CN107271331A - A kind of measuring method of pipe tobacco to main flume flow resistance coefficient - Google Patents
A kind of measuring method of pipe tobacco to main flume flow resistance coefficient Download PDFInfo
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- CN107271331A CN107271331A CN201710560756.5A CN201710560756A CN107271331A CN 107271331 A CN107271331 A CN 107271331A CN 201710560756 A CN201710560756 A CN 201710560756A CN 107271331 A CN107271331 A CN 107271331A
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- pipe tobacco
- main flume
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- flue gas
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/02—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material
- G01N11/04—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture
- G01N11/08—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture by measuring pressure required to produce a known flow
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a kind of measuring method of pipe tobacco to main flume flow resistance coefficient.Pipe tobacco is used as porous media, its resistance coefficient flowed to main flume mainly includes pipe tobacco with the coefficient of frictional resistance of mainstream smoke contacts generation and because tobacco structure changes the inertial resistance coefficient produced, is represented respectively with viscosity factor and inertial resistance coefficient.On flue gas experiment machine platform, mainstream smoke velocity by pipe tobacco is measured using PIV, using pressure gage measurement pipe tobacco inlet and outlet two ends pressure difference, the quadratic polynomial for obtaining the mainstream smoke velocity by pipe tobacco and pipe tobacco two ends pressure difference will be fitted using origin or matlab softwares by the mainstream smoke velocity of pipe tobacco and pipe tobacco two ends pressure difference, then the pressure fall equation of pipe tobacco is substituted into quadratic polynomial and obtains viscosity factor and the inertial resistance coefficient size that pipe tobacco flows to main flume.
Description
Technical field
The present invention relates to the technical field of measurement main flume flow resistance coefficient, a kind of pipe tobacco is referred in particular to mainstream smoke
The measuring method of flow of air resistance coefficient.
Background technology
The measuring method for liquid flowing resistance coefficient mainly uses thermometer, flowmeter, fluid column differential manometer at present
The straight tube resistance coefficient and coefficient of partial resistance of fluid, this method are calculated by measuring the mechanical power loss of fluid Deng instrument
It is generally used for the drag losses caused when liquid flows in simply pipeline due to liquid and pipe friction and pipeline deformation；For
The measuring method of gas flow resistance coefficient is mainly flowed using instruments such as blower fan, disk, dynamometer, pressure gauges by measuring
Resistance, gas density, flow velocity, limited areal calculate the resistance coefficient of gas.
Although there is the measuring method of a variety of measurement fluid flow resistance coefficients both at home and abroad, PIV technologies and pressure are utilized
Pipe tobacco not yet occurs to main flume flow resistance coefficient when strong meter is to measure suction cigarette.
The content of the invention
It is a primary object of the present invention to overcome the shortcoming and deficiency of prior art there is provided a kind of pipe tobacco to mainstream smoke air-flow
The measuring method of dynamic resistance coefficient, pipe tobacco glues to main flume flowing when can accurately measure suction cigarette by this method
Property resistance coefficient and inertial resistance coefficient.
In order to achieve the above object, the present invention uses following technical scheme：
The invention discloses a kind of measuring method of pipe tobacco to main flume flow resistance coefficient, comprise the following steps：
(1) flowing velocity of the cigarette smoke in suction sleeve when suction cigarette is shot according to PIV system experimentations, by taking out
Inhale sleeve in velocity of flue gas push away cigarette outlet mainstream smoke velocity；
(2) the inlet and outlet two ends pressure difference of pipe tobacco is measured using pressure gage, in atmosphere, its is relative for the import of pipe tobacco
The pressure of air is 0, and the pressure p of the outlet relative atmospheric of pipe tobacco need to be only measured with pressure1, then can calculate pipe tobacco import and
Export two ends pressure difference Δ p=-p1；
(3) it will be entered by the mainstream smoke velocity of pipe tobacco and pipe tobacco two ends pressure difference using origin or matlab softwares
Row fitting obtains the quadratic polynomial Δ p=A ν of pipe tobacco two ends pressure difference and the mainstream smoke velocity by pipe tobaccoi+Bνi 2；
(4) pressure fall equation of pipe tobacco is derived according to the equation of momentum of porous media：
I represents flow direction of the main flume in pipe tobacco in above-mentioned formula (1), and Δ p is that pipe tobacco two ends pressure difference, μ are
Smoke power viscosity,Viscosity factor, the ν flowed for pipe tobacco to main flumeiTo pass through the mainstream smoke velocity of pipe tobacco, C
Inertial resistance coefficient, the ρ flowed for pipe tobacco to main flume is that the density of flue gas, Δ n are cigarette length；
(5) by the pressure fall equation of pipe tobaccoThe fitting of origin softwares is substituted into obtain
Quadratic polynomial Δ p=A νi+Bνi 2, obtainSo as to try to achieve pipe tobacco to mainstream smoke air-flow
Dynamic viscosity factorThe inertial resistance coefficient C flowed with pipe tobacco to main flume.
As preferred technical scheme, in step (1), the main flume is the flue gas that suction side is flowed in cigarette, main
It is to flow to suction side to flow flow direction of the flue gas in pipe tobacco.
As preferred technical scheme, the main flume is a kind of special aerosol, and its solid phase particles included can
Using the trace particle as PIV system photographs.
As preferred technical scheme, in step (1), the suction sleeve is clear glass material, can be used in PIV systems
The shooting united to flue gas.
As preferred technical scheme, in step (1), the PIV systems include laser, CCD camera, synchronizer and meter
The part of calculation machine four, the computer of PIV systems controls laser to send horizontal laser light by the coordinative role of synchronizer, is irradiated to
On solid particle in flue gas, computer controls the flow image of CCD camera shooting flue gas by the coordinative role of synchronizer,
Image obtains the flowing velocity of flue gas after PIV systems carry software processing.
As preferred technical scheme, the velocity of flue gas in step (1) in suction sleeve push away cigarette outlet main flow
Velocity of flue gas, its specific method is：
The flue gas flow that being pushed away according to the continuity equation of fluid must aspirate in sleeve is equal to the flue gas flow Q that cigarette is exported1
=Q2, i.e. VSleeveASleeve=VCigarette is exportedACigarette is exported, the velocity of flue gas aspirated in sleeve is converted into the mainstream smoke velocity of cigarette outlet,
Wherein VSleeveFor the velocity of flue gas in suction sleeve, ASleeveFor suction sleeve cross-sectional area, VCigarette is exportedThe main flume exported for cigarette
Speed, ACigarette is exportedFor cigarette exit cross-sectional area.
As preferred technical scheme, in step (2), pressure gage includes pressure feeler inspection syringe needle, signal transmitting device and pressure
Display recorder；The pressure that the signal transmitting device of pressure gage can sound out pressure feeler inspection syringe needle carries out signal transacting, will locate
Signal after reason passes to pressure display recorder, shows pressure size.
As preferred technical scheme, the pressure drop side of pipe tobacco is derived in step (4) by the equation of momentum of porous media
Journey, its specific method is：
The equation of momentum of porous media is：
Push away the pressure fall equation of pipe tobacco is：
Δ p=-SiΔ n, i.e.,
I represents flow direction of the main flume in pipe tobacco, S in formulaiFor the source item of the equation of momentum, μ glues for smoke power
Degree,Viscosity factor, the ν flowed for pipe tobacco to main flumeiTo be pipe tobacco to master by the mainstream smoke velocity of pipe tobacco, C
Inertial resistance coefficient, the ρ of stream flow of flue gas are that the density of flue gas, Δ p are that pipe tobacco two ends pressure difference, Δ n are cigarette length.
The present invention compared with prior art, has the following advantages that and beneficial effect：
(1) present invention uses non-intrusion measurement, and pressure gage measurement pipe tobacco exports the pressure of relative atmospheric, and PIV shoots and taken out
The velocity of flue gas in sleeve is inhaled, interference is not produced to flowing of the main flume in pipe tobacco；
(2) present invention can tested once to the measurement of mainstream smoke velocity and the measurement of pipe tobacco import and export pressure differential
In carry out simultaneously, it is to avoid experimental error during separated measurement；
(3) measuring method of the present invention can measure the viscosity factor that pipe tobacco flows to main flume, and can survey
The inertial resistance coefficient that amount pipe tobacco flows to main flume.
Brief description of the drawings
Fig. 1 passes through the mainstream smoke velocity of pipe tobacco and the experiment schematic diagram of pipe tobacco import and export two ends pressure difference for measurement；
Fig. 2 is flow chart of the pipe tobacco to main flume flow resistance coefficient measuring method.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited
In this.
Embodiment
As shown in figure 1, measuring the mainstream smoke velocity and pipe tobacco import and export two ends pressure difference by pipe tobacco for the present embodiment
Experiment schematic diagram, including：Cigarette 1, pressure gage syringe needle socket 2, laser irradiated plane 3, CCD camera 4 and flue gas experimental machine
System 5；Above-mentioned experiment realizes that the computer of the PIV systems controls to swash by the coordinative role of synchronizer based on PIV systems
Light device sends horizontal laser light, is irradiated on the solid particle in flue gas, and computer controls CCD by the coordinative role of synchronizer
Camera shoots the flow image of flue gas, and image obtains the flowing velocity of flue gas after PIV systems carry software processing.
Based on above-mentioned experiment schematic diagram, as shown in Fig. 2 measurement of the present embodiment pipe tobacco to main flume flow resistance coefficient
Method, comprises the steps：
(1) flowing velocity of the cigarette smoke in suction sleeve, is covered by suction when suction cigarette is shot according to PIV experiment
Velocity of flue gas in cylinder push away cigarette outlet mainstream smoke velocity, the main flume is to flow to the cigarette of suction side in cigarette
Gas, flow direction of the main flume in pipe tobacco is to flow to suction side；Main flume is as a kind of special aerosol, and it is wrapped
The trace particle that the solid phase particles contained can be shot as PIV；
Velocity of flue gas in suction sleeve push away cigarette outlet mainstream smoke velocity, its specific method is：
The flue gas flow that being pushed away according to the continuity equation of fluid must aspirate in sleeve is equal to the flue gas flow Q that cigarette is exported1
=Q2, i.e. VSleeveASleeve=VCigarette is exportedACigarette is exported, the velocity of flue gas aspirated in sleeve is converted into the mainstream smoke velocity of cigarette outlet.
(V in above-mentioned formulaSleeveFor the velocity of flue gas in suction sleeve, ASleeveFor suction sleeve cross-sectional area, VCigarette is exportedExported for cigarette
Mainstream smoke velocity, ACigarette is exportedFor cigarette exit cross-sectional area)
(2) the pressure gage syringe needle socket for stretching into the pressure feeler inspection syringe needle of pressure gage in flue gas experimental machine, using pressure gage
The inlet and outlet two ends pressure difference of pipe tobacco is measured, in atmosphere, the pressure of its relative atmospheric is 0 for the import of pipe tobacco, only needs to use
Pressure measures the pressure p of the outlet relative atmospheric of pipe tobacco1, then the inlet and outlet two ends pressure difference Δ p=- of pipe tobacco can be calculated
p1；
(3) it will be fitted and obtained using origin softwares by the mainstream smoke velocity of pipe tobacco and pipe tobacco two ends pressure difference
The quadratic polynomial Δ p=A ν of pipe tobacco two ends pressure difference and the mainstream smoke velocity by pipe tobaccoi+Bνi 2；
(4) pressure fall equation of pipe tobacco is derived according to the equation of momentum of porous media (i represents flow direction of the main flume in pipe tobacco in above-mentioned formula, Δ p be pipe tobacco two ends pressure difference,
μ be smoke power viscosity,Viscosity factor, the ν flowed for pipe tobacco to main flumeiTo pass through the mainstream smoke gas velocity of pipe tobacco
Degree, C are that inertial resistance coefficient, ρ that pipe tobacco flows to main flume are that the density of flue gas, Δ n are cigarette length).
The pressure fall equation of pipe tobacco is derived by the equation of momentum of porous media, its specific method is：
The equation of momentum of porous media is：Push away the pressure fall equation of pipe tobacco is：
Δ p=-SiΔ n, i.e.,(i represents stream of the main flume in pipe tobacco in above-mentioned formula
Dynamic direction, SiFor the source item of the equation of momentum, μ be smoke power viscosity,The viscous drag system flowed for pipe tobacco to main flume
Number, νiTo be that inertial resistance coefficient, ρ that pipe tobacco flows to main flume are the close of flue gas by the mainstream smoke velocity of pipe tobacco, C
Degree, Δ p are that pipe tobacco two ends pressure difference, Δ n are cigarette length)；
(5) by the pressure fall equation of pipe tobaccoThe fitting of origin softwares is substituted into obtain
Quadratic polynomial Δ p=A νi+Bνi 2, obtainSo as to try to achieve pipe tobacco to mainstream smoke air-flow
Dynamic viscosity factorThe inertial resistance coefficient C flowed with pipe tobacco to main flume.
Above-described embodiment is preferably embodiment, but embodiments of the present invention are not by above-described embodiment of the invention
Limitation, other any Spirit Essences without departing from the present invention and the change made under principle, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (8)
1. a kind of pipe tobacco is to the measuring method of main flume flow resistance coefficient, it is characterised in that comprise the following steps：
(1) flowing velocity of the cigarette smoke in suction sleeve, is covered by suction when suction cigarette is shot according to PIV system experimentations
Cylinder in velocity of flue gas push away cigarette outlet mainstream smoke velocity；
(2) using pressure gage measure pipe tobacco inlet and outlet two ends pressure difference, the import of pipe tobacco in atmosphere, its relative atmospheric
Pressure be 0, only need to be measured with pressure pipe tobacco outlet relative atmospheric pressure p1, then the inlet and outlet of pipe tobacco can be calculated
Two ends pressure difference Δ p=-p1；
(3) it will be intended by the mainstream smoke velocity of pipe tobacco and pipe tobacco two ends pressure difference using origin or matlab softwares
Close the quadratic polynomial Δ p=A ν for obtaining pipe tobacco two ends pressure difference and the mainstream smoke velocity by pipe tobaccoi+Bνi 2；
(4) pressure fall equation of pipe tobacco is derived according to the equation of momentum of porous media：
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I represents flow direction of the main flume in pipe tobacco in above-mentioned formula (1), and Δ p is that pipe tobacco two ends pressure difference, μ are flue gas
Dynamic viscosity,Viscosity factor, the ν flowed for pipe tobacco to main flumeiTo be cigarette by the mainstream smoke velocity of pipe tobacco, C
Inertial resistance coefficient that silk flows to main flume, ρ are that the density of flue gas, Δ n are cigarette length；
(5) by the pressure fall equation of pipe tobaccoSubstitute into the fitting of origin softwares is obtained two
Order polynomial Δ p=A νi+Bνi 2, obtainSo as to try to achieve what pipe tobacco flowed to main flume
Viscosity factorThe inertial resistance coefficient C flowed with pipe tobacco to main flume.
2. measuring method of the pipe tobacco to main flume flow resistance coefficient according to claim 1, it is characterised in that step
(1) in, the main flume is flows to the flue gas of suction side in cigarette, flow direction of the main flume in pipe tobacco is flow direction
Suction side.
3. measuring method of the pipe tobacco to main flume flow resistance coefficient according to claim 2, it is characterised in that the master
Stream flue gas is a kind of special aerosol, its solid phase particles included can as PIV system photographs trace particle.
4. measuring method of the pipe tobacco to main flume flow resistance coefficient according to claim 1, it is characterised in that step
(1) in, the suction sleeve is clear glass material, can be used in shooting of the PIV systems to flue gas.
5. measuring method of the pipe tobacco to main flume flow resistance coefficient according to claim 1, it is characterised in that step
(1) in, the PIV systems include laser, CCD camera, synchronizer and the part of computer four, and the computer of PIV systems passes through
The coordinative role of synchronizer controls laser to send horizontal laser light, is irradiated on the solid particle in flue gas, computer passes through
The coordinative role of synchronizer come control CCD camera shoot flue gas flow image, image is after PIV systems carry software processing
Obtain the flowing velocity of flue gas.
6. measuring method of the pipe tobacco to main flume flow resistance coefficient according to claim 1, it is characterised in that step
(1) velocity of flue gas in suction sleeve push away cigarette outlet mainstream smoke velocity, its specific method is：
The flue gas flow that being pushed away according to the continuity equation of fluid must aspirate in sleeve is equal to the flue gas flow Q that cigarette is exported1=Q2,
That is VSleeveASleeve=VCigarette is exportedACigarette is exported, the velocity of flue gas aspirated in sleeve is converted into the mainstream smoke velocity of cigarette outlet, wherein
VSleeveFor the velocity of flue gas in suction sleeve, ASleeveFor suction sleeve cross-sectional area, VCigarette is exportedThe mainstream smoke gas velocity exported for cigarette
Degree, ACigarette is exportedFor cigarette exit cross-sectional area.
7. measuring method of the pipe tobacco to main flume flow resistance coefficient according to claim 1, it is characterised in that step
(2) in, pressure gage includes pressure feeler inspection syringe needle, signal transmitting device and pressure display recorder；The signal transmitting device energy of pressure gage
The enough pressure for souning out pressure feeler inspection syringe needle carries out signal transacting, and the signal after processing is passed into pressure display recorder,
Show pressure size.
8. measuring method of the pipe tobacco to main flume flow resistance coefficient according to claim 1, it is characterised in that step
(4) pressure fall equation of pipe tobacco is derived in by the equation of momentum of porous media, its specific method is：
The equation of momentum of porous media is：
<mrow>
<msub>
<mi>S</mi>
<mi>i</mi>
</msub>
<mo>=</mo>
<mo>-</mo>
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<mi>&mu;</mi>
<mi>&alpha;</mi>
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Push away the pressure fall equation of pipe tobacco is：
Δ p=-SiΔ n, i.e.,
I represents flow direction of the main flume in pipe tobacco, S in formulaiFor the source item of the equation of momentum, μ be smoke power viscosity,
Viscosity factor, the ν flowed for pipe tobacco to main flumeiTo be pipe tobacco to mainstream smoke by the mainstream smoke velocity of pipe tobacco, C
Inertial resistance coefficient, the ρ of flow of air are that the density of flue gas, Δ p are that pipe tobacco two ends pressure difference, Δ n are cigarette length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710560756.5A CN107271331A (en) | 2017-07-11 | 2017-07-11 | A kind of measuring method of pipe tobacco to main flume flow resistance coefficient |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710560756.5A CN107271331A (en) | 2017-07-11 | 2017-07-11 | A kind of measuring method of pipe tobacco to main flume flow resistance coefficient |
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| CN107271331A true CN107271331A (en) | 2017-10-20 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710560756.5A Pending CN107271331A (en) | 2017-07-11 | 2017-07-11 | A kind of measuring method of pipe tobacco to main flume flow resistance coefficient |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333292A (en) * | 2018-02-05 | 2018-07-27 | 江苏中烟工业有限责任公司 | The devices and methods therefor of internal change in pressure drop during a kind of the real time measure cigarette burning |
| CN109187844A (en) * | 2018-08-31 | 2019-01-11 | 华南理工大学 | A kind of measuring method for the nearly pipe tobacco end flue gas rate of cigarette smoking process filter tip |
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2017
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| CN106706268A (en) * | 2017-02-28 | 2017-05-24 | 吉林大学 | Method and device for measuring viscous resistance coefficient and inertial resistance coefficient of porous medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333292A (en) * | 2018-02-05 | 2018-07-27 | 江苏中烟工业有限责任公司 | The devices and methods therefor of internal change in pressure drop during a kind of the real time measure cigarette burning |
| CN109187844A (en) * | 2018-08-31 | 2019-01-11 | 华南理工大学 | A kind of measuring method for the nearly pipe tobacco end flue gas rate of cigarette smoking process filter tip |
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