CN103343982A - Method for enabling laser to induce metal target plasma to achieve ignition of flammable gas and device for achieving same - Google Patents
Method for enabling laser to induce metal target plasma to achieve ignition of flammable gas and device for achieving same Download PDFInfo
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- CN103343982A CN103343982A CN2013103086387A CN201310308638A CN103343982A CN 103343982 A CN103343982 A CN 103343982A CN 2013103086387 A CN2013103086387 A CN 2013103086387A CN 201310308638 A CN201310308638 A CN 201310308638A CN 103343982 A CN103343982 A CN 103343982A
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Abstract
The invention provides a method for enabling laser to induce metal target plasma to achieve ignition of flammable gas and a device for achieving the method, and relates to the method for achieving ignition of the flammable gas and the device for achieving the method. The method and the device for achieving the method solve the problem that an existing method for enabling laser to directly breakdown the gas to induce the plasma to conduct ignition is high in minimum ignition energy, low in ignition success rate and high in requirement for laser output energy. The method includes the steps of enabling premixed gas to enter a quartz tube, emitting a laser bundle through a Nd:YAG laser, focusing the bundle on the surface of a metal target, inducing the metal target to produce the plasma and igniting the premixed gas in the quartz tube. According to the device, the gas outlet of a premixing tank is communicated with the tail end of the quartz tube, the metal target is arranged on the side face, above the tube opening of the quartz tube, of the quartz tube, laser produced by the Nd:YAG laser is reflected to a spectroscope through a mirror and divided into reflected light and transmission light through the spectroscope, the first reflected light is emitted outward, and the transmission light penetrates through a lens and is focused on the metal target through the lens. The method and the device are suitable for situations where flammable gas ignition is needed.
Description
Technical field
The present invention relates to a kind of device of realizing the method for fuel gas igniting and realizing this method.
Background technology
Traditional plug ignition needs to increase the discharge voltage of spark plug in order to improve the success rate of poor burning-point fire, has shortened the life-span of spark plug greatly, and spark plug is in combustion system inside, changes to be difficult for.Though and the direct gas breakdown induced plasma of laser ignition method can overcome the above problems to a certain extent, required minimum ignition energy height is difficult to realize the miniaturization of laser instrument, is unfavorable for being applied to automobile or other small-sized combustion system inside.
Summary of the invention
The present invention be for solve minimum ignition energy height, ignition success rate that the direct gas breakdown induced plasma of existing laser ignition method needs low, to the high problem of laser instrument output energy requirement, thereby provide a kind of induced with laser metallic target plasma to realize the method for fuel gas igniting and realize the device of this method.
A kind of induced with laser metallic target plasma is realized the method for fuel gas igniting, and it is realized by following steps:
Step 1, the flammable premixed gas body in the premixing tank is fed quartz ampoule;
Metallic target is placed in step 2, the side above the quartz ampoule mouth of pipe; Adopt Nd:YAG laser instrument emission laser beam, and utilize focusing arrangement that this laser beam is focused on the metallic target surface, induce metallic target to produce plasma, and the flammable premixed gas body at quartzy mouth of pipe place is lighted.
Realize the device of a kind of induced with laser metallic target plasma realization fuel gas igniting of said method, it is characterized in that: it comprises N
2Gas cylinder 4, O
2Gas cylinder 5, CH
4Gas cylinder 6, premixing tank 7, metallic target 8, quartz ampoule 9, Nd:YAG laser instrument 10, speculum 11, spectroscope 12 and lens 13;
Described N
2The N of the gas outlet of gas cylinder 4 and premixing tank 7
2Air inlet is communicated with; Described O
2The O of the gas outlet of gas cylinder 4 and premixing tank 7
2Air inlet is communicated with; Described CH
4The CH of the gas outlet of gas cylinder 4 and premixing tank 7
4Air inlet is communicated with; The gas outlet of premixing tank 7 is communicated with the end of quartz ampoule 9; Metallic target 8 is arranged on the side of the mouth of pipe top of quartz ampoule 9;
The laser that Nd:YAG laser instrument 10 produces reflexes to spectroscope 12 through speculum 11, is divided into reverberation and transmitted light through spectroscope 12; A described reverberation outgoing is to outside; Transmitted light is incident to lens 13; Focus on the metallic target 8 through lens 13.
It comprises that also 2, numbers reverberation of binary channels energy meter are incident to the probe of binary channels energy meter 2.
It also comprises computer 1 and delay time generator 14, and the time delayed signal output of described delay time generator 14 is connected with the time delayed signal input of the time delayed signal input of Nd:YAG laser instrument 10, binary channels energy meter 2; The energy value signal output part of described binary channels energy meter 2 is connected with the energy value signal input part of computer 1.
It also comprises flow controller 3 and three electrically-controlled valve, and described three electrically-controlled valve are separately positioned on N
2The place, gas outlet of gas cylinder 4, O
2Place, gas outlet and the CH of gas cylinder 5
4The place, gas outlet of gas cylinder 6; Three control signal outputs of described flow controller 3 are connected with the control signal input of three electrically-controlled valve.
Nd:YAG laser instrument output Wavelength of Laser is 1064nm or 532nm; The pulse energy of output is between 0.2mJ～20mJ; Repetition rate is 1Hz～100Hz; Pulse width is 5ns～20ns.
The material of metallic target 8 is tungsten, tantalum or stainless steel.
The splitting ratio of spectroscope 12 is 5%～20%.
The bore of quartz ampoule 9 is 5mm～15mm.
The focal length of lens 13 is 50mm～250mm.
The present invention proposes the device that a kind of induced with laser metallic target plasma is realized the method for fuel gas igniting and realized this method, can reduce minimum ignition energy significantly, and increasing substantially ignition success rate, the miniaturization of the laser instrument of being convenient to light a fire and engineering are used.
Description of drawings
Fig. 1 is the structural representation that installs among the present invention.
The specific embodiment
The specific embodiment one, in conjunction with Fig. 1 this specific embodiment is described, a kind of induced with laser metallic target plasma is realized the method for fuel gas igniting, and it is realized by following steps:
Step 1, the flammable premixed gas body in the premixing tank is fed quartz ampoule;
Metallic target is placed in step 2, the side above the quartz ampoule mouth of pipe; Adopt Nd:YAG laser instrument emission laser beam, and utilize focusing arrangement that this laser beam is focused on the metallic target surface, induce metallic target to produce plasma, and the flammable premixed gas body at quartzy mouth of pipe place is lighted.
In said process, also adopt the energy meter measuring laser beam through spectroscopical reflected energy, thereby obtain minimum ignition energy.
Gas in the step 1 can also be methane and Air mixing gas, perhaps N
2, O
2And CH
4Mist.
The present invention is based on induced with laser metallic target plasma the mixed combustible gas body lighted a fire, can solve present laser directly puncture minimum ignition energy height, ignition success rate that air induced plasma ignition method needs low, to the high problem of laser instrument output energy requirement.
The specific embodiment two, the realization specific embodiment one described a kind of induced with laser metallic target plasma are realized the device of fuel gas igniting, and it comprises N
2Gas cylinder 4, O
2Gas cylinder 5, CH
4Gas cylinder 6, premixing tank 7, metallic target 8, quartz ampoule 9, Nd:YAG laser instrument 10, speculum 11, spectroscope 12 and lens 13;
Described N
2The N of the gas outlet of gas cylinder 4 and premixing tank 7
2Air inlet is communicated with; Described O
2The O of the gas outlet of gas cylinder 4 and premixing tank 7
2Air inlet is communicated with; Described CH
4The CH of the gas outlet of gas cylinder 4 and premixing tank 7
4Air inlet is communicated with; The gas outlet of premixing tank 7 is communicated with the end of quartz ampoule 9; Metallic target 8 is arranged on the side of the mouth of pipe top of quartz ampoule 9;
The laser that Nd:YAG laser instrument 10 produces reflexes to spectroscope 12 through speculum 11, is divided into reverberation and transmitted light through spectroscope 12; A described reverberation outgoing is to outside; Transmitted light is incident to lens 13; Focus on the metallic target 8 through lens 13.
The specific embodiment three, this specific embodiment and the specific embodiment two described a kind of induced with laser metallic target plasmas realize that the difference of the device of fuel gas igniting is, it comprises that also 2, numbers reverberation of binary channels energy meter are incident to the probe of binary channels energy meter 2.
The specific embodiment four, this specific embodiment and the specific embodiment three described a kind of induced with laser metallic target plasmas realize that the difference of the device of fuel gas igniting is, it also comprises computer 1 and delay time generator 14, and the time delayed signal output of described delay time generator 14 is connected with the time delayed signal input of the time delayed signal input of Nd:YAG laser instrument 10, binary channels energy meter 2; The energy value signal output part of described binary channels energy meter 2 is connected with the energy value signal input part of computer 1.
The specific embodiment five, this specific embodiment and the specific embodiment four described a kind of induced with laser metallic target plasmas realize that the difference of the device of fuel gas igniting is, it also comprises flow controller 3 and three electrically-controlled valve, and described three electrically-controlled valve are separately positioned on N
2The place, gas outlet of gas cylinder 4, O
2Place, gas outlet and the CH of gas cylinder 5
4The place, gas outlet of gas cylinder 6; Three control signal outputs of described flow controller 3 are connected with the control signal input of three electrically-controlled valve.
The specific embodiment six, this specific embodiment and the specific embodiment five described a kind of induced with laser metallic target plasmas realize that the difference of the device of fuel gas igniting is, Nd:YAG laser instrument output Wavelength of Laser is 1064nm or 532nm; The pulse energy of output is between 0.2mJ～20mJ; Repetition rate is 1Hz～100Hz; Pulse width is 5ns～20ns.
The specific embodiment seven, this specific embodiment and the specific embodiment six described a kind of induced with laser metallic target plasmas realize that the difference of the device of fuel gas igniting is that the material of metallic target 8 is tungsten, tantalum or stainless steel.
The specific embodiment eight, this specific embodiment and the specific embodiment seven described a kind of induced with laser metallic target plasmas realize that the difference of the device of fuel gas igniting is that the splitting ratio of spectroscope 12 is 5%～20%.
The specific embodiment nine, this specific embodiment and the specific embodiment eight described a kind of induced with laser metallic target plasmas realize that the difference of the device of fuel gas igniting is that the bore of quartz ampoule 9 is 5mm～15mm.
The specific embodiment ten, this specific embodiment and the specific embodiment nine described a kind of induced with laser metallic target plasmas realize that the difference of the device of fuel gas igniting is that the focal length of lens 13 is 50mm～250mm.
In the present embodiment, the Nd:YAG laser instrument is for generation of laser pulse; Flow controller is used for control mist equivalent proportion; Premixing tank is used for experimental gas is evenly mixed; The light splitting light path is used for incident laser is divided into two bundles, calculates total projectile energy by measuring wherein the beam of laser pulse energy; Focused light passages is used for laser pulse is focused on the metallic target surface to produce plasma; The binary channels energy meter is used for measuring the reflected energy behind spectroscope; Delay time generator is used for the control laser instrument and the binary channels energy meter is realized synchronously.
Claims (10)
1. an induced with laser metallic target plasma is realized the method that fuel gas is lighted a fire, and it is characterized in that: it is realized by following steps:
Step 1, the flammable premixed gas body in the premixing tank is fed quartz ampoule;
Metallic target is placed in step 2, the side above the quartz ampoule mouth of pipe; Adopt Nd:YAG laser instrument emission laser beam, and utilize focusing arrangement that this laser beam is focused on the metallic target surface, induce metallic target to produce plasma, and the flammable premixed gas body at quartzy mouth of pipe place is lighted.
2. realize the device of the described a kind of induced with laser metallic target plasma realization fuel gas of claim 1 igniting, it is characterized in that: it comprises N
2Gas cylinder (4), O
2Gas cylinder (5), CH
4Gas cylinder (6), premixing tank (7), metallic target (8), quartz ampoule (9), Nd:YAG laser instrument (10), speculum (11), spectroscope (12) and lens (13);
Described N
2The N of the gas outlet of gas cylinder (4) and premixing tank (7)
2Air inlet is communicated with; Described O
2The O of the gas outlet of gas cylinder (4) and premixing tank (7)
2Air inlet is communicated with; Described CH
4The CH of the gas outlet of gas cylinder (4) and premixing tank (7)
4Air inlet is communicated with; The gas outlet of premixing tank (7) is communicated with the end of quartz ampoule (9); Metallic target (8) is arranged on the side of the mouth of pipe top of quartz ampoule (9);
The laser that Nd:YAG laser instrument (10) produces reflexes to spectroscope (12) through speculum (11), is divided into reverberation and transmitted light through spectroscope (12); A described reverberation outgoing is to outside; Transmitted light is incident to lens (13); Focus on the metallic target (8) through lens (13).
3. a kind of induced with laser metallic target plasma according to claim 2 is realized the device of fuel gas igniting, it is characterized in that it also comprises binary channels energy meter (2), and a reverberation is incident to the probe of binary channels energy meter (2).
4. a kind of induced with laser metallic target plasma according to claim 3 is realized the device of fuel gas igniting, it is characterized in that it also comprises computer (1) and delay time generator (14), the time delayed signal output of described delay time generator (14) is connected with the time delayed signal input of Nd:YAG laser instrument (10), the time delayed signal input of binary channels energy meter (2); The energy value signal output part of described binary channels energy meter (2) is connected with the energy value signal input part of computer (1).
5. a kind of induced with laser metallic target plasma according to claim 4 is realized the device of fuel gas igniting, it is characterized in that it also comprises flow controller (3) and three electrically-controlled valve, and described three electrically-controlled valve are separately positioned on N
2The place, gas outlet of gas cylinder (4), O
2Place, gas outlet and the CH of gas cylinder (5)
4The place, gas outlet of gas cylinder (6); Three control signal outputs of described flow controller (3) are connected with the control signal input of three electrically-controlled valve.
6. a kind of induced with laser metallic target plasma according to claim 5 is realized the device of fuel gas igniting, it is characterized in that Nd:YAG laser instrument output Wavelength of Laser is 1064nm or 532nm; The pulse energy of output is between 0.2mJ～20mJ; Repetition rate is 1Hz～100Hz; Pulse width is 5ns～20ns.
7. a kind of induced with laser metallic target plasma according to claim 6 is realized the device of fuel gas igniting, and the material that it is characterized in that metallic target (8) is tungsten, tantalum or stainless steel.
8. a kind of induced with laser metallic target plasma according to claim 7 is realized the device of fuel gas igniting, and the splitting ratio that it is characterized in that spectroscope (12) is 5%～20%.
9. a kind of induced with laser metallic target plasma according to claim 8 is realized the device of fuel gas igniting, and the bore that it is characterized in that quartz ampoule (9) is 5mm～15mm.
10. a kind of induced with laser metallic target plasma according to claim 9 is realized the device of fuel gas igniting, and the focal length that it is characterized in that lens (13) is 50mm～250mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103086387A CN103343982A (en) | 2013-07-22 | 2013-07-22 | Method for enabling laser to induce metal target plasma to achieve ignition of flammable gas and device for achieving same |
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|---|---|---|---|
| CN2013103086387A CN103343982A (en) | 2013-07-22 | 2013-07-22 | Method for enabling laser to induce metal target plasma to achieve ignition of flammable gas and device for achieving same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969218A (en) * | 2014-05-24 | 2014-08-06 | 哈尔滨工业大学 | Non-contact flame temperature and OH radical concentration measurement device and non-contact flame temperature and OH radical concentration measurement method based on ultraviolet laser absorption spectrum |
| CN103982910A (en) * | 2014-05-30 | 2014-08-13 | 哈尔滨工业大学 | Method and device for improving blow-off limit of combustible gas through laser ablation of metal target plasma |
| CN104181160A (en) * | 2014-08-25 | 2014-12-03 | 南京理工大学 | Signal acquisition device based on experiments of laser-induced ignition of solid propellants |
| CN110514780A (en) * | 2019-08-27 | 2019-11-29 | 东北大学 | A kind of laser ignition measurement gas minimum ignition energy system and application method |
| CN113431723A (en) * | 2021-07-14 | 2021-09-24 | 吉林大学 | Optical fiber ablation ignition system and method based on femtosecond laser ignition |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969218A (en) * | 2014-05-24 | 2014-08-06 | 哈尔滨工业大学 | Non-contact flame temperature and OH radical concentration measurement device and non-contact flame temperature and OH radical concentration measurement method based on ultraviolet laser absorption spectrum |
| CN103982910A (en) * | 2014-05-30 | 2014-08-13 | 哈尔滨工业大学 | Method and device for improving blow-off limit of combustible gas through laser ablation of metal target plasma |
| CN103982910B (en) * | 2014-05-30 | 2016-11-09 | 哈尔滨工业大学 | Laser ablation metallic target plasma improves the method and device of fuel gas blow-off limit |
| CN104181160A (en) * | 2014-08-25 | 2014-12-03 | 南京理工大学 | Signal acquisition device based on experiments of laser-induced ignition of solid propellants |
| CN104181160B (en) * | 2014-08-25 | 2019-07-12 | 南京理工大学 | A kind of signal pickup assembly based on the experiment of solid propellant laser ignition |
| CN110514780A (en) * | 2019-08-27 | 2019-11-29 | 东北大学 | A kind of laser ignition measurement gas minimum ignition energy system and application method |
| CN113431723A (en) * | 2021-07-14 | 2021-09-24 | 吉林大学 | Optical fiber ablation ignition system and method based on femtosecond laser ignition |
| CN113431723B (en) * | 2021-07-14 | 2022-09-16 | 吉林大学 | Optical fiber ablation ignition system and method based on femtosecond laser ignition |
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Application publication date: 20131009 |