CN115711209B - Compensation type gas distributor and electric thruster - Google Patents
Compensation type gas distributor and electric thruster Download PDFInfo
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- CN115711209B CN115711209B CN202310000699.0A CN202310000699A CN115711209B CN 115711209 B CN115711209 B CN 115711209B CN 202310000699 A CN202310000699 A CN 202310000699A CN 115711209 B CN115711209 B CN 115711209B
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Abstract
The invention provides a compensation type gas distributor and an electric thruster, and belongs to the technical field of space equipment thrusters. The gas distributor includes: a dispenser body; an air intake passage provided on the dispenser body; the air outlet channel is arranged on the distributor main body; a buffer chamber disposed within the dispenser body; at least two buffer cavities are communicated in series between the air inlet channel and the air outlet channel; a communication hole communicated between two adjacent buffer cavities; a plurality of communication holes are distributed between two adjacent buffer cavities, and a near-end communication hole closest to the air inlet channel and a far-end communication hole farthest from the air inlet channel are distinguished on the gas flow path; the diameter of the distal communication hole is larger than the diameter of the proximal communication hole. The device has overcome the air current that the buffer chamber air vent that prior art's gas distributor is close to the intake duct is great, and the air current that is farther away from the buffer chamber air vent of intake duct is less, causes the inhomogeneous defect of device whole gassing.
Description
Technical Field
The invention relates to the technical field of space equipment propellers, in particular to a compensating gas distributor and an electric thruster.
Background
Electric thrusters are propulsion devices that rely on electric power to drive the injection of working medium, the most important of which is the hall thruster. The Hall thruster is a propulsion device which utilizes the electromagnetic field to realize the acceleration of the external spray to form a plasma jet source after the ionization of working medium. The power device for providing micro thrust for the on-orbit operation of the spacecraft has the advantages of high efficiency, high specific impulse, high reliability and the like, and is widely applied to propulsion tasks such as lifting, position maintaining, gesture control and the like of the orbit of the spacecraft. The working medium is generally neutral gas, so that the gas distributor for distributing the neutral gas in the discharge channel is not necessarily small. The distribution uniformity of neutral gas in the most annular discharge channel directly influences the thrust performance of the Hall thruster. The problem of uneven gas distribution of the outlet channels arises because there is typically only one or a few inlet channels from the gas source, which have a natural non-correspondence with the numerous outlet channels that ultimately form the annular array. In order to achieve uniform outflow of gas, there are solutions in the prior art that use two or more buffer chambers to homogenize the neutral gas before release. The adjacent buffer cavities are communicated by using ventilation holes with equal spacing and equal diameters, but the scheme ensures that the airflow of the ventilation holes close to the air inlet channel is larger, and the airflow of the ventilation holes far away from the air inlet channel is smaller, so that the non-uniformity of the overall air outlet of the device is finally caused.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defects that the air flow of the buffer cavity vent hole of the air distributor close to the air inlet channel is larger, the air flow of the buffer cavity vent hole far from the air inlet channel is smaller, and the whole air outlet of the device is uneven.
In order to solve the technical problems, the technical scheme adopted by the application is as follows:
a compensated gas dispenser comprising:
a dispenser body;
an air intake passage provided on the dispenser body;
the air outlet channel is arranged on the distributor main body;
a buffer chamber disposed within the dispenser body; at least two buffer cavities are communicated in series between the air inlet channel and the air outlet channel;
a communication hole communicated between two adjacent buffer cavities; a plurality of communication holes are distributed between two adjacent buffer cavities, and a near-end communication hole closest to the air inlet channel and a far-end communication hole farthest from the air inlet channel are distinguished on the gas flow path; the diameter of the distal communication hole is larger than the diameter of the proximal communication hole.
Alternatively, a plurality of communication holes are provided between the proximal communication hole and the distal communication hole along the gas flow path, and the diameters of the communication holes sequentially increase from the proximal communication hole to the distal communication hole.
Alternatively, the difference in diameters of adjacent communication holes tends to gradually increase in the gas flow path.
Optionally, the distributor body is annular, the air outlet channels are distributed in an annular array around the axis of the distributor body, and the air outlet channels are opened towards the radial direction of the distributor body.
Optionally, the distributor body is provided with an air outlet groove along the circumferential direction, a wall surface of the air outlet groove, which is close to the inner side of the distributor body, is an air groove inner side wall, a wall surface of the air outlet groove, which is close to the outer side of the distributor body, is an air groove outer side wall, and air outlet channels are formed in the air groove inner side wall and the air groove outer side wall.
Optionally, the air outlet channels on the inner side wall of the air tank and the air outlet channels on the outer side wall of the air tank are distributed in a staggered phase.
Optionally, the dispenser body includes:
the base is provided with an air inlet channel in a penetrating way;
the H-shaped component is a revolving body with an H-shaped section; the orientation of the upper opening and the lower opening of the H-shaped component is consistent with the axial direction of the rotary shaft; an opening at one side of the H-shaped component and the base are surrounded to form a first buffer cavity; a communication hole is formed in the middle transverse structure of the H-shaped component; the communication holes are circumferentially distributed around the rotary shaft;
the air groove component is a revolution body with a concave section; the concave part of the air groove component forms the air groove; the opening at the other side of the H-shaped component and the air groove component are surrounded to form a second buffer cavity.
Alternatively, the area A of the proximal communication hole 0 The formula is satisfied:
wherein, C is a single-hole preset conductance distributed according to the number of the communication holes; alpha is the clausin coefficient, also called transmission probability; r is a gas mole constant; t is the gas temperature; m is the gas molar mass.
Optionally, the number of the air inlet channels is one, and 18 communication holes are uniformly distributed around the circumference of the rotating shaft; the gas is divided into a semicircular flow path in the first buffer cavity, and the communication holes are symmetrically divided into two groups; along the gas flow path, the pore diameters of each group of communication holes 8 are distributed in a ratio of 1.0/1.1/1.2/1.4/1.6/1.9/2.2/2.6/3.0.
An electric thruster comprising:
a thruster body;
a compensating gas distributor as hereinbefore described mounted on said thruster body.
By adopting the technical scheme, the invention has the following technical effects:
1. according to the compensation type gas distributor provided by the invention, the diameter of the far-end communication hole far away from the gas inlet channel is relatively increased, so that when neutral gas flows out of the gas inlet channel and reaches the far-end communication hole through a long stroke, the gas outlet quantity of the neutral gas can be enhanced through the large-diameter communication hole, thereby compensating the flow loss caused by the fact that the gas flow is far away from a gas source, enabling the communication hole to obtain relatively balanced gas outlet quantity no matter at the near end or the far end of the gas source, further improving the flow uniformity of the neutral gas between the previous buffer cavity and the next buffer cavity, finally obtaining more uniform gas outlet effect in the gas outlet channel, and enabling the more uniform neutral gas to obtain more sufficient ionization in the discharge channel behind the gas outlet channel, so that the thrust performance of the Hall thruster is improved.
2. According to the compensating gas distributor provided by the invention, the diameters of the communication holes from the near-end communication hole to the far-end communication hole are sequentially increased, and the diameter difference of the adjacent holes is gradually increased, so that the neutral gas is more fully and uniformly distributed in the circumferential direction of the gas distributor.
3. The compensation type gas distributor provided by the invention adopts the gas tank structure to be matched with the radial opening of the gas outlet channel, so that neutral gas can be filled in the gas tank after flowing out of the gas outlet channel, and the gas tank is annularly arranged along the circumferential direction of the device, so that the gas can be homogenized in the circumferential direction of the device before entering the subsequent discharge channel, and the gas outlet uniformity is improved. And the two side walls of the air groove are provided with the air outlet channels, so that the air outlet efficiency of the device is improved, and the homogenization effect of the air after flowing out is improved due to the increase of the air outlet channels.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic cross-sectional view of the structure of embodiment 1 of the present invention;
fig. 2 is a schematic perspective view of the structure of embodiment 1 of the present invention;
fig. 3 is a schematic perspective view of the structure of the air tank member of embodiment 1 of the present invention;
fig. 4 is a schematic perspective view of the structure of the H-shaped member of embodiment 1 of the present invention;
FIG. 5 is a schematic plan view showing the structure of the H-shaped member of embodiment 1 of the present invention in the form of model 0;
FIG. 6 is a schematic plan view showing the structure of the H-shaped member of embodiment 1 of the present invention in the form of model 1;
FIG. 7 is a schematic plan view showing the structure of the H-shaped member of embodiment 1 of the present invention in the form of model 2;
FIG. 8 is a schematic plan view showing the structure of the H-shaped member of embodiment 1 of the present invention as a model 3;
FIG. 9 is a schematic top sectional view of the air tank member of embodiment 1 of the present invention as model 0;
fig. 10 is a schematic top sectional view of the air tank member of embodiment 1 of the present invention as a model 4;
FIG. 11 is a graph showing the comparison of the molecular number density distribution of neutral gas on the circumferential section of the discharge channel for models 0-4;
FIG. 12 is a graph showing the contrast of the distribution of the difference rate of the number density of molecules on the circumferential section of the discharge channel in models 0 to 4.
Reference numerals illustrate:
1. a base; 2. an H-shaped lower baffle; 3. an H-shaped middle baffle; 4. an H-shaped upper baffle; 5. the top surface of the air groove; 6. an air intake passage; 7. a first buffer chamber; 8. a communication hole; 9. a second buffer chamber; 10. an air gap; 11. an air outlet channel; 12. an air groove member; 13. an air inlet column; 14. fixing a stud; 15. an air inlet column mounting hole; 16. stud mounting holes; 17. the inner side wall of the air groove; 18. the outer side wall of the air groove; 19. the bottom wall of the air tank, 20 and an H-shaped component.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are directions or positional relationships based on the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
The present embodiment provides a compensated gas distributor.
In one embodiment, as shown in fig. 1 to 4, and fig. 6 to 8, it includes: the distributor body, the inlet channel 6, the outlet channel 11, the buffer chamber and the communication hole 8. The inlet channel 6 and the outlet channel 11 are both arranged on the distributor body. A buffer chamber disposed within the dispenser body; at least two buffer chambers are connected in series between the air inlet channel 6 and the air outlet channel 11. The communication hole 8 communicates between two adjacent ones of the buffer chambers. A plurality of communication holes 8 are distributed between two adjacent ones of the buffer chambers, and a proximal communication hole closest to the intake passage 6 and a distal communication hole farthest from the intake passage 6 are distinguished in the gas flow path. The diameter of the distal communication hole is larger than the diameter of the proximal communication hole.
The gas distributor relatively enlarges the diameter of the far-end communication hole far away from the gas inlet channel 6, so that when neutral gas flows out of the gas inlet channel 6 and reaches the far-end communication hole through a long stroke, the gas outlet quantity of the neutral gas can be enhanced through the large-diameter communication hole 8, thereby compensating the flow loss caused by the fact that gas flows far away from a gas source, enabling the communication hole 8 to obtain relatively balanced gas outlet quantity no matter at the near end or the far end of the gas source, further improving the flow uniformity of the neutral gas between a previous buffer cavity and a next buffer cavity, finally obtaining more uniform gas outlet effect at the gas outlet channel 11, enabling the more uniform neutral gas to obtain more sufficient ionization at the discharge channel behind the neutral gas, and improving the thrust performance of the Hall thruster.
Taking the model 1 shown in fig. 6 as an example, the diameter D1 of the proximal communication hole closest to the air inlet channel 6 is 1.3mm, the diameter D9 of the distal communication hole is 3.3mm, compared with the model 0 shown in fig. 5, the diameter D1 of all the communication holes 8 is 1.3mm, and finally as shown in fig. 11, the neutral gas molecular number density distribution line (i.e. the curve of the original model in the figure) of the model 0 has a large recess far from the air source end (i.e. the curve of the original model in the figure), the distribution uniformity is poor, the neutral gas molecular number density of the model 1 is obviously enhanced far from the air source end, and the curve forms a compensatory peak, so that the uniformity of the air amount of the air distributor is improved. As shown in fig. 12, the maximum difference rate and the average difference rate of the molecular number density of the model 1 are lower than those of the model 0, so that the uniformity of the gas is improved.
It should be noted that, although the embodiments of fig. 1 to 4 and fig. 6 to 8 are in the form of a single air intake passage 6, the offset type air distributor of the present embodiment is not limited to a single air intake passage 6, and in the case of having a plurality of air intake passages 6, corresponding proximal communication holes and distal communication holes may be formed, but the distal communication holes need to be the farthest holes in the air path with respect to the adjacent two air intake passages 6. And the overall gas outlet uniformity of the device can be improved after the diameter of the distal communication hole is increased.
In the above-mentioned selection of the size of the proximal communication hole, the area A of the proximal communication hole is preferably set to 0 The formula is satisfied:
wherein, C is a single-hole preset conductance equally divided according to the number of the communication holes 8, and the conductance represents the capacity of the vacuum pipeline to pass through the gas; alpha is the clausin coefficient, also called transmission probability; r is a gas mole constant; t is the gas temperature; m is the gas molar mass.
The proximal communication hole calculated by the formula can be used as a reference for designing the communication hole 8, and the diameter of the distal communication hole can be increased only by the reference, so that the overall air outlet uniformity of the whole device can be effectively improved.
Based on the above-described embodiments, in an alternative embodiment, as shown in fig. 7 and 8, a plurality of communication holes 8 are provided between the proximal communication hole and the distal communication hole along the gas flow path, the communication holes 8 sequentially increasing in diameter from the proximal communication hole to the distal communication hole.
Taking the model 2 shown in fig. 7 and the model 3 shown in fig. 8 as examples, which each have communication holes 8 with diameters sequentially increasing, as compared with the model 1 shown in fig. 6 in which only the diameters of the distal communication holes are increased, the number of neutral gas molecular density and the maximum difference rate of the number of molecular density of the models 2 and 3 are improved and increased as compared with those of the model 1 shown in fig. 11 and 12. It should be noted that, since the diameters of the communication holes 8 between the proximal communication holes and the distal communication holes of the models 2 and 3 are increased to enhance the gas uniformity in the middle stage, the compensatory peaks at the distal end of the gas source as in the model 1 do not appear in fig. 11, but the gas uniformity of the models 2 and 3 as a whole is improved.
Based on the above-described embodiments, in an alternative embodiment, as shown in fig. 8, the difference in diameters of the adjacent communication holes 8 gradually increases in the gas flow path. Specifically, taking the model 3 shown in fig. 8 as an example, the only air intake passages 6 are arranged at 9 o' clock of the circular ring in the figure, and 18 communication holes 8 are uniformly distributed around the center of the circular ring, that is, around the circumference of the rotating shaft of the illustrated H-shaped member 20. Since the gas is divided into two paths along the annular first buffer chamber 7, each path is a semicircular flow path, the communication holes 8 are divided into two symmetrical groups; the diameters of 9 holes from the near-end communication hole to the far-end communication hole in each group are D1-D9, and the pore diameters are distributed in the ratio of 1.0/1.1/1.2/1.4/1.6/1.9/2.2/2.6/3.0. The diameter of the group is characterized in that the diameter difference of the adjacent holes gradually increases, for example, the adjacent diameter difference of the front 3 holes is 0.1, the adjacent diameter difference is increased to 0.2 later, and the difference of 0.4 is finally reached after the difference of 0.3. It should be noted that the diameter difference gradually increases only in the general direction, and it is not particularly meant that each set of adjacent diameter differences should be increased as compared with the former, for example, the diameter differences of the first two sets (D1 and D2, D2 and D3) remain unchanged by 0.1, which is actually the result of rounding due to design consideration, but the subsequent differences gradually increase.
In contrast to the model 2 shown in fig. 7, the diameters of the holes D1 to D9 are set in an arithmetic progression, that is, the diameter difference between the adjacent holes is a constant value, specifically, the diameter is from 1.3mm to 3.3mm, and the adjacent difference is fixed to 0.25mm. This constant diameter difference arrangement provides relatively poor homogenization of the gas flow compared to the gradually increasing difference arrangement, as can be seen in FIG. 11, where the molecular weight density of model 2 is still reduced at the distal end of the gas source, and a very pronounced dip is shown in the curve. Whereas the curve of model 3 is relatively straight, resulting in a more adequate homogenization of the neutral gas in the circumferential direction of the gas distributor.
Based on the above embodiment, in an alternative embodiment, as shown in fig. 1 to 3, the distributor body is annular, the air outlet channels 11 are arranged in an annular array around the axis of the distributor body, and the air outlet channels 11 are opened towards the radial direction of the distributor body.
Since the ions in the discharge channel have a back flow phenomenon, sputter coating is generated on the impact surface along the electric field direction, usually the axial direction of the gas distributor, if the gas outlet channel 11 is opened along the axial direction of the distributor body, the diameter of the gas is easily changed by the sputter coating after long-term operation, thereby causing uneven gas distribution. The radial opening of the gas outlet channel 11 can avoid this problem.
Based on the above embodiment, in an alternative embodiment, as shown in fig. 1 to 3, the dispenser body is provided with an air outlet groove along the circumferential direction, the bottom surface of the air outlet groove is an air groove bottom wall 19, the wall surface of the air outlet groove near the inner side of the dispenser body is an air groove inner side wall 17, and the wall surface of the air outlet groove near the outer side of the dispenser body is an air groove outer side wall 18. The air outlet channel 11 is arranged on the inner side wall 17 and the outer side wall 18 of the air tank.
After the air groove structure is matched with the air outlet channel 11 to be radially arranged, neutral gas flows out from the air gap 10 to the air outlet channel 11 and is filled in the air groove at first, and the air groove is annularly arranged along the circumferential direction of the device, so that the gas is homogenized in the circumferential direction of the device before entering the following discharge channel, and the air outlet uniformity is improved. And the two side walls of the air groove are provided with the air outlet channels 11, so that the air outlet efficiency of the device is improved, and the homogenization effect of the air after flowing out is improved due to the increase of the air outlet channels 11.
Based on the above embodiment, in an alternative embodiment, as shown in fig. 10, the air outlet channels 11 on the inner wall 17 of the air tank and the air outlet channels 11 on the outer wall 18 of the air tank are in a staggered phase distribution. The staggered phase refers to the phase angle of the inner air outlet channel 11 on the circular ring as shown in the figure, which is different from the phase angle of the outer air outlet channel 11 and is staggered with each other. In contrast to the embodiment shown in fig. 9, the phase angles of the air outlet channels 11 on the inner and outer sides are the same. In the case where the pattern 4 is formed after the arrangement of the communication holes 8 shown in fig. 8 and the gas outlet channels 11 shown in fig. 10 are combined, and the aforementioned patterns 0 to 3 all use the gas outlet channels 11 shown in fig. 9, the final gas homogenizing effect is as shown in fig. 11 and 12, from which it can be seen that the pattern 4 using the phase-staggered gas outlet channels 11 is superior to the pattern 3 previously shown, which further increases the number of circumferential molecular density and greatly reduces the maximum difference rate and the average difference rate of the molecular number density. This results mainly from the fact that the staggered-phase gas outlet channels 11 shorten the gas slot filling distance between adjacent gas outlet channels 11, so that the gas flow can be filled in the gas slots more quickly and fully, and continue to flow to the subsequent discharge channels after the gas slots are filled, and the overall gas outlet uniformity of the device is improved.
Based on the above embodiments, in an alternative embodiment, as shown in fig. 1 to 4, the dispenser body includes: a base 1, an H-shaped member 20 and an air channel member 12. The base 1 is provided with an air inlet channel 6. An intake column mounting hole 15 may also be provided at the end of the intake passage 6 for connection to the intake column 13. And a stud mounting hole 16 can be further formed in the base 1 for connecting the fixing stud 14. The H-shaped member 20 is a revolving body with an H-shaped cross section, and specifically includes an H-shaped lower baffle 2, an H-shaped middle baffle 3, and an H-shaped upper baffle 4. The upper and lower openings of the H-shaped member 20, that is, the upper opening formed by the H-shaped upper baffles 4 on both sides and the lower opening formed by the H-shaped lower baffles 2 on both sides are oriented in line with the axial direction of the rotation shaft. The lower opening of the H-shaped member 20 and the base 1 enclose a first buffer chamber 7. The middle cross structure of the H-shaped member 20, i.e., the H-shaped middle baffle 3 is provided with a communication hole 8. The communication holes 8 are circumferentially distributed around the swivel axis. The air groove member 12 is a revolution body having a concave cross section. The concave portion of the air channel member 12 forms the air channel; the recess notch of the air groove member 12 is the air groove top surface 5. The upper opening of the H-shape and the air groove component 12 enclose a second buffer cavity 9.
This structure reduces the overall manufacturing cost of the device by dividing the dispenser body having a plurality of structures such as two buffer chambers, a communication hole 8 between the two chambers, and an air tank into three parts of a simple shape, each of which is easy to manufacture.
Example 2
The present embodiment provides an electric thruster.
In one embodiment, it includes a thruster body and a compensating gas distributor. The compensating gas distributor is constructed as described in example 1 and is mounted on the thruster body.
The use of the offset gas distributor of embodiment 1 allows the neutral gas to be uniformly distributed in the discharge channel, so that, for example, the neutral gas can be sufficiently ionized, the thrust of the thruster is improved, and the thrust balance is enhanced.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (9)
1. A compensated gas dispenser comprising:
a dispenser body;
an air intake passage (6) provided in the dispenser body;
an air outlet channel (11) provided on the dispenser body;
a buffer chamber disposed within the dispenser body; at least two buffer cavities are communicated in series between the air inlet channel (6) and the air outlet channel (11);
a communication hole (8) communicated between two adjacent buffer chambers; a plurality of communication holes (8) are distributed between two adjacent buffer cavities, and a near-end communication hole closest to the air inlet channel (6) and a far-end communication hole farthest from the air inlet channel (6) are distinguished on a gas flow path; the diameter of the distal communication hole is larger than that of the proximal communication hole;
along the gas flow path, a plurality of communication holes (8) are provided between the proximal communication hole and the distal communication hole, and the diameters of the communication holes (8) from the proximal communication hole to the distal communication hole sequentially increase.
2. A compensating gas distributor according to claim 1, characterized in that the difference in diameter between adjacent communication holes (8) in the gas flow path is in a gradual increasing trend.
3. A compensated gas distributor according to claim 1 or 2, wherein the distributor body is annular, the gas outlet channels (11) are arranged in an annular array around the axis of the distributor body, the gas outlet channels (11) being open radially towards the distributor body.
4. A compensated gas dispenser according to claim 3, wherein the dispenser body is provided with gas outlet grooves along the circumferential direction, the wall surface of the gas outlet grooves adjacent to the inner side of the dispenser body is a gas groove inner side wall (17), the wall surface of the gas outlet grooves adjacent to the outer side of the dispenser body is a gas groove outer side wall (18), and gas outlet channels (11) are formed in the gas groove inner side wall (17) and the gas groove outer side wall (18).
5. A compensated gas distributor according to claim 4, wherein the gas outlet channels (11) in the inner side wall (17) of the gas tank are in a staggered phase distribution with the gas outlet channels (11) in the outer side wall (18) of the gas tank.
6. The compensated gas dispenser of claim 4 wherein the dispenser body comprises:
a base (1) through which an air inlet channel (6) is formed;
an H-shaped member (20) which is a solid of revolution having an H-shaped cross section; the orientation of the upper opening and the lower opening of the H-shaped component (20) is consistent with the rotation axis; the opening at one side of the H shape and the base (1) are surrounded to form a first buffer cavity (7); a communication hole (8) is arranged on the middle transverse structure of the H-shaped component (20); the communication holes (8) are circumferentially distributed around the rotary shaft;
an air groove member (12) which is a revolution body having a concave cross section; the concave part of the air groove component (12) forms the air groove; the opening at the other side of the H-shaped component (20) and the air groove component (12) are surrounded to form a second buffer cavity (9).
7. A compensated gas distributor according to claim 6, wherein the area a of the proximal communication hole 0 The formula is satisfied:
wherein C is a single-hole preset conductance distributed according to the number of the communication holes (8); alpha is the clausin coefficient, also called transmission probability; r is a gas mole constant; t is the gas temperature; m is the gas molar mass.
8. A compensated gas distributor according to claim 7, wherein the number of inlet channels (6) is one, and the communication holes (8) are evenly distributed with 18 around the circumference of the swivel shaft; the gas is divided into a semicircular flow path in the first buffer cavity (7), and the communication holes (8) are symmetrically divided into two groups; along the gas flow path, the pore size of each group of communication holes (8) is distributed in a ratio of 1.0/1.1/1.2/1.4/1.6/1.9/2.2/2.6/3.0.
9. An electric thruster, comprising:
a thruster body;
the compensated gas dispenser of any one of claims 1 to 8 mounted on the thruster body.
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| Title |
|---|
| 供气周向不均匀对霍尔推力器放电特性及性能的影响;范金蕤 等;中国空间科学技术;第36卷(第1期);全文 * |
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|---|---|
| CN115711209A (en) | 2023-02-24 |
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