CN106499603A - A kind of hollow cathode of hall thruster based on magnetic environment installs optimization method - Google Patents
A kind of hollow cathode of hall thruster based on magnetic environment installs optimization method Download PDFInfo
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- CN106499603A CN106499603A CN201611044860.0A CN201611044860A CN106499603A CN 106499603 A CN106499603 A CN 106499603A CN 201611044860 A CN201611044860 A CN 201611044860A CN 106499603 A CN106499603 A CN 106499603A
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- hollow cathode
- hall thruster
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- magnetic
- magnetic induction
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005457 optimization Methods 0.000 title claims abstract description 13
- 230000006698 induction Effects 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 241001415145 Acnistus arborescens Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H—PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H1/00—Using plasma to produce a reactive propulsive thrust
- F03H1/0037—Electrostatic ion thrusters
- F03H1/0062—Electrostatic ion thrusters grid-less with an applied magnetic field
- F03H1/0075—Electrostatic ion thrusters grid-less with an applied magnetic field with an annular channel; Hall-effect thrusters with closed electron drift
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H—PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H1/00—Using plasma to produce a reactive propulsive thrust
- F03H1/0081—Electromagnetic plasma thrusters
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Plasma Technology (AREA)
Abstract
A kind of hollow cathode of hall thruster based on magnetic environment installs optimization method, the method for being related to improve hall thruster efficiency, single in order to solve the existing method for improving hall thruster efficiency, it is impossible to further to improve the problem of hall thruster efficiency.Corresponding magnetic induction density B when minimum of measure hollow cathode potential drop0；Determine hall thruster magnetic induction be B0Magnetic field isophote coordinate set { (r, z) }；Coordinate (the r for extending the hollow cathode life-span is advantageously selected for from coordinate set { (r, z) }0,z0)；Hollow cathode is placed, makes the outlet of hollow cathode be placed in (r0,z0) place；Adjustment hollow cathode angle, makes the axis and (r of hollow cathode0,z0) place magnetic induction line tangent.The present invention is applied to the efficiency for improving hall thruster.
Description
Technical field
The present invention relates to the method for improving hall thruster efficiency.
Background technology
Hall thruster is a kind of plasma propulsion device for fields such as Space Vehicle position holding, surveies of deep space.
Due to the attribute of plasma discharge itself, the performance of this device is very sensitive to the change of plant bulk.Research in the past
Center of gravity is to optimize the physical dimension inside ceramic accelerating cavity, improves hall thruster efficiency by optimized dimensions.Therefore improve
The method of hall thruster efficiency is single, it is impossible to further improve hall thruster efficiency.
Content of the invention
The invention aims to it is single to solve the existing method for improving hall thruster efficiency, it is impossible to further improve
The problem of hall thruster efficiency, the hollow cathode so as to provide a kind of hall thruster based on magnetic environment install optimization side
Method.
A kind of hollow cathode of hall thruster based on magnetic environment of the present invention installs optimization method, the method bag
Include following steps：
Corresponding magnetic induction density B when minimum of measure hollow cathode potential drop0；
Determine hall thruster magnetic induction be B0Magnetic field isophote coordinate set { (r, z) }；
Coordinate (the r for extending the hollow cathode life-span is advantageously selected for from coordinate set { (r, z) }0,z0)；
Hollow cathode is placed, makes the outlet of hollow cathode be placed in (r0,z0) place；
Adjustment hollow cathode angle, makes the axis and (r of hollow cathode0,z0) place magnetic induction line tangent.
Preferably, B0For 20 Gauss～30 Gausses.
Preferably, the coordinate (r in hollow cathode life-span is advantageously selected for from coordinate set { (r, z) }0,z0) method be,
Screen out the coordinate that area is washed away positioned at high-velocity particles from coordinate set { (r, z) }, obtain the coordinate for being conducive to the hollow cathode life-span
(r0,z0).
Research finds that the design outside ceramic accelerating cavity also has more significant impact to hall thruster efficiency.Institute of the present invention
The hollow cathode being related to, is exactly to be located at a subassembly outside accelerating cavity.On the basis of accelerating cavity interior optimization, by adjusting
Whole hollow cathode, can further optimize properties of product.The present invention utilizes magnetic environment residing for hollow cathode to optimize hollow cathode peace
Holding position and angle, so that improve thruster efficiency.
The present invention is applied to the efficiency for improving hall thruster.
Description of the drawings
Fig. 1 is that a kind of hollow cathode of the hall thruster based on magnetic environment described in specific embodiment one installs optimization
The flow chart of method；
Fig. 2 is the hollow cathode schematic view of the mounting position in specific embodiment one；
1 is the axis of hall thruster, and 2 are the magnetic field isophote that magnetic induction is 20 Gauss～30 Gausses, and 3 are
Hollow cathode, 4 is magnetic induction line, and 5 is magnetic pole, and 6 is magnet exciting coil, and 7 is anode (gas distributor), and 8 are ceramic accelerating cavity.
Specific embodiment
Specific embodiment one：Present embodiment, a kind of base described in present embodiment are illustrated in conjunction with Fig. 1 and Fig. 2
Optimization method is installed in the hollow cathode of the hall thruster of magnetic environment, the method is comprised the following steps：
Corresponding magnetic induction density B when minimum of measure hollow cathode potential drop0；
Determine hall thruster magnetic induction be B0Magnetic field isophote coordinate set { (r, z) }；
Coordinate (the r for extending the hollow cathode life-span is advantageously selected for from coordinate set { (r, z) }0,z0)；
Hollow cathode is placed, makes the outlet of hollow cathode be placed in (r0,z0) place；
Adjustment hollow cathode angle, makes the axis and (r of hollow cathode0,z0) place magnetic induction line tangent.
In the efficiency index of hall thruster, it is voltage utilization to have a critically important index.It refers to and is actually used in
The voltage of ion and the ratio of electric power output voltage, the ratio is accelerated to be generally less than 1.Ion accelerating voltage, the electricity of power supply output
Press and the relation between whole machine thrust is：
In formula,
F is the whole machine thrust that particle accelerates to produce, and unit is N；
For mass-flow rate of propellant, unit is kg/s；
Charge numbers of the Z for particle band, Z>=1；
E is electron charge, equal to 1.6X10-19C；
VaccFor ion accelerating voltage, unit is V
MiFor mass particle, unit is kg；
UdThe voltage (constant pressure) of power supply output, unit is V；
Neutral atom is ionized Δ the loss of voltage for needing to pay, and unit is V；
UcpElectronics is transported to the loss of voltage required for accelerating tube i.e. hollow cathode potential drop from negative electrode, and unit is V.
Wherein, UcpMain Function be the extraction electronics from hollow cathode, for electric discharge provides required ionize seed, and
Ion beam current for spraying provides the neutralization electronics of equivalent.As can be seen that due to power supply output voltage be limited and constant,
Ucp, this loss Xiang Yue little unrelated with heavy particle acceleration of Δ, then for acceleration have the voltage of actual contribution bigger, accordingly
Overall efficiency is also higher.
Present embodiment is directed to Ucp, propose to reduce U by the magnetic field environment of change hollow cathode localcp.Main think of
Think it is the characteristics different using the hollow heart cathode fall of different magnetic field environment, after the sizing of thruster magnetic field, by hollow cathode
It is positioned in suitable magnetic field environment.UcpInfluence factor have a lot, magnetic field be one of affect larger and artificially controllable
Factor.Specifically related to two parameters：The magnetic field intensity of hollow cathode pinhole position, and hollow cathode axis and magnetic induction line
Angle.
Specific embodiment two：Present embodiment is to a kind of Hall based on magnetic environment described in specific embodiment one
The hollow cathode of thruster is installed optimization method and is described further, in present embodiment, B0For 20 Gauss～30 Gausses.
Found by numerous studies, magnetic induction be 20 Gauss～30 gauss ranges in space-time heart cathode fall most
Little.Magnetic induction less than the interval or is more than the interval, particularly when magnetic field intensity is in 10 Gauss, cathode fall
Dramatically increase.When the axis of hollow cathode is parallel with magnetic induction line, hollow cathode potential drop is minimum；When the two is orthogonal, should
Potential drop can increase, and very unstable.
By the outlet of hollow cathode is placed in the range of the magnetic induction of 20 Gauss～30 Gausses, and by hollow cathode
Axis and (r0,z0) place magnetic induction line tangent, can significantly reduce hollow cathode potential drop.
Specific embodiment three：Present embodiment is to a kind of Hall based on magnetic environment described in specific embodiment one
The hollow cathode of thruster is installed optimization method and is described further, and in present embodiment, selection from coordinate set { (r, z) } has
Coordinate (r beneficial to the hollow cathode life-span0,z0) method be to screen out from coordinate set { (r, z) } and wash away area positioned at high-velocity particles
Coordinate, obtain the coordinate (r for being conducive to the hollow cathode life-span0,z0).
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of spirit or essential attributes without departing substantially from the present invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit is required rather than described above is limited, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.
Although the present invention is described herein with reference to specific embodiment, it should be understood that, these realities
Apply the example that example is only principles and applications.It should therefore be understood that can carry out to exemplary embodiment
Many modifications, and other arrangements are can be designed that, the spirit of the present invention limited without departing from claims
And scope.It should be understood that can be by way of being different from described by original claim come with reference to different appurtenances
Profit is required and feature specifically described herein.It will also be appreciated that can use with reference to the feature described by separate embodiments
In other described embodiments.
Claims (3)
1. a kind of hollow cathode of hall thruster based on magnetic environment installs optimization method, it is characterised in that the method includes
Following steps：
Corresponding magnetic induction density B when minimum of measure hollow cathode potential drop0；
Determine hall thruster magnetic induction be B0Magnetic field isophote coordinate set { (r, z) }；
Coordinate (the r for extending the hollow cathode life-span is advantageously selected for from coordinate set { (r, z) }0,z0)；
Hollow cathode is placed, makes the outlet of hollow cathode be placed in (r0,z0) place；
Adjustment hollow cathode angle, makes the axis and (r of hollow cathode0,z0) place magnetic induction line tangent.
2. a kind of hollow cathode of hall thruster based on magnetic environment according to claim 1 installs optimization method, its
It is characterised by, B0For 20 Gauss～30 Gausses.
3. a kind of hollow cathode of hall thruster based on magnetic environment according to claim 1 installs optimization method, its
Be characterised by, the coordinate (r in hollow cathode life-span is advantageously selected for from coordinate set { (r, z) }0,z0) method be, from coordinate set
Screen out the coordinate that area is washed away positioned at high-velocity particles in { (r, z) }, obtain the coordinate (r for being conducive to the hollow cathode life-span0,z0).
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| CN201611044860.0A CN106499603B (en) | 2016-11-24 | 2016-11-24 | A kind of hollow cathode installation optimization method of the hall thruster based on magnetic environment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108009386A (en) * | 2017-12-29 | 2018-05-08 | 哈尔滨工业大学 | A kind of hollow cathode touches the optimum design method for holding pole aperture |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080223017A1 (en) * | 2007-03-14 | 2008-09-18 | Japan Aerospace Exploration Agency | Hall-type electric propulsion |
| CN102493936A (en) * | 2011-12-15 | 2012-06-13 | 哈尔滨工业大学 | Hall thrustor based on magnetic focusing |
| CN103953517A (en) * | 2014-05-13 | 2014-07-30 | 哈尔滨工业大学 | Hall thruster improving device |
-
2016
- 2016-11-24 CN CN201611044860.0A patent/CN106499603B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080223017A1 (en) * | 2007-03-14 | 2008-09-18 | Japan Aerospace Exploration Agency | Hall-type electric propulsion |
| CN102493936A (en) * | 2011-12-15 | 2012-06-13 | 哈尔滨工业大学 | Hall thrustor based on magnetic focusing |
| CN103953517A (en) * | 2014-05-13 | 2014-07-30 | 哈尔滨工业大学 | Hall thruster improving device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108009386A (en) * | 2017-12-29 | 2018-05-08 | 哈尔滨工业大学 | A kind of hollow cathode touches the optimum design method for holding pole aperture |
| CN108009386B (en) * | 2017-12-29 | 2021-03-30 | 哈尔滨工业大学 | Optimization design method for aperture of hollow cathode holding electrode |
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| Publication number | Publication date |
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| CN106499603B (en) | 2019-03-29 |
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