CN104897305A - 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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- CN104897305A CN104897305A CN201510237598.0A CN201510237598A CN104897305A CN 104897305 A CN104897305 A CN 104897305A CN 201510237598 A CN201510237598 A CN 201510237598A CN 104897305 A CN104897305 A CN 104897305A
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- hyperbar
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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, that a kind of electric spark that repeatedly produces under constant frequency can measure remarkable temperature rise to obtain specifically, and use same apparatus in same time, utilize firm power heating resistor to obtain identical temperature rise, comparing calculation is to obtain the apparatus and method of this important parameter of electric spark single ignition energy, thus the accurate measurement and calibration of various types of electrodes spark ignition energy under different voltage under realizing different air pressure environment.
Background technology
Spark ignition energy is the important parameter weighing all kinds of burner, engine ignition performance, and its measurement data is significant to Aero-Space, the energy, traffic, receives the long-term and close concern of engineering circles and scientific circles.But the very high absolute energy of electric spark single ignition voltage is less, circuit thermal losses is comparatively large, and its produce power and electric spark puncture the density of air, and the factors such as electrode distance also have important relationship.In the device of current all kinds of measurement flammable premix gas minimum ignition energy, spark ignition voltage is generally adopted to estimate the ignition energy of electric spark, the method of there is no obtains the definite energy of the actual generation of electric spark, and this brings extreme difficulties to the quantitative examination of flammable premix gas firing characteristic.
Still not having both at home and abroad at present can Measurement accuracy and the relevant apparatus demarcating spark ignition energy.Solve the problem and become extensive and urgent demand.
Summary of the invention
For above-mentioned problems of the prior art, the invention provides spark ignition energy calibration system and method under a kind of hyperbar: specifically, this system utilizes the accumulation characteristics of electric spark repeatedly heat release, in same cavity same time, use resistive heater to obtain same temperature rise, residing for electric spark and resistive heater, environment facies are same, Exotherm Time is identical, and namely cavity heat waste is equal, makes the exothermic effect of the two in identical temperature rise situation equal.By contrast spark discharge number of times and resistive heater thermal discharge, the energy-producing accurate measurement of single electric spark and demarcation can be realized.Apparatus and method of the present invention accurately can obtain the ignition energy of gas with various pressure, difference ignition voltage, the generation of different spark electrode single electric spark, and this device and method can meet fundamental 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 this system comprises hyperbar heat insultating cavity, high-voltage pulses device, resistive heater and controller thereof, sensitive thermopair and Displaying Meter thereof; High-voltage pulses device comprises electrospark electrode, described electrospark electrode and resistive heater are symmetrical or alternately arrange in hyperbar heat insultating cavity, sensitive thermopair is arranged in hyperbar heat insultating cavity center, and be connected with its Displaying Meter by wire, resistive heater and its controller are connected by wire and form closed-loop path.
Preferably, this calibration system limits described hyperbar heat insultating cavity further and adopts insulated design, and internal layer arranges heat-barrier material, outer layout metal pressure-bearing material.
Preferably, this calibration system limits described heat-barrier material is further asbestos or pottery.
Preferably, this calibration system limits described high-voltage pulses device further and comprises high-voltage pulse generator, high-voltage pulse generator is connected by wire with electrospark electrode, and high-voltage pulse generator voltage range is 0 ~ 200kV, and current waveform is sinusoidal wave or square wave; Electrospark electrode diameter is 0.05 ~ 5mm.
Another object of the present invention is to spark ignition energy calibration method under hyperbar when providing a kind of electrospark electrode and resistive heater to be arranged symmetrically with in hyperbar heat insultating cavity, the method includes the steps of:
Step 1: gas is annotated: pressurized air of annotating in heat insultating cavity, makes pressure reach the required particular value P of test
0;
Step 2: produce electric spark: adjustment high-voltage pulses device is at particular voltage level U
0, open ignition switch, make its electrospark electrode produce electric spark N time with characteristic frequency continuous uniform, and writing time t
0;
Step 3: record temperature rise curve: use inherent this time t of sensitive thermopair record cavity
0interior temperature rise Δ T
0;
Step 4: wait until that cavity returns to normal temperature state, be again filled with equal pressure P
0pressurized air;
Step 6: again record temperature rise curve: use t in the inherent same time of sensitive thermopair record cavity
0temperature rise Δ T;
Step 7: compare Δ T and Δ T
0and adjusting resistance silk power, repeat step 4 to 6, make temperature rise value Δ T=Δ T
0, obtain resistance wire power W now
0;
Step 8: calculate spark ignition energy: according to identifying recording layer, calculate at P
0under air pressure, voltage is U
0electric spark single ignition energy be W
0t
0/ N.
Another object of the present invention is to spark ignition energy calibration method under hyperbar when providing a kind of electrospark electrode and resistive heater alternately to arrange in hyperbar heat insultating cavity, the method includes the steps of:
Step 1: gas is annotated: pressurized air of annotating in heat insultating cavity, makes pressure reach the required particular value P of test
0;
Step 2: produce electric spark: adjustment high-voltage pulses device is at particular voltage level U
0, open ignition switch, make its electrospark electrode produce electric spark N time with characteristic frequency continuous uniform, and writing time t
0;
Step 3: record temperature rise curve: use inherent this time t of sensitive thermopair record cavity
0interior temperature rise Δ T
0;
Step 4: wait until that cavity returns to normal temperature state, remove electrospark electrode, put into resistance wire in same position, be again filled with equal pressure P
0pressurized air;
Step 5: Resistant heating: setting controller makes Resistant heating power invariability be W, opening power starts heating;
Step 6: again record temperature rise curve: use t in the inherent same time of sensitive thermopair record cavity
0temperature rise Δ T;
Step 7: compare Δ T and Δ T
0and adjusting resistance silk power, repeat step 4 to 6, make temperature rise value Δ T=Δ T
0, obtain resistance wire power W now
0;
Step 8: calculate spark ignition energy: according to identifying recording layer, calculate at P
0under air pressure, voltage is U
0electric spark single ignition energy be W
0t
0/ N.
Compared with prior art, tool of the present invention has the following advantages: 1. achieve the energy-producing direct metering of electric spark and Accurate Calibration; 2. cavity adopts thermofin, metal level double-decker, while providing hyperbaric environment, greatly reduce thermal loss; 3. in same apparatus same time, utilize the heat production of invariable power resistive heater to approach repeatedly the cumlative energy of electric spark, get rid of heat waste interference to greatest extent, improve accuracy; 4. the Metrology And Calibration of various types of electrodes electric spark energy under difference ignition voltage, gas with various environmental pressure is suitable for.Fundamental research and the commercial Application in the fields such as Aero-Space, the energy, traffic can be met.
Accompanying drawing explanation
Fig. 1 and Fig. 2 A, 2B are the structural principle schematic diagram of present system, and wherein in Fig. 1, electrospark electrode-resistive heater is asymmetrical arrangement; In Fig. 2 A, 2B, electrospark electrode-resistive heater is for replacing arrangement.
In figure: 1-thermopair Displaying Meter, 2-resistive heater controller, 3-resistive heater, the sensitive thermopair of 4-, 5-high-voltage pulse generator, 6-electrospark electrode, 7-hyperbar heat insultating cavity
Fig. 3 is electrospark electrode-resistive heater of the present invention method flow diagram when being arranged symmetrically with.
Fig. 4 is that electrospark electrode-resistive heater of the present invention replaces method flow diagram when arranging.
Embodiment
Below in conjunction with accompanying drawing to principle of the present invention, structure, and the course of work is further described.
Spark ignition energy calibration system and method under hyperbar of the present invention, this system contains hyperbar heat insultating cavity 7, high-voltage pulses device, resistive heater 3 and controller 2 thereof, sensitive thermopair 4 and Displaying Meter 1 thereof; High-voltage pulses device comprises electrospark electrode 6, described electrospark electrode and resistive heater are arranged symmetrically with in heat insultating cavity, sensitive thermopair is arranged in heat insultating cavity center, and be connected with its Displaying Meter by wire, resistive heater and its controller are connected by wire and form closed-loop path.Described high-voltage pulses device comprises high-voltage pulse generator 5, and high-voltage pulse generator is connected by wire with electrospark electrode.Measure the process of certain type electrode (diameter 1mm, electrode separation 5mm) at 10 atmospheric pressure, 60kV voltage down-firing energy:
Embodiment one: when electrospark electrode and resistive heater are arranged symmetrically with in hyperbar heat insultating cavity,
To annotate in heat insultating cavity pressurized air, make pressure reach 10 atmospheric pressure.Regulate high-voltage pulses device voltage to be 60kV, it is 10Hz (namely 10 times per second) that setting electric spark produces frequency.Record sensitive thermopair indicator gauge reading T
1=25 DEG C, open high-voltage pulses device, start to produce constant frequency electric spark, and start timing simultaneously.Timing closes high-voltage pulses device in 100 seconds afterwards, and records thermopair indicator gauge reading T
2=45 DEG C.
Wait until that cavity returns to normal temperature state (thermocouple readings 25 DEG C), 10 atmospheric pressurized air of again annotating in heat insultating cavity.Setting controller makes Resistant heating power invariability be W, and opening power heating also starts timing simultaneously, and timing records thermocouple readings T in 100 seconds afterwards
3.Regulate W, repeat this step, until T
3=T
2=45 DEG C, record W is now 50MW.
Calculate spark ignition energy: according to identifying recording layer, calculate under 10 atmospheric pressure, the electric spark single ignition energy of this model electrode when ignition voltage is 60kV is 5MJ.
Embodiment two: when electrospark electrode and resistive heater are alternately arranged in hyperbar heat insultating cavity
To annotate in heat insultating cavity pressurized air, make pressure reach 10 atmospheric pressure.Regulate high-voltage pulses device voltage to be 60kV, it is 10Hz (namely 10 times per second) that setting electric spark produces frequency.Record sensitive thermopair indicator gauge reading T
1=25 DEG C, open high-voltage pulses device, start to produce constant frequency electric spark, and start timing simultaneously.Timing closes high-voltage pulses device in 100 seconds afterwards, and records thermopair indicator gauge reading T
2=45 DEG C.
Wait until that cavity returns to normal temperature state (thermocouple readings 25 DEG C), remove electrospark electrode, put into resistance wire in same position, 10 atmospheric pressurized air of again annotating in heat insultating cavity.Setting controller makes Resistant heating power invariability be W, and opening power heating also starts timing simultaneously, and timing records thermocouple readings T in 100 seconds afterwards
3.Regulate W, repeat this step, until T
3=T
2=45 DEG C, record W is now 50MW.
Calculate spark ignition energy: according to identifying recording layer, calculate under 10 atmospheric pressure, the electric spark single ignition energy of this model electrode when ignition voltage is 60kV is 5MJ.
Claims (10)
1. a spark ignition energy calibration system under hyperbar, is characterized in that: this system comprises hyperbar heat insultating cavity, high-voltage pulses device, resistive heater and controller thereof, sensitive thermopair and Displaying Meter thereof; High-voltage pulses device comprises electrospark electrode, described electrospark electrode and resistive heater are arranged symmetrically with in hyperbar heat insultating cavity, sensitive thermopair is arranged in hyperbar heat insultating cavity center, and be connected with its Displaying Meter by wire, resistive heater and its controller are connected by wire and form closed-loop path.
2. spark ignition energy calibration system under a kind of hyperbar according to claim 1, is characterized in that: described hyperbar heat insultating cavity adopts insulated design, and internal layer arranges heat-barrier material, outer layout metal pressure-bearing material.
3. spark ignition energy calibration system under a kind of hyperbar according to claim 2, is characterized in that: described heat-barrier material is asbestos or pottery.
4. spark ignition energy calibration system under a kind of hyperbar according to claim 1, it is characterized in that: described high-voltage pulses device comprises high-voltage pulse generator, high-voltage pulse generator is connected by wire with electrospark electrode, high-voltage pulse generator voltage range is 0 ~ 200kV, and current waveform is sinusoidal wave or square wave; Electrospark electrode diameter is 0.05 ~ 5mm.
5. a spark ignition energy calibration method under hyperbar, it adopts spark ignition energy calibration system under the hyperbar according to any one of Claims 1-4, it is characterized in that the method includes the steps of,
1) gas filling: pressurized air of annotating in heat insultating cavity, makes pressure reach the required particular value P of test
0;
2) electric spark is produced: adjustment high-voltage pulses device is at particular voltage level U
0, open ignition switch, make its electrospark electrode produce electric spark N time with characteristic frequency continuous uniform, and writing time t
0;
3) temperature rise curve is recorded: use inherent this time t of sensitive thermopair record cavity
0interior temperature rise Δ T
0;
4) wait until that cavity returns to normal temperature state, be again filled with equal pressure P
0pressurized air;
5) Resistant heating: setting controller makes Resistant heating power invariability be W, opening power starts heating;
6) again temperature rise curve is recorded: use t in the inherent same time of sensitive thermopair record cavity
0temperature rise Δ T;
7) Δ T and Δ T is compared
0and adjusting resistance silk power, repeat step 4 to 6, make temperature rise value Δ T=Δ T
0, obtain resistance wire power W now
0;
8) spark ignition energy is calculated: according to identifying recording layer, calculate at P
0under air pressure, voltage is U
0electric spark single ignition energy be W
0t
0/ N.
6. a spark ignition energy calibration system under hyperbar, is characterized in that: this system comprises hyperbar heat insultating cavity, high-voltage pulses device, resistive heater and controller thereof, sensitive thermopair and Displaying Meter thereof; High-voltage pulses device comprises electrospark electrode, described electrospark electrode and resistive heater are alternately arranged in hyperbar heat insultating cavity, sensitive thermopair is arranged in hyperbar heat insultating cavity center, and be connected with its Displaying Meter by wire, resistive heater and its controller are connected by wire and form closed-loop path.
7. spark ignition energy calibration system under a kind of hyperbar according to claim 6, is characterized in that: described hyperbar heat insultating cavity adopts insulated design, and internal layer arranges heat-barrier material, outer layout metal pressure-bearing material.
8. spark ignition energy calibration system under a kind of hyperbar according to claim 7, is characterized in that: described heat-barrier material is asbestos or pottery.
9. spark ignition energy calibration system under a kind of hyperbar according to claim 6, it is characterized in that: described high-voltage pulses device comprises high-voltage pulse generator, high-voltage pulse generator is connected by wire with electrospark electrode, high-voltage pulse generator voltage range is 0 ~ 200kV, and current waveform is sinusoidal wave or square wave; Electrospark electrode diameter is 0.05 ~ 5mm.
10. a spark ignition energy calibration method under hyperbar, it adopts spark ignition energy calibration system under the hyperbar according to any one of claim 6 to 9, it is characterized in that the method includes the steps of,
1) gas filling: pressurized air of annotating in heat insultating cavity, makes pressure reach the required particular value P of test
0;
2) electric spark is produced: adjustment high-voltage pulses device is at particular voltage level U
0, open ignition switch, make its electrospark electrode produce electric spark N time with characteristic frequency continuous uniform, and writing time t
0;
3) temperature rise curve is recorded: use inherent this time t of sensitive thermopair record cavity
0interior temperature rise Δ T
0;
4) wait until that cavity returns to normal temperature state, remove electrospark electrode, put into resistance wire in same position, be again filled with equal pressure P
0pressurized air;
5) Resistant heating: setting controller makes Resistant heating power invariability be W, opening power starts heating;
6) again temperature rise curve is recorded: use t in the inherent same time of sensitive thermopair record cavity
0temperature rise Δ T;
7) Δ T and Δ T is compared
0and adjusting resistance silk power, repeat step 4 to 6, make temperature rise value Δ T=Δ T
0, obtain resistance wire power W now
0;
8) spark ignition energy is calculated: according to identifying recording layer, calculate at P
0under air pressure, voltage is U
0electric spark single ignition energy be W
0t
0/ N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510237598.0A CN104897305B (en) | 2015-05-12 | 2015-05-12 | Electric spark ignition energy calibration system under high pressure and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510237598.0A CN104897305B (en) | 2015-05-12 | 2015-05-12 | Electric spark ignition energy calibration system under high pressure and method thereof |
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| CN104897305B CN104897305B (en) | 2017-05-24 |
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|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109759900A (en) * | 2019-03-21 | 2019-05-17 | 中国工程物理研究院化工材料研究所 | Thermometric cutter suitable for energetic material machining |
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-
2015
- 2015-05-12 CN CN201510237598.0A patent/CN104897305B/en not_active Expired - Fee Related
Patent Citations (6)
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|---|---|---|---|---|
| JPH0291476A (en) * | 1988-09-27 | 1990-03-30 | Ngk Spark Plug Co Ltd | Temperature measuring device for spark plug |
| JPH0945459A (en) * | 1995-08-01 | 1997-02-14 | Ngk Spark Plug Co Ltd | Temperature-measuring spark plug for internal combustion engine |
| 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 |
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Non-Patent Citations (1)
| Title |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109759900A (en) * | 2019-03-21 | 2019-05-17 | 中国工程物理研究院化工材料研究所 | Thermometric cutter suitable for energetic material machining |
| CN109759900B (en) * | 2019-03-21 | 2024-03-12 | 中国工程物理研究院化工材料研究所 | Temperature measuring cutter suitable for cutting energy-containing material |
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