CN102781157A - Planar jet flow plasma generating device - Google Patents
Planar jet flow plasma generating device Download PDFInfo
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- CN102781157A CN102781157A CN2012102452907A CN201210245290A CN102781157A CN 102781157 A CN102781157 A CN 102781157A CN 2012102452907 A CN2012102452907 A CN 2012102452907A CN 201210245290 A CN201210245290 A CN 201210245290A CN 102781157 A CN102781157 A CN 102781157A
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Abstract
The invention discloses a planar jet flow plasma generating device, mainly to solve the problems that an existing planar jet flow plasma generating device is poor in plasma stability, high in temperature, small in area and uneven in density and velocity distribution. The whole device comprises a plasma generating chamber (2), a power supply device (3) and a pressure adjusting device (5), wherein the left side and the right side of the plasma generating chamber (2) are respectively connected with a diversion device (1) and a plasma jet flow chamber (4); an air inlet end of the diversion device (1) and an air outlet end of the plasma jet flow chamber (4) are connected with the pressure adjusting device (5); an electrode through hole and an observation window for applying an orthogonal electromagnetic two-dimensional field are formed on the plasma jet flow chamber (4); and the power supply device (3) is used for supplying power for the plasma generating chamber (2). With the adoption of the device, the plasma duration time is prolonged, the temperature of the plasma is reduced, the area of the even plasma is expanded, and the device can be used for researching the influence of an electromagnetic field on the jet flow plasma.
Description
Technical field
The invention belongs to the gas discharge plasma field, particularly the plane jet plasma generating device can be used for producing than the even jet plasma of large tracts of land the influence of quantitative study electromagnetism two dimensional field article on plasma fluid.
Background technology
The influence of research electromagnetism two dimensional field article on plasma fluid is the basis that space vehicle is written into research work, and true experiment need a kind ofly can produce large tracts of land controllable density and the at the uniform velocity mobile uniformly plasma generating device of Two dimensional Distribution for a long time.The device that existing ground produces plasma mainly contains shock tube, plasma jet and glow plasma fluidic device, the shortcoming that these devices are difficult to overcome below existing respectively:
1, shock tube utilizes the TRANSIENT HIGH TEMPERATURE generation plasma that the High Voltage difference produces, and the duration is extremely short, and stable extreme difference is difficult to control.
2, the plasma temperature of plasma jet generation is high, and plasma density and distribution are difficult to control, and additional electrodes is had high temperature ablation, and also has metal ion in the plasma, causes that electromagnetism weakens experimental error.
3, the plasma of the plasma generation of glow discharge generation; Though work that can the long period; Electron density can be regulated continuously, and is also comparatively stable, but the plasma that produces basically all is the long arc shape turbulent plasma; Density Two dimensional Distribution area is little and inhomogeneous, influence that can't quantitative study electromagnetism two dimensional field article on plasma fluid.
Summary of the invention
The objective of the invention is to deficiency, a kind of plane jet plasma generating device is provided,, reduce temperature, enlarge the area of homogeneous plasma to prolong the duration to above-mentioned prior art.
For realizing above-mentioned purpose; The present invention includes: plasma generation cavity 2, supply unit 3 and barometric control unit 5; Supply unit 3 provides power supply for plasma generation cavity 2, it is characterized in that: the left side of plasma generation cavity 2 and right side are connected with guiding device 1 and plasma jet cavity 4 respectively; The outlet side of the inlet end of guiding device 1 and plasma jet cavity 4 is connected with barometric control unit 5, and plasma jet cavity 4 has electrode through hole and observation window, is used to apply quadrature electromagnetism two dimensional field; Gas charges into guiding device 1 from barometric control unit 5; Behind the guiding device current stabilization, flow in the plasma generation cavity 2; Discharge generation plasma in the plasma generation cavity flow in the plasma jet cavity 4, flows out through barometric control unit 5 again.
As preferably, described guiding device 1 comprises: needle-valve 101, first flange 102, baffle plate 103 and first barometer 106; One end of needle-valve 101 is fixed on the left end of first flange 102, and the other end is connected with barometric control unit 5; First barometer 106 is fixed on the lower end of first flange 102, is used to measure the air pressure of inflation; Baffle plate 103 is placed in the right-hand member groove of first flange 102; First flange 102 is connected with plasma generation cavity 2 through knob.
As preferably, described plasma generation cavity 2 comprises: second flange 206, cylinder electrode 201, tubular electrode 204 and the 3rd flange 207; Second flange 206 and the 3rd flange 207 are connected cylinder electrode 201 symmetrical both sides through hole ends; Cylinder electrode is fixed with circular hollow lid 205 respectively in both sides about in the of 201, and seals through pushing first seal gasket 203; Tubular electrode 204 inserts in the cylinder electrode 201 through the centre bore of circular hollow lid 205, the coaxial two ends up and down that are fixed on cylinder electrode 201, and push second seal gasket 208 through nut and seal; Tubular electrode 204 is connected with supply unit 3 through lead; The 3rd flange 207 is connected with plasma jet cavity 4.
As preferably, described plasma jet cavity 4 comprises: the 4th flange 403, cuboid cavity 401 and trumpet type guiding gutter 404; The 4th flange 403 is fixed on the left side of cuboid cavity 401; The typhon mouth of trumpet type guiding gutter 404 is fixed on the right side of cuboid cavity 401; The toy trumpet mouth of trumpet type guiding gutter 404 is fixed with extraction valve 405, and this extraction valve 405 is connected with barometric control unit 5; Described cuboid cavity 401 left and right sides have first guiding gutter 408 and second guiding gutter 409; The both sides, front and back of cuboid cavity 401 have observation window 402, observation window 402 sealing and fixing, and the outside applies magnetic field; The upside of cuboid cavity 401 has first through hole 410 and second through hole 411, in these two through holes, inserts electrode and applies electric field.
As preferably, described barometric control unit 5 comprises: second barometer 501, aspiration pump 502 and gas tank 503; Gas tank 503 is connected with needle-valve 101, and aspiration pump 502 is connected with extraction valve 405; Second barometer 501 is fixed on the bleeding point of aspiration pump 502, is used for measuring the air pressure of bleeding.
Compare existing ground plasma device, the present invention has the following advantages:
1, the present invention has improved the stability of air-flow owing to adopt guiding device, forms uniform flow field.
2, the present invention is owing to adopt plasma to produce cavity, and utilization low pressure glow discharge principle has prolonged the sustainable time of plasma, has improved the repeatability of test.
3, the present invention has enlarged the area in the even velocity of flow district of plasma jet owing to using plasma jet cavity, can apply crossed electric and magnetic field by the article on plasma body, realizes the research of the electromagnetism inhibition method of article on plasma body.Below in conjunction with accompanying drawing the present invention is described further:
Description of drawings
Fig. 1 is the overall structure planing surface figure of jet plasma generation device of the present invention;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the plasma jet cavity body structure figure among the present invention.
Embodiment
See figures.1.and.2; Plane jet plasma generating device of the present invention; Comprise: guiding device 1, plasma generation cavity 2, supply unit 3, plasma jet cavity 4 and barometric control unit 5; This plasma produces cavity 2 and is connected with guiding device 1, supply unit 3 and plasma jet cavity 4 respectively; This barometric control unit 5 is connected with plasma jet cavity 4 with guiding device 1 respectively, and plasma jet cavity 4 has electrode through hole and observation window, is used to apply quadrature electromagnetism two dimensional field; Gas charges into guiding device 1 from barometric control unit 5; Behind the guiding device current stabilization, flow in the plasma generation cavity 2; Discharge generation plasma in the plasma generation cavity flow in the plasma jet cavity 4, flows out through barometric control unit 5 again.Wherein:
Guiding device 1 comprises needle-valve 101, first flange 102, baffle plate 103 and barometer 106; Needle-valve 101 1 ends are fixed on first flange, 102 left ends, and baffle plate 103 is positioned in the right-hand member groove of first flange 102, has evenly distributed manhole 107 on the baffle plate 103;
Plasma generation cavity 2 comprises cylinder electrode 201, circular cap 205, tubular electrode 204, second flange 206 and the 3rd flange 207; Cylinder electrode 201 symmetrical both sides have through hole, and second flange 206 and the 3rd flange 207 are respectively through being welded to connect at cylinder electrode 201 symmetrical both sides through hole ends; Circular hollow lid 205 employing tightening knobs 202 are fixed in cylinder electrode, and about in the of 201 both sides, and seal through pushing first seal gasket 203; Cylinder electrode 201 ground connection; Tubular electrode 204 inserts in the cylinder electrode 201 through the centre bore of circular hollow lid 205; And with cylinder electrode 201 coaxial placements; The tubular electrode adopts clamp nut and circular hollow lid 205 to fix in two ends about in the of 204, and seals through pushing second seal gasket 208;
With reference to Fig. 3, plasma jet cavity 4 comprises the 4th flange 403, cuboid cavity 401 and trumpet type guiding gutter 404; The left and right sides of cuboid cavity 401 has first guiding gutter 408 and second guiding gutter 409; Be used for the stable plasma jet velocity, the both sides, front and back have observation window 402, and carry out sealing and fixing through clamp nut; Be used to observe plasma jet; The upside of cuboid cavity 401 has in two through holes 410 and 411, the first through holes 410 and second through hole 411 and is inserted with electrode 412, and this electrode connects direct voltage source 413; Apply electric field, outside observation window 402, apply stationary magnetic field simultaneously with the electric field quadrature; The 4th flange 403 is through being welded to connect at cuboid cavity 401 left ends, and the typhon mouth of trumpet type guiding gutter 404 is fixed with extraction valve 405 through being welded to connect at cuboid cavity 401 right-hand members on the toy trumpet mouth;
Barometric control unit 5 comprises barometer 501, aspiration pump 502 and gas tank 503; Barometer 501 is connected on the aspiration pump 502 through conduit, is used to measure the air pressure at extraction valve 405 places.
Structural relation between the above-mentioned parts is following:
The other end of the needle-valve 101 of guiding device 1 is connected with barometric control unit 5, and first flange 102 adopts tightening knob 105 fixing with second flange 206 of plasma generation cavity 2, and seals through pushing the 3rd seal gasket 104; The tubular electrode 204 of plasma generation cavity 2 is connected with supply unit 3 through lead; The 3rd flange 207 that plasma produces cavity 2 adopts tightening knob 406 to be connected with the 4th flange 403 of plasma jet cavity 4, and seals through pushing the 4th seal gasket 407; The alternating-current voltage source of supply unit 3 is 2 power supplies of plasma generation cavity, and the one of which end connects tubular electrode 204, other end ground connection, and the plasma electron density that produces through big young pathbreaker's plasma generation cavity 2 of regulating supply voltage is controlled at 10
8Cm
-3-10
12Cm
-3Between; The extraction valve 405 of plasma jet cavity 4 is connected with the aspiration pump 502 of barometric control unit 5; The gas tank 503 of barometric control unit 5 is connected to the needle-valve 101 of guiding device 1; The air inlet speed that the numerical value of the barometer 501 through observing barometric control unit 5 and the barometer 106 of guiding device 1 comes metering pin valve 101 is used to control air pressure and the flow velocity in the plasma jet cavity 4 in the plasma generation cavity 2.
Operation principle of the present invention is following:
At first, tighten tightening knob 105, tightening knob 202 and tightening knob 406, close needle-valve 101; Open aspiration pump 502 then, begin to bleed, when barometer 501 is stabilized in 20Pa by the time; Open needle-valve 101, in plasma generation cavity 2, charge into inert gas or air, this moment, air pressure began to rise; Continue to bleed, make to be full of inert gas or air in the cavity; When barometer 501 maintains 20Pa once more, when barometer 106 maintains certain set point of 50-300Pa, opening power device 3, output 500V alternating voltage; Voltage between tubular electrode 204 outer walls and cylinder electrode 201 inwalls raises rapidly at this moment, and forms electric field radially, and a spot of free electron is quickened by this electric field in the gas; And bump with atom and molecule in the gas; Self kinetic energy is passed to atom, molecule, make its ionization come from by electronics and cation, thereby electron density is increased; The increase of electron density also can increase the compound speed of electronics and ion simultaneously; Finally, the generation speed and the rate of disappearance of electronics reach balance, and electron density settles out.At this moment, the gas in the plasma generation cavity 2 has been realized glow discharge by ionization.Because the draught head of guiding device 1 and 4 generations of plasma jet cavity; The guide functions of baffle plate 103 and each device guiding gutter; Formation flows to the stable and uniform flow field of plasma jet cavity 4 from water conservancy diversion device 1; Simultaneously because plasma generation cavity 2 is very low with plasma jet cavity 4 internal gas pressures; The electronics free path is very long, and electronics can be diffused in the whole plasma jet cavity 4 along with the stabilized uniform flow field, forms large area electron density and the uniform plasma plane jet of flow velocity.Open direct voltage source 413 then, outside observation window 402, apply the orthogonal constant fixed-field, just can carry out the influence experiment of electric field and magnetic field this moment jet plasma.
Above instance only is to reference explanation of the present invention, does not constitute any restriction to content of the present invention.
Claims (10)
1. plane jet plasma generating device; Comprise: plasma generation cavity (2), supply unit (3) and barometric control unit (5); Supply unit (3) provides power supply for plasma generation cavity (2), it is characterized in that: the left side of plasma generation cavity (2) and right side are connected with guiding device (1) and plasma jet cavity (4) respectively; The outlet side of the inlet end of guiding device (1) and plasma jet cavity (4) is connected with barometric control unit (5), and plasma jet cavity (4) has electrode through hole and observation window, is used to apply quadrature electromagnetism two dimensional field; Gas charges into guiding device (1) from barometric control unit (5); Behind the guiding device current stabilization, flow in the plasma generation cavity (2); Discharge generation plasma in the plasma generation cavity; Flow in the plasma jet cavity (4), flow out through barometric control unit (5) again.
2. device according to claim 1 is characterized in that: guiding device (1) comprising: needle-valve (101), first flange (102), baffle plate (103) and first barometer (106);
One end of needle-valve (101) is fixed on the left end of first flange (102), and the other end is connected with barometric control unit (5);
First barometer (106) is fixed on the lower end of first flange (102), is used to measure the air pressure of inflation;
Baffle plate (103) is placed in the right-hand member groove of first flange (102);
First flange (102) is connected with plasma generation cavity (2) through knob.
3. device according to claim 2 is characterized in that having on the baffle plate (103) evenly distributed manhole (107), so that it is even to flow into the air-flow of plasma generation cavity (2).
4. device according to claim 1 is characterized in that plasma generation cavity (2) comprising: second flange (206), cylinder electrode (201), tubular electrode (204) and the 3rd flange (207);
Second flange (206) and the 3rd flange (207) are connected the symmetrical both sides of cylinder electrode (201) through hole end;
Cylinder electrode (201) both sides up and down is fixed with circular hollow lid (205) respectively, and seals through extruding first seal gasket (203).
Tubular electrode (204) inserts in the cylinder electrode (201) through the centre bore of circular hollow lid (205), the coaxial two ends up and down that are fixed on cylinder electrode (201), and push second seal gasket (208) through nut and seal;
Tubular electrode (204) is connected with supply unit (3) through lead;
The 3rd flange (207) is connected with plasma jet cavity (4).
5. device according to claim 2; First flange (102) that it is characterized in that guiding device (1) adopts tightening knob (105) fixing with second flange (206) of plasma generation cavity (2), and seals through extruding the 3rd seal gasket (104).
6. device according to claim 1 is characterized in that plasma jet cavity (4) comprising: the 4th flange (403), cuboid cavity (401) and trumpet type guiding gutter (404);
The 4th flange (403) is fixed on the left side of cuboid cavity (401);
The typhon mouth of trumpet type guiding gutter (404) is fixed on the right side of cuboid cavity (401);
The toy trumpet mouth of trumpet type guiding gutter (404) is fixed with extraction valve (405), and this extraction valve (405) is connected with barometric control unit (5).
7. device according to claim 6 is characterized in that the left and right sides of cuboid cavity (401) has first guiding gutter (408) and second guiding gutter (409); The both sides, front and back of cuboid cavity (401) have observation window (402), observation window (402) sealing and fixing, and the outside applies magnetic field; The upside of cuboid cavity (401) has first through hole (410) and second through hole (411), in these two through holes, inserts electrode and applies electric field.
8. according to claim 4 or 6 described devices, it is characterized in that the 3rd flange (207) and the 4th flange (403) are fixing through tightening knob (406), and seal through extruding the 4th seal gasket (407).
9. device according to claim 1 is characterized in that barometric control unit (5) comprising: second barometer (501), aspiration pump (502) and gas tank (503);
Gas tank (503) is connected with needle-valve (101), and aspiration pump (502) is connected with extraction valve (405);
Second barometer (501) is fixed on the bleeding point of aspiration pump (502), is used for measuring the air pressure of bleeding.
10. device according to claim 1 is characterized in that the employing aluminum of plasma generation cavity (2) and plasma jet cavity (4) and plating nickel on surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210245290.7A CN102781157B (en) | 2012-07-17 | 2012-07-17 | Planar jet flow plasma generating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210245290.7A CN102781157B (en) | 2012-07-17 | 2012-07-17 | Planar jet flow plasma generating device |
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| Publication Number | Publication Date |
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| CN102781157A true CN102781157A (en) | 2012-11-14 |
| CN102781157B CN102781157B (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210245290.7A Active CN102781157B (en) | 2012-07-17 | 2012-07-17 | Planar jet flow plasma generating device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106231770A (en) * | 2016-09-09 | 2016-12-14 | 国网江苏省电力公司电力科学研究院 | A kind of working gas and the controlled plasma jet of ambient outside air occur and parameter diagnosis system |
| CN108770169A (en) * | 2018-07-23 | 2018-11-06 | 大连海事大学 | A kind of atmospheric non-equilibrium plasma fluidic device introducing protection gas |
| CN112853738A (en) * | 2021-01-05 | 2021-05-28 | 西南交通大学 | Plasma modification device based on electromagnetic field regulation and control |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106231770A (en) * | 2016-09-09 | 2016-12-14 | 国网江苏省电力公司电力科学研究院 | A kind of working gas and the controlled plasma jet of ambient outside air occur and parameter diagnosis system |
| CN108770169A (en) * | 2018-07-23 | 2018-11-06 | 大连海事大学 | A kind of atmospheric non-equilibrium plasma fluidic device introducing protection gas |
| CN108770169B (en) * | 2018-07-23 | 2023-06-06 | 大连海事大学 | Atmospheric pressure unbalanced plasma jet device for introducing shielding gas |
| CN112853738A (en) * | 2021-01-05 | 2021-05-28 | 西南交通大学 | Plasma modification device based on electromagnetic field regulation and control |
| CN112853738B (en) * | 2021-01-05 | 2022-01-18 | 西南交通大学 | Plasma modification device based on electromagnetic field regulation and control |
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| CN102781157B (en) | 2014-12-17 |
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