, as shown in Figure 3.
Step 6, closes gasoloid instrument APS 3321, uses heat bulb to measure upstream and downstream thief hatch
Flow velocity, and according to flow relocity calculation sampling flow under the conditions of isokinetic sampling.
Step 7, uses electronic analytical balance to measure the weight of filter membrane, opens sampling box, be arranged on by filter membrane and adopt after record
In sample head, sampling head is placed in sampling box, it is ensured that thief hatch faces air-flow direction.
Step 8, opens mass flow controller and vacuum pump regulation sampling flow, it is ensured that upstream and downstream reaches required
Sampling check flow.
Step 9, starts experiment, and the sampling time is 1 hour, samples in downstream, heat exchanger upstream simultaneously.
Step 10, closes blower fan, aerosol generator, vacuum pump and mass flow controller after 1 hour.By upstream and under
Filter membrane in trip sampling head takes out and uses electronic analytical balance to measure weight.
Step 11, gain in weight and upstream and downstream sampling flow according to heat exchanger upstream and downstream filter membrane are calculated up and down
Trip particle concentration, thus obtain this particles thing sedimentation rate at heat exchanger.
Step 12, repeats step 3-10, may finally obtain the different diameter airborne particle sedimentation rate at heat exchanger.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (6)
1. measure particulate matter and be deposited in the experimental provision of aircraft heat exchanger for one kind, it is characterised in that the air in laboratory is first
It is sufficiently mixed in blending bin by the oiliness particulate matter sent with aerosol generator after high efficiency particulate air filter so that it is protect
Hold even concentration；The air of mixing is through one section of airduct so that it is after becoming fully developed turbulent flow, deliver to the sampled upstream of heat exchanger
In case, gasoloid instrument is connected with sampled upstream case, uses gasoloid instrument to determine the size in sent out grit footpath, with
In the target aircraft heat exchanger that rear entrance is to be measured, in then air enters back into sampled downstream case, finally by centrifugal
Blower fan is discharged to outside laboratory.
Measure particulate matter the most according to claim 1 and be deposited in the experimental provision of aircraft heat exchanger, it is characterised in that blending bin
In volume be greater than air mass flow and use the wind pushing form of " above sending down ".
Measure particulate matter the most according to claim 1 and be deposited in the experimental provision of aircraft heat exchanger, it is characterised in that whole survey
The experimental system of amount is carried out under negative pressure state, and experimental provision is in addition to above-mentioned aerosol generator, between parts and parts
Connect to be and be tightly connected.
Measure particulate matter the most according to claim 1 and be deposited in the experimental provision of aircraft heat exchanger, it is characterised in that described in adopt
Sample case is to make of acrylic material.
Measure particulate matter the most according to claim 1 and be deposited in the experimental provision of aircraft heat exchanger, it is characterised in that described two
The subsidiary filter membrane of sampling head in individual sampling box realizes isokinetic sampling in sampling box.
6. measure the method that particulate matter is deposited in aircraft heat exchanger for one kind, it is characterised in that comprise the following steps: (1) is by looking into
Look for ASHARE handbook to determine the air output of cockpit, blow according to plane environmental control system shared by this air output and passenger cabin
The air output of the whole plane environmental control system of ratio-dependent of amount, owing to aircraft has two air conditioning systems, so each air-conditioning
The air output of bag is it was determined that according to being processed by air-conditioning and the ratio of bypath air flow, determine changing in air-conditioning bag
Hot device flow, finally obtains the import mean flow rate of heat exchanger；
(2) experimental provision described in claim 1 is built for the particulate matter settling amount in survey aircraft heat exchanger；
(3) SF is utilized6Tracer gas technique measures the air quantity of system, uses variable frequency adjustment device to regulate fan delivery to reach step
(1) operating mode in；
(4) use simple grain footpath aerosol generator to carry out sending out dirt, can send from 1 to 8 under different temperature heating condition
The oiliness granule of micron；
(5) gasoloid instrument is used to determine the size in sent out grit footpath；
(6) upstream and downstream at heat exchanger installs sampling head, and measures the speed of thief hatch with heat bulb；
(7) utilize the principle of isokinetic sampling, use mass flow controller regulation vacuum pump flow rate, it is ensured that the sampling speed of sampling head
Spend and keep consistent with the speed in step (5)；
(8) quality before and after using electronic analytical balance to measure the filter membrane sampling in sampling head, obtains the weightening finish of filter membrane, thus obtains
To heat exchanger upstream and downstream particle concentration, final acquisition particulate matter sedimentation rate in heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610880889.6A CN106290088A (en) | 2016-10-09 | 2016-10-09 | A kind of particulate matter of measuring is deposited in experimental provision and the method for aircraft heat exchanger |
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| CN201610880889.6A CN106290088A (en) | 2016-10-09 | 2016-10-09 | A kind of particulate matter of measuring is deposited in experimental provision and the method for aircraft heat exchanger |
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Cited By (3)
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| CN109406329A (en) * | 2017-08-17 | 2019-03-01 | 中国石油化工股份有限公司 | Measure the suspension method of fluid-bed heat exchanger tubulation endoparticle distribution |
| CN110595966A (en) * | 2019-09-30 | 2019-12-20 | 天津大学 | Real-time measurement cabin for monitoring wall surface oil mist deposition characteristics |
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