CN105021765A - Flame resisting device in laser ignition experiment of solid propellant - Google Patents
Flame resisting device in laser ignition experiment of solid propellant Download PDFInfo
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- CN105021765A CN105021765A CN201510466110.1A CN201510466110A CN105021765A CN 105021765 A CN105021765 A CN 105021765A CN 201510466110 A CN201510466110 A CN 201510466110A CN 105021765 A CN105021765 A CN 105021765A
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Abstract
The invention discloses a flame resisting device in a laser ignition experiment of a solid propellant. The flame resisting device comprises a laser lens, a reflection cavity shell, a first laser reflection mirror, a second laser reflection mirror, a reflection mirror bracket, a flame resisting barrel and a retractable light emitting cover. The flame resisting barrel comprises two cylindrical bodies with different diameters; one end of the cylindrical body with a small diameter is fixedly connected with a first through hole and the other end of the cylindrical body is fixedly connected with the cylindrical body with a large diameter; the cylindrical body with the large diameter is fixedly connected with the retractable light emitting cover; and the first laser reflection mirror and the second laser reflection mirror adopt molybdenum reflection mirrors. The flame resisting device further comprises two fine adjustment screws; and one end of each of the two fine adjustment screws penetrates through the reflection cavity shell to abut against a free end of the laser reflection mirror bracket, so that angles of the laser reflection mirrors are finely adjusted. By virtue of the flame resisting device, the laser ignition experiment of the solid propellant with a short flame length and a laser experiment of the solid propellant with a high flame length can be carried out in the same combustion chamber.
Description
Technical field
The invention belongs to solid propellant laser ignition field, the resistance flame device particularly during a kind of solid propellant laser ignition experiment.
Background technology
Because laser is as radiation source in research solid propellant ignition burning performance, the energy exported because of it is high, and exposure time and output energy adjustable, can independent of initial temperature, pressure and gas group grade environmental parameter select energy density, decrease the thermal loss in experimentation and heterogeneous effect, favorable repeatability, the advantages such as electromagnetism interference, become the Novel ignition mode of research solid propellant both at home and abroad, but because carbon dioxide laser is invisible light, in order to can not heighten to light difficulty with by the height of lab space restriction firing chamber when reducing test, irradiation propellant flame height when laser ignition is tested due to superlaser can be very high, when flame height is too high, laser-transmitting eyeglass higher for price above flame can be burnt, the device of laser lens is not protected in now conventional burning mostly, such as Zhu Guoqiang proposes in " research of SFRJ ignition process " literary composition, firing chamber is positioned at propellant and is in immediately below laser lens, but the higher propellant fire experiment of flame height cannot be done in this firing chamber.Gong Lunkun also refer to the device of a kind of laser ignition experiment in " the radiation igniting of fourth hydroxyl composite propellant " literary composition, and the laser lens of this covering device is also in directly over propellant, also cannot carry out the propellant laser ignition experiment of the high length of flame.
Summary of the invention
Resistance flame device when the object of the present invention is to provide a kind of solid propellant laser ignition to test, solves the Flame of Solid Propellant too high problem burning out laser lens when laser ignition is tested.
The technical solution realizing the object of the invention is: resistance flame device during a kind of solid propellant laser ignition experiment, comprises laser lens, reflection cavity housing, the first laser mirror, the second laser mirror, mirror support, resistance flame cylinder and shrinkage type and go out light shield, laser lens, first laser mirror, second laser mirror and mirror support are all arranged in reflection cavity housing, reflection cavity case top is provided with stepped hole, bottom is provided with the first through hole, first through hole and stepped hole heteropleural, laser lens is fixed in described stepped hole, first laser mirror and the second laser mirror are separately fixed on two mirror supports, mirror support one end is hinged on reflection cavity inner walls, first laser mirror and heteropleural parallel with the second laser mirror, laser lens is positioned in the input path of the first laser mirror, second laser mirror is positioned on the emitting light path of the first laser mirror, first through hole is positioned on the reflected light path of the second laser mirror, resistance flame cylinder comprises the different right cylinder of two diameters, and the cylindrical member at one end that diameter is little and the first through hole are connected, and the other end and the large right cylinder of diameter are connected, and the right cylinder other end that diameter is large and shrinkage type go out light shield and be connected, the right cylinder that diameter is little is provided with the second through hole, the different through hole of two diameters is provided with in the right cylinder that diameter is large, wherein third through-hole diameter is less than the diameter of fourth hole, third through-hole communicates with the second through hole and diameter is identical, centered by third through-hole, be provided with a circle groove at the right cylinder top that diameter is large, the outer wall of groove is provided with several vent ports.
Described first laser mirror and the second laser mirror all adopt molybdenum catoptron.
The outlet diameter that described shrinkage type goes out light shield is less than the diameter of fourth hole.
The resistance flame device during experiment of solid propellant laser ignition, also comprise two micrometer adjusting screws, two micrometer adjusting screw one end, all through reflection cavity housing, prop up the free end of laser reflection mirror support, finely tune the angle of laser mirror.
Compared with prior art, its remarkable advantage is in the present invention: the laser ignition experiment of the solid propellant of the short length of flame both can have been done in (1) same firing chamber, also can do the Laser Experiments of the solid propellant of the high length of flame.
(2) if flame height is too high, when stretching into the reflection cavity housing being positioned at resistance flame cylinder top, the laser lens that cost is high can not be burnt out, save experimental cost.
(3) structure is simple, cheap.
Accompanying drawing explanation
The general structure schematic diagram of resistance flame device when Fig. 1 is solid propellant laser ignition of the present invention experiment.
The schematic three dimensional views of resistance flame device when Fig. 2 is solid propellant laser ignition of the present invention experiment.
The resistance flame barrel structure schematic diagram of resistance flame device when Fig. 3 is solid propellant laser ignition of the present invention experiment.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Composition graphs 1 ~ Fig. 3, resistance flame device during a kind of solid propellant laser ignition experiment, comprise laser lens 2, reflection cavity housing, first laser mirror 5-1, second laser mirror 5-2, mirror support 6, resistance flame cylinder 9 and shrinkage type go out light shield 10, laser lens 2, first laser mirror 5-1, second laser mirror 5-2 and mirror support 6 are all arranged in reflection cavity housing, reflection cavity case top is provided with stepped hole, bottom is provided with the first through hole, first through hole and stepped hole heteropleural, laser lens 2 is fixed in described stepped hole, first laser mirror 5-1 and the second laser mirror 5-2 is separately fixed on two mirror supports 6, mirror support 6 one end is hinged on reflection cavity inner walls, first laser mirror 5-1 and heteropleural parallel with the second laser mirror 5-2, laser lens 2 is positioned in the input path of the first laser mirror 5-1, second laser mirror 5-2 is positioned on the emitting light path of the first laser mirror 5-1, first through hole is positioned on the reflected light path of the second laser mirror 5-2.Resistance flame cylinder 9 comprises the different right cylinder of two diameters, and the cylindrical member at one end that diameter is little and the first through hole are connected, and the other end and the large right cylinder of diameter are connected, and the right cylinder other end that diameter is large and shrinkage type go out light shield 10 and be connected.The right cylinder that diameter is little is provided with the second through hole, the different through hole of two diameters is provided with in the right cylinder that diameter is large, wherein third through-hole diameter is less than the diameter of fourth hole, third through-hole communicates with the second through hole and diameter is identical, centered by third through-hole, be provided with a circle groove at the right cylinder top that diameter is large, the outer wall of groove is provided with several vent ports.
First laser mirror 5-1 and the second laser mirror 5-2 all adopts molybdenum catoptron.
Also comprise two micrometer adjusting screws, 4, two micrometer adjusting screw one end all through reflection cavity housing, prop up the free end of laser reflection mirror support 6, the angle of laser mirror is finely tuned.
The outlet diameter that shrinkage type goes out light shield 10 is less than the diameter of fourth hole.
Embodiment 1
Resistance flame device during a kind of solid propellant laser ignition experiment, comprise laser lens 2, reflection cavity housing, first laser mirror 5-1, second laser mirror 5-2, resistance flame cylinder 9 and shrinkage type go out light shield 10, first laser mirror 5-1, second laser mirror 5-2 and mirror support 6 are all arranged in reflection cavity housing, reflection cavity housing is detachable, reflection cavity case top is provided with stepped hole, bottom is provided with the first through hole, first through hole and stepped hole heteropleural, laser lens 2 is fixed in described stepped hole, fixed by clamp nut, first laser mirror 5-1 and the second laser mirror 5-2 is separately fixed on two mirror supports 6, mirror support 6 one end is hinged on reflection cavity inner walls by rotating shaft 8, rotating shaft 8 is provided with torsion spring, first laser mirror 5-1 is parallel with the second laser mirror 5-2 and be positioned at the parallel sidewall of reflection cavity housing two, laser lens 2 is positioned in the input path of the first laser mirror 5-1, second laser mirror 5-2 is positioned on the emitting light path of the first laser mirror 5-1, first through hole is positioned on the reflected light path of the second laser mirror 5-2.Resistance flame cylinder 9 comprises the different right cylinder of two diameters, and two right cylinders are one-body molded, and the cylindrical member at one end that diameter is little and the first through hole are connected by screw thread, and the right cylinder that diameter is large is gone out light shield 10 again and is connected by screw thread with shrinkage type.The right cylinder that diameter is little is provided with the second through hole, the different through hole of two diameters is provided with in the right cylinder that diameter is large, wherein third through-hole diameter is less than the diameter of fourth hole, third through-hole communicates with the second through hole and diameter is identical, centered by third through-hole, be provided with a circle groove at the right cylinder top that diameter is large, the outer wall of groove is circumferentially arranged with 4 vent ports.
First laser mirror 5-1 and the second laser mirror 5-2 all adopts molybdenum catoptron.
Also comprise two micrometer adjusting screws, 4, two micrometer adjusting screw 4 one end all through reflection cavity housing, two micrometer adjusting screws 4 prop up the free end of laser reflection mirror support 6 respectively, realize the fine setting to laser reflection mirror angle.
The outlet diameter that shrinkage type goes out light shield 10 is less than the diameter of fourth hole.
The course of work is as follows:
By the most accurate for the light-emitting window of laser instrument laser lens 2, laser is made to enter reflection cavity housing from laser lens 2, the angle of laser mirror 5 is constantly adjusted by micrometer adjusting screw 4, until laser can go out immediately below light shield 10 to penetrate from shrinkage type, resistance flame device when being tested by solid propellant laser ignition puts into firing chamber, the position of fine setting firing chamber and angle, until laser can go out light shield 10 by shrinkage type be irradiated to solid propellant surface.When solid propellant flame in short-term, flame can not contact shrinkage type and go out light shield 10, when the flame height of solid propellant is higher, even if the light-emitting window that flame can go out light shield 10 by shrinkage type enters into resistance flame cylinder 9, flame from pore to large space time flame can spread, reduce the height of flame, the groove at resistance flame cylinder 9 inwall top, the effect of gathering is had to flame, the flame being diffused into this is discharged to resistance flame cylinder 9 outside by the vent port of resistance flame cylinder 9, even if after resistance flame cylinder 9, flame height is still very high, flame can only enter reflection cavity housing by the second through hole, burn the second laser reflection eyeglass 5-2, the price of this laser mirror is far below the price of laser lens 2, the cost changing laser mirror 5-2 is lower than the cost directly changing laser lens 2.
The present invention both can do the laser ignition experiment of the solid propellant of the short length of flame to same firing chamber, also can do the Laser Experiments of the solid propellant of the high length of flame.If flame height is too high, when stretching into the reflection cavity housing being positioned at resistance flame cylinder top, the laser lens that cost is high can not be burnt out, save experimental cost.Structure is simple, cheap.
Claims (4)
1. the resistance flame device during experiment of solid propellant laser ignition, is characterized in that: comprise laser lens (2), reflection cavity housing, the first laser mirror (5-1), the second laser mirror (5-2), mirror support (6), resistance flame cylinder (9) and shrinkage type and go out light shield (10), laser lens (2), first laser mirror (5-1), second laser mirror (5-2) and mirror support (6) are all arranged in reflection cavity housing, reflection cavity case top is provided with stepped hole, bottom is provided with the first through hole, first through hole and stepped hole heteropleural, laser lens (2) is fixed in described stepped hole, first laser mirror (5-1) and the second laser mirror (5-2) are separately fixed on two mirror supports (6), mirror support (6) one end is hinged on reflection cavity inner walls, first laser mirror (5-1) and heteropleural parallel with the second laser mirror (5-2), laser lens (2) is positioned in the input path of the first laser mirror (5-1), second laser mirror (5-2) is positioned on the emitting light path of the first laser mirror (5-1), first through hole is positioned on the reflected light path of the second laser mirror (5-2), resistance flame cylinder (9) comprises the different right cylinder of two diameters, and the cylindrical member at one end that diameter is little and the first through hole are connected, and the other end and the large right cylinder of diameter are connected, and the right cylinder other end that diameter is large and shrinkage type go out light shield (10) and be connected, the right cylinder that diameter is little is provided with the second through hole, the different through hole of two diameters is provided with in the right cylinder that diameter is large, wherein third through-hole diameter is less than the diameter of fourth hole, third through-hole communicates with the second through hole and diameter is identical, centered by third through-hole, be provided with a circle groove at the right cylinder top that diameter is large, the outer wall of groove is provided with several vent ports.
2. resistance flame device during solid propellant laser ignition experiment according to claim 1, is characterized in that: described first laser mirror (5-1) and the second laser mirror (5-2) all adopt molybdenum catoptron.
3. resistance flame device during solid propellant laser ignition according to claim 1 experiment, is characterized in that: the outlet diameter that described shrinkage type goes out light shield (10) is less than the diameter of fourth hole.
4. resistance flame device during solid propellant laser ignition experiment according to claim 1, it is characterized in that: also comprise two micrometer adjusting screws (4), two micrometer adjusting screw one end are all through reflection cavity housing, prop up the free end of laser reflection mirror support (6), the angle of laser mirror is finely tuned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510466110.1A CN105021765B (en) | 2015-07-31 | 2015-07-31 | A kind of resistance flame device during solid propellant laser ignition experiment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510466110.1A CN105021765B (en) | 2015-07-31 | 2015-07-31 | A kind of resistance flame device during solid propellant laser ignition experiment |
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| CN105021765A true CN105021765A (en) | 2015-11-04 |
| CN105021765B CN105021765B (en) | 2016-07-06 |
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| CN201510466110.1A Expired - Fee Related CN105021765B (en) | 2015-07-31 | 2015-07-31 | A kind of resistance flame device during solid propellant laser ignition experiment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106764727A (en) * | 2017-01-23 | 2017-05-31 | 中山米戈尔照明有限公司 | A kind of secondary reflection LED down lamp |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1603175A1 (en) * | 1988-06-02 | 1990-10-30 | Предприятие П/Я Р-6681 | Method of ingniting fuel gas |
| DE102006031768B4 (en) * | 2006-07-10 | 2018-10-25 | Robert Bosch Gmbh | Ignition device for an internal combustion engine |
| CN201174495Y (en) * | 2008-04-09 | 2008-12-31 | 北京航空航天大学 | Laser light generating apparatus |
| 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 |
| CN104596768B (en) * | 2015-01-13 | 2017-04-12 | 浙江大学 | Device for testing ignition combustion characteristics and propulsive performance of solid fuel micro-thruster |
| CN204882484U (en) * | 2015-07-31 | 2015-12-16 | 南京理工大学 | Flame trap when experiment is igniteed to solid propellant laser |
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2015
- 2015-07-31 CN CN201510466110.1A patent/CN105021765B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106764727A (en) * | 2017-01-23 | 2017-05-31 | 中山米戈尔照明有限公司 | A kind of secondary reflection LED down lamp |
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| CN105021765B (en) | 2016-07-06 |
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