CN106593718A - Dual-fuel jet research device combining schlieren technology and PIV technology and method thereof - Google Patents
Dual-fuel jet research device combining schlieren technology and PIV technology and method thereof Download PDFInfo
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- CN106593718A CN106593718A CN201610999666.1A CN201610999666A CN106593718A CN 106593718 A CN106593718 A CN 106593718A CN 201610999666 A CN201610999666 A CN 201610999666A CN 106593718 A CN106593718 A CN 106593718A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
- F02M43/04—Injectors peculiar thereto
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
- F02M63/023—Means for varying pressure in common rails
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/85—Investigating moving fluids or granular solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N2021/8405—Application to two-phase or mixed materials, e.g. gas dissolved in liquids
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fuel-Injection Apparatus (AREA)
- Testing Of Engines (AREA)
Abstract
The invention provides a dual-fuel jet research device combining the schlieren technology and the PIV technology and a method of the dual-fuel jet research device combining the schlieren technology and the PIV technology. The dual-fuel jet research device combining the schlieren technology and the PIV technology comprises a constant-volume-chamber system, a gas jetting system, an oil supply system, a schlieren system, a PIV system and an electrical control system. A natural gas jetting device of the gas jetting system and a diesel oil jetting device of the oil supply system are fixedly installed in a jet combiner of the constant-volume-chamber system. The jet combiner is installed on the top of a constant volume chamber. The electrical control system controls work of the natural gas jetting device and the diesel oil jetting device and controls a laser, a first camera and a second camera to work simultaneously through a synchronizer. By the adoption of the dual-fuel jet research device combining the schlieren technology and the PIV technology and the method of the dual-fuel jet research device combining the schlieren technology and the PIV technology, jet mixing of dual fuels is achieved, the schlieren technology is utilized to capture clear mist spray outline images, a velocity field of an experiment area is obtained through the PIV technology, and the jet mixing feature of the jets of the double fuels is researched through the synthesis of the clear mist spray outline images and the velocity field.
Description
Technical field
The invention belongs to internal combustion engine research field, and in particular to the natural gas/bavin of a kind of combination stration technique and PIV technologies
Oily double fuel jet research device and its method.
Background technology
With the expansion of industrial consumption and personal consumption, China persistently rises to energy demand, and fossil resource, such as bavin
Problem caused by oil, the excessive exploitation of gasoline is increasingly highlighted.The continuous intensification of the energy, environmental crisis, has had a strong impact on China
Economic and society healthy and rapid development.Additionally, Environmental Protection in China regulation is constantly upgraded, state four discharges and implements in full, to diesel oil
Engine Industry affects very big.As can be seen here, development and utilization clean energy resource is imperative.Natural gas is used as a kind of generation of cleaning
With fuel, relatively enrich in the reserves of China.Its main component is methane, and comparing with diesel oil has higher calorific value.Research
Show in SAE981160, the temperature of methane spontaneous combustion in 2ms will at least reach 1200K, can reach far above conventional diesel
Temperature 850K for arriving～950K, accordingly, it would be desirable to lean on spark ignition or diesel oil ignited technology to provide energy for combustion of natural gas.
In recent decades, the research of natural gas engine achieves greater advance.Canadian Westport companies, BKM Inc. of the U.S. is equal
Propose that " micro- ignition in hydriding bifuel system, energy is provided with a small amount of diesel pilot for natural gas.Research SAE 1999-01-
3556 find, relatively low discharge and higher thermal effect are obtained in that using diesel oil ignited natural gas in high pressure direct injection diesel engine
Rate, effective foundation is provided for natural gas in in-engine application.The diesel oil ignited natural gas course of work is, first in cylinder
A small amount of diesel oil is sprayed as detonator, diesel oil compression-ignited formation flame, subsequent main fuel during piston movement to top dead centre
Natural gas sprays into in-cylinder combustion work done with higher pressure.In document SAE981400, the injection that Ouellette et al. is mentioned
System is one valve pocket of increase in traditional fuel injector, and valve pocket had both served as the valve body of diesel injector, gas spraying is served as again
The needle-valve of emitter.The patent of Publication No. US5996558 proposes the labyrinth using two sets of nozzles, high cost.Close the country
It is little in the patent of this respect, a kind of double fuel injection pump that patent publication No. is proposed for the patent of ZL 200410016233.7
And patent publication No. is that the dual fuel nozzle that ZL 200510017269.1 is proposed cannot realize CNG/ diesel oil in-cylinder direct-jet skills
Art.Patent publication No. proposes a kind of injection dress for realizing natural gas diesel dual-fuel for the patent of ZL 201310019736.9
Put and method.The patent increases the nozzle of a valve bush part composition on the basis of the nozzle couple that needle-valve and valve body are constituted, and three
Couple each other between individual part, realizes the coaxial spraying technique of CNG/Diesel.But the requirement on machining accuracy pole of the ejector
Height, complex structure is domestic difficult to realize at present.
The dual fuel injection apparatus and method that above-mentioned patent is mentioned, it is impossible to realize diesel oil ignited natural gas in-cylinder direct-jet skill
Art.At present the core of the technology is all monopolized by overseas enterprise, domestic to be still in technological gap.In the face of increasingly serious energy ring
Border crisis, exigence develops the application technology of clean energy resource.Therefore, it is highly desirable to develop environmental benefit protrusion, power
The powerful diesel oil ignited natural gas in-cylinder direct-jet technology of performance.
The content of the invention
The purpose of the present invention is that the double fuel jet for providing a kind of combination stration technique and PIV technologies for the problems referred to above grinds
Study carefully devices and methods therefor, the present invention devises a kind of injection combiner that can realize diesel oil and natural gas double-fuel injection, and
Constant volume bullet top is installed on, and is connected with a set of natural gas injection system and diesel spraying system, by automatically controlled system
The control of system, realizes dual-fuel injection mixing；Stration technique and PIV technologies are combined again, by synchronization
Device shoots the contour images and speed field picture of double fuel spraying simultaneously.The two result is combined Jing after post processing of image, is deeply divided
Analysis dual fuel injection mixed process.
The technical scheme is that：A kind of double fuel jet research device of combination stration technique and PIV technologies, including
Constant volume bullet system, gas ejecting system, oil supply system, schlieren system, PIV systems and electric-control system；
The natural gas injector and oil supply system diesel injector of the gas ejecting system is fixedly mounted on constant volume bullet system
In injection combiner, injection combiner is arranged on constant volume bullet top；
The schlieren system includes light source, reflecting mirror one, concave mirror one, concave mirror two, the reflecting mirror two, edge of a knife and camera
Two；The circular concave mirror one, concave mirror two are coaxial with circular constant volume bullet side window, are arranged symmetrically on constant volume bullet both sides；
The light source axis is with the axis co-planar of concave mirror one and has angle；Reflecting mirror one is arranged in light source front, and reflection light can be projected
To on concave mirror one；The axis of the camera two is with the axis co-planar of concave mirror two and has angle；Reflecting mirror two is arranged in before camera two
Side, the reflected beams of reflecting mirror two are received by camera two；The edge of a knife is placed between reflecting mirror two, camera two in the focus of light beam；Instead
Successively line is in " Z " type to penetrate mirror one, concave mirror one, concave mirror two, reflecting mirror two；
The PIV systems include PIV laser instrument, camera one and spectroscope；PIV laser instrument is arranged in the constant volume bullet back side, institute
Transmitting laser projects Experimental Area by constant volume bullet rear window；Tracer is met laser and is scattered in constant volume bullet, scattered light
Jing constant volume bullet side windows are projected on concave mirror two；The axis of camera one is with the axis co-planar of concave mirror two and has angle；Spectroscope
The front of camera one is arranged in, dichroic mirror light beam is received by camera one；
The electric-control system includes computer two, ECU and lock unit；The ECU includes transceiver module, natural gas injector
Control module and diesel injector control module；The transceiver module is electrically connected with computer two, by what is received from computer two
Signal is sent to natural gas injector control module and diesel injector control module, the natural gas injector control module with
Natural gas injector is electrically connected, and the diesel injector control module is electrically connected with diesel injector；The lock unit input
Electrically connect with computer two, outfan is electrically connected respectively with PIV laser instrument, camera one and camera two；ECU is to natural gas injection
While device and diesel injector transmission signal, computer two is also transferred the signal to the, computer two is by lock unit control
PIV laser instrument launches laser and camera one and camera two shoot photo simultaneously.
In such scheme, the constant volume bullet system includes constant volume bullet, injection combiner and nitrogen cylinder；The injection combiner
By screwed hole and the top for being bolted to constant volume bullet, nitrogen cylinder is connected by high-pressure air pipe two with constant volume bullet；The high pressure
Valve and air relief valve one are installed on trachea two.
In such scheme, the gas ejecting system includes natural gas bottle, natural gas high pressure trachea one and natural gas injector；Institute
State natural gas bottle to be connected with natural gas injector by high-pressure air pipe one, natural gas injector is arranged on injection combiner；Institute
State and be separately installed with high-pressure air pipe pressure transducer, temperature sensor and air relief valve two.
In such scheme, the oil supply system includes high pressure oil rail, high-pressure oil pump, fuel tank, computer one and diesel injection
Device；One end of the high-pressure oil pump is connected with fuel tank, and the other end is connected with high pressure oil rail, and high pressure oil rail is by high-pressure oil pipe and bavin
Oil ejector connects, and diesel injector is arranged on injection combiner；
Pressure transducer is installed on the high pressure oil rail；The computer one respectively with high-pressure oil pump and pressure transducer
Electrical connection；Injection pressure is set in the computer one, in the high pressure oil rail that computer one is detected according to pressure transducer
Fuel injection pressure signal, by controlling fuel delivery of the high-pressure oil pump to high pressure oil rail, by the adjustment of oil pressure in high pressure oil rail to desirable pressure.
It is a kind of according to the combination stration technique and the method for testing of the double fuel jet research device of PIV technologies, including
Following steps：
S1, the part for including the double fuel jet research device of the combination stration technique and PIV technologies install connection；
S2, opening light source, adjustment reflecting mirror one, reflecting mirror two, concave mirror one, the concave mirror two, edge of a knife to appropriate location will
Target is placed in Experimental Area central authorities, the focal length of camera two is adjusted, until target is high-visible；Keep reflecting mirror one, reflecting mirror two, recessed
Face mirror one, concave mirror two, knife-edge positions are constant, adjustment spectroscope to appropriate location, and target is placed in into Experimental Area central authorities, adjust
The focal length of camera one, until target is high-visible；
S3, unlatching air supply system and oil supply system, are respectively adjusted to air pressure, oil pressure by air relief valve two, computer one
Required experiment value；
S4, opening light source, ECU is controlled on computer two by software kit, adjusts natural gas injector and diesel oil spray
The injection pulse width of emitter, injection phase, and injection frequency, in the wink that natural gas injector and diesel injector are started working
Between, ejection pulse signal is transmitted to computer two by ECU, and computer two controls respectively PIV laser instrument, camera one by lock unit
Work is started simultaneously at camera two；Camera one, camera two catch respectively the image of PIV systems and schlieren system；By changing phase
The time delay of machine, capture not in the same time under spray discharge pattern, to carry out double fuel jet mixing characteristic research；
S5, according to the image for shooting, adjust the concentration of gas, and camera gain, the image optimal to obtain quality；
S6, acquisition spraying image, are carried out after image procossing with the poster processing soft, then carry out double fuel jet injection mixing spy
Property is researched and analysed.
Compared with prior art, the invention has the beneficial effects as follows：
1. the present invention realizes dual-fuel injection mixing by dual fuel injection combiner, is diesel oil ignited natural cylinder
The exploitation of interior direct fuel-injection engine provides experimental data.
2. present invention combination stration technique and PIV technical testing double fuel spray fields, using stration technique double fuel is obtained
Profile, obtain the velocity field of double fuel spraying using PIV technologies, both comprehensive analysis result, can be more deep quantitative point
Analysis dual fuel injection mixed characteristic
3. the present invention devises a set of electric-control system, and the electric-control system can control camera one, camera two, laser instrument simultaneously
Work, allows this experimental provision to obtain synchronous double fuel spraying contour images and speed field picture.
The present invention realizes dual-fuel injection mixing, using stration technique, contour images of clearly spraying is captured, while sharp
The velocity field of Experimental Area is obtained with PIV technologies, comprehensive the two result is studying the injection mixed characteristic of double fuel jet.
Description of the drawings
Fig. 1 is the combination stration technique of an embodiment of the present invention and the double fuel jet research device structure of PIV technologies
Schematic diagram；
Fig. 2 is the injection combiner three-dimensional cross-sectional figure of an embodiment of the present invention.
In figure：1st, computer one；2nd, pressure transducer one；3rd, high pressure co-rail system；4th, concave mirror one；5th, high-pressure oil pipe；6、
LED light source；7th, high-pressure air pipe one；8th, pressure sensor two；9th, valve；10th, temperature sensor；11st, PIV laser instrument；12nd, air relief valve
One；13rd, air relief valve two；14th, high-pressure air pipe two；15th, natural gas bottle；16th, nitrogen cylinder；17th, concave mirror two；18th, camera one；19、
Camera two；20th, the edge of a knife；21st, lock unit；22nd, computer two；23、ECU；24th, reflecting mirror one；25th, combiner is sprayed；26th, constant volume
Bullet；27th, reflecting mirror two；28th, spectroscope；29th, natural gas injector；30th, diesel injector.
Specific embodiment
Below in conjunction with the accompanying drawings specific embodiment is described in further detail to the present invention, but protection scope of the present invention is simultaneously
Not limited to this.
Fig. 1 is that one kind of the double fuel jet research device of a kind of combination stration technique of the present invention and PIV technologies is real
Apply the double fuel jet research device of mode, the combination stration technique and PIV technologies, including constant volume bullet system, gas ejecting system,
Oil supply system, schlieren system, PIV systems and electric-control system.
The constant volume bullet system includes constant volume bullet 26, injection combiner 25 and nitrogen cylinder 16；The injection combiner 25 leads to
Cross screwed hole and be bolted to the top of constant volume bullet 26；Nitrogen cylinder 16 is connected by high-pressure air pipe 2 14 with constant volume bullet 26, institute
State and valve 9 and air relief valve 1 are installed on high-pressure air pipe two.Open valve 9, by air relief valve 1 adjust nitrogen pressure to
Desirable value, is that constant volume bullet 26 provides back pressure；After reaching desirable pressure, valve 9 and air relief valve 1 are closed.
The gas ejecting system includes natural gas bottle 15, natural gas high pressure trachea 1 and natural gas injector 29；Natural gas bottle
15 are connected by high-pressure air pipe 1 with natural gas injector 29, and pressure transducer 8, temperature sensor 10 and air relief valve 13 are distinguished
On high-pressure air pipe 7.High-pressure natural gas in natural gas bottle 15 are depressurized to desirable pressure through air relief valve 13, by pressure
Sensor 8, the pressure of the detection natural gas of temperature sensor 10 and temperature.Natural gas injector 29 is arranged on injection combiner 25
On, realize natural gas injection.
The oil supply system includes high pressure oil rail 3, high-pressure oil pump, fuel tank, computer 1 and diesel injector 30；It is described
One end of high-pressure oil pump is connected with fuel tank, and the other end is connected with high pressure oil rail 3, and high pressure oil rail 3 is sprayed by high-pressure oil pipe 5 with diesel oil
Emitter 30 connects, and diesel injector 30 is arranged on injection combiner 25, realizes diesel injection；Install on the high pressure oil rail 3
There is pressure transducer 2；The computer 1 is electrically connected respectively with high-pressure oil pump and pressure transducer 2.Needed in meter according to experiment
Injection pressure is set in calculation machine 1.The fuel injection pressure signal in high pressure oil rail 3 that computer 1 is detected according to pressure transducer 2,
By controlling fuel delivery of the high-pressure oil pump to high pressure oil rail 3, by the adjustment of oil pressure in high pressure oil rail 3 to desirable pressure.
The schlieren system include light source 6, reflecting mirror 1, concave mirror 1, concave mirror 2 17, reflecting mirror 2 27, knife
Mouth 20 and camera 2 19.Each part relative position is as shown in Figure 1.The circular concave mirror 1, concave mirror 2 17 and circular constant volume
The side window of bullet 26 is coaxial, is arranged symmetrically on the both sides of constant volume bullet 26；The axis of the light source 6 and the axis co-planar of concave mirror 1, have
Appropriate angle；Reflecting mirror 1 is arranged in into the front of light source 6, reflection light is projected on concave mirror 1；The camera
2 19 axis and the axis co-planar of concave mirror 2 17, there is appropriate angle；Reflecting mirror 2 27 is arranged in into the front of camera 2 19, reflection is made
The reflected beams of mirror 2 27 can be received by camera 2 19；The edge of a knife 20 is placed on into light beam between reflecting mirror 2 17, camera 2 19
In focus；Successively line is in " Z " type for reflecting mirror 1, concave mirror 1, concave mirror 2 17, reflecting mirror 2 27.
The reflected mirror 1 of diverging light that the light source 6 sends is projected on concave mirror 1 after reflecting, and diverging light is through recessed
Face mirror 1 becomes directional light after reflecting, and the form of light beam Jing constant volumes bullet 26 is projected on concave mirror 2 17 through Experimental Area, parallel
Light becomes converged light after the reflection of concave mirror 2 17, and Jing spectroscopes 2 are projected on illuminator 2 27, and light beam is when the edge of a knife 20
Part light is blocked by the edge of a knife, and remaining light is caught by camera 2 19 and is imaged.Wherein spectroscope 28 does not have substantially to schlieren system light beam
Have an impact.
The PIV systems include PIV laser instrument 11, camera 1 and spectroscope 28.Each part relative position such as Fig. 1 institutes
Show.PIV laser instrument 11 is arranged in the back side of constant volume bullet 26, launches laser and projects test block by the rear window of constant volume bullet 26
Domain；Tracer is met laser and is scattered in constant volume bullet 26, and the side window of scattered light Jing constant volume bullet 26 is projected on concave mirror 2 17；
The axis of camera 1 and the axis co-planar of concave mirror 2 17, there is appropriate angle；Spectroscope 28 is arranged in into the front of camera 1, is made point
The reflected beams of light microscopic 28 can be received by camera 1.
The specific wavelength laser Jing constant volume bullet forms that the PIV laser instrument 11 sends are irradiated to Experimental Area, laser irradiation
Scatter on tracer, scattered light Jing constant volume bullet form is projected on concave mirror 2 17, and scattered light is through concave mirror 2 17
Become converged light after reflection, light beam is caught by camera 1 Jing after the reflection of spectroscope 28 and is imaged.
The double fuel jet research device of combination stration technique of the present invention and PIV technologies organically combine stration technique and
PIV technologies, it is preferable that
The electric-control system includes computer 2 22, ECU23, lock unit 21；The ECU23 includes transceiver module, natural
Gas blowout emitter control module and diesel injector control module；The transceiver module is electrically connected with computer 2 22, will be from calculating
The signal that machine 2 22 is received is sent to natural gas injector control module and diesel injector control module, the natural gas injection
Device control module is electrically connected with natural gas injector 29, the switch for controlling natural gas injector 29, the diesel injector
Control module is electrically connected with diesel injector 30, the switch for controlling diesel injector 30；The input of the lock unit 21 with
Computer 2 22 is electrically connected, and outfan electrically connects respectively with PIV laser instrument 11, camera 1, camera 2 19, camera 1 and phase
Machine 2 19 is ICCD cameras.ECU23 also believes this while to 30 transmission signal of natural gas injector 29 and diesel injector
Number it is sent to computer 2 22, computer 2 22 controls PIV laser instrument 11 and launches laser and the He of camera 1 by lock unit 21
Camera 2 19 shoots photo simultaneously.
Present invention also offers with reference to stration technique and the method for testing of the double fuel jet research device of PIV technologies, tool
Body is comprised the following steps：
S1, the double fuel jet research device of the combination stration technique and PIV technologies is pressed Fig. 1, Fig. 2 install connection；
S2, opening light source 6, adjustment reflecting mirror 1, reflecting mirror 2 27, concave mirror 1, concave mirror 2 17, the edge of a knife 20 are arrived
Appropriate location, by target Experimental Area central authorities are placed in, and the focal length of camera 2 19 are adjusted, until target is high-visible；Keep reflecting mirror
One 24, reflecting mirror 2 27, concave mirror 1, concave mirror 2 17, the position of the edge of a knife 20 are constant, adjustment spectroscope 28 to appropriate location, will
Target is placed in Experimental Area central authorities, the focal length of camera 1 is adjusted, until target is high-visible.
S3, unlatching air supply system and oil supply system, are respectively adjusted to air pressure, oil pressure by air relief valve 2 13, computer 1
Required experiment value；
S4, opening light source 6, ECU23 is controlled on computer 2 22 by software kit, adjusts the He of natural gas injector 29
The injection pulse width of diesel injector 30, injection phase, and injection frequency, open in natural gas injector 29 and diesel injector 30
Ejection pulse signal is transmitted to computer 2 22 by the moment of beginning work, ECU23, and computer 2 22 is controlled respectively by lock unit 21
PIV laser instrument 11 processed, camera 1 and camera 2 19 start simultaneously at work；Camera 1, camera 2 19 catch respectively PIV systems
With the image of schlieren system；By change camera time delay, capture not in the same time under spray discharge pattern, to carry out double fuel jet
Mixed characteristic research；
S5, according to the image for shooting, adjust the concentration of gas, and camera gain, the image optimal to obtain quality；
S6, acquisition spraying image, are carried out after image procossing with the poster processing soft, then carry out double fuel jet injection mixing spy
Property is researched and analysed.
The present invention devise it is a kind of can realize the injection combiner 25 of diesel gas dual fuel injection, and installed
In the top of constant volume bullet 2, it is connected with a set of natural gas supply system and diesel feed system；By electric-control system, control is double
The injection mixing of fuel, in conjunction with stration technique and PIV technologies, the profile diagram of double fuel spraying is shot by lock unit 21 simultaneously
Picture and speed field picture.The two result is combined Jing after post processing of image, dual fuel injection mixed process is analysed in depth.
The embodiment be the present invention preferred embodiment, but the present invention is not limited to above-mentioned embodiment, not
In the case of the flesh and blood of the present invention, any conspicuously improved, replacement that those skilled in the art can make
Or modification belongs to protection scope of the present invention.
Claims (5)
1. the double fuel jet research device of a kind of combination stration technique and PIV technologies, it is characterised in that including constant volume bullet system
System, gas ejecting system, oil supply system, schlieren system, PIV systems and electric-control system；
The natural gas injector (29) and oil supply system diesel injector (30) of the gas ejecting system is fixedly mounted on constant volume bullet system
In the injection combiner (25) of system, injection combiner (25) is installed in constant volume bullet (26) top；
The schlieren system includes light source (6), reflecting mirror one (24), concave mirror one (4), concave mirror two (17), reflecting mirror two
(27), the edge of a knife (20) and camera two (19)；The circular concave mirror one (4), concave mirror two (17) and circular constant volume bullet (26) side
Face-port mouth is coaxial, is arranged symmetrically on constant volume bullet (26) both sides；Light source (6) axis and the axis co-planar of concave mirror one (4) and
There is angle；Reflecting mirror one (24) is arranged in light source (6) front, and reflection light can be projected on concave mirror one (4)；The camera two
(19) axis is with the axis co-planar of concave mirror two (17) and has angle；Reflecting mirror two (27) is arranged in the front of camera two (19), reflection
The reflected beams of mirror two (27) are received by camera two (19)；The edge of a knife (20) is placed on light between reflecting mirror two (17), camera two (19)
In the focus of beam；Successively line is in " Z " type for reflecting mirror one (24), concave mirror one (4), concave mirror two (17), reflecting mirror two (27)；
The PIV systems include PIV laser instrument (11), camera one (18) and spectroscope (28)；PIV laser instrument (11) is arranged in fixed
Hold bullet (26) back side, launch laser and Experimental Area is projected by constant volume bullet (26) rear window；The interior spike of constant volume bullet (26)
Thing is met laser and is scattered, and scattered light Jing constant volume bullet (26) side window is projected on concave mirror two (17)；The axle of camera one (18)
Line is with the axis co-planar of concave mirror two (17) and has angle；Spectroscope (28) is arranged in the front of camera one (18), and spectroscope (28) is anti-
Irradiating light beam is received by camera one (18)；
The electric-control system includes computer two (22), ECU (23) and lock unit (21)；The ECU (23) including transceiver module,
Natural gas injector control module and diesel injector control module；The transceiver module is electrically connected with computer two (22), will
The signal received from computer two (22) is sent to natural gas injector control module and diesel injector control module, the day
So gas blowout emitter control module is electrically connected with natural gas injector (29), the diesel injector control module and diesel injector
(30) electrically connect；Lock unit (21) input is electrically connected with computer two (22), outfan respectively with PIV laser instrument
(11), camera one (18) and camera two (19) are electrically connected；ECU (23) is to natural gas injector (29) and diesel injector (30)
While transmission signal, computer two (22) is also transferred the signal to the, computer two (22) controls PIV by lock unit (21)
Laser instrument (11) launches laser and camera one (18) and camera two (19) while shooting photo.
2. the double fuel jet research device of a kind of combination stration technique according to claim 1 and PIV technologies, its feature
It is that the constant volume bullet system includes constant volume bullet (26), injection combiner (25) and nitrogen cylinder (16)；The injection combiner
(25) by screwed hole and the top for being bolted to constant volume bullet (26), nitrogen cylinder (16) is by high-pressure air pipe two (14) and constant volume
Bullet (26) connects；Valve (9) and air relief valve one (12) are installed on the high-pressure air pipe two (14).
3. the double fuel jet research device of a kind of combination stration technique according to claim 1 and PIV technologies, its feature
It is that the gas ejecting system includes natural gas bottle (15), natural gas high pressure trachea one (7) and natural gas injector (29)；It is described
Natural gas bottle (15) is connected by high-pressure air pipe one (7) with natural gas injector (29), and natural gas injector (29) is installed in spray
Penetrate on combiner (25)；Pressure transducer (8), temperature sensor (10) and decompression are separately installed with the high-pressure air pipe (7)
Valve two (13).
4. the double fuel jet research device of a kind of combination stration technique according to claim 1 and PIV technologies, its feature
It is that the oil supply system includes high pressure oil rail (3), high-pressure oil pump, fuel tank, computer one (1) and diesel injector (30)；Institute
The one end for stating high-pressure oil pump is connected with fuel tank, and the other end is connected with high pressure oil rail (3), and high pressure oil rail (3) is by high-pressure oil pipe (5)
It is connected with diesel injector (30), diesel injector (30) is in injection combiner (25)；
Pressure transducer (2) is installed on the high pressure oil rail (3)；The computer one (1) respectively with high-pressure oil pump and pressure
Sensor (2) is electrically connected；Injection pressure is set in the computer one (1), and computer one (1) is examined according to pressure transducer (2)
The fuel injection pressure signal in high pressure oil rail (3) for measuring, by controlling fuel delivery of the high-pressure oil pump to high pressure oil rail (3), by hydraulic oil
Adjustment of oil pressure in rail (3) is to desirable pressure.
5. a kind of according to claim 1 with reference to stration technique and the test side of the double fuel jet research device of PIV technologies
Method, it is characterised in that comprise the following steps：
S1, the part for including the double fuel jet research device of the combination stration technique and PIV technologies install connection；
S2, opening light source (6), adjustment reflecting mirror one (24), reflecting mirror two (27), concave mirror one (4), concave mirror two (17), knife
Mouth (20) to appropriate location, by target Experimental Area central authorities are placed in, and the focal length of camera two (19) are adjusted, until target is high-visible；
Keep reflecting mirror one (24), reflecting mirror two (27), concave mirror one (4), concave mirror two (17), the edge of a knife (20) position constant, adjustment
Spectroscope (28) to appropriate location, by target Experimental Area central authorities are placed in, and the focal length of camera one (18) are adjusted, until target clearly may be used
See；
S3, unlatching air supply system and oil supply system, are respectively adjusted air pressure, oil pressure by air relief valve two (13), computer one (1)
To required experiment value；
S4, opening light source (6), ECU (23) is controlled on computer two (22) by software kit, adjusts natural gas injector
(29) and diesel injector (30) injection pulse width, injection phase, and injection frequency, in natural gas injector (29) and diesel oil
The moment that ejector (30) is started working, ejection pulse signal is transmitted to computer two (22), computer two (22) by ECU (23)
PIV laser instrument (11), camera one (18) and camera two (19) are controlled respectively by lock unit (21) and starts simultaneously at work；Camera one
(18), camera two (19) catches respectively the image of PIV systems and schlieren system；By the time delay for changing camera, when capture is different
The spray discharge pattern inscribed, to carry out double fuel jet mixing characteristic research；
S5, according to the image for shooting, adjust the concentration of gas, and camera gain, the image optimal to obtain quality；
S6, acquisition spraying image, are carried out after image procossing with the poster processing soft, then carry out double fuel jet injection mixed characteristic
Research and analyse.
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