CN105606839A - Flame radiation-based combustion particle movement speed measurement device and method - Google Patents
Flame radiation-based combustion particle movement speed measurement device and method Download PDFInfo
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- CN105606839A CN105606839A CN201510951820.3A CN201510951820A CN105606839A CN 105606839 A CN105606839 A CN 105606839A CN 201510951820 A CN201510951820 A CN 201510951820A CN 105606839 A CN105606839 A CN 105606839A
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- 239000002245 particle Substances 0.000 title claims abstract description 80
- 230000033001 locomotion Effects 0.000 title claims abstract description 64
- 230000005855 radiation Effects 0.000 title claims abstract description 35
- 238000005259 measurement Methods 0.000 title claims abstract description 28
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 30
- 238000012545 processing Methods 0.000 claims abstract description 26
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims description 18
- 239000013307 optical fiber Substances 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 9
- 238000010219 correlation analysis Methods 0.000 claims description 7
- 239000000523 sample Substances 0.000 claims description 7
- 238000005314 correlation function Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract 3
- 230000008859 change Effects 0.000 description 2
- 230000000541 pulsatile effect Effects 0.000 description 2
- 230000005514 two-phase flow Effects 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010230 functional analysis Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
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- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The invention relates to a flame radiation-based combustion particle movement speed measurement device and method. The measurement device includes a signal detection unit used for receiving radiation light intensity generated by combustion particles, a photoelectric conversion unit which includes a photoelectric convertor and is used for receiving light intensity signals radiated by the signal detection unit and converts the light intensity signals into voltage signals, a data acquisition system used for recording and storing the voltage signals of the photoelectric conversion unit, and a data processing unit used for processing the voltage signals stored in the photoelectric conversion unit so as to obtain the movement speed of the combustion particles, wherein the signal detection unit includes two signal detectors which are used for detecting upstream and downstream radiation light intensity signals and are located at one side of a combustion particle movement flow field and distributed along the movement direction of the combustion particles; the results of the movement speed of the combustion particles obtained by the data processing unit are stored in the a data acquisition system. The measurement device of the invention has the advantages of simple structure, non-contact type and high sensitivity.
Description
Technical field
The invention belongs to thermal measurement field, be specifically related to a kind of burning based on Fire RadiationMeasurement mechanism and the method for the burning particles movement velocity of grain two phase flow.
Background technology
In the burning two of the high-temp combustion particle of boiler coal-ash burning and SOLID PROPELLANT COMBUSTION etc.Xiang Liuzhong, the speed of burning particles is analytic combustion state and evaluates boiler and engine performanceOne of important parameter.
But, because the temperature of burning particles air-flow is higher, and due to burning, Multiphase Flow,The processes such as heat and mass transfer are very complicated, thereby brought a lot of difficulties to measurement.
At present, the measuring method of conventional burning particles speed is image measurement method. For burningParticle two phase flow, the image of particle is easily fallen into oblivion by very strong combustion flame signal, is difficult forProcess.
Summary of the invention
The object of this invention is to provide a kind of measurement dress of contactless burning particles movement velocityPut and method, it can overcome certain or some defect of prior art.
One aspect of the present invention provides a kind of measurement mechanism of burning particles movement velocity, forThe movement velocity of measuring the burning particles in Combustion Flow Field, comprising:
Acquisition of signal unit, for receiving the radiation light intensity that burning particles produces and being positioned at combustionBurn movement of particles flow field one side, acquisition of signal unit comprises two signal sensors, these two lettersNumber detector is used for surveying upstream and downstream radiation light intensity signal and along burning particles direction of motion clothPut;
Photoelectric conversion unit, comprises optical-electrical converter, for receiving from acquisition of signal unit spokeThe light intensity signal of penetrating also converts light intensity signal to voltage signal;
Data collecting system, the voltage letter of changing for recording and preserve photoelectric conversion unitNumber; And
Data processing unit, for the electricity of photoelectric conversion unit that data collecting system is preservedPress signal to process, and obtain the movement velocity of burning particles,
The result quilt of the movement velocity of the burning particles that wherein, data processing unit obtainsBe kept in data collecting system.
Contactless burning particles movement velocity measurement mechanism provided by the invention has been realized high temperatureThe tachometric survey of burning particles, further improves existing burning particles movement velocity measurement mechanismSimple and easy degree is put forward high measurement sensitivity simultaneously.
In a specific embodiment of the present invention, signal sensor is radiation light intensity probe, visitsHead is arranged perpendicular to the burning particles direction of motion, thereby can be detected more easily radiation light intensity letterNumber.
In a specific embodiment of the present invention, acquisition of signal unit and photoelectric conversion unit are logicalCrossing optical fiber connects. Optical fiber is two, receives respectively for transmitting from two signal sensorsRadiation light intensity signal, and send radiation light intensity signal to photoelectric conversion unit.
In a specific embodiment of the present invention, data processing unit is by data acquisition beingThe voltage signal gathering in system carries out cross-correlation analysis, while obtaining the getting over of two-way voltage signalBetween, and the transition time of basis signal calculate flow field velocity. The present invention is only based on Fire Radiation,Taking in Combustion Flow Field non-uniform combustion particle produce radiant light pretend as cross-correlation analysis withMachine signal is realized cross-correlation and is tested the speed.
Another aspect of the present invention provides a kind of measuring method of burning particles movement velocity, the partyMethod utilizes the measurement mechanism of the burning particles movement velocity described in above any one to measure,And comprise the following steps:
Determine the distance between two signal sensors of acquisition of signal unit;
Acquisition of signal unit receives the radiation light intensity signal from burning particles, and by light intensity signalBe delivered to photoelectric conversion unit;
The light intensity signal that photoelectric conversion unit carrys out the transmission of acquisition of signal unit converts voltage letter toNumber and changed voltage signal is passed to data collecting system;
Random using the light intensity signal of two upstream and downstream as cross-correlation analysis of data processing unitSignal, carries out cross-correlation function analysis to two light intensity signals, draws the motion speed of burning particlesDegree,
The result quilt of the movement velocity of the burning particles that wherein, data processing unit obtainsBe kept in data collecting system.
Burning particles movement velocity measuring method provided by the invention only needs two along grain flowThe radiation signal that moving direction upstream and downstream receives can obtain related data, by related dataProcess, can obtain burning particles movement velocity.
Burning particles movement velocity measuring method of the present invention is carried out the motion of burning particles as followsThe measurement of speed:
(1) the radiation light intensity signal that data processing unit receives upstream and downstream is as cross-correlationThe random signal x (t) and the y (t) that analyze, carry out the cross-correlation function analysis of two signals:
Wherein, T is the integral mean time, and τ is time variable, Rxy(τ) at τ=τ0ReachLarge value, the transition time of cross-correlated signal is τ0；
(2), according to the transition time of cross-correlated signal, can calculate combustion according to following formulaBurn the average movement velocity of particle: v=d/ τ0, wherein d is the distance between upstream and downstream probe.
The present invention is based on Fire Radiation, with the even burning of density unevenness in burning particles two phase flowGrain group produces radiation light intensity and changes as fluctuating signal, by the upstream and downstream received arteries and veins of popping one's head inThe cross-correlation analysis of moving signal, obtains the cross-correlation transition time, and pop one's head in conjunction with upstream and downstream twoSpacing, calculates burning particles movement velocity. The measurement side of burning particles movement velocity of the present inventionMethod and device provide a kind of contactless burning particles movement velocity measurement mechanism and method, realThe tachometric survey of existing high-temp combustion particle, further improves existing burning particles movement velocity and measuresThe simple and easy degree of device, has the advantages such as simple in structure, non-contact measurement.
Brief description of the drawings
Fig. 1 is the structural representation of burning particles movement velocity measurement mechanism of the present invention; And
Fig. 2 is the flow chart of burning particles movement velocity measuring method of the present invention.
Detailed description of the invention
Describe the fortune of the burning particles based on Fire Radiation of the present invention in detail below in conjunction with accompanying drawingThe moving measurement mechanism of speed and the structure of method.
It will be appreciated by those skilled in the art that embodiment described below shows of the present inventionExample explanation, but not for it being made to any restriction.
Fig. 1 is the structural representation of the measurement mechanism of burning particles movement velocity of the present invention.
As shown in Figure 1, burner 1 burns, and produces Combustion Flow Field 2, burning particles fortuneThe measurement mechanism of moving speed is used for the movement velocity of the burning particles of measuring Combustion Flow Field 2.
The measurement mechanism of the burning particles movement velocity in Fig. 1 mainly comprises acquisition of signal unit3, photoelectric conversion unit 6, data collecting system 7 and data processing unit 8. Acquisition of signalUnit 3 is connected with photoelectric conversion unit 6 by optical fiber 5, and data collecting system 7 turns with photoelectricityChange unit 6 and be connected by data wire, and data processing unit 8 is by data wire and dataAcquisition system 7 is connected.
The radiation light intensity signal that acquisition of signal unit 3 produces for receiving burning particles, andBe positioned at a side of Combustion Flow Field 2 to be measured. This acquisition of signal unit 3 comprises two signal sensors4, signal sensor 4 is for surveying the radiation light intensity signal of upstream and downstream, and along burning particlesThe direction of motion arrange. In Fig. 1, show two optical fiber 5, these two optical fiber 5 are respectivelyFor receiving two radiation light intensity signals that signal sensor 4 is received, and by radiation light intensitySignal sends photoelectric conversion unit 6 to. According to a preferred exemplary of the present invention, acquisition of signalDevice 4 can be popped one's head in by force for radiant light, and radiation light intensity probe vertical is in the direction of motion of burning particlesArrange.
Photoelectric conversion unit 6 is for receiving the radiation light intensity signal from acquisition of signal unit 3,And photoelectric conversion unit 6 comprises optical-electrical converter, for by received radiation light intensity signalConvert voltage signal to, and by data wire, this voltage signal is sent to data collecting system7。
The voltage letter that data collecting system 7 transmits for recording and preserve photoelectric conversion unit 6Number.
Data processing unit 8 receives from the data of data collecting system 7 and to receivedData are processed, to obtain burning particles movement velocity. In an example of the present invention,Data processing unit 8 divides for the voltage signal of data collecting system 7 is carried out to cross-correlationAnalyse, obtain the transition time of two signals, and the basis signal transition time calculates flow field velocity.Data collecting system 7 is also for the result of save data processing unit 8.
Fig. 2 is the flow chart of the burning particles movement velocity measuring method in the present embodiment.
As shown in Figure 2, burning particles movement velocity measuring method comprises the following steps:
S1: the distance between two probes of first definite acquisition of signal unit 3, then pointBurner 1, the stable operation that keeps burner 1;
S2: acquisition of signal unit 3 receives the radiation light intensity signal of burning particles;
S3: radiation light intensity signal is passed to photoelectric conversion unit 6 by two optical fiber 5;
S4: photoelectric conversion unit 6 transmits by acquisition of signal unit 3 the radiation light intensity signal coming and turnsChange voltage signal into, and changed voltage signal is passed to data collecting system 7;
S5: the voltage the transmitting letter of data collecting system 7 real time record photoelectric conversion units 6Number;
S6: data processing unit 8 is processed the voltage signal of photoelectric conversion unit 6,To the movement velocity of burning particles, particularly, data processing unit 8 is with two upstream and downstream radiationLight intensity signal, as random signal x (t) and the y (t) of cross-correlation analysis, is carried out the mutual of two signalsClose Functional Analysis:
Wherein, T is the integral mean time, and τ is time variable, Rxy(τ) reach at τ=τ 0Large value, the transition time of cross-correlated signal is τ0Thereby, try to achieve τ signal transit time0。
Data processing unit 8, according to cross-correlation measuring principle, obtains burning particles mean motion speedDegree v:v=d/ τ0, wherein d is the distance between upstream and downstream probe. Data processing unit 8 willThe movement velocity of the burning particles that processing obtains is stored in data collecting system 7.
In the present embodiment, due to the pulse characteristic of burning, granule density pulsatile change, burningThe radiation light intensity of particle is not stopped pulsatile change yet in time, therefore data collecting system needs in real timeThe signal of two detectors of record.
The invention provides a kind of burning particles movement velocity measurement mechanism and method, testing arrangementComprise acquisition of signal unit, photoelectric conversion unit, data collecting system and data processing unit,Acquisition of signal unit is connected with photoelectric conversion unit by optical fiber, is positioned at burning particles motion flow fieldOne side, photoelectric conversion unit comprises optical-electrical converter, the light that acquisition of signal unit is passed overStrong signal converts voltage signal to, and data processing unit is used for data collecting system to storeData are processed, thereby obtain burning particles movement velocity. Owing to the present invention is based on flame spokePenetrate, taking in Combustion Flow Field non-uniform combustion particle produce radiant light pretend as cross-correlation analysis withMachine signal is realized cross-correlation and is tested the speed, and makes burning particles movement velocity provided by the invention measure dressPut and method only needs two radiation signals that receive along particle flow direction upstream and downstreamRelated data can be obtained, by related data is processed, burning particles motion speed can be obtainedDegree, has advantages of simple in structure, contactless, highly sensitive.
The invention is not restricted to the scope of detailed description of the invention, to the ordinary skill people of the artMember, as long as the spirit of the present invention that various variations limit and determine in described claimIn scope, these variations are apparent, the innovation and creation that all utilize the present invention to conceiveAll at the row of protection.
Claims (6)
1. a measurement mechanism for burning particles movement velocity, for measuring Combustion Flow FieldThe movement velocity of burning particles, comprising:
Acquisition of signal unit, for receiving the radiation light intensity that burning particles produces and being positioned at combustionBurn movement of particles flow field one side, acquisition of signal unit comprises two signal sensors, these two lettersNumber detector is used for surveying upstream and downstream radiation light intensity signal and along burning particles direction of motion clothPut;
Photoelectric conversion unit, comprises optical-electrical converter, for receiving from acquisition of signal unit spokeThe light intensity signal of penetrating also converts light intensity signal to voltage signal;
Data collecting system, the voltage letter of changing for recording and preserve photoelectric conversion unitNumber; And
Data processing unit, for the electricity of photoelectric conversion unit that data collecting system is preservedPress signal to process, and obtain the movement velocity of burning particles,
The result quilt of the movement velocity of the burning particles that wherein, data processing unit obtainsBe kept in data collecting system.
2. the measurement mechanism of burning particles movement velocity according to claim 1, wherein,Signal sensor is the probe of radiation light intensity, and probe vertical is in the direction of motion cloth of burning particlesPut.
3. the measurement mechanism of burning particles movement velocity according to claim 1 and 2,Wherein, acquisition of signal unit is connected by optical fiber with photoelectric conversion unit.
4. the measurement mechanism of burning particles movement velocity according to claim 3, wherein,Optical fiber is two, for transmitting the radiation light intensity letter receiving from two signal sensors respectivelyNumber, and send radiation light intensity signal to photoelectric conversion unit.
5. the measurement mechanism of burning particles movement velocity according to claim 1, wherein,Data processing unit is by carrying out cross-correlation to the voltage signal gathering in data collecting systemAnalyze, obtain the transition time of two-way voltage signal, and the transition time of basis signal calculatesFlow field velocity.
6. a measuring method for burning particles movement velocity, the method is utilized claim 1Measurement mechanism to the burning particles movement velocity described in any one in 5 is measured, andComprise the following steps:
Determine the distance between two signal sensors of acquisition of signal unit;
Acquisition of signal unit receives the radiation light intensity signal from burning particles, and by light intensity signalBe delivered to photoelectric conversion unit;
The light intensity signal that photoelectric conversion unit carrys out the transmission of acquisition of signal unit converts voltage letter toNumber and changed voltage signal is passed to data collecting system;
Random using the light intensity signal of two upstream and downstream as cross-correlation analysis of data processing unitSignal, carries out cross-correlation function analysis to two light intensity signals, draws the motion speed of burning particlesDegree,
The result quilt of the movement velocity of the burning particles that wherein, data processing unit obtainsBe kept in data collecting system.
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| CN201510951820.3A CN105606839A (en) | 2015-12-16 | 2015-12-16 | Flame radiation-based combustion particle movement speed measurement device and method |
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| CN201510951820.3A CN105606839A (en) | 2015-12-16 | 2015-12-16 | Flame radiation-based combustion particle movement speed measurement device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109163905A (en) * | 2018-08-15 | 2019-01-08 | 中国科学院力学研究所 | Flame Hot Wire Anemomtry system |
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| US5986277A (en) * | 1997-10-29 | 1999-11-16 | National Research Council Of Canada | Method and apparatus for on-line monitoring the temperature and velocity of thermally sprayed particles |
| US7012688B2 (en) * | 2002-07-31 | 2006-03-14 | Jan Arwood Northby | Method and apparatus for measuring particle motion optically |
| WO2012145829A1 (en) * | 2011-04-26 | 2012-11-01 | Tenova Goodfellow Inc. | Method and apparatus for high temperature gas flow velocity sensing |
| CN104374950A (en) * | 2014-11-17 | 2015-02-25 | 上海理工大学 | Engine combustion flow field speed measuring device and method based on flame radiation characteristics |
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2015
- 2015-12-16 CN CN201510951820.3A patent/CN105606839A/en active Pending
Patent Citations (4)
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|---|---|---|---|---|
| US5986277A (en) * | 1997-10-29 | 1999-11-16 | National Research Council Of Canada | Method and apparatus for on-line monitoring the temperature and velocity of thermally sprayed particles |
| US7012688B2 (en) * | 2002-07-31 | 2006-03-14 | Jan Arwood Northby | Method and apparatus for measuring particle motion optically |
| WO2012145829A1 (en) * | 2011-04-26 | 2012-11-01 | Tenova Goodfellow Inc. | Method and apparatus for high temperature gas flow velocity sensing |
| CN104374950A (en) * | 2014-11-17 | 2015-02-25 | 上海理工大学 | Engine combustion flow field speed measuring device and method based on flame radiation characteristics |
Non-Patent Citations (1)
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| 周洁等: "光信号互相关测量两相流中颗粒流动速度的研究", 《中国电机工程学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109163905A (en) * | 2018-08-15 | 2019-01-08 | 中国科学院力学研究所 | Flame Hot Wire Anemomtry system |
| CN109163905B (en) * | 2018-08-15 | 2020-04-21 | 中国科学院力学研究所 | Flame hot wire speed measuring system |
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Application publication date: 20160525 |