CN104897305B - Electric spark ignition energy calibration system under high pressure and method thereof - Google Patents
Electric spark ignition energy calibration system under high pressure and method thereof Download PDFInfo
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- CN104897305B CN104897305B CN201510237598.0A CN201510237598A CN104897305B CN 104897305 B CN104897305 B CN 104897305B CN 201510237598 A CN201510237598 A CN 201510237598A CN 104897305 B CN104897305 B CN 104897305B
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Abstract
The invention provides an electric spark ignition energy calibration system under high pressure and a method thereof and comprises a high pressure electric spark ignition energy calibration device and an electric spark energy measurement method. The principle is that an ignition electrode, a heating resistance wire and a sensitive thermocouple are arranged in a high pressure heat insulation cavity. Compressed air under certain pressure is inputted into the heat insulation cavity, electric sparks are uniformly and continuously generated for many times in a specific time, and the sensitive thermocouple is used to record a temperature rise curve. The air in the heat insulation cavity is released, when the cavity is restored to a normal temperature state, compressed air with the equivalent pressure is inputted again, the power of the heating resistance wire is set to be constant, and a temperature rise curve is recorded. The above step is repeated, the power of the heating resistance wire is adjusted, and the thermocouple obtains the same temperature rise curve in the same time. Through comparing the electrical spark times and heating resistance wire heating amount in the condition of same cavity, same time and same temperature rise, the energy generated in one time of electric spark is calculated. According to the device and the method, the ignition energy generated by one time of electric spark of different air pressures, different ignition voltages and different ignition electrodes can be accurately obtained, and the measurement data can be widely applied to the scientific research and production practices of the field of aerospace, energy and transport.
Description
Technical field
The present invention relates to spark ignition energy calibration system and method under a kind of hyperbar, specifically one kind is constant
Electric spark is repeatedly produced under frequency to obtain measurable notable temperature rise, and constant work(is utilized in same time using same apparatus
Rate adding thermal resistance obtains identical temperature rise, and comparing calculation is obtaining device and the side of electric spark single ignition energy this important parameter
Method, so as to realize under different air pressure environment various types of electrodes under different voltages the accurate measurement of spark ignition energy with demarcate.
Background technology
Spark ignition energy is to weigh all kinds of burners, the important parameter of engine ignition performance, its measurement data pair
Aero-Space, the energy, traffic are significant, are paid close attention to by engineering circles and scientific circles are long-term and close.Electric spark single is lighted a fire
But voltage absolute energy very high is smaller, and circuit thermal losses is larger, and it produces energy to puncture the density of air with electric spark,
The factors such as electrode distance also have important relationship.In the device of the flammable premix gas minimum ignition energy of all kinds of measurements at present, generally adopt
The ignition energy of electric spark is estimated with spark ignition voltage, there is no method to obtain the definite energy of the actual generation of electric spark, this
Quantitative study to flammable premix gas firing characteristic brings extreme difficulties.
At present both at home and abroad still without the relevant apparatus that can accurately measure and demarcate spark ignition energy.Solve above-mentioned asking
Topic has become extensive and urgent demand.
The content of the invention
For above-mentioned problems of the prior art, the invention provides spark ignition energy mark under a kind of hyperbar
Determine system and method：Specifically, the system utilizes the accumulation characteristics of the multiple heat release of electric spark, in same cavity same time
Same temperature rise is obtained using resistive heater, because electric spark is identical with resistive heater local environment, Exotherm Time is identical,
That is cavity heat waste is equal so that the exothermic effect of the two is equal in the case of identical temperature rise.By contrasting spark discharge number of times
With resistive heater thermal discharge, you can realize that single electric spark produces the accurate measurement and demarcation of energy.Device of the invention and
Method can accurately obtain the ignition energy that gas with various pressure, different ignition voltages, different ignitor single electric sparks are produced
Amount, the device and method can meet basic research and the commercial Application in the fields such as Aero-Space, the energy, traffic.
An object of the present invention is to provide spark ignition energy calibration system under a kind of hyperbar, and the system includes
Hyperbar heat insultating cavity, high-voltage pulses device, resistive heater and its controller, sensitive thermocouple and its display instrument；
High-voltage pulses device includes electrospark electrode, and the electrospark electrode is right in hyperbar heat insultating cavity with resistive heater
Claim or be alternately arranged, sensitive thermocouple is arranged in hyperbar heat insultating cavity center, and is connected with its display instrument by wire, plus
Hot water radiation wire is connected by wire with its controller and forms closed-loop path.
Preferably, the calibration system further limits described hyperbar heat insultating cavity and uses insulated design, internal layer
Arrangement heat-barrier material, outer layer arrangement metal pressure-bearing material.
Preferably, the calibration system further limits the heat-barrier material as asbestos or ceramics.
Preferably, the calibration system further limits described high-voltage pulses device and occurs including high voltage pulse
Device, high-voltage pulse generator is connected with electrospark electrode by wire, high-voltage pulse generator voltage range be 0~
200kV, current waveform is sine wave or square wave；A diameter of 0.05~the 5mm of electrospark electrode.
Another object of the present invention is to provide a kind of electrospark electrode and resistive heater in hyperbar heat insultating cavity
Spark ignition energy calibration method under hyperbar when being arranged symmetrically, the method includes the steps of：
Step 1：Gas is filled：Compressed air is filled in heat insultating cavity, pressure is reached particular value P needed for test0；
Step 2：Produce electric spark：Adjust high-voltage pulses device to particular voltage level U0, ignition switch is opened, make it
Electrospark electrode produces electric spark n times with CF continuous uniform, and records time t0；
Step 3：Record temperature rise curve：Recorded in cavity in time t using sensitive thermocouple0Interior temperature rise Δ T0；
Step 4：Wait until that cavity recovers to normal temperature state, the pressure P such as be filled with again0Compressed air；
Step 6：Temperature rise curve is recorded again：Using sensitive thermocouple record cavity in same time t0Temperature rise Δ
T；
Step 7：Compare Δ T and Δ T0And adjust resistance wire power, repeat step 4 to 6 so that temperature rise value Δ T=Δs T0,
Obtain resistance wire power W now0；
Step 8：Calculate spark ignition energy：According to identifying recording layer, it is calculated in P0Under air pressure, voltage be U0
Electric spark single ignition energy be W0t0/N。
Another object of the present invention is to provide a kind of electrospark electrode and resistive heater in hyperbar heat insultating cavity
Spark ignition energy calibration method under hyperbar when being alternately arranged, the method includes the steps of：
Step 1：Gas is filled：Compressed air is filled in heat insultating cavity, pressure is reached particular value P needed for test0；
Step 2：Produce electric spark：Adjust high-voltage pulses device to particular voltage level U0, ignition switch is opened, make it
Electrospark electrode produces electric spark n times with CF continuous uniform, and records time t0；
Step 3：Record temperature rise curve：Recorded in cavity in time t using sensitive thermocouple0Interior temperature rise Δ T0；
Step 4：Wait until that cavity recovers to normal temperature state, remove electrospark electrode, resistance wire is put into same position, then
The secondary pressure P such as be filled with0Compressed air；
Step 5：Resistant heating：Setting controller makes Resistant heating power invariability for W, turns on the power and begins to warm up；
Step 6：Temperature rise curve is recorded again：Using sensitive thermocouple record cavity in same time t0Temperature rise Δ
T；
Step 7：Compare Δ T and Δ T0And adjust resistance wire power, repeat step 4 to 6 so that temperature rise value Δ T=Δs T0,
Obtain resistance wire power W now0；
Step 8：Calculate spark ignition energy：According to identifying recording layer, it is calculated in P0Under air pressure, voltage be U0
Electric spark single ignition energy be W0t0/N。
Compared with prior art, the invention has the advantages that：1. realize electric spark produce energy direct metering and
Accurate Calibration；2. cavity uses thermal insulation layer, metal level double-decker, heat is greatly reduced while hyperbaric environment is provided and is damaged
Lose；3. the cumlative energy of multiple electric spark is approached using invariable power resistive heater heat production in same apparatus same time, most
Limits exclude heat waste interference, improve the degree of accuracy；4. applicable various types of electrodes is under different ignition voltages, gas with various environmental pressure
The Metrology And Calibration of electric spark energy.Basic research and the commercial Application in the fields such as Aero-Space, the energy, traffic can be met.
Brief description of the drawings
Fig. 1 is the principle schematic diagram. of present system, electrospark electrode-adding thermal resistance in wherein Fig. 1 with Fig. 2A, 2B
Silk is asymmetrical arrangement；Electrospark electrode-resistive heater is to be alternately arranged mode in Fig. 2A, 2B.
In figure：1- thermocouple display instruments, 2- resistive heater controllers, 3- resistive heaters, the sensitive thermocouples of 4-, 5-
High-voltage pulse generator, 6- electrospark electrodes, 7- hyperbar heat insultating cavities
Fig. 3 is method flow diagram when electrospark electrode-resistive heater of the present invention is arranged symmetrically.
Fig. 4 is method flow diagram when electrospark electrode-resistive heater of the present invention is alternately arranged.
Specific embodiment
Principle of the invention, structure, and its course of work are further described below in conjunction with the accompanying drawings.
Spark ignition energy calibration system and method under hyperbar of the present invention, it is adiabatic that the system contains hyperbar
Cavity 7, high-voltage pulses device, resistive heater 3 and its controller 2, sensitive thermocouple 4 and its display instrument 1；High-tension pulse
Rushing igniter includes electrospark electrode 6, and the electrospark electrode is arranged symmetrically with resistive heater in heat insultating cavity, sensitive
Thermocouple is arranged in heat insultating cavity center, and is connected with its display instrument by wire, and resistive heater passes through with its controller
Wire is connected and forms closed-loop path.Described high-voltage pulses device includes high-voltage pulse generator 5, high voltage pulse
Generator is connected with electrospark electrode by wire.Certain type electrode (diameter 1mm, electrode spacing 5mm) is measured in 10 air
Pressure, the process of 60kV voltage down-firing energy：
Specific embodiment one：When electrospark electrode is arranged symmetrically with resistive heater in hyperbar heat insultating cavity,
Compressed air is filled in heat insultating cavity, pressure is reached 10 atmospheric pressure.Regulation high-voltage pulses device electricity
It is 60kV to press, and it is 10Hz (i.e. per second 10 times) to set electric spark and produce frequency.Record sensitive thermocouple display meter reading T1=25
DEG C, high-voltage pulses device is opened, start to produce constant frequency electric spark, and start simultaneously at timing.Timing is closed after 100 seconds
High-voltage pulses device, and record thermocouple display meter reading T2=45 DEG C.
Wait until that cavity recovers to normal temperature state (25 DEG C of thermocouple readings), fill 10 air in heat insultating cavity again
The compressed air of pressure.Setting controller makes Resistant heating power invariability for W, turns on the power and heats and start simultaneously at timing, counts
When 100 seconds after record thermocouple readings T3.Regulation W, repeats the step, until T3=T2=45 DEG C, record W now is 50MW.
Calculate spark ignition energy：According to identifying recording layer, being calculated under 10 atmospheric pressure, this model electrode
Electric spark single ignition energy when ignition voltage is 60kV is 5MJ.
Specific embodiment two：When electrospark electrode is alternately arranged with resistive heater in hyperbar heat insultating cavity
Compressed air is filled in heat insultating cavity, pressure is reached 10 atmospheric pressure.Regulation high-voltage pulses device electricity
It is 60kV to press, and it is 10Hz (i.e. per second 10 times) to set electric spark and produce frequency.Record sensitive thermocouple display meter reading T1=25
DEG C, high-voltage pulses device is opened, start to produce constant frequency electric spark, and start simultaneously at timing.Timing is closed after 100 seconds
High-voltage pulses device, and record thermocouple display meter reading T2=45 DEG C.
Wait until that cavity recovers to normal temperature state (25 DEG C of thermocouple readings), remove electrospark electrode, put in identical bits
Enter resistance wire, fill 10 compressed airs of atmospheric pressure in heat insultating cavity again.Setting controller makes Resistant heating power
Constant is W, turns on the power and heats and start simultaneously at timing, and timing records thermocouple readings T after 100 seconds3.Regulation W, repeats the step
Suddenly, until T3=T2=45 DEG C, record W now is 50MW.
Calculate spark ignition energy：According to identifying recording layer, being calculated under 10 atmospheric pressure, this model electrode
Electric spark single ignition energy when ignition voltage is 60kV is 5MJ.
Claims (10)
1. spark ignition energy calibration system under a kind of hyperbar, it is characterised in that：The system include hyperbar heat insultating cavity,
High-voltage pulses device, resistive heater and its controller, sensitive thermocouple and its display instrument；High-voltage pulses device
Including electrospark electrode, the electrospark electrode is arranged symmetrically with resistive heater in hyperbar heat insultating cavity, sensitive thermoelectricity
Hyperbar heat insultating cavity center occasionally is arranged in, and is connected with its display instrument by wire, resistive heater leads to its controller
Wire is crossed to be connected and form closed-loop path.
2. spark ignition energy calibration system under a kind of hyperbar according to claim 1, it is characterised in that：Described
Hyperbar heat insultating cavity uses insulated design, internal layer arrangement heat-barrier material, outer layer arrangement metal pressure-bearing material.
3. spark ignition energy calibration system under a kind of hyperbar according to claim 2, it is characterised in that：It is described every
Hot material is asbestos or ceramics.
4. spark ignition energy calibration system under a kind of hyperbar according to claim 1, it is characterised in that：Described
High-voltage pulses device includes high-voltage pulse generator, and high-voltage pulse generator is connected with electrospark electrode by wire
Connect, high-voltage pulse generator voltage range is 0~200kV, current waveform is sine wave or square wave；Electrospark electrode is a diameter of
0.05~5mm.
5. a kind of spark ignition energy calibration method under hyperbar, it uses the height as any one of Claims 1-4
Spark ignition energy calibration system under air pressure, it is characterised in that the method includes the steps of,
1) gas filling：Compressed air is filled in heat insultating cavity, pressure is reached particular value P needed for test0；
2) electric spark is produced：Adjust high-voltage pulses device to particular voltage level U0, ignition switch is opened, make its electric spark electricity
Pole produces electric spark n times with CF continuous uniform, and records time t0；
3) temperature rise curve is recorded：Recorded in cavity in time t using sensitive thermocouple0Interior temperature rise Δ T0；
4) wait until that cavity recovers to normal temperature state, the pressure P such as be filled with again0Compressed air；
5) Resistant heating：Setting controller makes Resistant heating power invariability for W, turns on the power and begins to warm up；
6) temperature rise curve is recorded again：Using sensitive thermocouple record cavity in same time t0Temperature rise Δ T；
7) Δ T and Δ T is compared0And adjust resistance wire power, repeat step 4 to 6 so that temperature rise value Δ T=Δs T0, obtain now
Resistance wire power W0；
8) spark ignition energy is calculated：According to identifying recording layer, it is calculated in P0Under air pressure, voltage be U0Electric spark
Single ignition energy is W0t0/N。
6. spark ignition energy calibration system under a kind of hyperbar, it is characterised in that：The system include hyperbar heat insultating cavity,
High-voltage pulses device, resistive heater and its controller, sensitive thermocouple and its display instrument；High-voltage pulses device
Including electrospark electrode, the electrospark electrode is alternately arranged with resistive heater in hyperbar heat insultating cavity, sensitive thermoelectricity
Hyperbar heat insultating cavity center occasionally is arranged in, and is connected with its display instrument by wire, resistive heater leads to its controller
Wire is crossed to be connected and form closed-loop path.
7. spark ignition energy calibration system under a kind of hyperbar according to claim 6, it is characterised in that：Described
Hyperbar heat insultating cavity uses insulated design, internal layer arrangement heat-barrier material, outer layer arrangement metal pressure-bearing material.
8. spark ignition energy calibration system under a kind of hyperbar according to claim 7, it is characterised in that：It is described every
Hot material is asbestos or ceramics.
9. spark ignition energy calibration system under a kind of hyperbar according to claim 6, it is characterised in that：Described
High-voltage pulses device includes high-voltage pulse generator, and high-voltage pulse generator is connected with electrospark electrode by wire
Connect, high-voltage pulse generator voltage range is 0~200kV, current waveform is sine wave or square wave；Electrospark electrode is a diameter of
0.05~5mm.
10. a kind of spark ignition energy calibration method under hyperbar, it is used as any one of claim 6 to 9
Spark ignition energy calibration system under hyperbar, it is characterised in that the method includes the steps of,
1) gas filling：Compressed air is filled in heat insultating cavity, pressure is reached particular value P needed for test0；
2) electric spark is produced：Adjust high-voltage pulses device to particular voltage level U0, ignition switch is opened, make its electric spark electricity
Pole produces electric spark n times with CF continuous uniform, and records time t0；
3) temperature rise curve is recorded：Recorded in cavity in time t using sensitive thermocouple0Interior temperature rise Δ T0；
4) wait until that cavity recovers to normal temperature state, remove electrospark electrode, resistance wire is put into same position, be filled with again
Pressure P0Compressed air；
5) Resistant heating：Setting controller makes Resistant heating power invariability for W, turns on the power and begins to warm up；
6) temperature rise curve is recorded again：Using sensitive thermocouple record cavity in same time t0Temperature rise Δ T；
7) Δ T and Δ T is compared0And adjust resistance wire power, repeat step 4 to 6 so that temperature rise value Δ T=Δs T0, obtain now
Resistance wire power W0；
8) spark ignition energy is calculated：According to identifying recording layer, it is calculated in P0Under air pressure, voltage be U0Electric spark
Single ignition energy is W0t0/N。
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201367972Y (en) * | 2009-03-13 | 2009-12-23 | 北京工业大学 | Engine ignition energy testing system for vehicle |
| CN201449389U (en) * | 2009-05-14 | 2010-05-05 | 西安热工研究院有限公司 | Air mixture explosion testing device |
| CN102252344A (en) * | 2011-04-29 | 2011-11-23 | 安徽工业大学 | Novel ignition temperature measuring device for experiment |
| CN103954737A (en) * | 2014-04-11 | 2014-07-30 | 中国石油化工股份有限公司 | Minimum ignition energy testing device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2516246B2 (en) * | 1988-09-27 | 1996-07-24 | 日本特殊陶業株式会社 | Spark plug temperature measurement device |
| JPH0945459A (en) * | 1995-08-01 | 1997-02-14 | Ngk Spark Plug Co Ltd | Temperature-measuring spark plug for internal combustion engine |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201367972Y (en) * | 2009-03-13 | 2009-12-23 | 北京工业大学 | Engine ignition energy testing system for vehicle |
| CN201449389U (en) * | 2009-05-14 | 2010-05-05 | 西安热工研究院有限公司 | Air mixture explosion testing device |
| CN102252344A (en) * | 2011-04-29 | 2011-11-23 | 安徽工业大学 | Novel ignition temperature measuring device for experiment |
| CN103954737A (en) * | 2014-04-11 | 2014-07-30 | 中国石油化工股份有限公司 | Minimum ignition energy testing device |
Non-Patent Citations (1)
| Title |
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| 粉尘电火花点火研究;任纯力等;《工业安全与环保》;20100831;第36卷(第8期);第30-32页 * |
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