CN108458853A - A kind of list drop accelerator - Google Patents
A kind of list drop accelerator Download PDFInfo
- Publication number
- CN108458853A CN108458853A CN201810207238.XA CN201810207238A CN108458853A CN 108458853 A CN108458853 A CN 108458853A CN 201810207238 A CN201810207238 A CN 201810207238A CN 108458853 A CN108458853 A CN 108458853A
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- China
- Prior art keywords
- cylinder
- jet pipe
- ducted fan
- drop
- list
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Links
- 238000007599 discharging Methods 0.000 claims abstract description 14
- 241000883990 Flabellum Species 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 230000001413 cellular effect Effects 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 2
- 239000000446 fuel Substances 0.000 abstract description 7
- 238000002485 combustion reaction Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000002347 injection Methods 0.000 abstract description 5
- 239000007924 injection Substances 0.000 abstract description 5
- 238000011160 research Methods 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000001133 acceleration Effects 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- 239000010721 machine oil Substances 0.000 description 3
- 238000005474 detonation Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The present invention relates to internal combustion engine direct injection technology fields, and in particular to a kind of list drop accelerator.The technical problem to be solved in the present invention is to provide a kind of single drop accelerators, fill up the blank that fuel colliding wall experimental study high speed drop hits wall research.A kind of list drop accelerator, including：Cylinder, ducted fan, single droplet discharging head, jet pipe；The cylinder is uprightly placed, and barrel top installs ducted fan, and stack shell bottom installs jet pipe, single droplet discharging head is installed in the middle part of cylinder.The advantageous effect of the present invention compared with the existing technology：Ducted fan wind-force size can be controlled by machine governor and power supply, and fan wind-force is bigger, and drop accelerates more apparent.It therefore, can be under the premise of not changing "T"-shaped needle support position, by adjusting the big minor adjustment list liquid drop speed of fan wind-force.
Description
Technical field：
The present invention relates to internal combustion engine direct injection technology fields, and in particular to a kind of list drop accelerator.
Background technology：
From the point of view of world wide, gasoline engine is still the most important dynamic origin of passenger car.It is limited to high fuel economy
With low emission requirement, in-cylinder direct-jet cooperates with small-sized reinforcement technique that will be studied as gasoline engine in significant period of time from now on
Hot spot.However as injection pressure increase and the reinforcement of trend toward miniaturization, the phenomenon that fuel impingement wall surface, are inevitable.It hits
The fuel oil hit in top land forms oil film, forms pool fires in combustion, is that direct fuel-injection engine soot is mainly given birth to
At source.The fuel oil impinged upon on casing wall is mixed with machine oil, dilute lubricating oil, and the fretting wear between moving component is made to increase.
Even more serious, fuel impingement can make machine oil form early combustion because of the low and easy spontaneous combustion of machine oil burning point off into combustion chamber from wall surface
Phenomenon induces surface ignition and super detonation, seriously affects engine performance.
It is lured as it can be seen that the fuel colliding wall phenomenon in directly jetting gasoline engine is the main of Particulate Emission, oil dilution and super detonation
Because, and by stepping up and getting worse with the following injection system pressure, have become further increase engine at present
The efficiency key restriction factors granular material discharged with reduction.And the key to solve the above problems is research fuel droplets collision wall surface
Mechanism and its influence factor.
In recent years, domestic and international researcher hits wall to fuel oil list drop and has carried out numerous studies, it is intended to disclose drop and hit wall
Development behind face and Cracking Mechanism.However, experiment at present, which usually relies on single drop freely falling body, makes its acceleration, speed before wall surface is hit
Degree is usually no more than 4m/s, differs larger with liquid drop speed in actual engine.The condition that is put to the test limits, and high speed drop hits wall
Research is only capable of relying on operating automation.It is therefore desirable to provide a kind of single drop accelerator, experiment high speed liquid is filled up
Drop hits the blank of wall research.
Invention content：
The technical problem to be solved in the present invention is to provide a kind of single drop accelerators, fill up in fuel colliding wall experimental study
High speed drop hits the blank of wall research.
To solve the above problems, the present invention uses following proposal：
A kind of list drop accelerator, including：Cylinder 2, ducted fan 1, single droplet discharging head 4, jet pipe 6；The cylinder is straight
It stands up and sets, barrel top installs ducted fan, and jet pipe, the single droplet discharging head of middle part installation of cylinder are installed in the stack shell bottom of stack shell.
As the first preferred embodiment, the list droplet discharging head includes："T"-shaped needle support, hollow pinhead；" T "
Shape needle support is hollow, symmetrical along cylinder axis；"T"-shaped needle support center vertical pipeline is used for installing hollow pinhead；
The transverse port of "T"-shaped needle support connects fluid path.Preferably, the section of the "T"-shaped needle support vertically is to spin
Capitate reduces windage, reduces the influence to air-flow.It is further preferred that cylinder wall surface interior smooth, barrel top to middle and lower part
Twice vertical slots are opened, about cylinder axis central symmetry, slot is interior to be used for installing "T"-shaped needle support twice vertical slots.
As second of preferred embodiment, further include：Diversion pipe 3 between ducted fan and single droplet discharging head, it is described
Diversion pipe outer profile is cylinder, and diameter is equal with barrel bore, diversion pipe built-in cellular duct, and each honeycomb ducts are transversal
Face is identical, and each duct axis vertical is downward.Preferably, each honeycomb ducts cross section is regular hexagon.
As the third preferred embodiment, the jet pipe air inlet is mounted on cylinder lower edge, and there are three types of shapes for jet pipe, respectively
For gradual shrinkage, flaring type and scaling type.According to gas flow equation in jet pipe,Make gas in jet pipe
Stream accelerates, as Mach number M<When 1, jet pipe should be gradual shrinkage, i.e. dA<0；Work as M>When 1, jet pipe should be flaring type, i.e. dA>0；Work as gas
When stream increases to supersonic speed by subsonic speed, jet pipe should be scaling type.
As the 4th kind of preferred embodiment, the ducted fan includes：Duct 11, motor 13, flabellum 12；Duct is internally provided with
Motor fixing frame 111, motor are fixed at duct center by motor fixing frame, and motor output end connects flabellum；Duct wind
It is equal with cylinder air inlet bore to be fanned out to air port diameter, wind export direction face cylinder, ducted fan wind-force is adjustable, and wind-force size is by electricity
Machine governor and power supply control.
The advantageous effect of the present invention compared with the existing technology：
(1) ducted fan wind-force size can be controlled by machine governor and power supply, and fan wind-force is bigger, and drop acceleration is got over
Obviously.It therefore, can be under the premise of not changing "T"-shaped needle support position, by adjusting the big minor adjustment list drop speed of fan wind-force
Degree.
(2) in embodiment, "T"-shaped needle support can move up and down in cylinder vertical slots, change single drop in cylinder
The distance of interior acceleration, distance is bigger, accelerates more apparent.Therefore, can pass through under the premise of not changing ducted fan wind-force size
It adjusts " T " needle support position and adjusts single liquid drop speed.
(3) in embodiment, the diversion pipe that honeycomb cross-sectional cell is carried in cylinder can make air-flow reach "T"-shaped syringe needle branch
Become laminar flow when frame, is conducive to single drop and is detached from after syringe needle in cylinder with stable motion route, single drop is contributed to go out spray
Guan Hou, rum point are fixed, convenient for follow-up shooting.
(4) in embodiment, there are three types of shapes for jet pipe：Gradual shrinkage, flaring type and scaling type.When air velocity in jet pipe
When less than local wind speed, using gradual shrinkage jet pipe；When wind speed is more than local wind speed in jet pipe jet pipe, using flaring type jet pipe.
Using jet pipe, wind velocity can be made further to increase, be conducive to drop speedup.
Description of the drawings：
Fig. 1 is the assembling schematic diagram of single drop accelerator in the embodiment of the present invention；In figure, 1 represents ducted fan, and 2
Cylinder is represented, 3 represent diversion pipe, and 4 represent needle support, and 5 represent syringe needle, and 6 represent jet pipe.
Fig. 2 is the exploded perspective view of Fig. 1；In figure, 2 represent cylinder, and 3 represent diversion pipe, and 4 represent needle support, and 5 represent
Syringe needle, 6 represent jet pipe, and 11 represent duct, and 12 represent flabellum, and 13 represent motor.
Fig. 3 is ducted fan exploded perspective view in embodiment；12 represent flabellum, and 13 represent motor.
Fig. 4 is ducted fan fixed rack structure schematic diagram in embodiment；In figure, 111 represent motor fixing frame.
Fig. 5 is needle support structural schematic diagram.
Fig. 6 is the front view of Fig. 5.
Fig. 7 is Fig. 6 along A-A sectional views.
Fig. 8 is Fig. 6 along B-B sectional views.
Fig. 9 is Fig. 7 along C-C sectional views.
Figure 10 is draft tube structure schematic diagram in the embodiment of the present invention.
Figure 11 is Figure 10 along A-A sectional views.
Figure 12 is gradual shrinkage nozzle structure schematic diagram in inventive embodiments.
Figure 13 is flaring type nozzle structure schematic diagram in inventive embodiments.
Figure 14 is scaling type nozzle structure schematic diagram in inventive embodiments.
Specific implementation mode：
Embodiment：
In conjunction with Fig. 1-14, illustrate embodiments of the present invention.
A kind of list drop accelerator, including：Cylinder 2, ducted fan 1, single droplet discharging head 4, jet pipe 6, diversion pipe 3；Institute
Cylinder to be stated uprightly to place, barrel top installs ducted fan, and stack shell bottom installs jet pipe, single droplet discharging head is installed in the middle part of cylinder,
The diversion pipe 3 is located between ducted fan and single droplet discharging head；
It is described list droplet discharging head include："T"-shaped needle support, hollow pinhead；The "T"-shaped needle support is hollow, along circle
Cylinder axis is symmetrical；"T"-shaped needle support center vertical pipeline is used for installing hollow pinhead；"T"-shaped needle support it is hollow
Pipeline places syringe pump infusion tube, and hose one end is directly connect with hollow pinhead, and the hose other end connects fluid path, the present embodiment
Middle fluid path is gasoline passage；The section of the "T"-shaped needle support vertically is spindle, reduces windage, is reduced to gas
The influence of stream；Cylinder wall surface interior smooth, barrel top to middle and lower part open twice vertical slots, and twice vertical slots are about cylinder axis
Central symmetry, slot is interior to be used for installing "T"-shaped needle support.
The diversion pipe outer profile is cylinder, and diameter is equal with barrel bore, diversion pipe built-in cellular duct, each
Honeycomb ducts cross section is identical and is regular hexagon, and each duct axis vertical is downward；This structure laminar condition of diversion pipe is good,
It is small by turbulent flow interference, become laminar winds as possible before the turbulent wind that fan is blown can be made to reach hollow pinhead.
The jet pipe air inlet is mounted on cylinder lower edge, and there are three types of shapes, respectively gradual shrinkage, flaring type and contracting for jet pipe
Put type.According to gas flow equation in jet pipe,Air-flow in jet pipe is set to accelerate, as Mach number M<1
When, jet pipe should be gradual shrinkage, i.e. dA<0；Work as M>When 1, jet pipe should be flaring type, i.e. dA>0；When air-flow increases to Supersonic by subsonic speed
When fast, jet pipe should be scaling type.The present embodiment ducted fan wind speed is subsonic speed, therefore uses gradual shrinkage jet pipe.
The ducted fan includes：Duct 11, motor 13, flabellum 12；Duct is internally provided with motor fixing frame 111, motor
It is fixed at duct center by motor fixing frame, motor output end connects flabellum；Ducted fan outlet air bore and cylinder into
Air port diameter is equal, and wind export direction face cylinder, ducted fan wind-force is adjustable, and wind-force size is by machine governor and power supply control
System.
Claims (9)
1. a kind of list drop accelerator, which is characterized in that including：Cylinder (2), ducted fan (1), single droplet discharging head (4), spray
It manages (6)；The cylinder is uprightly placed, the top installation ducted fan of cylinder, the stack shell bottom installation jet pipe of cylinder, in cylinder
The single droplet discharging head of portion's installation.
2. a kind of single drop accelerator according to claim 1, which is characterized in that the list droplet discharging head includes：It is "T"-shaped
Needle support, hollow pinhead；The "T"-shaped needle support is hollow, symmetrical along cylinder axis；Among "T"-shaped needle support
Vertical pipeline is used for installing hollow pinhead；The transverse port of "T"-shaped needle support connects fluid path.
3. a kind of single drop accelerator according to claim 2, which is characterized in that the "T"-shaped needle support is along vertical
The section in direction is spindle, reduces windage, reduces the influence to air-flow.
4. a kind of single drop accelerator according to claim 3, which is characterized in that cylinder wall surface interior smooth, cylinder top
Twice vertical slots are opened in portion to middle and lower part, and about cylinder axis central symmetry, slot is interior to be used for installing "T"-shaped syringe needle branch twice vertical slots
Frame.
5. a kind of single drop accelerator according to claim 1, which is characterized in that further include：Positioned at ducted fan and list
Diversion pipe (3) between droplet discharging head, the diversion pipe outer profile are cylinder, and diameter is equal with barrel bore, diversion pipe
Built-in cellular duct, each honeycomb ducts cross section is identical, and each duct axis vertical is downward.
6. a kind of single drop accelerator according to claim 5, which is characterized in that each honeycomb ducts cross section is
Regular hexagon.
7. according to a kind of list drop accelerator described in claim 1-6 any one, which is characterized in that the jet pipe air inlet
Mounted on cylinder lower edge, there are three types of shapes, respectively gradual shrinkage, flaring type and scaling type for jet pipe.
8. a kind of single drop accelerator according to claim 7, which is characterized in that according to gas flow equation in jet pipe,Air-flow in jet pipe is set to accelerate, as Mach number M<When 1, jet pipe should be gradual shrinkage, i.e. dA<0；Work as M>
When 1, jet pipe should be flaring type, i.e. dA>0；When air-flow increases to supersonic speed by subsonic speed, jet pipe should be scaling type.
9. according to a kind of list drop accelerator described in claim 1-6 any one, which is characterized in that the ducted fan packet
It includes：Duct (11), motor (13), flabellum (12)；Duct is internally provided with motor fixing frame (111), and motor passes through motor fixing frame
It is fixed at duct center, motor output end connects flabellum；Ducted fan outlet air bore is equal with cylinder air inlet bore, and wind goes out
Mouth direction face cylinder, ducted fan wind-force is adjustable, and wind-force size is controlled by machine governor and power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810207238.XA CN108458853A (en) | 2018-03-14 | 2018-03-14 | A kind of list drop accelerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810207238.XA CN108458853A (en) | 2018-03-14 | 2018-03-14 | A kind of list drop accelerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108458853A true CN108458853A (en) | 2018-08-28 |
Family
ID=63219954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810207238.XA Pending CN108458853A (en) | 2018-03-14 | 2018-03-14 | A kind of list drop accelerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108458853A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060187277A1 (en) * | 2005-02-22 | 2006-08-24 | Synergy Innovations, Inc. | Method and apparatus for forming high-speed liquid |
| CN104729792A (en) * | 2015-02-15 | 2015-06-24 | 北京航空航天大学 | Measuring device for high-speed multi-direction impact loads of liquid drips |
| CN105891206A (en) * | 2016-04-05 | 2016-08-24 | 北京航空航天大学 | Controllable supercooled liquid drop continuous impact microcosmic observation system |
| CN106228875A (en) * | 2016-09-29 | 2016-12-14 | 河海大学常州校区 | A kind of droplet impact liquid film visualized experiment platform and using method thereof |
| CN106885686A (en) * | 2017-03-20 | 2017-06-23 | 华中科技大学 | A kind of drop hits at a high speed the experimental rig of wall |
| CN106989933A (en) * | 2017-06-02 | 2017-07-28 | 北京理工大学 | A kind of rebuffed experimental provision of drop and method |
| CN207866465U (en) * | 2018-03-14 | 2018-09-14 | 天津大学 | A kind of wind driving fuel oil list drop accelerator |
-
2018
- 2018-03-14 CN CN201810207238.XA patent/CN108458853A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060187277A1 (en) * | 2005-02-22 | 2006-08-24 | Synergy Innovations, Inc. | Method and apparatus for forming high-speed liquid |
| CN104729792A (en) * | 2015-02-15 | 2015-06-24 | 北京航空航天大学 | Measuring device for high-speed multi-direction impact loads of liquid drips |
| CN105891206A (en) * | 2016-04-05 | 2016-08-24 | 北京航空航天大学 | Controllable supercooled liquid drop continuous impact microcosmic observation system |
| CN106228875A (en) * | 2016-09-29 | 2016-12-14 | 河海大学常州校区 | A kind of droplet impact liquid film visualized experiment platform and using method thereof |
| CN106885686A (en) * | 2017-03-20 | 2017-06-23 | 华中科技大学 | A kind of drop hits at a high speed the experimental rig of wall |
| CN106989933A (en) * | 2017-06-02 | 2017-07-28 | 北京理工大学 | A kind of rebuffed experimental provision of drop and method |
| CN207866465U (en) * | 2018-03-14 | 2018-09-14 | 天津大学 | A kind of wind driving fuel oil list drop accelerator |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180828 |