CN116669272A - High-temperature plasma jet generating device - Google Patents
High-temperature plasma jet generating device Download PDFInfo
- Publication number
- CN116669272A CN116669272A CN202310726407.1A CN202310726407A CN116669272A CN 116669272 A CN116669272 A CN 116669272A CN 202310726407 A CN202310726407 A CN 202310726407A CN 116669272 A CN116669272 A CN 116669272A
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- CN
- China
- Prior art keywords
- metal
- generating device
- base
- temperature plasma
- plasma jet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 86
- 239000002184 metal Substances 0.000 claims abstract description 86
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052802 copper Inorganic materials 0.000 claims abstract description 20
- 239000010949 copper Substances 0.000 claims abstract description 20
- 238000004880 explosion Methods 0.000 claims abstract description 20
- 239000012212 insulator Substances 0.000 claims abstract description 18
- -1 polyethylene Polymers 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 239000004698 Polyethylene Substances 0.000 abstract description 4
- 229920000573 polyethylene Polymers 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 3
- 230000010349 pulsation Effects 0.000 abstract 1
- 210000002381 plasma Anatomy 0.000 description 34
- 239000000126 substance Substances 0.000 description 14
- 238000005516 engineering process Methods 0.000 description 7
- 239000003380 propellant Substances 0.000 description 6
- 238000005485 electric heating Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41F—APPARATUS FOR LAUNCHING PROJECTILES OR MISSILES FROM BARRELS, e.g. CANNONS; LAUNCHERS FOR ROCKETS OR TORPEDOES; HARPOON GUNS
- F41F1/00—Launching apparatus for projecting projectiles or missiles from barrels, e.g. cannons; Harpoon guns
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/26—Plasma torches
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Engineering & Computer Science (AREA)
- Plasma Technology (AREA)
Abstract
The invention discloses a high-temperature plasma jet generating device which mainly comprises a nozzle, a connector, a metal shell, a pressure sensor, an insulator, a polyethylene capillary tube, a red copper diaphragm (cathode), an electric explosion wire, an anode and a metal base. When the electric energy of the pulse power source is loaded on two poles of the generating device, the electric explosion wire in the device can explode to form high-temperature metal plasma, ablate the wall surface of the capillary tube, further form a plasma mixture, and jet to form high-temperature plasma jet. By combining the influence characteristics of multiple parameters on the shape of the high-temperature plasma jet interface, the pulsation in the jet expansion process can be effectively controlled by adjusting the multiple parameters, and the stability of the jet interface is improved.
Description
Technical Field
The invention relates to the technical field of the stability control of the inner trajectory of a medium-large caliber electrothermal chemical gun, in particular to a novel high-temperature plasma jet and two-phase interface control device under the electrothermal chemical emission technology.
Background
One of the important applications of plasmas in the military field is the electrothermal chemical Emission (ETC), which is a new concept of ultra-high-speed emission technology. The electric heating chemical cannon is the application of ETC launching technology on cannons, and its core process is that an external pulse power supply discharges to produce plasma with higher temperature, and after the plasma ignites the energetic working medium, a large amount of chemical energy is released, i.e. the plasma is used as a medium to combine electric energy with chemical energy, and the combined action promotes the projectile to accelerate movement. Compared with the conventional artillery, the electric heating chemical artillery has the advantages of short ignition delay time, better ignition consistency and good compatibility, and the internal ballistic performance of the artillery can be improved by adjusting the external electric energy input; compared with electric heating cannons and electromagnetic cannons, most of the energy of the electric heating chemical cannon accelerating projectile is still chemical energy from the propellant powder, so that the required electric energy is smaller, and the miniaturization of a power supply is facilitated. Thus, ETC transmission technology is considered as one of the most promising new concept transmission technologies.
The ignition process of the propellant powder is one of the important factors of the formation of initial pressure waves in the ballistic chamber of the gun, and the ignition structure, the ignition energy and the ignition conditions are not satisfied, so that the pressure waves in the chamber are possibly increased continuously, thereby causing the breakage of propellant powder particles and even the occurrence of a rifling accident in serious cases. In electrothermal chemical cannons, the plasma is used as an ignition source, which determines the stability and consistency of the initial ignition combustion process of the gun charge. Therefore, the electrothermal chemical emission technology has special requirements on the plasma generator, and the plasma generator needs to absorb a large amount of electric energy in a very short time, ablate the capillary wall to form high-pressure high-temperature plasma jet, stably spray into a combustion chamber containing propellant, and ignite the propellant therein.
Disclosure of Invention
The invention aims to solve the problems of charge ignition reliability and stability under the electrothermal chemical emission technology, and provides a high-temperature plasma jet generating device which can form continuous and stable plasma jet by adjusting pulse discharge voltage and a jet structure.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a high-temperature plasma jet generating device comprises a nozzle, a connector, a metal shell, a pressure sensor, a red copper diaphragm, an insulator, a capillary tube, an electric explosion wire, a metal block, a metal inner core, an insulating base, an insulating cover plate, a metal base, an insulating sleeve and an anode;
one end of the nozzle is connected with one end of the connector through threads; one end of the metal shell is connected with the other end of the connector through external threads; meanwhile, a pressure measuring threaded hole is formed in the side face of the metal shell, and the pressure sensor is screwed into the threaded hole; the metal shell is internally provided with an inner hole with a variable diameter, and a red copper diaphragm is placed at the position with the variable diameter; the insulator is inserted from one end of the large-diameter inner hole of the metal shell and compresses the red copper diaphragm; the capillary is embedded in the inner hole of the insulator; a small hole is formed in the center of the upper surface of the metal block, and one end of the electric explosion wire is clamped into the small hole; one end of the metal block provided with the electric explosion wire is inserted into the inner hole of the insulator, and the electric explosion wire in the metal block is ensured to be tightly pressed with the red copper diaphragm; the other end of the metal block is connected with the metal inner core through external threads; meanwhile, pressing an annular insulating cover plate at the joint; placing a concave insulating base inside the metal base, tightly connecting the metal base with the insulating base with the other end of the metal shell through internal threads, and ensuring that the insulating base and an insulating cover plate are tightly pressed; the corresponding positions of the metal inner core, the insulating base and the side surface of the metal base are provided with a small hole, wherein the small hole on the side surface of the metal inner core is a threaded hole, and the other two holes are through holes with slightly larger radius; embedding an insulating sleeve in the through holes on the side surfaces of the insulating base and the metal base; the anode is inserted from the inner hole of the insulating sleeve and screwed into the threaded hole on the side surface of the metal inner core.
The invention is based on an electrothermal chemical gun ignition system, shows the interface evolution characteristic of high-temperature plasma jet and the multiphase turbulence effect of plasma-gas/liquid/solid, and further combines the influences of parameters such as pulse discharge voltage intensity, nozzle size structure, diameter of an electric explosion wire and the like on the interface shape of the plasma jet, can effectively control the pulsivity in the jet expansion process, improves the stability of the jet interface, and ensures that the ignition process of the electrothermal chemical charging structure is safer and more reliable.
Drawings
FIG. 1 is a block diagram of a high temperature plasma jet generating device according to the present invention.
Detailed Description
The device mainly comprises a nozzle, a connector, a metal shell, a pressure sensor, an insulator, a polyethylene capillary tube, a red copper diaphragm (cathode), an electric explosion wire, an anode and a metal base. The uppermost end of the whole device is a special steel plasma jet nozzle, and the nozzle opening can face to propellant or atmosphere according to actual requirements. Meanwhile, the nozzle is connected with the special steel metal shell of the launching device through the special steel connector, and the connector has a flow guiding function and is used for ensuring that after plasma is formed, the plasma can be ejected from the steel nozzle in a high-speed and stable jet flow mode. The side of the metal shell is provided with a pressure measuring threaded hole, and is provided with a pressure sensor for measuring the pressure change characteristic in the capillary tube in the plasma forming process. The metal shell is connected with the metal base through threads and grounded. An insulator made of polytetrafluoroethylene is embedded in the metal shell, and a thin red copper diaphragm is placed at the outlet of the insulator in the metal shell. The red copper diaphragm is in electrical conduction communication with the metal housing and together serves as the cathode of the plasma generating device. A polyethylene capillary tube with the length of 73mm and the inner diameter of 4mm is placed in an annular insulator in a metal shell, and a metal electric explosion wire is placed in the center of an inner hole of the capillary tube, is made of an elongated aluminum foil sheet and penetrates through the whole capillary tube. One end of the metal base is provided with a threaded hole for being connected with an anode of the generating device, and the anode is made of steel materials. When the electric energy of the pulse power source is loaded on two poles of the generating device, an electric explosion wire in the device is used as an initial electric energy load to start explosion to form high-temperature metal plasma, the peripheral polyethylene capillary wall surface is ablated, a plasma mixture is further formed, after the pressure in the capillary exceeds the rupture pressure of a red copper diaphragm at the outlet of the capillary, the diaphragm is broken by the plasma, the plasma is ejected from the capillary, and high-temperature plasma jet is formed by the ejection from a nozzle after passing through a connector.
The invention is further described below with reference to the drawings.
Referring to fig. 1, a high temperature plasma jet generating apparatus includes a nozzle 1; a connector 2; a metal housing 3; a pressure sensor 4; a red copper diaphragm cathode 5; an insulator 6; a capillary tube 7; an electric explosion wire 8; a metal block 9; a metal core 10; an insulating base 11; an insulating cover sheet 12; a metal base 13; an insulating sleeve 14; and an anode 15.
Manufacturing all parts of the generating device according to a drawing, selecting proper inner and outer diameter sizes of the nozzle 1 and the connector 2, and connecting one end of the nozzle 1 with one end of the connector 2 through threads; one end of the metal shell 3 is connected with the other end of the connector 2 through external threads; meanwhile, a pressure measuring threaded hole is formed in the side face of the metal shell 3, and the pressure sensor 4 is screwed into the threaded hole; the metal shell 3 is internally provided with an inner hole with a variable diameter, and a red copper diaphragm 5 is arranged at the position with the variable diameter; inserting an insulator 6 from one end of a large-diameter inner hole of the metal shell 3 and pressing the red copper diaphragm 5; subsequently, the capillary 7 is inserted into the inner hole of the insulator 6. A small hole is formed in the center of the upper surface of the metal block 9, and one end of the electric explosion wire 8 is clamped into the small hole; further, one end of a metal block 9 provided with the electric explosion wire 8 is inserted into an inner hole of the insulator 6, and the electric explosion wire 8 and the red copper diaphragm 5 in the metal block are ensured to be pressed tightly; the other end of the metal block 9 is connected with a metal inner core 10 through external threads. At the same time, the annular insulating cover sheet 12 is pressed in at the junction; an insulating base 11 in a concave shape is placed in the metal base 13, the metal base 13 with the insulating base 11 is tightly connected with the metal shell 3 through internal threads, and the insulating base 11 and the insulating cover plate 12 are ensured to be tightly pressed, so that electric leakage is avoided. The corresponding positions of the side surfaces of the metal inner core 10, the insulating base 11 and the metal base 13 are provided with a small hole, wherein the small hole of the side surface of the metal inner core 10 is a threaded hole, and the other two holes are through holes with larger radius. An insulating sleeve 14 is embedded in the through holes on the side surfaces of the insulating base 11 and the metal base 13. Finally, the anode 15 is inserted from the inner hole of the insulating sleeve 14 and screwed into the threaded hole on the side of the metal core 10, thereby completing the installation.
The high temperature plasma jet generation process is as follows: by loading electric energy to the two ends of the anode 15 and the cathode 5 of the generating device, the electric explosion wire 8 starts to explode to form high-temperature metal plasma, and the high-temperature metal plasma is continuously ablated to melt the inner wall surface of the capillary 7 around, so that the inside of the capillary 7 is continuously ionized to generate a high-temperature capillary plasma mixture. When the pressure in the capillary tube 7 exceeds the rupture pressure of the red copper diaphragm 5, the red copper diaphragm 5 is ruptured by high-temperature plasma, and the high-temperature plasma is ejected from the nozzle 1 of the generating device through the connector 2, so that high-temperature high-pressure high-speed plasma jet is formed.
The foregoing has outlined and described the basic principles, features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A high temperature plasma jet generating device, characterized in that: the device comprises a nozzle (1), a connector (2), a metal shell (3), a pressure sensor (4), a red copper diaphragm (5) (cathode), an insulator (6), a capillary tube (7), an electric explosion wire (8), a metal block (9), a metal inner core (10), an insulating base (11), an insulating cover plate (12), a metal base (13), an insulating sleeve (14) and an anode (15);
one end of the nozzle (1) is connected with one end of the connector (2) through threads; one end of the metal shell (3) is connected with the other end of the connector (2) through external threads; meanwhile, a pressure measuring threaded hole is formed in the side face of the metal shell (3), and the pressure sensor (4) is screwed into the threaded hole; an inner hole with a variable diameter is formed in the metal shell (3), and a red copper diaphragm (5) is placed at the position with the variable diameter; the insulator (6) is inserted from one end of the large-diameter inner hole of the metal shell (3) and compresses the red copper diaphragm (5); the capillary tube (7) is embedded in the inner hole of the insulator (6); a small hole is formed in the center of the upper surface of the metal block (9), and one end of the electric explosion wire (8) is clamped into the small hole; one end of a metal block (9) provided with an electric explosion wire (8) is inserted into an inner hole of the insulator (6) and ensures that the electric explosion wire (8) and the red copper diaphragm (5) are tightly pressed; the other end of the metal block (9) is connected with a metal inner core (10) through external threads; simultaneously, pressing in an annular insulating cover plate (12) at the joint; an insulating base (11) in a concave shape is placed in the metal base (13), the metal base (13) with the insulating base (11) is tightly connected with the other end of the metal shell (3) through internal threads, and the insulating base (11) and an insulating cover plate (12) in the metal base are ensured to be tightly pressed; the corresponding positions of the side surfaces of the metal inner core (10), the insulating base (11) and the metal base (13) are provided with a small hole, wherein the small hole on the side surface of the metal inner core (10) is a threaded hole, and the other two holes are through holes with larger radius; an insulating sleeve (14) is embedded in the through holes on the side surfaces of the insulating base (11) and the metal base (13); the anode (15) is inserted from the inner hole of the insulating sleeve (14) and screwed into the threaded hole on the side surface of the metal inner core (10).
2. The high temperature plasma jet generating device according to claim 1, wherein: the red copper membrane (5) is electrically connected with the metal shell (3) and jointly serves as a cathode of the generating device.
3. The high temperature plasma jet generating device according to claim 1, wherein: the insulator (6) is made of polytetrafluoroethylene.
4. The high temperature plasma jet generating device according to claim 1, wherein: the nozzle (1), the connector (2), the metal shell (3), the metal block (9) and the metal inner core (10) are all made of special steel materials.
5. The high temperature plasma jet generating device according to claim 1, wherein: the anode (15) is made of a metal steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310726407.1A CN116669272A (en) | 2023-06-19 | 2023-06-19 | High-temperature plasma jet generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310726407.1A CN116669272A (en) | 2023-06-19 | 2023-06-19 | High-temperature plasma jet generating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116669272A true CN116669272A (en) | 2023-08-29 |
Family
ID=87720621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310726407.1A Pending CN116669272A (en) | 2023-06-19 | 2023-06-19 | High-temperature plasma jet generating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116669272A (en) |
-
2023
- 2023-06-19 CN CN202310726407.1A patent/CN116669272A/en active Pending
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