CN107917810A - A kind of experimental rig and method that can monitor detonation wave effect lower piston material temperature change - Google Patents
A kind of experimental rig and method that can monitor detonation wave effect lower piston material temperature change Download PDFInfo
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- CN107917810A CN107917810A CN201710629623.9A CN201710629623A CN107917810A CN 107917810 A CN107917810 A CN 107917810A CN 201710629623 A CN201710629623 A CN 201710629623A CN 107917810 A CN107917810 A CN 107917810A
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- 238000005474 detonation Methods 0.000 title claims abstract description 56
- 239000000463 material Substances 0.000 title claims abstract description 25
- 230000008859 change Effects 0.000 title claims abstract description 24
- 230000000694 effects Effects 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000002485 combustion reaction Methods 0.000 claims abstract description 30
- 229910052751 metal Inorganic materials 0.000 claims abstract description 29
- 239000002184 metal Substances 0.000 claims abstract description 29
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 44
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 29
- 239000001301 oxygen Substances 0.000 claims description 29
- 229910052760 oxygen Inorganic materials 0.000 claims description 29
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 22
- 239000003638 chemical reducing agent Substances 0.000 claims description 22
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 22
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 22
- 238000005259 measurement Methods 0.000 claims description 16
- 229910052697 platinum Inorganic materials 0.000 claims description 11
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 10
- 229910000838 Al alloy Inorganic materials 0.000 claims description 8
- 229910001882 dioxygen Inorganic materials 0.000 claims description 7
- 239000008246 gaseous mixture Substances 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 6
- 230000006378 damage Effects 0.000 claims description 5
- 238000002474 experimental method Methods 0.000 claims description 5
- 238000010304 firing Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 4
- 239000004519 grease Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 238000005192 partition Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000956 alloy Substances 0.000 description 6
- 230000002779 inactivation Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization 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
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/042—Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12
- G01M15/048—Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12 by monitoring temperature
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/022—Means for indicating or recording specially adapted for thermometers for recording
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The present invention relates to constant volume combustion bomb, and in particular to a kind of experimental rig and method that can monitor detonation wave effect lower piston material temperature change.The device includes：Constant volume detonation firebomb body, cylinder cap, cylinder sleeve；Metal partion (metp) in constant volume detonation firebomb body, metal partion (metp) and cylinder cap, cylinder sleeve composition combustion chamber；Gas handling system；High-energy ignition system；Temperature measurement system.The beneficial effects of the invention are as follows：The present invention utilizes constant volume detonation firebomb system, can stablize generation detonation, while metal partion (metp) replaces piston, can on metal partion (metp) mounting temperature sensor, the thermo parameters method of test specimen can be measured.
Description
Technical field：
The present invention relates to constant volume combustion bomb, and in particular to one kind can monitor detonation wave effect lower piston material temperature change
Experimental rig and method.
Background technology：
With the continuous improvement of compression ratio of internal-combustion engine and power density, there is strong pinking.The yield-to-weight ratio of strong pinking
Conventional knock is much larger, once occur that combustion chamber components damage inactivation will be made.Strong pinking has become compression ratio of internal-combustion engine
The major obstacle further improved with power density.Continuous break et al. is sent out by the experiment of constant volume detonation firebomb and numerical simulation study
Existing, for vertex of a cone type combustion chamber, detonation wave can produce convergence in piston centre position, and convergence pressure is adopted considerably beyond cylinder cap position
The pressure collected.When strong pinking occurs, the convergence effect of detonation wave is a critically important reason of piston damage inactivation.It is but same
When material intensity and temperature relation it is very big, in order to further disclose the mechanism of piston damage inactivation when strong pinking occurs,
Need to monitor the temperature change that detonation wave acts on lower piston material.
On engine pedestal test, strong pinking can not stablize generation, and can not be inserted on the piston of high-speed motion
The temperature change of detonation wave effect lower piston diverse location when filling multiple temperature sensors to monitor strong pinking.
The content of the invention：
Detonation wave effect lower piston material difference position when the pilot system of the present invention with method is to monitor strong pinking
The temperature change put.For this reason, the present invention devises this set constant volume detonation firebomb experimental rig.Its vertex of a cone type cavity shape with it is interior
Combustion engine combustion-chamber shape is essentially identical.By way of high-energy sparking plug direct-fire is detonated, by force in a combustion chamber between induce
Detonation when going out one of detonation wave, then the temperature sensor at diverse location is arranged on piston to monitor strong pinking by three
Ripple acts on the temperature change of lower piston diverse location.Concrete technical scheme is as follows：
A kind of experimental rig that can monitor detonation wave effect lower piston material temperature change, the device include：Constant volume is quick-fried
Hong firebomb body, cylinder cap, cylinder sleeve；Metal partion (metp) in constant volume detonation firebomb body, metal partion (metp) and cylinder cap, cylinder sleeve
Form combustion chamber；Gas handling system, is filled with combustion mixture for quantifying stationary state to appearance bullet, selects acetylene/oxygen or hydrogen/oxygen
Gas is as gaseous mixture；High-energy ignition system, including two parts, are control cabinet manual firing system and high-energy sparking plug respectively；Temperature
Measuring system is spent, including：3 temperature sensors, temperature measurer and host computer；The temperature sensor, temperature range -50~250
DEG C, accuracy ± 0.01 DEG C；Three temperature points are taken on metal partion (metp), respectively marginal position sensor 7, a quarter position
Put sensor 8 and center sensor 9.
A kind of method that can monitor detonation wave effect lower piston material temperature change realized on above-mentioned experimental rig,
Process is as follows：
Step 1：Constant volume detonation firebomb body is installed, including cylinder cap, metal partion (metp) and cylinder sleeve, bolt are pulled with torque
It is hand-tight solid；
Step 2：By marginal position sensor 7, a quarter position sensor 8, center sensor 9, spark plug 10
It is installed on air intake valve 13 on constant volume detonation firebomb body；Connect temperature measurement system, high-energy ignition system and air inlet system
System；
Step 3：Pretest inspection constant volume detonation firebomb air-tightness；Air intake valve 13 is opened, by oxygen hose by inserting soon
Connector 18 accesses air intake valve, adjusts intratracheal pressure to 5bar using the pressure reducer on oxygen cylinder, closes air intake valve 13, close
The pressure reducer held one's breath on bottle, disconnects oxygen path；The tracheae of other end closing is accessed into quick plug 18, observes intelligent single loop
Whether measurement and control instrument registration increases, if measurement and control instrument registration is zero not increase, illustrates air intake valve, 13 leakproofness are intact；Open into
Whether air valve 13, observation measurement and control instrument registration keep definite value constant, if registration is constant, mounted body air-tightness is good
It is good；
Step 4：Setting temperature measurer is acquisition state；
Step 5：Gas washing, makes the indoor air discharge of burning, full of oxygen；Oxygen hose is accessed by quick connector 18
Air inlet gas circuit, closes pressure relief ball valve 17 and air intake valve 13；Intratracheal pressure is adjusted to 3bar using the pressure reducer on oxygen cylinder,
Air intake valve 13 is opened, enters gas, when intelligent single loop measurement and control instrument shows that pressure registration is constant, closes air intake valve
13, close the pressure reducer on gas cylinder；Pressure relief ball valve 17 is opened, disconnects oxygen path, air intake valve 13 is opened, gas is discharged；
So in triplicate, gas washing is completed；
Step 6：The pressure of the pure oxygen and acetylene needed for experiment is calculated using partial pressure method；Close pressure relief ball valve 17 and air inlet
Valve 13, air intake valve is accessed by acetylene hose by quick connector 18, using the pressure reducer on acetylene gas bottle by admission pressure tune
The whole numerical value to needs；Air intake valve 13 is opened, acetylene is filled with combustion chamber, closes air intake valve 13, closes acetylene regulator,
Pressure relief ball valve 17 is opened, disconnects acetylene gas circuit；
Step 7：Oxygen hose is accessed into gas circuit by quick connector 18, pressure relief ball valve 17 is closed, using on oxygen gas cylinder
The numerical value that admission pressure is adjusted to need by pressure reducer；Open air intake valve 13, when the registration on measurement and control instrument is constant, close into
Air valve 13, closes pressure reducer, opens pressure relief ball valve 17, disconnects oxygen gas circuit；
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：Continuous five repeat steps five arrive step 8, and continuous monitoring temperature change, preserves experimental data；
Step 10：Experimental data is analyzed, obtains the temperature curve of three positions on metal partion (metp), so as to analyze piston destruction
Mechanism.
One of preferably, the temperature sensor selects platinum resistance temperature sensor.One of preferably
Further preferred scheme, for the platinum resistance temperature sensor by the way of being mounted directly, platinum resistance protective case passes through end cap,
And punched at the metal partion (metp) back side, heat-conducting silicone grease has been coated in hole, the temperature-sensitive section of temperature sensor is inserted into hole, temperature passes
The temperature-sensitive segment length of sensor is 5~6mm, and the temperature acquisition cycle is 1s.
Preferably two, the material selection aluminium alloy of metal partion (metp).
Preferably three, the combustion chamber cylinder diameter of the constant volume detonation firebomb body is 75~85mm, and cone angle is
120 °~180 °, combustion chamber clearance is adjusted with cylinder sleeve, variable from 0~32mm.The further preferred side of three preferably
Case, the material of the constant volume detonation firebomb body is stainless steel 1Cr18Ni9Ti.
Preferably four, in the gas handling system, gas component and equivalent proportion are controlled by partial pressure.As excellent
The further preferred scheme of the four 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 shut-off valve J13W-350P DN6, and outside determines point of gaseous mixture each component using pressure transmitter
Pressure.
Preferably five, the control cabinet manual firing system output voltage is 2500V, and ignition energy is more than
10J。
The beneficial effects of the invention are as follows：
(1) in operation process, the temperature change of its piston can not measure engine.The present invention is quick-fried using constant volume
Hong firebomb system, can stablize generation detonation, while metal partion (metp) replaces piston, and temperature biography can be installed on metal partion (metp)
Sensor.
(2) three diverse locations of the present invention on metal partion (metp) are mounted with temperature sensor, can measure the temperature of test specimen
Spend field distribution.
Brief description of the drawings：
Fig. 1 is the schematic diagram of constant volume detonation firebomb of the present invention；1 represents combustion chamber, and 2 represent cylinder cap, and 3 represent end cap, 4 generations
Table metal partion (metp), 5 represent cylinder sleeve one, and 6 represent cylinder sleeve two, and 7 represent edge position sensor, and 8 represent a quarter position sensing
Device, 9 represent center sensor, and 10 represent high-energy sparking plug, and 11 represent air admission hole, and 12 represent bolt hole.
Fig. 2 is the schematic diagram of constant volume detonation firebomb air inlet gas circuit of the present invention；13 represent air intake valve, and 14 representative pressures become
Device is sent, 15 represent threeway one, and 16 represent threeway two, and 17, which represent pressure relief ball valve 18, represents quick coupling.
Fig. 3 is the structural profile illustration of metal partion (metp).
Embodiment：
Embodiment：
The present invention is described in further detail below by specific embodiment, embodiment in detail below is only to this hair
It is bright to be explained, and the invention is not limited in any way.
The constant volume detonation firebomb system of the present invention includes：Constant volume detonation firebomb body, gas handling system, high-energy ignition system
System and temperature measurement system.Concrete composition part is described below：
The constant volume detonation firebomb body, body are made of stainless steel material 1Cr18Ni9Ti.Its combustion-chamber shape can
Become, 1 is vertex of a cone type combustion chamber, and cavity shape and combustion in IC engine chamber shape are essentially identical, and combustion chamber cylinder diameter is 75~85mm, cone
Angle is 120 °~180 °, and clearance is changed by the length of cylinder sleeve 5, variable from 0mm~32mm.The metal partion (metp) of aluminum alloy material
4, which are fixed on appearance, plays in combustion chamber.The metal partion (metp) 4 of cylinder cap 2, cylinder sleeve 5 and aluminum alloy material constitutes combustion chamber, by aluminium alloy material
The metal partion (metp) of matter is considered as piston.Three temperature points are taken on the metal partion (metp) of aluminum alloy material, are respectively that marginal position passes
Sensor 7, piston diameter a quarter position sensor 8 and center sensor 9；
The gas handling system, combustion mixture is filled with for quantifying stationary state to appearance bullet.In order to stabilization, be readily incorporated into it is quick-fried
Hong ripple, the present embodiment select acetylene/oxygen as gaseous mixture.Component and equivalent proportion are then controlled by partial pressure.Hold bullet on into
11 aperture of stomata is 1~3mm, and air intake valve uses internal thread needle-like shut-off valve J13W-350P DN6.Outside uses pressure inverting
Device determines 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 10 respectively.Pass through control cabinet
Manual firing, ignition system output voltage are 2500V, and ignition energy is more than 10J, it is sufficient to it is flammable mixed directly to put quick-fried acetylene/oxygen
Close gas.
The temperature measurement system, including platinum resistance temperature sensor, temperature measurer and host computer.Resistance selects platinum resistance temperature
Spend sensor, temperature range -50~250 DEG C, accuracy ± 0.01 DEG C.Customization platinum resistance is required according to installation dimension.In order to protect
The effective sealing of card, by the way of being mounted directly, platinum resistance protective case passes through end cap, and is punched in aluminum-alloyed back surface, makes temperature
The temperature-sensitive section of degree sensor is inserted into hole, and platinum resistance temperature-sensitive segment length is 5~6mm.In order to ensure effectively to conduct heat, coated in hole
Heat-conducting silicone grease.Temperature measurer thermometric accuracy gamut ± 0.01 DEG C, collection period 1s.Position machine operation can to experiment number into
Row real time monitoring storage.
The method and step for holding bullet system progress piston material failure test using the detonation of the present invention is as follows：
Step 1：Constant volume detonation firebomb body, including the metal partion (metp) of cylinder cap, aluminum alloy material, cylinder sleeve etc. are installed,
Bolt is fastened with torque spanner；
Step 2：By marginal position sensor 7, piston diameter a quarter position sensor 8, center sensor 9,
Spark plug 10 and air intake valve 13 are installed on body, connect temperature measurement 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 13, air intake valve is accessed by oxygen hose by quick connector 18, and intratracheal pressure is adjusted using the pressure reducer on oxygen cylinder
To 5bar, air intake valve 13 is closed, closes the pressure reducer on gas cylinder, disconnects oxygen path.The tracheae of other end closing is accessed
Quick plug 18, observes whether intelligent single loop measurement and control instrument registration increases, if intelligent single loop measurement and control instrument registration is zero not increase
Greatly, illustrate that 13 leakproofness of air valve is intact.Air valve 13 is opened, observes whether intelligent single loop measurement and control instrument registration keeps definite value constant,
If registration is constant, mounted body air-tightness is good；
Step 4：Setting temperature measurer is acquisition state；
Step 5：Gas washing, makes the indoor air discharge of burning, full of oxygen.Oxygen hose is accessed by quick connector 18
Air inlet gas circuit, closes pressure relief ball valve 17 and air intake valve 13.Intratracheal pressure is adjusted to 3bar using the pressure reducer on oxygen cylinder,
Air intake valve 13 is opened, enters gas, when intelligent single loop measurement and control instrument shows that pressure registration 3bar is constant, closes intake valve
Door 13, closes the pressure reducer on gas cylinder.Pressure relief ball valve 17 is opened, disconnects oxygen path, air intake valve 13 is opened, gas is arranged
Go out.So in triplicate, gas washing is completed；
Step 6：The pressure of the pure oxygen and acetylene needed for experiment is calculated using partial pressure method.Close pressure relief ball valve 17 and air inlet
Valve 13, air intake valve is accessed by acetylene hose by quick connector 18, using the pressure reducer on acetylene gas bottle by admission pressure tune
The whole numerical value to needs；Air intake valve 13 is opened, acetylene is filled with combustion chamber, closes air intake valve 13, closes acetylene regulator,
Pressure relief ball valve 17 is opened, disconnects acetylene gas circuit；
Step 7：Oxygen hose is accessed into gas circuit by quick connector 18, pressure relief ball valve 17 is closed, using on oxygen gas cylinder
The numerical value that admission pressure is adjusted to need by pressure reducer；Open air intake valve 13, when the registration on measurement and control instrument is constant, close into
Air valve 13, closes pressure reducer, opens pressure relief ball valve 17, disconnects oxygen gas circuit；
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：Repeat step five arrives step 8, and continuous monitoring temperature change, preserves experimental data to computer；
Step 10：Experimental data is analyzed, obtains the temperature curve of three positions on the metal partion (metp) of aluminum alloy material, and then
Analyze the mechanism that piston destroys.
The invention of this reality is not limited to embodiment described above.The description to embodiment is intended to above
In order to describe and illustrate technical scheme, without restricted.Those of ordinary skill in the art open the present invention's
Under showing, without deviating from the spirit of the invention, many variations can also be made, these belong to the present invention protection it
It is interior.
Claims (10)
- A kind of 1. experimental rig that can monitor detonation wave effect lower piston material temperature change, it is characterised in that the device bag Include：Constant volume detonation firebomb body, cylinder cap, cylinder sleeve；Metal partion (metp) in constant volume detonation firebomb body, metal partion (metp) With cylinder cap, cylinder sleeve composition combustion chamber；Gas handling system, is filled with combustion mixture for quantifying stationary state to appearance bullet, selects acetylene/oxygen or hydrogen/oxygen conduct Gaseous mixture；High-energy ignition system, including two parts, are control cabinet manual firing system and high-energy sparking plug respectively；Temperature measurement system, including：3 temperature sensors, temperature measurer and host computer；The temperature sensor, temperature range -50 ~250 DEG C, accuracy ± 0.01 DEG C；Three temperature points are taken on metal partion (metp), are respectively marginal position sensor (7), it is living Fill in diameter a quarter position sensor (8) and center sensor (9).
- 2. a kind of experimental rig that can monitor detonation wave effect lower piston material temperature change according to claim 1, its It is characterized in that, the temperature sensor selects platinum resistance temperature sensor.
- 3. a kind of experimental rig that can monitor detonation wave effect lower piston material temperature change according to claim 2, its It is characterized in that, for the platinum resistance temperature sensor by the way of being mounted directly, platinum resistance protective case passes through end cap, and in metal The partition plate back side is punched, and has been coated heat-conducting silicone grease in hole, the temperature-sensitive section of temperature sensor is inserted into hole, the sense of temperature sensor Temperature section length is 5~6mm, and the temperature acquisition cycle is 1s.
- 4. a kind of experimental rig that can monitor detonation wave effect lower piston material temperature change according to claim 1, its It is characterized in that, the material selection aluminium alloy of metal partion (metp).
- 5. a kind of experimental rig that can monitor detonation wave effect lower piston material temperature change according to claim 1, its It is characterized in that, the combustion chamber cylinder diameter of the constant volume detonation firebomb body is 75~85mm, and cone angle is 120 °~180 °, combustion chamber Clearance is adjusted with cylinder sleeve, variable from 0~32mm.
- 6. a kind of experimental rig that can monitor detonation wave effect lower piston material temperature change according to claim 5, its It is characterized in that, the material of the constant volume detonation firebomb body is stainless steel 1Cr18Ni9Ti.
- 7. a kind of experimental rig that can monitor detonation wave effect lower piston material temperature change according to claim 1, its It is characterized in that, in the gas handling system, gas component and equivalent proportion are controlled by partial pressure.
- 8. a kind of experimental rig that can monitor detonation wave effect lower piston material temperature change according to claim 7, its It is characterized in that thering is air admission hole, 1~3mm of air admission hole aperture on constant volume detonation firebomb body, intake valve is cut using internal thread needle-like Only valve J13W-350P DN6, outside determine the partial pressure of gaseous mixture each component using pressure transmitter.
- 9. a kind of experimental rig that can monitor detonation wave effect lower piston material temperature change according to claim 1, its It is characterized in that, the control cabinet manual firing system output voltage is 2500V, and ignition energy is more than 10J.
- 10. it can monitor detonation wave effect lower piston material temperature in the one kind realized on experimental rig described in claim 1 to become The method of change, it is characterised in that process is as follows：Step 1：Install constant volume detonation firebomb body, including cylinder cap, metal partion (metp) and cylinder sleeve, bolt torque spanner are tight Gu；Step 2：By marginal position sensor (7), piston diameter a quarter position sensor (8), center sensor (9), spark plug (10) and air intake valve (13) are installed on constant volume detonation firebomb body；Connect temperature measurement system, high energy Ignition system and gas handling system；Step 3：Pretest inspection constant volume detonation firebomb air-tightness；Air intake valve (13) is opened, oxygen hose is passed through into fast grafting Head (18) access air intake valve, using the pressure reducer adjusting intratracheal pressure on oxygen cylinder to 5bar, closes air intake valve (13), The pressure reducer on gas cylinder is closed, disconnects oxygen path；By the tracheae access quick plug (18) of other end closing, it is single to observe intelligence Whether circuit measurement and control instrument registration increases, if measurement and control instrument registration is zero not increase, illustrates that air intake valve (13) leakproofness is intact；Beat Drive air valve (13) into, whether observation measurement and control instrument registration keeps definite value constant, if registration is constant, mounted body is airtight Property is good；Step 4：Setting temperature measurer is acquisition state；Step 5：Gas washing, makes the indoor air discharge of burning, full of oxygen；By oxygen hose by quick connector (18) access into Gas gas circuit, closes pressure relief ball valve (17) and air intake valve (13)；Intratracheal pressure is adjusted using the pressure reducer on oxygen cylinder to arrive 3bar, open air intake valve (13), enter gas, when intelligent single loop measurement and control instrument show pressure registration it is constant when, close into Air valve (13), closes the pressure reducer on gas cylinder；Pressure relief ball valve (17) is opened, disconnects oxygen path, opens air intake valve (13), Gas is discharged；So in triplicate, gas washing is completed；Step 6：The pressure of the pure oxygen and acetylene needed for experiment is calculated using partial pressure method；Close pressure relief ball valve (17) and intake valve Door (13), accesses air intake valve, using the pressure reducer on acetylene gas bottle by admission pressure by acetylene hose by quick connector (18) It is adjusted to the numerical value needed；Air intake valve (13) is opened, acetylene is filled with combustion chamber, closes air intake valve (13), closes acetylene Pressure reducer, opens pressure relief ball valve (17), disconnects acetylene gas circuit；Step 7：Oxygen hose is accessed into gas circuit by quick connector (18), pressure relief ball valve (17) is closed, using on oxygen gas cylinder The numerical value that admission pressure is adjusted to need by pressure reducer；Air intake valve (13) is opened, when the registration on measurement and control instrument is constant, is closed Intake valve (13), closes pressure reducer, opens pressure relief ball valve (17), disconnects oxygen gas circuit；Step 8：The switch on triggering high-energy ignition system control cabinet, high-energy sparking plug discharge manually, and gaseous mixture is straight in combustion chamber Connect detonation；Step 9：Continuous five repeat steps five arrive step 8, and continuous monitoring temperature change, preserves experimental data；Step 10：Experimental data is analyzed, obtains the temperature curve of three positions on metal partion (metp), so as to analyze the machine of piston destruction Reason.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255531A (en) * | 2017-08-09 | 2017-10-17 | 天津大学 | It is a kind of to monitor the experimental rig and method of detonation wave effect lower piston material temperature change |
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| CN111521404A (en) * | 2020-06-08 | 2020-08-11 | 南京理工大学 | Device and method for researching formation and inhibition of in-cylinder detonation under detonation of internal combustion engine |
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