CN206974694U - A kind of constant volume detonation corrosion chamber that can monitor detonation wave fluctuation behavior - Google Patents
A kind of constant volume detonation corrosion chamber that can monitor detonation wave fluctuation behavior Download PDFInfo
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- CN206974694U CN206974694U CN201720935853.3U CN201720935853U CN206974694U CN 206974694 U CN206974694 U CN 206974694U CN 201720935853 U CN201720935853 U CN 201720935853U CN 206974694 U CN206974694 U CN 206974694U
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Abstract
It the utility model is related to constant volume combustion bomb, and in particular to a kind of constant volume detonation corrosion chamber that can monitor detonation wave fluctuation behavior.The device includes：Constant volume detonation firebomb body；Gas handling system, high-energy ignition system, data acquisition and analysis system, the beneficial effects of the utility model are：When constant volume detonation firebomb system of the present utility model is applied to research engine super detonation during behavioral trait of the detonation wave in combustion chamber, it can be stablized using high energy ignition unit and acetylene/oxygen mixture and produce detonation wave.
Description
Technical field：
It the utility model is related to constant volume combustion bomb, and in particular to a kind of constant volume detonation that can monitor detonation wave fluctuation behavior
Corrosion chamber.
Background technology：
The requirement of energy-saving and emission-reduction is increasingly strict, and internal combustion engine is as main power source, its fuel economy and environmental-protecting performance
Improved constantly.Direct-injection supercharging miniaturization is that spark ignition engine disclosure satisfy that discharge and fuel consumption require important
Approach.However, being improved constantly with the compression ratio and power density of engine, there is strong pinking.Once super detonation is sent out
Raw, its pressure oscillation amplitude is up to even more than 30MPa, and frequency of oscillation will also exceed 10kHz.This strong pinking will easily
Cause the destruction of the combustion-chamber assemblies such as spark plug and piston so that engine can not continuous firing.But piston material destruction needs
It is up to the active force of up to a hundred MPas of pressure, at most just tens MPas of the pressure oscillation observed under strong pinking, then piston
How material is by the not yet final conclusion of strong pinking damage inactivation actually.
The cylinder pressure sensor of real engine is arranged on cylinder cap position, on piston the effect of being under pressure can not obtain, and often
Cylinder pressure sensor measurement range is up to 30MPa, and resonant frequency is less than pressure when 200kHz can not meet strong pinking
Measurement request.Meanwhile on engine pedestal test, strong pinking, which can not stablize, to be produced, and can not be in the work of high-speed motion
Multiple pressure sensors are inserted beyond the Great Wall to monitor the behavioral trait of detonation wave and convergence characteristic in combustion chamber.
The content of the invention：
The utility model passes through high-energy sparking plug direct-fire by devising a set of constant volume detonation firebomb experimental rig
The mode of detonation, by force in a combustion chamber between induce one of detonation wave, then the trajectory pressure by being arranged at diverse location
Sensor, rather than traditional cylinder pressure sensor are special to detect behavioral trait and convergence of the detonation wave in given shape combustion chamber
Property.Concrete technical scheme is as follows：
A kind of constant volume detonation corrosion chamber that can monitor detonation wave fluctuation behavior, the device include：Constant volume detonation
Firebomb body；Gas handling system, for being filled with combustion mixture to the quantitative stationary state of appearance bullet, from acetylene/oxygen or hydrogen/oxygen
Gas is as gaseous mixture；High-energy ignition system, including two parts, it is control cabinet manual firing system and high-energy sparking plug respectively；Number
According to acquisition analysis system, including：4 PCB 119B11 pressure sensors, 4 PCB 402A03 signal amplifiers, 1 PCB
482C05 signals debugging instrument and 1 oscillograph of DLM 2000,4 PCB 119B11 pressure sensors are positioned in combustion chamber
On interior four diverse locations, one is placed on cylinder cap, and the other three is placed on piston face, and particular location is respectively piston
At center, at piston diameter 1/4 and edge.
A kind of method that can monitor detonation wave fluctuation behavior realized on above-mentioned constant volume detonation corrosion chamber, mistake
Journey is as follows：
Step 1：Install constant volume detonation firebomb body, including cylinder cap, piston and cylinder sleeve, bolt torque spanner are tight
Gu；
Step 2：Pressure sensor, spark plug and air intake valve 11 are arranged on constant volume detonation firebomb body；Connection
Data acquisition and analysis system, high-energy ignition system and gas handling system；
Step 3：Pretest inspection constant volume detonation firebomb air-tightness；Air intake valve 11 is opened, by oxygen hose by inserting soon
Joint 16 accesses air intake valve, adjusts intratracheal pressure to 5bar using the pressure reducer on oxygen cylinder, closes air intake valve 11, close
The pressure reducer held one's breath on bottle, disconnect oxygen path；The tracheae of other end closing is accessed into quick plug 16, observes intelligent single loop
Whether measurement and control instrument registration increases, if measurement and control instrument registration is zero not increase, illustrates that the sealing of air valve 11 is intact；Air valve 11 is opened,
Observe whether intelligent single loop measurement and control instrument registration keeps definite value constant, if registration is constant, mounted body air-tightness is good
It is good；
Step 4：Gas washing, discharge the air in combustion chamber, full of oxygen；Oxygen hose is accessed by quick connector 16
Air inlet gas circuit, close pressure relief ball valve 15 and air intake valve 11；Intratracheal pressure is adjusted to 3bar using the pressure reducer on oxygen cylinder,
Air intake valve 11 is opened, enters gas, when intelligent single loop measurement and control instrument shows that pressure registration is constant, closes air intake valve
11, the pressure reducer closed on gas cylinder；Pressure relief ball valve 15 is opened, disconnects oxygen path, air intake valve 11 is opened, gas is discharged；
So in triplicate, gas washing is completed；
Step 5：The pressure of the pure oxygen and acetylene needed for experiment is calculated using partial pressure method；Close pressure relief ball valve 15 and air inlet
Valve 11, acetylene hose is accessed into air intake valve by quick connector 16, adjusted admission pressure using the pressure reducer on acetylene gas bottle
The whole numerical value to needs；Open air intake valve 11, acetylene is filled with combustion chamber, when the registration on measurement and control instrument is constant, close into
Air valve 11, acetylene regulator is closed, open pressure relief ball valve 15, disconnect acetylene gas circuit；
Step 6：Oxygen hose is accessed into gas circuit by quick connector 16, pressure relief ball valve 15 is closed, using on oxygen gas cylinder
The numerical value that admission pressure is adjusted to need by pressure reducer；Open air intake valve 11, when the registration on measurement and control instrument is constant, close into
Air valve 11, pressure reducer is closed, open pressure relief ball valve 15, disconnect oxygen gas circuit；
Step 7：Setting oscillograph is triggering state；
Step 8：The switch on triggering high-energy ignition system control cabinet, high-energy sparking plug discharge manually, are mixed in combustion chamber
The direct detonation of gas；
Step 9：The waveform collected on observation oscilloscope window, it is confirmed whether that detonation occurs, preserves data and set to storage
It is standby；
Step 10：Continuous five repeat steps three arrive step 9, confirm the repeatability of data collected；
Step 11：Experimental data is analyzed, the pressure oscillation curve of diverse location in combustion chamber is obtained, studies detonation wave
Behavioral trait.
One of preferably, the combustion chamber cylinder diameter of the constant volume detonation firebomb body is 75~85mm, and cone angle is
120 °~180 °, cylinder cap shape and piston-shaped all variable, combustion chamber clearance is adjusted with cylinder sleeve, variable from 0~32mm.As excellent
The further preferred scheme of one of scheme is selected, the material of the constant volume detonation firebomb body is stainless steel 1Cr18Ni9Ti.
Preferably two, in the gas handling system, gas component and equivalent proportion are controlled by partial pressure.As excellent
The further preferred scheme of the two of scheme is selected, there is air admission hole, 1~3mm of air admission hole aperture, air inlet on constant volume detonation firebomb body
Valve uses internal thread needle-like stop valve J13W-350P DN6, and outside determines the partial pressure of gaseous mixture each component using pressure transmitter.
Preferably three, the control cabinet manual firing system output voltage is 2500V, and ignition energy is more than
10J。
Preferably four, the resonant frequency of the sensor of the data acquisition and analysis system is higher than 400kHz, on
The liter time is less than 2 μ s, and the DLM2000 oscillographs of the data acquisition and analysis system are used for four groups of pressure signals synchronously and adopted simultaneously
Collection, its frequency acquisition is 625MHz.
The beneficial effects of the utility model are：
(1) super detonation has sporadic and randomness, and destructive power is very big.This causes in engine bed
It is relatively difficult that experiment is done on frame.Constant volume detonation firebomb system of the present utility model is applied to quick-fried during research engine super detonation
When banging behavioral trait of the ripple in combustion chamber, it can be stablized using high energy ignition unit and acetylene/oxygen mixture and produce detonation
Ripple.
(2) on engine pedestal, multiple pressure sensors can not be inserted on the piston of high-speed motion to monitor burning
The behavioral trait of detonation wave and convergence characteristic in room.Constant volume detonation firebomb system of the present utility model can be in piston and cylinder cap
Diverse location the pressure sensor of delicate level response is installed, during finding super detonation, in combustion chamber the position of detonation wave convergence
Put.
(3) relative to using optical engine and rcm, constant volume detonation firebomb structure letter of the present utility model
Single, cost is low.The constant volume combustion bomb of glass window is provided with, due to the limitation of strength of glass, it is impossible to realize strong detonation, this practicality is newly
The constant volume detonation firebomb of type can realize strong detonation.
(4) constant volume detonation firebomb system of the present utility model can be by changing the shape of cylinder cap and piston, to simulate
Combustion chamber of different shapes.By changing the length of cylinder sleeve, to simulate piston in the combustion chamber of diverse location.
Brief description of the drawings：
Fig. 1 is the schematic diagram of the utility model constant volume detonation firebomb；1 represents combustion chamber, and 2 represent piston centre sensing
Device, 3 represent the position sensor of piston diameter 1/4, and 4 represent piston ridge sensor, and 5 represent sensor at cylinder cap, and 6 represent high energy
Spark plug, 7 represent air admission hole, and 8 represent cylinder sleeve, and 9 represent body support, and 10 represent high-strength bolt.
Fig. 2 is the schematic diagram of the utility model constant volume detonation firebomb intake and exhaust gas circuit；11 represent air intake valve, and 12 represent
Pressure transmitter, 13 represent threeway one, and 14 represent threeway two, and 15 represent pressure relief ball valve, and 16 represent snap joint.
Embodiment：
Embodiment：
The utility model is described in further detail below by specific embodiment, embodiment in detail below is only right
The utility model is explained, and does not limit the utility model in any form.
Constant volume detonation firebomb system of the present utility model includes：Constant volume detonation firebomb body, gas handling system, high energy point
Fiery system and data acquisition and analysis system.Concrete composition part is described below：
The constant volume detonation firebomb body, its combustion chamber cylinder diameter are 75~85mm, and cone angle is 120 °~180 °, left and right two
Side is respectively cylinder cap and piston, and the shape of cylinder cap and piston is all variable；Combustion chamber clearance cylinder sleeve 8 adjusts, can from 0mm~32mm
Become；Airframe material is stainless steel 1Cr18Ni9Ti, can bear the pressure of some strength；Cylinder cap center 6 is installed by spark plug, cylinder
One pressure sensor of installation is covered, this installation site 5 and the installation site of cylinder pressure sensor in internal combustion engine are essentially identical；Piston
In center 2, diameter a quarter position 3 and marginal position 4 install pressure sensor respectively；Air inlet is have also been devised on piston
Hole 7；Whole body fastens by 12 uniform M12 high-strength bolts 10.
The gas handling system, it is quick-fried in order to stablize, be readily incorporated into for being filled with combustion mixture to the quantitative stationary state of appearance bullet
Hong ripple, the present embodiment is from acetylene/oxygen as gaseous mixture；Component and equivalent proportion are then controlled by partial pressure；Hold entering on bullet
Air vent aperture is 1~3mm, and intake valve 11 is using internal thread needle-like stop valve J13W-350P DN6；Outside uses pressure transmitter
12 determine the partial pressure of gaseous mixture each component, and pressure registration is shown by intelligent single loop measurement and control instrument.
The high-energy ignition system, including two parts are formed, and are control cabinet and high-energy sparking plug respectively.Pass through control cabinet people
Work is lighted a fire, and ignition system output voltage is 2500V, and ignition energy is more than 10J, it is sufficient to directly puts the quick-fried flammable mixing of acetylene/oxygen
Gas.
The data acquisition and analysis system, put by four PCB 119B11 pressure sensors, four PCB 402A03 signals
Big device, a PCB 482C05 signals debugging instrument and a DLM2000 oscillograph are formed.Wherein four PCB 119B11 pressure pass
Sensor is positioned in combustion chamber on four diverse locations.One is placed on cylinder cap, herein installation site and internal combustion engine middle cylinder
The installation site of pressure sensor is essentially identical.The other three is placed on piston face, particular location is respectively at piston centre,
At piston diameter 1/4 and edge；The resonant frequency of sensor is higher than 400kHz, and the rise time is less than 2 μ s.The oscillographys of DLM 2000
Device is used for four groups of pressure signals synchronously and gathered simultaneously, and its frequency acquisition is up to 625MHz；Sets of data acquisition analysis system foot
To catch the behavioral trait of detonation wave.
The method and step tested using detonation of the present utility model appearance bullet system is as follows：
Step 1：Install constant volume detonation firebomb body, including cylinder cap, piston and cylinder sleeve, bolt torque spanner are tight
Gu；
Step 2：Pressure sensor, spark plug and air intake valve 11 are arranged on body.Connect data collection and analysis system
System, high-energy ignition system and gas handling system；
Step 3：For complete, the pretest inspection constant volume detonation firebomb air-tightness of guarantee test personnel.Open air inlet
Valve 11, oxygen hose is accessed into air intake valve by quick connector 16, intratracheal pressure is adjusted using the pressure reducer on oxygen cylinder
To 5bar, air intake valve 11 is closed, the pressure reducer closed on gas cylinder, disconnects oxygen path；The tracheae of other end closing is accessed
Quick plug 16, observes whether intelligent single loop measurement and control instrument registration increases, if measurement and control instrument registration is zero not increase, illustrates air valve
11 sealings are intact；Air valve 11 is opened, whether observation measurement and control instrument registration keeps definite value constant, if registration is constant, install
Body air-tightness it is good；
Step 4：Gas washing, discharge the air in combustion chamber, full of oxygen.Oxygen hose is accessed by quick connector 16
Air inlet gas circuit, close pressure relief ball valve 15 and air intake valve 11；Intratracheal pressure is adjusted to 3bar using the pressure reducer on oxygen cylinder,
Air intake valve 11 is opened, enters gas, when intelligent single loop measurement and control instrument shows that pressure registration is constant, closes air intake valve
11, the pressure reducer closed on gas cylinder；Pressure relief ball valve 15 is opened, disconnects oxygen path, air intake valve 11 is opened, gas is discharged；
So in triplicate, gas washing is completed；
Step 5：The pressure of the pure oxygen and acetylene needed for experiment is calculated using partial pressure method.Close pressure relief ball valve 15 and air inlet
Valve 11, acetylene hose is accessed into air intake valve by quick connector 16, adjusted admission pressure using the pressure reducer on acetylene gas bottle
The whole numerical value to needs.Open air intake valve 11, acetylene is filled with combustion chamber, when the registration on measurement and control instrument is constant, close into
Air valve 11, acetylene regulator is closed, open pressure relief ball valve 15, disconnect acetylene gas circuit；
Step 6：Oxygen hose is accessed into gas circuit by quick connector 16, pressure relief ball valve 15 is closed, using on oxygen gas cylinder
The numerical value that admission pressure is adjusted to need by pressure reducer；Open air intake valve 11, when the registration on measurement and control instrument is constant, close into
Air valve 11, pressure reducer is closed, open pressure relief ball valve 15, disconnect oxygen gas circuit；
Step 7：Setting oscillograph is triggering state；
Step 8：The switch on triggering high-energy ignition system control cabinet, high-energy sparking plug discharge manually, are mixed in combustion chamber
The direct detonation of gas；
Step 9：The waveform collected on observation oscilloscope window, it is confirmed whether that detonation occurs, preserves data and set to storage
It is standby；
Step 10：Repeat step three arrives step 9 five times, confirms the repeatability of data collected.
Step 11：Experimental data is analyzed, the pressure oscillation curve of diverse location in combustion chamber is obtained, studies detonation wave
Behavioral trait.
This real utility model is not limited to embodiment described above.Description purport to embodiment above
It is in order to describe and illustrate the technical solution of the utility model, without restricted.One of ordinary skill in the art is at this
Under the enlightenment of utility model, in the case where not departing from the utility model aims, many variations can also be made, these are belonged to
Within protection of the present utility model.
Claims (7)
1. a kind of constant volume detonation corrosion chamber that can monitor detonation wave fluctuation behavior, it is characterised in that the device includes：
Constant volume detonation firebomb body；
Gas handling system, for being filled with combustion mixture to the quantitative stationary state of appearance bullet, from acetylene/oxygen or hydrogen/oxygen conduct
Gaseous mixture；
High-energy ignition system, including two parts, it is control cabinet manual firing system and high-energy sparking plug respectively；
Data acquisition and analysis system, including：4 PCB 119B11 pressure sensors, 4 PCB 402A03 signal amplifiers, 1
PCB 482C05 signals debugging instruments and 1 oscillograph of DLM 2000；4 PCB 119B11 pressure sensors are positioned in combustion
Burn on indoor four diverse locations, one is placed on cylinder cap, and the other three is placed on piston face, and particular location is respectively
At piston centre, at piston diameter 1/4 and edge.
2. a kind of constant volume detonation corrosion chamber that can monitor detonation wave fluctuation behavior according to claim 1, it is special
Sign is that the combustion chamber cylinder diameter of the constant volume detonation firebomb body is 75~85mm, and cone angle is 120 °~180 °, cylinder cap shape
With it is piston-shaped all variable, combustion chamber clearance is adjusted with cylinder sleeve, variable from 0~32mm.
3. a kind of constant volume detonation corrosion chamber that can monitor detonation wave fluctuation behavior according to claim 2, it is special
Sign is that the material of the constant volume detonation firebomb body is stainless steel 1Cr18Ni9Ti.
4. a kind of constant volume detonation corrosion chamber that can monitor detonation wave fluctuation behavior according to claim 1, it is special
Sign is, in the gas handling system, gas component and equivalent proportion are controlled by partial pressure.
5. a kind of constant volume detonation corrosion chamber that can monitor detonation wave fluctuation behavior according to claim 4, it is special
Sign is there is air admission hole, 1~3mm of air admission hole aperture on constant volume detonation firebomb body, and intake valve is ended using internal thread needle-like
Valve J13W-350P DN6, outside determine the partial pressure of gaseous mixture each component using pressure transmitter.
6. a kind of constant volume detonation corrosion chamber that can monitor detonation wave fluctuation behavior according to claim 1, it is special
Sign is that the control cabinet manual firing system output voltage is 2500V, and ignition energy is more than 10J.
7. a kind of constant volume detonation corrosion chamber that can monitor detonation wave fluctuation behavior according to claim 1, it is special
Sign is, the resonant frequency of the sensor of the data acquisition and analysis system is higher than 400kHz, and the rise time is less than 2 μ s, described
The oscillographs of DLM 2000 of data acquisition and analysis system are used for four groups of pressure signals synchronously and gathered simultaneously, and its frequency acquisition is
625MHz。
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| CN201720935853.3U CN206974694U (en) | 2017-07-28 | 2017-07-28 | A kind of constant volume detonation corrosion chamber that can monitor detonation wave fluctuation behavior |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107796628A (en) * | 2017-07-28 | 2018-03-13 | 天津大学 | A kind of constant volume detonation corrosion chamber and method that can monitor detonation wave fluctuation behavior |
-
2017
- 2017-07-28 CN CN201720935853.3U patent/CN206974694U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107796628A (en) * | 2017-07-28 | 2018-03-13 | 天津大学 | A kind of constant volume detonation corrosion chamber and method that can monitor detonation wave fluctuation behavior |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180206 Termination date: 20180728 |