CN105588788B - A kind of CONSTANT VOLUME MODEL COMBUSTION CHAMBER is sprayed the measuring system and method for microscopic characteristics - Google Patents
A kind of CONSTANT VOLUME MODEL COMBUSTION CHAMBER is sprayed the measuring system and method for microscopic characteristics Download PDFInfo
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- CN105588788B CN105588788B CN201511034781.7A CN201511034781A CN105588788B CN 105588788 B CN105588788 B CN 105588788B CN 201511034781 A CN201511034781 A CN 201511034781A CN 105588788 B CN105588788 B CN 105588788B
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- constant volume
- combustion chamber
- volume model
- model combustion
- peep hole
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Classifications
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- 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
- G01N15/0205—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging
-
- 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
-
- 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
- G01N2015/0003—Determining electric mobility, velocity profile, average speed or velocity of a plurality of particles
Abstract
The invention discloses the measuring systems that a kind of CONSTANT VOLUME MODEL COMBUSTION CHAMBER is sprayed microscopic characteristics, system includes CONSTANT VOLUME MODEL COMBUSTION CHAMBER, fuel feed system with controller, digital delay generator and Phase Doppler Particle Analyzer, the CONSTANT VOLUME MODEL COMBUSTION CHAMBER is made of cabinet and burning body, the burning body is provided with the peep hole that four shapes are through-hole, the axis of the peep hole is in same level, angle between the axis of two of them peep hole is 180 °, angle between the axis of other two peep hole is 160 °, optical observation window is installed on the peep hole, the connecting hole being connected with the fuel feed system is provided with right above the middle part of the CONSTANT VOLUME MODEL COMBUSTION CHAMBER, the controller connects the digital delay generator, the output end connection phase Doppler particle analysis of digital delay generator Instrument.The purpose that spraying microscopic characteristics are measured in CONSTANT VOLUME MODEL COMBUSTION CHAMBER may be implemented in turn by using the measurement method of the measuring system.
Description
Technical field
The present invention relates to CONSTANT VOLUME MODEL COMBUSTION CHAMBER fields, and it is spraying microcosmic that more specifically, it relates to a kind of CONSTANT VOLUME MODEL COMBUSTION CHAMBERs
The measuring system and method for characteristic.
Background technique
In field of internal combustion engine, fuel atomizing process directly affects burning and emission performance, so for alleviate the energy and
Environmental problem contributes.Therefore for internal combustion engine researcher, spray characteristics (jet crushing length, the spray of fuel are obtained
Spray angle, oil droplet size and speed etc.) and its with ambient parameters (pressure, temperature, environmental gas type and density etc.)
Relationship, and then fuel atomization reaction mechanism is established, it is final to provide basic data for engine Spray Simulation and optimization,
It is the main purpose for carrying out oil atomizing research.
In actual internal combustion engine, spraying experimental study is difficult to carry out, this is because the control to spray condition parameter
System and adjustment are difficult to accomplish exactly accurate, and are limited by existing measuring instrument, are carried out to spray discharge pattern and its microscopic characteristics
Precise measurement is very difficult.Therefore one of common nanospray experiment research method is exactly constant volume combustion bomb method.
Existing part of spray characteristic measuring system and method can only under open space to spraying macroscopic view or microscopic characteristics into
Row measurement, or spraying macro morphology can only be measured in CONSTANT VOLUME MODEL COMBUSTION CHAMBER, it can not cooperate with advanced optical gauge,
Its microscopic characteristics (particle diameter distribution information and velocity profile information including spray particle) is measured, such system and method
Obviously it is unable to satisfy the requirement of test.The serious research hindered to the broken atomization depth of fuel of this limitation.
Summary of the invention
Purpose of the invention is to overcome the shortcomings in the prior art, provides a kind of CONSTANT VOLUME MODEL COMBUSTION CHAMBER and is sprayed microcosmic spy
Property measuring system and method, which can survey with the various moderns optics such as Phase Doppler Particle Analyzer (PDA)
Measuring appratus is used cooperatively, and may be implemented to measure in CONSTANT VOLUME MODEL COMBUSTION CHAMBER in turn to spray by using the measurement method of the measuring system
The purpose of mist microscopic characteristics.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of CONSTANT VOLUME MODEL COMBUSTION CHAMBER is sprayed the measuring system of microscopic characteristics, including CONSTANT VOLUME MODEL COMBUSTION CHAMBER, with controller
Fuel feed system, digital delay generator and Phase Doppler Particle Analyzer, the CONSTANT VOLUME MODEL COMBUSTION CHAMBER is by cabinet and combustion
It burns body to constitute, filled with the asbestos for heat preservation between the cabinet and burning body, the burning body is provided with four
Shape is the peep hole of through-hole, and the axis of the peep hole is between same level, the axis of two of them peep hole
Angle is 180 °, and the angle between the axis of other two peep hole is 160 °, and optical observation window is equipped on the peep hole
Mouthful, the connecting hole being connected with the fuel feed system, the control are provided with right above the middle part of the CONSTANT VOLUME MODEL COMBUSTION CHAMBER
Device processed connects the digital delay generator, and the output end of digital delay generator connects Phase Doppler Particle Analyzer.
The optical observation window is made of terminal port flange, optical glass and glass gland.
The terminal port flange is installed on peep hole by hexagon socket head cap screw, and optical glass is placed on terminal port flange, glass
Gland is connected by hexagon socket head cap screw with terminal port flange after compressing optical glass.
The cabinet is made of upper box, lower box and case lid.
A kind of CONSTANT VOLUME MODEL COMBUSTION CHAMBER is sprayed the measurement method of the measuring system of microscopic characteristics, and steps are as follows:
(1) dispose CONSTANT VOLUME MODEL COMBUSTION CHAMBER, by the transmitting probe of Phase Doppler Particle Analyzer and receiving transducer respectively with
Third optical observation window and the 4th optical observation window are corresponding；
(2) digital delay generator parameter is set, initial time, delay moment and pulsewidth length including trigger signal；
(3) Phase Doppler Particle Analyzer parameter, including triggering mode and measurement period mode are set；
(4) laser of Phase Doppler Particle Analyzer is opened, moves laser center after the origin at Calibration of Laser center
To measurement point；
(5) fuel feed system is controlled by controller and carries out fuel injection, digital delay hair into CONSTANT VOLUME MODEL COMBUSTION CHAMBER
Raw device receives the injection laggard line delay of open signal and handles and export trigger signal, and Phase Doppler Particle Analyzer receives
Start to measure the spray particle of measurement point in CONSTANT VOLUME MODEL COMBUSTION CHAMBER after the trigger signal of digital delay generator output, obtain
The size information and velocity information of the measurement point spray particle are obtained, laser center is moved into next survey after measurement point measurement
Point is measured, carries out point-to-point measurement according to the method described above, the final spraying microscopic characteristics obtained in CONSTANT VOLUME MODEL COMBUSTION CHAMBER, including spraying grain
The particle diameter distribution information and velocity profile information of son.
Compared with prior art, the beneficial effects brought by the technical solution of the present invention are as follows:
(1) the burning body in CONSTANT VOLUME MODEL COMBUSTION CHAMBER of the present invention is provided with the peep hole that four shapes are through-hole, peep hole
Angle of the axis between same level, the axis of two of them peep hole be 180 °, the axis of other two peep hole
Angle between line is 160 °, and optical observation window is equipped on peep hole；Change conventional view window in constant volume burning body
The structure layout design of mouth, can be used cooperatively with the advanced optical gauge of various modern, breach in constant volume burning
Limitation in body with optical measuring technique is, it can be achieved that survey spraying microscopic characteristics in CONSTANT VOLUME MODEL COMBUSTION CHAMBER
Amount, obtains the velocity profile information and particle diameter distribution information of spray particle.In addition, CONSTANT VOLUME MODEL COMBUSTION CHAMBER can accurately control it is various
The injection of pluralities of fuel may be implemented in thermodynamic parameter.
(2) present invention passes through the cooperation of digital delay generator and Phase Doppler Particle Analyzer (PDA), accurate to control
At the time of Phase Doppler Particle Analyzer (PDA) processed measurement spray particle and pulsewidth, it can be achieved that spray particle real-time measurement,
Effectively improve accuracy of data acquisition and experiment effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of measuring system of the present invention.
Fig. 2 is the structural schematic diagram of burning body in CONSTANT VOLUME MODEL COMBUSTION CHAMBER
Fig. 3 is the schematic cross-sectional view of Fig. 2.
Fig. 4 is the three dimensional structure diagram of upper box.
Fig. 5 is the three dimensional structure diagram of lower box.
Fig. 6 is the three dimensional structure diagram of case lid.
Appended drawing reference: 1- CONSTANT VOLUME MODEL COMBUSTION CHAMBER 2- fuel feed system 3- controller 4- digital delay generator 5- phase
Position Doppler particle analyzer 6- transmitting probe 7- receiving transducer 8- the first optical observation window 9- the second optical observation window
The 4th optical observation window of mouth 10- third optical observation window 11-
Specific embodiment
The invention will be further described with reference to the accompanying drawing.
As depicted in figs. 1 and 2, a kind of CONSTANT VOLUME MODEL COMBUSTION CHAMBER is sprayed the measuring system of microscopic characteristics, including constant volume burning dress
Set the 1, fuel feed system 2 with controller 3, digital delay generator 4 and Phase Doppler Particle Analyzer 5 (PDA), phase
Transmitting probe 6 and receiving transducer 7 are had on position Doppler particle analyzer 5 (PDA), CONSTANT VOLUME MODEL COMBUSTION CHAMBER 1 includes being mounted on case
The burning body in internal portion, filled with the asbestos for heat preservation, the burning body setting between the cabinet and burning body
There are four the peep holes that shape is through-hole, and the axis of the peep hole is in same level, the axis of two of them peep hole
Between angle be 180 °, the angle between the axis of other two peep hole is 160 °；Optics is installed on the peep hole
Watch window, as shown in figure 3, the angle between the first optical observation window 8 and the axis of third optical observation window 10 is
180 °, the angle between the second optical observation window 9 and the axis of the 4th optical observation window 11 is 160 °, the optical observation
Window is made of terminal port flange, optical glass and glass gland, and terminal port flange is installed on peep hole, optics by hexagon socket head cap screw
Glass is placed on terminal port flange, and glass gland is connected by hexagon socket head cap screw with terminal port flange after compressing optical glass；It is fixed
Hold and be provided with fuel feed system 2 right above 1 center of burner, fuel spurts into constant volume burning by fuel feed system 2
In device 1, controller 3 is used to control the start-up time and close moment of fuel injection；The output end and number of the controller 3
Delay time generator 4 is connected, and the output end of digital delay generator 4 is connected with Phase Doppler Particle Analyzer 5, and number is prolonged
When generator 4 be used to adjust using the external electric signal of controller output as the delay time of zero point, and trigger signal can be set
Pulsewidth；Phase Doppler Particle Analyzer 5 (PDA) is used to acquire and handle the microscopic information of spray particle, including broken kernel
The particle diameter distribution information and velocity profile information of son.
Cabinet is made of upper box, lower box and case lid；Fig. 4, Fig. 5 and Fig. 6 are respectively cabinet in CONSTANT VOLUME MODEL COMBUSTION CHAMBER
The three dimensional structure diagram of upper box, lower box and case lid.
Fuel feed system 2, digital delay generator 4 involved in the present invention and Phase Doppler Particle Analyzer 5
(PDA) it can be obtained by purchase, wherein fuel feed system 2 is purchased from Tianjin Dongfeng Automobile maintenance service station, and brand is
Bosch；Digital delay generator 4 is purchased from TitanElectro-Optics Co., Ltd., brand and model SRS-DG645；Phase
Doppler particle analyzer 5 (PDA) is purchased from Beijing Representative Office of Mai Di Technology Co., Ltd., and originating in quotient is that Denmark's pellet enlightening dynamic is public
Department.
The method and step for measuring spraying microscopic characteristics by above system is as follows:
(1) CONSTANT VOLUME MODEL COMBUSTION CHAMBER is disposed, by the third optical observation window 10 on body and the phase Doppler particle of burning
6 position of transmitting probe of analyzer is corresponding, controls Phase Doppler Particle Analyzer frame of axes, and phase Doppler particle is allowed to divide
The laser center of analyzer passes right through the axis of third optical observation window 10, the receiving transducer of Phase Doppler Particle Analyzer
7 is corresponding with burning the 4th optical observation window 11 of body, and the two center line is on same straight line；By fuel injection systems
Port " EXIT TRIG " of the output line access digital delay generator of system controller, holds at " AB " of digital delay generator
Mouth picks out single line, is connected to Phase Doppler Particle Analyzer (PDA) processor, just completes the connection of hardware now.
(2) digital delay generator parameter is set.Digital delay generator function button is adjusted, indicator light is made to be in " To "
Right side, then can demarcate digital time delayer, the zero point and fuel injection signal for making trigger signal are in synchronization.Regulatory function is pressed
Indicator light is placed in the left side of " AB " by button, adjusts numerical value button, i.e., the adjustable delay moment.Setting digital delay is t1, is meant
The initial point of trigger signal is located at the t1 after fuel injection signal initial point；Indicator light is placed in the right side of " AB " by regulatory function button
Side adjusts numerical value button, and the pulsewidth length of trigger signal is adjusted；It is t2 that its numerical value, which is arranged, means that the pulsewidth of trigger signal is
t2。
(3) Phase Doppler Particle Analyzer is adjusted.Triggering mode is set first, at Phase Doppler Particle Analyzer
The signal access port managed in device is corresponding, selects " BNC 1 " in " Sync.1 ", the choosing in " Trigger edge sync.1 "
" Positive " is selected, means that high level triggers；In " Binning type " inner selection " Time ", horizontal axis when synchro measure is meant
It is the time；Corresponding " BNC 1 " is selected in " Burst detector enable ", means Phase Doppler Particle Analyzer
The only data in measurement external input signal section, the in the present embodiment as trigger signal time pulsewidth of digital delay generator
t2。
(4) laser of Phase Doppler Particle Analyzer is opened, adjustment laser is soft by computer to suitable intensity
Part controls Phase Doppler Particle Analyzer frame of axes, laser center is moved to spray hole location, and be demarcated as origin, later will
Laser center moves to the measurement point of experimental setup.
Measurement point in the present embodiment is after obtaining spraying macro morphology using shadowing method by high-speed motion picture camera, according to
Experiment needs to choose by calculating, by being converted into the coordinate of corresponding Phase Doppler Particle Analyzer laser center and defeated
Enter into control software, by moving coordinate frame, laser center can be moved to the measurement point of practical CONSTANT VOLUME MODEL COMBUSTION CHAMBER.
(5) fuel feed system is controlled by controller and carries out fuel injection into CONSTANT VOLUME MODEL COMBUSTION CHAMBER, after injection is opened,
Controller will export an external electric signal and give digital delay generator, can export a touching after digital delay generator delay t1
It signals, Phase Doppler Particle Analyzer is opened after receiving trigger signal and within the cycle time of setting to measurement point
Spray particle measures, and measurement pulsewidth is t2, so recycles, until getting the population that experiment needs, stops injection；Phase
Doppler particle analyzer included software in position after treatment, can obtain the micro- of the measurement point spray particle to the particle measured
See characteristic.Laser center is moved into next measurement point later, carries out point-to-point measurement according to the method described above, it is fixed finally to measure
Hold the spraying microscopic characteristics of moment in burner, particle diameter distribution information and velocity profile information including spray particle.
The present invention is not limited to embodiments described above.Above the description of specific embodiment is intended to describe and say
Bright technical solution of the present invention, the above mentioned embodiment is only schematical, is not restrictive.This is not being departed from
In the case of invention objective and scope of the claimed protection, those skilled in the art may be used also under the inspiration of the present invention
The specific transformation of many forms is made, within these are all belonged to the scope of protection of the present invention.
Claims (2)
1. a kind of CONSTANT VOLUME MODEL COMBUSTION CHAMBER is sprayed the measuring system of microscopic characteristics, including CONSTANT VOLUME MODEL COMBUSTION CHAMBER, with the combustion of controller
Expect feed system, digital delay generator and Phase Doppler Particle Analyzer, which is characterized in that the CONSTANT VOLUME MODEL COMBUSTION CHAMBER by
Cabinet and burning body are constituted, filled with the asbestos for heat preservation, the main body for the body that burns between the cabinet and burning body
Chamber is a cylindrical interior main body chamber, extends outwardly in the surrounding of cylindrical interior main body chamber and arranges four visual peep holes,
Angle of the axis of the peep hole between same level, the axis of two of them peep hole is 180 °, other two
Angle between the axis of peep hole is 160 °, and optical observation window, the CONSTANT VOLUME MODEL COMBUSTION CHAMBER are equipped on the peep hole
Middle part right above be provided with the connecting hole being connected with the fuel feed system, the controller connects the digital delay
Generator, the output end of digital delay generator connect the Phase Doppler Particle Analyzer, the optical observation window by
Terminal port flange, optical glass and glass gland are constituted, and the terminal port flange is installed on peep hole, optics glass by hexagon socket head cap screw
Glass is placed on terminal port flange, and glass gland is connected by hexagon socket head cap screw with terminal port flange after compressing optical glass, described
Cabinet is made of upper box, lower box and case lid.
2. a kind of CONSTANT VOLUME MODEL COMBUSTION CHAMBER is sprayed the measurement method of the measuring system of microscopic characteristics, step according to claim 1
It is as follows:
(1) dispose CONSTANT VOLUME MODEL COMBUSTION CHAMBER, by the transmitting probe of Phase Doppler Particle Analyzer and receiving transducer respectively with third
Optical observation window and the 4th optical observation window are corresponding；
(2) digital delay generator parameter is set, initial time, delay moment and pulsewidth length including trigger signal；
(3) Phase Doppler Particle Analyzer parameter, including triggering mode and measurement period mode are set；
(4) laser for opening Phase Doppler Particle Analyzer, moves to survey for laser center after the origin at Calibration of Laser center
Amount point；
(5) fuel feed system is controlled by controller and carries out fuel injection, digital delay generator into CONSTANT VOLUME MODEL COMBUSTION CHAMBER
It receives the injection laggard line delay of open signal and handles and export trigger signal, Phase Doppler Particle Analyzer receives number
Start to measure the spray particle of measurement point in CONSTANT VOLUME MODEL COMBUSTION CHAMBER after the trigger signal of delay time generator output, be somebody's turn to do
Laser center is moved to next measurement after measurement point measurement by the size information and velocity information of measurement point spray particle
Point carries out point-to-point measurement according to the method described above, the final spraying microscopic characteristics obtained in CONSTANT VOLUME MODEL COMBUSTION CHAMBER, including spray particle
Particle diameter distribution information and velocity profile information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511034781.7A CN105588788B (en) | 2015-12-31 | 2015-12-31 | A kind of CONSTANT VOLUME MODEL COMBUSTION CHAMBER is sprayed the measuring system and method for microscopic characteristics |
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| CN201511034781.7A CN105588788B (en) | 2015-12-31 | 2015-12-31 | A kind of CONSTANT VOLUME MODEL COMBUSTION CHAMBER is sprayed the measuring system and method for microscopic characteristics |
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| CN105588788A CN105588788A (en) | 2016-05-18 |
| CN105588788B true CN105588788B (en) | 2018-12-04 |
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| CN201511034781.7A Expired - Fee Related CN105588788B (en) | 2015-12-31 | 2015-12-31 | A kind of CONSTANT VOLUME MODEL COMBUSTION CHAMBER is sprayed the measuring system and method for microscopic characteristics |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404410B (en) * | 2016-12-02 | 2018-08-21 | 江苏大学 | Device and method that is a kind of while measuring diesel spray structure and combustion characteristics |
| CN109060613B (en) * | 2018-08-20 | 2020-09-25 | 昆明理工大学 | Device for measuring particle field by using infrared holography |
| CN112844895B (en) * | 2021-01-03 | 2021-08-17 | 清华大学 | Device for controlling liquid jet flow crushing |
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Inventor after: Wang Yulong Inventor after: Du Qing Inventor after: Bai Fuqiang Inventor after: Yang Xian Inventor after: Chen Shixing Inventor after: Yang Ziming Inventor before: Yang Ziming Inventor before: Du Qing Inventor before: Bai Fuqiang Inventor before: Yang Xian Inventor before: Chen Shixing |
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Address after: 300350 Haijing garden, Haihe Education Park, Jinnan, Tianjin, 135, Tianjin University. Applicant after: Tianjin University Address before: 300072 Tianjin City, Nankai District Wei Jin Road No. 92 Applicant before: Tianjin University |
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