CN108152044A - The device and method that simulation two-step supercharging pressure side/whirlpool end bypass influences spray characteristics - Google Patents
The device and method that simulation two-step supercharging pressure side/whirlpool end bypass influences spray characteristics Download PDFInfo
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- CN108152044A CN108152044A CN201810011258.XA CN201810011258A CN108152044A CN 108152044 A CN108152044 A CN 108152044A CN 201810011258 A CN201810011258 A CN 201810011258A CN 108152044 A CN108152044 A CN 108152044A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
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Abstract
The present invention discloses a kind of device and method simulated two-step supercharging pressure side/whirlpool end bypass and influenced on spray characteristics, device includes pressure side bypass simulation system, variable volume firebomb device and spraying camera system, pressure side/whirlpool end bypass is studied to atomization, mixing in variable volume firebomb using recombination laser induced fluorescence technology, development course, the influence of concentration distribution and microscopic characteristics condition.The present invention can more actually simulate pressure side/influence of whirlpool end bypass to spray characteristics in piston approaches top dead center, and providing gross data with mixing so as to fulfill high-efficiency cleaning burning using improvement spray atomization after pressure/whirlpool end bypass for further investigation supports.
Description
Technical field
The present invention relates to technical field of automobile engine, specially a kind of simulation two-step supercharging pressure side/whirlpool end bypass is to spray
The device and method that mist characteristic influences.
Background technology
Increasingly strict with the pursuit to internal combustion engine thermal efficiency and emission regulation, single-stage turbocharging can not meet
Diesel engine is to the use demand of big flow.In two-step supercharging system, the appearance of pressure side bypass has weight to two-step supercharging system
Big meaning.At present, the most commonly used is in a hiigh pressure stage booster pressure side by-pass in parallel, its presence is to the tune of air inflow
Section is more flexible, to the different demands of tolerance during especially for variable working condition.After pressure side by-passing valve is opened, hiigh pressure stage compressor goes out
The gas backflow of mouth goes back to hiigh pressure stage compressor inlet end, and an airflow circulating is thus formd between hiigh pressure stage and by-passing valve,
So as to reduce the throughput entered in cylinder.Whirlpool end bypass and pressure side bypass are then different, and the air pressure of turbine outlet is not above
The air pressure of entrance, so the branch of fraction from the side flows to the port of export of turbine and without whirlpool after whirlpool end valve is opened
Wheel, reduces the efficiency of turbine so as to affect the working condition of compressor in this way.The unlatching of pressure side/whirlpool end by-passing valve not only subtracts
Air inflow is lacked, also the flow characteristics of gas has been had an impact, so as to affect the spray cone angle and oil droplet during fuel injection
Particle diameter distribution after broken, distribution of concentration.
Invention content
In view of the above-mentioned problems, the purpose of the present invention is to provide a kind of simulation two-step supercharging pressure side/whirlpool end bypass to spraying
The device and method that characteristic influences, can solve in practical internal combustion engine, and pressure side/whirlpool end bypasses ask sightless to spray characteristics
Topic can more actually simulate pressure side/influence of whirlpool end bypass to spray characteristics in piston approaches top dead center, for further investigation
It burns so as to fulfill high-efficiency cleaning and gross data support is provided using improvement spray atomization after pressure/whirlpool end bypass and mixing.Technology
Scheme is as follows：
A kind of device simulated two-step supercharging pressure side/whirlpool end bypass and influenced on spray characteristics, bypasses simulation system, can including pressure side
Capacity firebomb device and spraying camera system；
The pressure side bypass simulation system includes air compressor, lower pressure stage turbine, hiigh pressure stage turbine, air cleaner, low pressure
Grade compressor and hiigh pressure stage compressor；
The gas outlet of air compressor is connected to the air inlet of lower pressure stage turbine, and the gas outlet of lower pressure stage turbine is connected to hiigh pressure stage
The air inlet of turbine is equipped with whirlpool end temperature sensor I and whirlpool side pressure force snesor I at lower pressure stage turbine gas outlet；High pressure
Whirlpool end bypass branch is equipped between the air inlet of grade turbine and gas outlet, whirlpool end bypass branch is equipped with solenoid valve I, solenoid valve I
The side being connect with the gas outlet of hiigh pressure stage turbine is equipped with whirlpool end temperature sensor II and whirlpool side pressure force snesor II；Hiigh pressure stage whirlpool
The gas outlet of wheel is also connected to the tracheae for leading to air；
The gas outlet of air cleaner is connected to the air inlet of low-pressure stage compressor, and the gas outlet of low-pressure stage compressor is connected to height
It arbitrarily downgrades the air inlet of compressor, temperature sensor I and pressure sensor I is equipped at low-pressure stage compressor gas outlet；It is close
Temperature sensor II and pressure sensor II are equipped at hiigh pressure stage compressor gas outlet；The air inlet and outlet of hiigh pressure stage compressor
Pressure side bypass branch is equipped between mouthful, pressure side bypass branch is equipped with solenoid valve II, solenoid valve II and hiigh pressure stage compressor outlet
The side of mouth connection is equipped with pressure sensor III and temperature sensor III；
The lower pressure stage turbine is connected with each other with low-pressure stage compressor by common axis of rotation, the hiigh pressure stage turbine and high pressure
Grade compressor is connected with each other by common axis of rotation；
The variable volume firebomb device includes cylindric combustion chamber and its internal piston；Burning is equipped with above combustion chamber
Upper end cover is played, firebomb upper end cover is equipped with fuel injector, and is equipped with and is connected to the through-hole of vacuum pump by exhaust pipe and is connected to
The through-hole of hiigh pressure stage compressor gas outlet；Bottom of combustion chamber is equipped with bleeder pipe and air inlet pipe；Air inlet pipe is connected to the steel cylinder of gas storage,
Solenoid valve III and pressure reducing valve are additionally provided in air inlet pipe；Bleeder pipe is equipped with vent valve；Sidewall of combustion chamber is equipped with firebomb form Ι
With firebomb form II；The such position sensor of piston base；
The spraying camera system includes spectroscope, Xecl excimer lasers and the high-speed motion picture camera for shooting gas phase
The ICCD Ι and high-speed motion picture camera ICCD Π for shooting liquid phase；Spectroscope is placed in outside firebomb form Ι, high-speed motion picture camera ICCD Ι
Focus with high-speed motion picture camera ICCD Π on spectroscope in merging；The laser that Xecl excimer lasers are sent out through reflective mirror Ι and
Reflective mirror II reflects, and is converted to a branch of light, then shine by firebomb form II through beam expanding lens, collimating mirror and compressional mirror successively
It is mapped in combustion chamber；
Above all of sensor, solenoid valve and high-speed motion picture camera ICCD and fuel injector, air compressor, Xecl quasi-molecules
Laser is all connected to automatically controlled and collecting unit, the automatically controlled control signal that computer is received with collecting unit and is sent out, realize oil spout,
The control that photography and solenoid valve open and close.
Further, the firebomb form Ι is distributed with firebomb form II on chamber wall in 90 ° of angles.
Further, the top land is ω combustion-chamber shapes；Inner Wall of Combustion Chamber is equipped with for piston limit
Baffle ring；Sealing ring is equipped between piston combustion chamber interior walls.
A kind of experimental method of device that spray characteristics are influenced using simulation two-step supercharging pressure side/whirlpool end bypass, including
Following steps：
Step 1：Fluorescer will be filled in fuel tank to be used for simulating diesel spray, adjustment fuel injector stretches into combustion chamber to suitably deeply
Degree；
Step 2：Xecl excimer lasers are opened, reflective mirror Ι and reflective mirror II is adjusted, makes what Xecl excimer lasers were sent out
Before laser to beam expanding lens, change the diameter of laser by beam expanding lens, and light beam is converged by collimating mirror, finally through overcompression
Light beam is converted into a branch of light vertical irradiation in the combustion chamber by mirror；
Step 3：Two high-speed motion picture cameras and spectroscopical angle are adjusted, before the light beam in firebomb is guided to video camera；
Step 4：Air compressor is opened, and adjusting the control valve in air compressor makes boost pressure reach preset value；
Step 5：Solenoid valve II or solenoid valve Ι is controlled to open, then solenoid valve III is controlled to open；
Step 6：When piston stroking upward to precalculated position, control fuel injector, which is opened, generates spraying, due to the induction of fluorescer stimulated light
It shines；
Step 7：Two high-speed cameras of control are shot, while are acquired so the number of temperature sensor and pressure sensor
According to；
Step 8：Close all solenoid valves, open vent valve, make piston return, open air in vacuum pumped combustion chamber and
Spraying dropping liquid.
Further, in the step 4, if boost pressure, which is less than, presets boost pressure, control valve root in air compressor
According to the signal that automatically controlled and collecting unit is sent out valve is opened big and improve its power, be allowed to close to desired value；Boost pressure
If higher than default boost pressure, control valve turns down valve simultaneously with the signal that collecting unit is sent out according to automatically controlled in air compressor
And reduce its power, it is allowed to close to desired value.
The beneficial effects of the invention are as follows：
Can be into one 1. the present invention provides a simulation two-step supercharging pressure side/whirlpool end bypass to influence device to spray characteristics
Step optimization Injection strategy provides foundation；
2. the present invention replaces exhaust gas-driven turbine using compressor, be conducive to simplify device, and be more nearly simulator
Truth makes scheme be easier to realize；
3. the present invention can preferably analyze the air velocity distribution after by-passing valve unlatching using the temperature and pressure sensor of installation
Variation；
4. the present invention more really simulates the stream of the air-flow of compression top center in engine using variable volume firebomb
；
5. the present invention processes the shape of combustion chamber on moveable piston, be conducive to really simulate combustion chamber to spraying
Influence.
Description of the drawings
Fig. 1 influences apparatus structure schematic diagram for present invention simulation two-step supercharging pressure side/whirlpool end bypass on spray characteristics.
Fig. 2 influences experimental method flow chart for present invention simulation two-step supercharging pressure side/whirlpool end bypass on spray characteristics.
In figure：1- air compressors；2- air cleaners；3- lower pressure stage turbines；4- low-pressure stage compressors；5- temperature sensing
Device I；6- pressure sensors I；7- whirlpools end temperature sensor I；8- whirlpools side pressure force snesor I；9- solenoid valves；10- whirlpools end temperature
Sensor II；11- whirlpools side pressure force snesor II；12- hiigh pressure stage turbines；13- hiigh pressure stage compressors；14 temperature sensors II；15-
Pressure sensor II；16- solenoid valves II；17- pressure sensors III；18- temperature sensors III；19- fuel injectors；20- is calculated
Machine；21- high-speed motion picture cameras 1CCD I；22- spectroscope 23- high-speed motion picture camera lCCD Π；24- vent valves；25- bleeder pipes；26-
Baffle ring；27- pistons；28- sealing rings；29- position sensors；30- air inlet pipe；31- solenoid valves III；32- pressure reducing valves；33- steel
Bottle；34- firebomb upper end covers；35- compressional mirrors；36- collimating mirrors；37- beam expanding lens；38- reflective mirrors I；39- reflective mirrors II；
40-Xecl excimer lasers；41- exhaust pipes；42- vacuum pumps；43- is automatically controlled and collecting unit.
Specific embodiment
The present invention is described in further details in the following with reference to the drawings and specific embodiments.As shown in Figure 1, a kind of simulation two
The device that grade supercharging pressure side/whirlpool end bypass influences spray characteristics, including pressure side bypass simulation system, variable volume firebomb
Device and spraying camera system.
The pressure side bypass simulation system includes air compressor 1, lower pressure stage turbine 3, hiigh pressure stage turbine 12, air-filtering
Device 2, low-pressure stage compressor 4 and hiigh pressure stage compressor 13.
The gas outlet of air compressor 1 is connected to the air inlet of lower pressure stage turbine 3, the gas outlet connection of lower pressure stage turbine 3
To the air inlet of hiigh pressure stage turbine 12, whirlpool end temperature sensor I 7 and whirlpool end pressure are equipped at 3 gas outlet of lower pressure stage turbine
Sensor I 8；Whirlpool end bypass branch is equipped between the air inlet of hiigh pressure stage turbine 12 and gas outlet, whirlpool end bypass branch is equipped with
Solenoid valve I 9, the side that solenoid valve I 9 is connect with the gas outlet of hiigh pressure stage turbine 12 are equipped with whirlpool end temperature sensor II 10 and whirlpool end
Pressure sensor II 11.When solenoid valve I is opened, whirlpool end bypass branch can make air without hiigh pressure stage turbine, directly from low pressure
Grade turbine outlet port is to hiigh pressure stage turbine outlet port；The gas outlet of hiigh pressure stage turbine is also connected to the tracheae for leading to air.
The gas outlet of air cleaner 2 is connected to the air inlet of low-pressure stage compressor 4, the gas outlet of low-pressure stage compressor 4
The air inlet of hiigh pressure stage compressor 13 is connected to, temperature sensor I 5 and pressure are equipped at 4 gas outlet of low-pressure stage compressor
Sensor I 6；Temperature sensor II 14 and pressure sensor II 15 are equipped at 13 gas outlet of hiigh pressure stage compressor；Hiigh pressure stage
Pressure side bypass branch is equipped between the air inlet of compressor 13 and gas outlet, pressure side bypass branch is equipped with solenoid valve II 16, electricity
The side that magnet valve II 16 is connect with 13 gas outlet of hiigh pressure stage compressor is equipped with pressure sensor III 17 and temperature sensor III 18.It is high
13 gas outlet of compressor of arbitrarily downgrading is connected by pipeline with the air inlet of not constant volume combustion bomb.
The lower pressure stage turbine 3 is connected with each other with low-pressure stage compressor 4 by common axis of rotation, the hiigh pressure stage turbine
12 are connected with each other with hiigh pressure stage compressor 13 by common axis of rotation.
The variable volume firebomb device includes cylindric combustion chamber and its internal piston 27；It is set above combustion chamber
There is firebomb upper end cover 34, firebomb upper end cover 34 is equipped with fuel injector 19, and is equipped with and is connected to vacuum pump by exhaust pipe 41
42 through-hole and the through-hole for being connected to 13 gas outlet of hiigh pressure stage compressor；The firebomb upper end cover 34 passes through bolt and cylinder body
It links together, there are three holes for upper part.For installing fuel injector 19, one connects with pipeline for one hole, for allow air into
Enter in firebomb, another is connected to be vented with exhaust pipe 41.
Bottom of combustion chamber is equipped with bleeder pipe 25 and air inlet pipe 30；Air inlet pipe 30 is connected to the steel cylinder 33 of gas storage, air inlet pipe 30
On be additionally provided with solenoid valve III 31 and pressure reducing valve 32；Bleeder pipe 25 is equipped with vent valve 24.Sidewall of combustion chamber is regarded equipped with firebomb
Window Ι and firebomb form II；The such position sensor 29 in 27 bottom of piston.In order to facilitate arrangement external equipment, this implementation
Being separated by 90 degree of distributions on the firebomb device side wall of example, there are four forms for shooting.
27 top of piston is ω combustion-chamber shapes；Inner Wall of Combustion Chamber is equipped with the baffle ring for being limited to piston 27
26；Sealing ring 28 is equipped between 27 Inner Wall of Combustion Chamber of piston.
The spraying camera system includes spectroscope 22, Xecl excimer lasers 40 and the high speed for shooting gas phase
The video camera ICCD Ι 21 and high-speed motion picture camera ICCD Π 23 for shooting liquid phase；Spectroscope 22 is placed in outside firebomb form Ι, high
The focus of fast video camera ICCD Ι 21 and high-speed motion picture camera ICCD Π 23 merges on spectroscope 22；Xecl excimer lasers 40
The laser sent out is reflected through reflective mirror Ι 39 and reflective mirror II 38, and is converted to successively through beam expanding lens 37, collimating mirror 36 and compressional mirror
A branch of light, then be irradiated in combustion chamber by firebomb form II；
Above all of sensor, solenoid valve and high-speed motion picture camera ICCD and fuel injector 19, air compressor 1, Xecl standards point
Sub- laser 40 is all connected to the automatically controlled control letter sent out with collecting unit 43, automatically controlled and collecting unit 43 reception computer 20
Number, realize the control that oil spout, photography and solenoid valve open and close.
Control method：
It is automatically controlled to can control the aperture of control valve and air compressor operating power in air compressor, and be same with collecting unit
When receive the gas pressure and flow signal and collected each temperature and pressure transmitter signal of air compressor feedback.
Input needs the default boost pressure simulated in electric-control system, automatically controlled that air pressure is roughly calculated out with collecting unit
Contracting machine should output gas flow and pressure, and air compressor is controlled to start to work with certain power.At the same time,
The automatically controlled gas pressure and flow fed back with collecting unit according to the signal and air compressor that receive acquisition pressure sensor III
After signal, control signal fine tuning air compressor is sent out.
If boost pressure, which is less than, presets boost pressure, control valve is sent out according to automatically controlled and collecting unit in air compressor
Valve is opened big and improves its power by signal, is allowed to close to desired value.
If boost pressure, which is higher than, presets boost pressure, control valve is sent out according to automatically controlled and collecting unit in air compressor
Valve is turned down and reduces its power by signal, is allowed to close to desired value.
Test principle：
Temperature sensor Ι and the collected data of pressure sensor Ι are used to calculate low-pressure stage blower outlet flow, and monitor
The variation of hiigh pressure stage compressor inlet end gas pressure.Using The Ideal-Gas Equation PV=mRT, mass flow m can be calculated,
P perfect gases are pressure in formula, and V is volume, and R is ideal gas constant, and T perfect gases are thermodynamic temperature.Similarly temperature passes
Sensor II and pressure sensor II are used to calculate the gas flow by bypass branch, temperature sensing after pressure side by-passing valve is opened
Device III and pressure sensor III are used to calculate the flow of hiigh pressure stage blower outlet, and monitor hiigh pressure stage blower outlet end gas
The variation of body pressure.Analyze pressure side by-passing valve open during hiigh pressure stage compressor entrance end gas pressure variation,
Into bypass branch gas flow account for hiigh pressure stage exit gas flow ratio and branch in gas flow rates, be more preferable
Illustrate that pressure side bypass not only reduces gas flow and also the flow behavior of gas circuit is had an impact.With reference to the bat of laser induced fluorescence
It takes the photograph as a result, providing data support for influence of the pressure side bypass to spraying is explained further.
Experiment process：
Fluorescer will be filled in fuel tank first（Physical property is similar to diesel oil）For simulating diesel spray.Pass through the side of shimming
Formula can adjust the depth that fuel injector stretches into chamber, in more true simulated engine in top dead centre between fuel injector and combustion chamber
Distance.
Then Xecl excimer lasers are opened, adjustment reflective mirror Ι and adjustment reflective mirror II make Xecl excimer lasers
Before the laser to beam expanding lens sent out, change the diameter of laser by beam expanding lens, and converge light beam by collimating mirror, most pass through afterwards
Light beam is converted into a branch of light vertical irradiation in spraying by overcompression mirror.Adjusting high-speed motion picture camera and light splitting mirror angle will burn
Before light beam in bullet guides to video camera, prepare for shooting
Air compressor is opened, in two-step supercharging system is simulated, air compressor provides power, the work of simulated exhaust for turbine
With.Boost pressure is made to reach preset value by the control valve adjusted in air compressor
When needing to simulate pressure side bypass, synchronizing signal is sent out to electronic control unit first with computer, electronic control unit controls electricity simultaneously
The unlatching of magnetoelectricity magnet valve II then controls the unlatching of solenoid valve III, piston rapid uplink under the promotion of high pressure gas（For mould
Send out the uplink of piston in motivation）, position sensor judges to reach at baffle ring feedback signal to electronic control unit, automatically controlled list
Member opens fuel injector immediately, and when at this moment Xecl excimer lasers are irradiated to spraying, induced fluorescence agent shines, and at this moment control two is high
Fast video camera is shot, while the data of acquisition system collecting temperature sensor and pressure sensor.
After simulation, all solenoid valves are closed, open vent valve 24, make piston return, are opened in vacuum pumped
Air and spray droplet for next time simulation prepare.
Whirlpool end influence experimentation of the bypass to spray characteristics with the above process similarly, difference lies in closing solenoid valve II,
Opens solenoid valve Ι.
Claims (5)
1. a kind of device simulated two-step supercharging pressure side/whirlpool end bypass and spray characteristics are influenced, which is characterized in that by pressure side
Logical simulation system, variable volume firebomb device and spraying camera system；
The pressure side bypass simulation system includes air compressor（1）, lower pressure stage turbine（3）, hiigh pressure stage turbine（12）, air filter
Clear device（2）, low-pressure stage compressor（4）With hiigh pressure stage compressor（13）；
Air compressor（1）Gas outlet be connected to lower pressure stage turbine（3）Air inlet, lower pressure stage turbine（3）Gas outlet connect
It is connected to hiigh pressure stage turbine（12）Air inlet, close to lower pressure stage turbine（3）Whirlpool end temperature sensor I is equipped at gas outlet（7）With
Whirlpool side pressure force snesor I（8）；Hiigh pressure stage turbine（12）Air inlet and gas outlet between be equipped with whirlpool end bypass branch, by the end of whirlpool
Logical branch road is equipped with solenoid valve I（9）, solenoid valve I（9）With hiigh pressure stage turbine（12）Gas outlet connection side be equipped with whirlpool end temperature
Spend sensor II（10）With whirlpool side pressure force snesor II（11）；Hiigh pressure stage turbine（12）Gas outlet be also connected to and lead to air
Tracheae；
Air cleaner（2）Gas outlet be connected to low-pressure stage compressor（4）Air inlet, low-pressure stage compressor（4）Outlet
Mouth is connected to hiigh pressure stage compressor（13）Air inlet, close to low-pressure stage compressor（4）Temperature sensor I is equipped at gas outlet
（5）With pressure sensor I（6）；Close to hiigh pressure stage compressor（13）Temperature sensor II is equipped at gas outlet（14）It is passed with pressure
Sensor II（15）；Hiigh pressure stage compressor（13）Air inlet and gas outlet between be equipped with pressure side bypass branch, pressure side bypass branch
It is equipped with solenoid valve II（16）, solenoid valve II（16）With hiigh pressure stage compressor（13）The side of gas outlet connection is equipped with pressure sensing
Device III（17）With temperature sensor III（18）；
The lower pressure stage turbine（3）With low-pressure stage compressor（4）It is connected with each other by common axis of rotation, the hiigh pressure stage turbine
（12）With hiigh pressure stage compressor（13）It is connected with each other by common axis of rotation；
The variable volume firebomb device includes cylindric combustion chamber and its internal piston（27）；It is equipped with above combustion chamber
Firebomb upper end cover（34）, firebomb upper end cover（34）Fuel injector is installed（19）, and be equipped with and pass through exhaust pipe（41）It is connected to
Vacuum pump（42）Through-hole and be connected to hiigh pressure stage compressor（13）The through-hole of gas outlet；Bottom of combustion chamber is equipped with bleeder pipe
（25）And air inlet pipe（30）；Air inlet pipe（30）It is connected to the steel cylinder of gas storage（33）, air inlet pipe（30）On be additionally provided with solenoid valve III
（31）And pressure reducing valve（32）；Bleeder pipe（25）It is equipped with vent valve（24）；Sidewall of combustion chamber is equipped with firebomb form Ι and burning
Play form II；The piston（27）The such position sensor in bottom（29）；
The spraying camera system includes spectroscope（22）, Xecl excimer lasers（40）And the high speed for shooting gas phase
Video camera ICCD Ι（21）With for shooting the high-speed motion picture camera ICCD Π of liquid phase（23）；Spectroscope（22）It is placed in firebomb form Ι
Outside, high-speed motion picture camera ICCD Ι（21）With high-speed motion picture camera ICCD Π（23）Focus in spectroscope（22）Upper merging；Xecl standards point
Sub- laser（40）The laser sent out is through reflective mirror Ι（39）With reflective mirror II（38）Reflection, and successively through beam expanding lens（37）, collimation
Mirror（36）A branch of light is converted to, then be irradiated in combustion chamber by firebomb form II with compressional mirror；
Above all of sensor, solenoid valve and high-speed motion picture camera ICCD and fuel injector（19）, air compressor（1）、Xecl
Excimer laser（40）It is all connected to automatically controlled and collecting unit（43）, automatically controlled and collecting unit（43）Receive computer（20）Hair
The control signal gone out realizes the control that oil spout, photography and solenoid valve open and close.
2. the device that simulation two-step supercharging pressure side according to claim 1/whirlpool end bypass influences spray characteristics, feature
It is, the firebomb form Ι is distributed with firebomb form II on chamber wall in 90 ° of angles.
3. the device that simulation two-step supercharging pressure side according to claim 1/whirlpool end bypass influences spray characteristics, feature
It is, the piston（27）Top is ω combustion-chamber shapes；Inner Wall of Combustion Chamber is equipped with for piston（27）The baffle ring of limiting
（26）；Piston（27）Sealing ring is equipped between Inner Wall of Combustion Chamber（28）.
4. a kind of device that spray characteristics are influenced using simulation two-step supercharging pressure side described in claim 1/whirlpool end bypass
Experimental method, which is characterized in that include the following steps：
Step 1：Fluorescer will be filled in fuel tank to be used for simulating diesel spray, adjustment fuel injector stretches into combustion chamber to suitably deeply
Degree；
Step 2：Xecl excimer lasers are opened, reflective mirror Ι and reflective mirror II is adjusted, makes what Xecl excimer lasers were sent out
Before laser to beam expanding lens, change the diameter of laser by beam expanding lens, and light beam is converged by collimating mirror, finally through overcompression
Light beam is converted into a branch of light vertical irradiation in the combustion chamber by mirror；
Step 3：Two high-speed motion picture cameras and spectroscopical angle are adjusted, before the light beam in firebomb is guided to video camera；
Step 4：Air compressor is opened, and adjusting the control valve in air compressor makes boost pressure reach preset value；
Step 5：Solenoid valve II or solenoid valve Ι is controlled to open, then solenoid valve III is controlled to open；
Step 6：When piston stroking upward to precalculated position, control fuel injector, which is opened, generates spraying, due to the induction of fluorescer stimulated light
It shines；
Step 7：Two high-speed cameras of control are shot, while are acquired so the number of temperature sensor and pressure sensor
According to；
Step 8：Close all solenoid valves, open vent valve, make piston return, open air in vacuum pumped combustion chamber and
Spraying dropping liquid.
5. the experiment of device that simulation two-step supercharging pressure side according to claim 4/whirlpool end bypass influences spray characteristics
Method, which is characterized in that in the step 4, if boost pressure is less than default boost pressure, in air compressor control valve according to
It is automatically controlled with the signal that collecting unit is sent out valve to be opened big and improve its power, it is allowed to close to desired value；If boost pressure
Higher than default boost pressure, in air compressor control valve valve is turned down according to the automatically controlled signal sent out with collecting unit and
Reduce its power, be allowed to close to desired value.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810011258.XA CN108152044A (en) | 2018-01-05 | 2018-01-05 | The device and method that simulation two-step supercharging pressure side/whirlpool end bypass influences spray characteristics |
| PCT/CN2019/070087 WO2019134645A1 (en) | 2018-01-05 | 2019-01-02 | Device and method for simulating effect of two-stage supercharging pressure end or turbo end bypass on spray characteristics |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810011258.XA CN108152044A (en) | 2018-01-05 | 2018-01-05 | The device and method that simulation two-step supercharging pressure side/whirlpool end bypass influences spray characteristics |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019134645A1 (en) * | 2018-01-05 | 2019-07-11 | 西华大学 | Device and method for simulating effect of two-stage supercharging pressure end or turbo end bypass on spray characteristics |
| CN110320189A (en) * | 2019-06-27 | 2019-10-11 | 中国科学院力学研究所 | Two phase measuring methods and system during a kind of liquid fuel atomization |
| CN112113770A (en) * | 2020-09-23 | 2020-12-22 | 常州大学 | Volume-variable pressurized constant-volume combustion bomb device |
| CN112943500A (en) * | 2021-03-11 | 2021-06-11 | 西华大学 | Device and method for simulating influence of plateau environment on spraying characteristic of aviation piston engine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111504649B (en) * | 2020-04-15 | 2021-02-09 | 北京理工大学 | Two-stage supercharging system test bed with double combustion chambers and test method |
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| WO2019134645A1 (en) * | 2018-01-05 | 2019-07-11 | 西华大学 | Device and method for simulating effect of two-stage supercharging pressure end or turbo end bypass on spray characteristics |
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| WO2019134645A1 (en) | 2019-07-11 |
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